[ { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9pcz2-9nj34", "eprint_id": 121532, "eprint_status": "archive", "datestamp": "2023-08-22 20:52:44", "lastmod": "2023-10-20 15:37:42", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Alvarez-Carlos", "name": { "family": "Alvarez", "given": "Carlos" }, "orcid": "0000-0003-0815-7953" }, { "id": "Kassis-Marc", "name": { "family": "Kassis", "given": "Marc" } }, { "id": "Greffe-Timoth\u00e9e", "name": { "family": "Greffe", "given": "Timothee" }, "orcid": "0000-0003-4594-1827" }, { "id": "Smith-Roger-M", "name": { "family": "Smith", "given": "Roger" }, "orcid": "0000-0001-7062-9726" }, { "id": "Barillot-Marc", "name": { "family": "Barillot", "given": "Marc" } }, { "id": "Campbell-Randall-D", "name": { "family": "Campbell", "given": "Randall" }, "orcid": "0000-0002-3289-5203" }, { "id": "Gomez-Percy", "name": { "family": "Gomez", "given": "Percy" }, "orcid": "0000-0003-0408-9850" }, { "id": "Kirby-E-N", "name": { "family": "Kirby", "given": "Evan N." }, "orcid": "0000-0001-6196-5162" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Roberts-Mitsuko", "name": { "family": "Roberts", "given": "Mitsuko" } }, { "id": "Weber-Roberto-A", "name": { "family": "Weber", "given": "Roberto" } }, { "id": "Hale-David-D-S", "name": { "family": "Hale", "given": "David" } }, { "id": "Cavalieri-David", "name": { "family": "Cavalieri", "given": "David" } }, { "id": "Holewczynski-Joshua", "name": { "family": "Holewczynski", "given": "Joshua" } }, { "id": "Smous-James", "name": { "family": "Smous", "given": "James" } }, { "id": "Kwok-Shui-H", "name": { "family": "Kwok", "given": "Shui H." } }, { "id": "Chan-Dwight", "name": { "family": "Chan", "given": "Dwight" } }, { "id": "Dahler-Mike", "name": { "family": "Dahler", "given": "Mike" } } ] }, "title": "Upgrades to W. M. Keck observatory detector systems", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2023 Wiley-VCH. \n\nWe would like to thank the Mt. Cuba Astronomical Foundation for their support of the NIRES guider upgrade. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.", "abstract": "We report on our plans to upgrade the detector systems in the 2022\u20132024 time frame for three of the workhorse instruments (NIRC2, DEIMOS, and NIRES) operated by the W. M. Keck Observatory. The upgrades are done in collaboration with Observatory partner institutions and other Maunakea observatories. The main motivating factors behind these upgrades are to tackle obsolescence of hardware and software components, to boost observing efficiency, to enhance the instrument throughput, and to add new observing functionality.", "date": "2023-07-12", "date_type": "published", "publication": "Astronomische Nachrichten", "publisher": "Wiley", "pagerange": "Art. No. e20230062", "id_number": "CaltechAUTHORS:20230525-772698100.19", "issn": "0004-6337", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230525-772698100.19", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1002/asna.20230062", "resource_type": "article", "pub_year": "2023", "author_list": "Alvarez, Carlos; Kassis, Marc; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/35ctj-pr036", "eprint_id": 122140, "eprint_status": "archive", "datestamp": "2023-08-20 16:56:41", "lastmod": "2023-10-20 19:02:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Agrawal-Shubh", "name": { "family": "Agrawal", "given": "Shubh" }, "orcid": "0000-0003-2429-5811" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Konopacky-Quinn-M", "name": { "family": "Konopacky", "given": "Quinn M." }, "orcid": "0000-0002-9936-6285" }, { "id": "Macintosh-Bruce-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nielsen-Eric-L", "name": { "family": "Nielsen", "given": "Eric L." }, "orcid": "0000-0001-6975-9056" }, { "id": "Hoch-Kielan-K-W", "name": { "family": "Hoch", "given": "Kielan K. W." }, "orcid": "0000-0002-9803-8255" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Barman-Travis-S", "name": { "family": "Barman", "given": "Travis S." }, "orcid": "0000-0002-7129-3002" }, { "id": "Thompson-William", "name": { "family": "Thompson", "given": "William" }, "orcid": "0000-0001-5684-4593" }, { "id": "Greenbaum-Alexandra-Z", "name": { "family": "Greenbaum", "given": "Alexandra Z." }, "orcid": "0000-0002-7162-8036" }, { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Patience-Jenny", "name": { "family": "Patience", "given": "Jenny" }, "orcid": "0000-0001-9004-803X" } ] }, "title": "Detecting Exoplanets Closer to Stars with Moderate Spectral Resolution Integral-field Spectroscopy", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nThis research was funded in part by the Gordon and Betty Moore Foundation through grant GBMF8550 and by NASA ROSES XRP award 80NSSC19K0294 to M.L. and D.M. J.-B.R. acknowledges support from the David and Ellen Lee Prize Postdoctoral Fellowship. S.A.'s work was supported by the Rita A. and \u00d8istein Skjellum SURF Fellowship.\n\nK.K.W.H., Q.M.K., and T.S.B. acknowledge support by the National Aeronautics and Space Administration under ROSES grant No. 80NSSC21K0573 issued through the Astrophysics Division of the Science Mission Directorate.\n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA. The Keck Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We also wish to recognize the very important cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacility: Keck I (OSIRIS). - \n\nSoftware: astropy 21 (Astropy Collaboration et al. 2013, 2018, 2022), Matplotlib 22 (Hunter 2007), breads 23 24 (this work; Agrawal (2022)), emcee 25 (Foreman-Mackey et al. 2013), corner (Foreman-Mackey 2016).\n\n
Published - Agrawal_2023_AJ_166_15.pdf
", "abstract": "While radial velocity surveys have demonstrated that the population of gas giants peaks around 3 au, the most recent high-contrast imaging surveys have only been sensitive to planets beyond \u223c10 au. Sensitivity at small angular separations from stars is currently limited by the variability of the point-spread function. We demonstrate how moderate-resolution integral-field spectrographs can detect planets at smaller separations (\u2272 0.3\") by detecting the distinct spectral signature of planets compared to the host star. Using OSIRIS (R \u2248 4000) at the W.M. Keck Observatory, we present the results of a planet search via this methodology around 20 young targets in the Ophiuchus and Taurus star-forming regions. We show that OSIRIS can outperform high-contrast coronagraphic instruments equipped with extreme adaptive optics and non-redundant masking in the 0.05\"\u20130.3\" regime. As a proof of concept, we present the 34\u03c3 detection of a high-contrast M dwarf companion at \u22480.1\" with flux ratio of \u2248 0.92% around the field F2 star HD 148352. We developed an open-source Python package, breads, for the analysis of moderate-resolution integral-field spectroscopy data in which the planet and the host star signal are jointly modeled. The diffracted starlight continuum is forward-modeled using a spline model, which removes the need for prior high-pass filtering or continuum normalization. The code allows for analytic marginalization of linear hyperparameters, which simplifies the posterior sampling of other parameters (e.g., radial velocity, effective temperature). This technique could prove very powerful when applied to integral-field spectrographs such as NIRSpec on the JWST and other upcoming first-light instruments on the future Extremely Large Telescopes.", "date": "2023-07", "date_type": "published", "publication": "Astronomical Journal", "volume": "166", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 15", "id_number": "CaltechAUTHORS:20230705-943252200.32", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230705-943252200.32", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Gordon and Betty Moore Foundation", "grant_number": "GBMF8550" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "NASA", "grant_number": "80NSSC21K0573" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/acd6a3", "primary_object": { "basename": "Agrawal_2023_AJ_166_15.pdf", "url": "https://authors.library.caltech.edu/records/35ctj-pr036/files/Agrawal_2023_AJ_166_15.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Agrawal, Shubh; Ruffio, Jean-Baptiste; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2b41a-r1s24", "eprint_id": 122124, "eprint_status": "archive", "datestamp": "2023-08-20 16:53:24", "lastmod": "2023-10-20 18:59:59", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Long-Feng", "name": { "family": "Long", "given": "Feng" }, "orcid": "0000-0002-7607-719X" }, { "id": "Ren-Bin-B", "name": { "family": "Ren", "given": "Bin B." }, "orcid": "0000-0003-1698-9696" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Harsono", "given": "Daniel" }, "orcid": "0000-0001-6307-4195" }, { "name": { "family": "Herczeg", "given": "Gregory J." }, "orcid": "0000-0002-7154-6065" }, { "name": { "family": "Pinilla", "given": "Paola" }, "orcid": "0000-0001-8764-1780" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "name": { "family": "Andrews", "given": "Sean M." }, "orcid": "0000-0003-2253-2270" }, { "name": { "family": "Bai", "given": "Xue-Ning" }, "orcid": "0000-0001-6906-9549" }, { "name": { "family": "Cabrit", "given": "Sylvie" }, "orcid": "0000-0002-1593-3693" }, { "name": { "family": "Cieza", "given": "Lucas A." }, "orcid": "0000-0002-2828-1153" }, { "name": { "family": "Johnstone", "given": "Doug" }, "orcid": "0000-0002-6773-459X" }, { "name": { "family": "Leisenring", "given": "Jarron M." }, "orcid": "0000-0002-0834-6140" }, { "name": { "family": "Lodato", "given": "Giuseppe" }, "orcid": "0000-0002-2357-7692" }, { "name": { "family": "Liu", "given": "Yao" } }, { "name": { "family": "Manara", "given": "Carlo F." }, "orcid": "0000-0003-3562-262X" }, { "name": { "family": "Mulders", "given": "Gijs D." }, "orcid": "0000-0002-1078-9493" }, { "name": { "family": "Ragusa", "given": "Enrico" }, "orcid": "0000-0001-5378-7749" }, { "name": { "family": "Sallum", "given": "Steph" }, "orcid": "0000-0001-6871-6775" }, { "name": { "family": "Shi", "given": "Yangfan" }, "orcid": "0000-0001-9277-6495" }, { "name": { "family": "Tazzari", "given": "Marco" }, "orcid": "0000-0003-3590-5814" }, { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "name": { "family": "Wagner", "given": "Kevin" }, "orcid": "0000-0002-4309-6343" }, { "name": { "family": "Wilner", "given": "David J." }, "orcid": "0000-0003-1526-7587" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" } ] }, "title": "A Large Double-ring Disk Around the Taurus M Dwarf J04124068+2438157", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nF.L. thanks Rixin Li and Shangjia Zhang for insightful discussions. Support for F.L. was provided by NASA through the NASA Hubble Fellowship grant #HST-HF2-51512.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. F.L. and S.A. acknowledge funding support from the National Aeronautics and Space Administration under grant No. 17-XRP17 _ 2-0012 issued through the Exoplanets Research Program. D.H. is supported by Center for Informatics and Computation in Astronomy (CICA) grant and grant No. 110J0353I9 from the Ministry of Education of Taiwan. D.H. also acknowledges support from the National Science and Technology Council of Taiwan through grant No. 111B3005191. G.J.H and Y.S. are supported by grant 12173003 from the National Natural Science Foundation of China. G.D.M. acknowledges support from FONDECYT project 11221206, from ANID\u2014Millennium Science Initiative\u2014ICN12_009, and the ANID BASAL project FB210003. D.J. is supported by NRC Canada and by an NSERC Discovery Grant. Y.L. acknowledges the financial support by the Natural Science Foundation of China (grant No. 11973090). L.C. was supported by ANID through the Milennium Science Initiative Program (NCN2021_080) and the FONDECYT Grant 1211656. E.R. acknowledges financial support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 864965, PODCAST) C.F.M is funded by the European Union (ERC, WANDA, 101039452). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (PROTOPLANETS, grant agreement No. 101002188). This research was funded in part by the Gordon and Betty Moore Foundation through grant GBMF8550 to M. Liu. K.W. is supported by NASA through the NASA Hubble Fellowship grant HST- HF2-51472.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. J.L. acknowledges funding from JWST/NIRCam contract to the University of Arizona, NAS5-02105 This research is partially supported by NASA ROSES XRP, award 80NSSC19K0294. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Part of the computations presented here were conducted in the Resnick High Performance Computing Center, a facility supported by Resnick Sustainability Institute at the California Institute of Technology.\n\nThis paper makes use of the following ALMA data: ADS/JAO.ALMA#2019.1.00566.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. \n\nFacilities: ALMA - Atacama Large Millimeter Array, Keck II (NIRC2). - \n\nSoftware: emcee (Foreman-Mackey et al. 2013), CASA (CASA Team et al. 2022), pynrc (Leisenring et al. 2022), VIP (Gomez Gonzalez et al. 2017).\n\nPublished - Long_2023_ApJ_949_27.pdf
", "abstract": "Planet formation imprints signatures on the physical structures of disks. In this paper, we present high-resolution (\u223c50 mas, 8 au) Atacama Large Millimeter/submillimeter Array observations of 1.3 mm dust continuum and CO line emission toward the disk around the M3.5 star 2MASS J04124068+2438157. The dust disk consists of only two narrow rings at radial distances of 0.\"47 and 0.\"78 (\u223c70 and 116 au), with Gaussian \u03c3 widths of 5.6 and 8.5 au, respectively. The width of the outer ring is smaller than the estimated pressure scale height by \u223c25%, suggesting dust trapping in a radial pressure bump. The dust disk size, set by the location of the outermost ring, is significantly larger (by 3\u03c3) than other disks with similar millimeter luminosity, which can be explained by an early formation of local pressure bump to stop radial drift of millimeter dust grains. After considering the disk's physical structure and accretion properties, we prefer planet\u2013disk interaction over dead zone or photoevaporation models to explain the observed dust disk morphology. We carry out high-contrast imaging at the L' band using Keck/NIRC2 to search for potential young planets, but do not identify any source above 5\u03c3. Within the dust gap between the two rings, we reach a contrast level of \u223c7 mag, constraining the possible planet below \u223c2\u20134 M_(Jup). Analyses of the gap/ring properties suggest that an approximately Saturn-mass planet at \u223c90 au is likely responsible for the formation of the outer ring, which can potentially be revealed with JWST.", "date": "2023-05-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "949", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 27", "id_number": "CaltechAUTHORS:20230705-940527100.4", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230705-940527100.4", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51512.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "17-XRP17_2-0012" }, { "agency": "Ministry of Education (Taipei)", "grant_number": "110J0353I9" }, { "agency": "National Science and Technology Council (Taipei)", "grant_number": "111B3005191" }, { "agency": "National Natural Science Foundation of China", "grant_number": "12173003" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "11221206" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "ICN12_009" }, { "agency": "Agencia Nacional de Investigaci\u00f3n y Desarrollo (ANID)", "grant_number": "FB210003" }, { "agency": "National Research Council of Canada" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "National Science Foundation of China", "grant_number": "11973090" }, { "agency": "Agencia Estatal de Investigaci\u00f3n", "grant_number": "NCN2021_080" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1211656" }, { "agency": "European Research Council (ERC)", "grant_number": "864965" }, { "agency": "European Research Council (ERC)", "grant_number": "101039452" }, { "agency": "European Research Council (ERC)", "grant_number": "101002188" }, { "agency": "Gordon and Betty Moore Foundation", "grant_number": "GBMF8550" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51472.001-A" }, { "agency": "NASA", "grant_number": "NAS5-02105" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "W. M. Keck Foundation" }, { "agency": "Resnick Sustainability Institute" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Resnick-Sustainability-Institute" } ] }, "doi": "10.3847/1538-4357/acc843", "primary_object": { "basename": "Long_2023_ApJ_949_27.pdf", "url": "https://authors.library.caltech.edu/records/2b41a-r1s24/files/Long_2023_ApJ_949_27.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Long, Feng; Ren, Bin B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1xgrk-5wa48", "eprint_id": 121523, "eprint_status": "archive", "datestamp": "2023-08-22 20:33:56", "lastmod": "2023-10-20 15:31:19", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "name": { "family": "Kuzuhara", "given": "Masayuki" }, "orcid": "0000-0002-4677-9182" }, { "name": { "family": "Janson", "given": "Markus" }, "orcid": "0000-0001-8345-593X" }, { "name": { "family": "Kotani", "given": "Takayuki" }, "orcid": "0000-0001-6181-3142" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Sato", "given": "Bun'ei" }, "orcid": "0000-0001-8033-5633" }, { "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "name": { "family": "Ishikawa", "given": "Hiroyuki Tako" }, "orcid": "0000-0001-6309-4380" }, { "id": "Cale-Bryson-L", "name": { "family": "Cale", "given": "Bryson" }, "orcid": "0000-0001-6279-0595" }, { "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "name": { "family": "Harakawa", "given": "Hiroki" }, "orcid": "0000-0002-7972-0216" }, { "name": { "family": "Henning", "given": "Thomas" }, "orcid": "0000-0002-1493-300X" }, { "name": { "family": "Hirano", "given": "Teruyuki" }, "orcid": "0000-0003-3618-7535" }, { "name": { "family": "Hodapp", "given": "Klaus" }, "orcid": "0000-0003-0786-2140" }, { "name": { "family": "Hori", "given": "Yasunori" }, "orcid": "0000-0003-4676-0251" }, { "name": { "family": "Ishizuka", "given": "Masato" }, "orcid": "0000-0003-1906-4525" }, { "name": { "family": "Jacobson", "given": "Shane" }, "orcid": "0000-0003-1438-4124" }, { "name": { "family": "Kasagi", "given": "Yui" }, "orcid": "0000-0002-8607-358X" }, { "name": { "family": "Kokubo", "given": "Eiichiro" }, "orcid": "0000-0002-5486-7828" }, { "name": { "family": "Konishi", "given": "Mihoko" }, "orcid": "0000-0003-0114-0542" }, { "name": { "family": "Kudo", "given": "Tomoyuki" }, "orcid": "0000-0002-9294-1793" }, { "name": { "family": "Kurokawa", "given": "Takashi" } }, { "name": { "family": "Kusakabe", "given": "Nobuhiko" }, "orcid": "0000-0001-9194-1268" }, { "name": { "family": "Kwon", "given": "Jungmi" }, "orcid": "0000-0003-2815-7774" }, { "name": { "family": "Machida", "given": "Masahiro" }, "orcid": "0000-0002-0963-0872" }, { "name": { "family": "Nakagawa", "given": "Takao" }, "orcid": "0000-0002-6660-9375" }, { "name": { "family": "Narita", "given": "Norio" }, "orcid": "0000-0001-8511-2981" }, { "name": { "family": "Nishikawa", "given": "Jun" }, "orcid": "0000-0001-9326-8134" }, { "name": { "family": "Ogihara", "given": "Masahiro" }, "orcid": "0000-0002-8300-7990" }, { "name": { "family": "Omiya", "given": "Masashi" }, "orcid": "0000-0002-5051-6027" }, { "name": { "family": "Serizawa", "given": "Takuma" } }, { "name": { "family": "Ueda", "given": "Akitoshi" } }, { "name": { "family": "Vievard", "given": "S\u00e9bastien" }, "orcid": "0000-0003-4018-2569" }, { "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "Direct Imaging Explorations for Companions around Mid\u2013Late M Stars from the Subaru/IRD Strategic Program", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nThe authors would like to thank the anonymous referee for the constructive comments and suggestions to improve the quality of the paper. We are grateful to Tomas Stolker, who helped arrange the internal settings of species. T.U. is supported by a Grant-in-Aid for the Japan Society for the Promotion of Science (JSPS) Fellows and JSPS KAKENHI grant No. JP21J01220. M.T. is supported by JSPS KAKENHI grant Nos. 18H05442, 15H02063, and 22000005. T.H. is supported by JSPS KAKENHI grant Nos. 19K14783 and 21H00035. E.K. is supported by JSPS KAKENHI grant No. 18H05438. This research is partially supported by NASA ROSES XRP award 80NSSC19K0294, JSPS KAKENHI grant No. JP18H05439, and JST CREST grant No. JPMJCR1761. Some of the research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. \n\nParts of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this research is based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nThis work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of NASA's Astrophysics Data System Bibliographic Services. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. Our modeling of the distortion of the IRD-FIM camera used M5 images that benefited from observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute, the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA). \n\nSoftware: astropy (Astropy Collaboration et al. 2013, 2018).\n\nPublished - Uyama_2023_AJ_165_162.pdf
", "abstract": "The Subaru telescope is currently performing a strategic program (SSP) using the high-precision near-infrared (NIR) spectrometer IRD to search for exoplanets around nearby mid/late M dwarfs via radial velocity (RV) monitoring. As part of the observing strategy for the exoplanet survey, signatures of massive companions such as RV trends are used to reduce the priority of those stars. However, this RV information remains useful for studying the stellar multiplicity of nearby M dwarfs. To search for companions around such \"deprioritized\" M dwarfs, we observed 14 IRD-SSP targets using Keck/NIRC2 with pyramid wave-front sensing at NIR wavelengths, leading to high sensitivity to substellar-mass companions within a few arcseconds. We detected two new companions (LSPM J1002+1459 B and LSPM J2204+1505 B) and two new candidates that are likely companions (LSPM J0825+6902 B and LSPM J1645+0444 B), as well as one known companion. Including two known companions resolved by the IRD fiber injection module camera, we detected seven (four new) companions at projected separations between \u223c2 and 20 au in total. A comparison of the colors with the spectral library suggests that LSPM J2204+1505 B and LSPM J0825+6902 B are located at the boundary between late M and early L spectral types. Our deep high-contrast imaging for targets where no bright companions were resolved did not reveal any additional companion candidates. The NIRC2 detection limits could constrain potential substellar-mass companions (\u223c10\u201375 M_(Jup)) at 10 au or further. The failure with Keck/NIRC2 around the IRD-SSP stars having significant RV trends makes these objects promising targets for further RV monitoring or deeper imaging with the James Webb Space Telescope to search for smaller-mass companions below the NIRC2 detection limits.", "date": "2023-04", "date_type": "published", "publication": "Astronomical Journal", "volume": "165", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 162", "id_number": "CaltechAUTHORS:20230525-772162500.8", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230525-772162500.8", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP21J01220" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "18H05442" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "15H02063" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "22000005" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "19K14783" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "21H00035" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "18H05438" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP18H05439" }, { "agency": "Japan Science and Technology Agency", "grant_number": "JPMJCR1761" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" }, { "agency": "Gaia Multilateral Agreement" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/acbf37", "primary_object": { "basename": "Uyama_2023_AJ_165_162.pdf", "url": "https://authors.library.caltech.edu/records/1xgrk-5wa48/files/Uyama_2023_AJ_165_162.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Uyama, Taichi; Beichman, Charles; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/trvfa-ewn07", "eprint_id": 120002, "eprint_status": "archive", "datestamp": "2023-08-22 20:11:58", "lastmod": "2023-10-25 16:48:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Horstman-Katelyn", "name": { "family": "Horstman", "given": "Katelyn" }, "orcid": "0000-0001-9708-8667" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Rosenthal-Lee-J", "name": { "family": "Rosenthal", "given": "Lee J." }, "orcid": "0000-0001-8391-5182" }, { "id": "Batygin-K", "name": { "family": "Batygin", "given": "Konstantin" }, "orcid": "0000-0002-7094-7908" }, { "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Fulton-Benjamin-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "name": { "family": "Konopacky", "given": "Quinn M." }, "orcid": "0000-0002-9936-6285" }, { "id": "Agrawal-Shubh", "name": { "family": "Agrawal", "given": "Shubh" }, "orcid": "0000-0003-2429-5811" }, { "name": { "family": "Hirsch", "given": "Lea A." }, "orcid": "0000-0001-8058-7443" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Blunt-Sarah-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "name": { "family": "Nielsen", "given": "Eric" }, "orcid": "0000-0001-6975-9056" }, { "id": "Baker-Ashley-D", "name": { "family": "Baker", "given": "Ashley" }, "orcid": "0000-0002-6525-7013" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "name": { "family": "Finnerty", "given": "Luke" }, "orcid": "0000-0002-1392-0768" }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "name": { "family": "L\u00f3pez", "given": "Ronald" } }, { "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" }, "orcid": "0000-0002-6769-2035" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Sappey", "given": "Ben" }, "orcid": "0000-0003-1399-3593" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "name": { "family": "Venenciano", "given": "Taylor" }, "orcid": "0000-0003-0122-8915" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" } ] }, "title": "Detecting Exomoons from Radial Velocity Measurements of Self-luminous Planets: Application to Observations of HR 7672 B and Future Prospects", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nJ.-B.R. acknowledges support from the David and Ellen Lee Prize Postdoctoral Fellowship. \n\nFunding for KPIC has been provided by the California Institute of Technology, the Jet Propulsion Laboratory, the Heising-Simons Foundation through grants Nos. 2019-1312 and #2015-129, the Simons Foundation, and the United States National Science Foundation grant No. AST-1611623. \n\nJ.W. acknowledges support by the National Science Foundation under grant No. 2143400. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA. The Keck Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We also wish to recognize the very important cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacility: Keck II (KPIC). - \n\nSoftware: astropy 26 (Astropy Collaboration et al. 2013), Matplotlib 27 (Hunter 2007), PSIsim, 28 RVSearch 29 (Rosenthal et al. 2021), KPIC Data Reduction Pipeline 30 (Delorme et al. 2021), BREADS 31 (Agrawal 2022; Ruffio et al.2021).\n\nPublished - Ruffio_2023_AJ_165_113.pdf
", "abstract": "The detection of satellites around extrasolar planets, so called exomoons, remains a largely unexplored territory. In this work, we study the potential of detecting these elusive objects from radial velocity monitoring of self-luminous, directly imaged planets. This technique is now possible thanks to the development of dedicated instruments combining the power of high-resolution spectroscopy and high-contrast imaging. First, we demonstrate a sensitivity to satellites with a mass ratio of 1%\u20134% at separations similar to the Galilean moons from observations of a brown-dwarf companion (HR 7672 B; K_(mag) = 13; 0.\u20337 separation) with the Keck Planet Imager and Characterizer (R \u223c 35,000 in the K band) at the W. M. Keck Observatory. Current instrumentation is therefore already sensitive to large unresolved satellites that could be forming from gravitational instability akin to binary star formation. Using end-to-end simulations, we then estimate that future instruments such as the Multi-Object Diffraction-limited High-resolution Infrared Spectrograph, planned for the Thirty Meter Telescope, should be sensitive to satellites with mass ratios of \u223c10\u22124. Such small moons would likely form in a circumplanetary disk similar to the Jovian satellites in the solar system. Looking for the Rossiter\u2013McLaughlin effect could also be an interesting pathway to detecting the smallest moons on short orbital periods. Future exomoon discoveries will allow precise mass measurements of the substellar companions that they orbit and provide key insight into the formation of exoplanets. They would also help constrain the population of habitable Earth-sized moons orbiting gas giants in the habitable zone of their stars.", "date": "2023-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "165", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 113", "id_number": "CaltechAUTHORS:20230314-844891400.15", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230314-844891400.15", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Caltech/JPL" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-2143400" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/acb34a", "primary_object": { "basename": "Ruffio_2023_AJ_165_113.pdf", "url": "https://authors.library.caltech.edu/records/trvfa-ewn07/files/Ruffio_2023_AJ_165_113.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Ruffio, Jean-Baptiste; Horstman, Katelyn; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gh9hq-bqx27", "eprint_id": 120237, "eprint_status": "archive", "datestamp": "2023-08-22 18:55:18", "lastmod": "2023-10-18 15:56:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ren-Bin-B", "name": { "family": "Ren", "given": "Bin B." }, "orcid": "0000-0003-1698-9696" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" }, { "id": "Hurt-Spencer-A", "name": { "family": "Hurt", "given": "Spencer A." }, "orcid": "0000-0002-6903-9080" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Carter-Aarynn-L", "name": { "family": "Carter", "given": "Aarynn L." }, "orcid": "0000-0001-5365-4815" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Oppenheimer-Rebecca", "name": { "family": "Oppenheimer", "given": "Rebecca" }, "orcid": "0000-0001-7130-7681" }, { "id": "Aguilar-Jonathan", "name": { "family": "Aguilar", "given": "Jonathan" }, "orcid": "0000-0003-3184-0873" }, { "id": "Cady-Eric-J", "name": { "family": "Cady", "given": "Eric" }, "orcid": "0000-0002-8789-2931" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Planet search with the Keck/NIRC2 vortex coronagraph in the M\u209b band for Vega", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 The Authors 2023. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This article is published in open access under the Subscribe to Open model. Subscribe to A&A to support open access publication. \n\nWe thank the anonymous referee for their constructive comments that increased the clarity and reproducibility of this paper. This research is partially supported by NASA ROSES XRP, award 80NSSC19K0294. B.B.R. has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (PRO-TOPLANETS, grant agreement No. 101002188). \u00c9.C. has received funding from the European Research Council (ERC) under the European Union's Horizon Europe research and innovation programme (ESCAPE, grant agreement No 101044152). Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Part of the computations presented here was conducted in the Resnick High Performance Computing Center, a facility supported by Resnick Sustainability Institute at the California Institute of Technology.\n\nPublished - aa44485-22.pdf
", "abstract": "Context. Gaps in circumstellar disks can signal the existence of planetary perturbers, making such systems preferred targets for direct imaging observations of exoplanets. \n\nAims. Being one of the brightest and closest stars to the Sun, the photometric standard star Vega hosts a two-belt debris disk structure. Together with the fact that its planetary system is being viewed nearly face-on, Vega has been one of the prime targets for planet imaging efforts. \n\nMethods. Using the vector vortex coronagraph on Keck/NIRC2 in the M\u209b band at 4.67 \u03bcm, we report the planet detection limits from 1 au to 22 au for Vega with an on-target time of 1.8 h. \n\nResults. We reach a 3 M_(Jupiter) limit outward of 12 au, which is nearly an order of magnitude deeper than for other existing studies. Combining our observations with existing radial velocity studies, we can confidently rule out the existence of companions more than ~8 M_(Jupiter) from 22 au down to 0.1 au for Vega. Interior and exterior to ~4 au, this combined approach reaches planet detection limits down to ~2\u20133 M_(Jupiter) using radial velocity and direct imaging, respectively. \n\nConclusions. By reaching multi-Jupiter mass detection limits, our results are expected to be complemented by the planet imaging of Vega in the upcoming observations using the James Webb Space Telescope to obtain a more holistic understanding of the planetary system configuration around Vega.", "date": "2023-02", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "670", "publisher": "EDP Sciences", "pagerange": "Art. No. A162", "id_number": "CaltechAUTHORS:20230321-821389800.40", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230321-821389800.40", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "European Research Council (ERC)", "grant_number": "101002188" }, { "agency": "European Research Council (ERC)", "grant_number": "101044152" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Resnick-Sustainability-Institute" } ] }, "doi": "10.1051/0004-6361/202244485", "primary_object": { "basename": "aa44485-22.pdf", "url": "https://authors.library.caltech.edu/records/gh9hq-bqx27/files/aa44485-22.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Ren, Bin B.; Wallack, Nicole L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sm7k9-1qe15", "eprint_id": 120046, "eprint_status": "archive", "datestamp": "2023-08-22 18:40:33", "lastmod": "2023-10-25 16:50:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Middei-Riccardo", "name": { "family": "Middei", "given": "Riccardo" }, "orcid": "0000-0001-9815-9092" }, { "id": "Liodakis-Ioannis", "name": { "family": "Liodakis", "given": "Ioannis" }, "orcid": "0000-0001-9200-4006" }, { "id": "Perri-Matteo", "name": { "family": "Perri", 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"Maldera-Simone", "name": { "family": "Maldera", "given": "Simone" }, "orcid": "0000-0002-0698-4421" }, { "id": "Manfreda-Alberto", "name": { "family": "Manfreda", "given": "Alberto" }, "orcid": "0000-0002-0998-4953" }, { "id": "Marin-Fr\u00e9d\u00e9ric", "name": { "family": "Marin", "given": "Fr\u00e9d\u00e9ric" }, "orcid": "0000-0003-4952-0835" }, { "id": "Marinucci-Andrea", "name": { "family": "Marinucci", "given": "Andrea" }, "orcid": "0000-0002-2055-4946" }, { "id": "Massaro-Francesco", "name": { "family": "Massaro", "given": "Francesco" }, "orcid": "0000-0002-1704-9850" }, { "id": "Matt-Giorgio", "name": { "family": "Matt", "given": "Giorgio" }, "orcid": "0000-0002-2152-0916" }, { "id": "Mitsuishi-Ikuyuki", "name": { "family": "Mitsuishi", "given": "Ikuyuki" } }, { "id": "Ng-Stephen-Chi-Yung", "name": { "family": "Ng", "given": "C.-Y." }, "orcid": "0000-0002-5847-2612" }, { "id": "O'Dell-Stephen-L", "name": { "family": "O'Dell", "given": "Stephen L." }, "orcid": "0000-0002-1868-8056" }, { "id": "Oppedisano-Chiara", "name": { "family": "Oppedisano", "given": "Chiara" }, "orcid": "0000-0001-6194-4601" }, { "id": "Papitto-Alessandro", "name": { "family": "Papitto", "given": "Alessandro" }, "orcid": "0000-0001-6289-7413" }, { "id": "Pavlov-George-G", "name": { "family": "Pavlov", "given": "George G." }, "orcid": "0000-0002-7481-5259" }, { "id": "Peirson-Abel-L", "name": { "family": "Peirson", "given": "Abel L." }, "orcid": "0000-0001-6292-1911" }, { "id": "Pesce-Rollins-Melissa", "name": { "family": "Pesce-Rollins", "given": "Melissa" }, "orcid": "0000-0003-1790-8018" }, { "id": "Petrucci-Pierre-Olivier", "name": { "family": "Petrucci", "given": "Pierre-Olivier" }, "orcid": "0000-0001-6061-3480" }, { "id": "Pilia-Maura", "name": { "family": "Pilia", "given": "Maura" }, "orcid": "0000-0001-7397-8091" }, { "id": "Possenti-Andrea", "name": { "family": "Possenti", "given": "Andrea" }, "orcid": "0000-0001-5902-3731" }, { "id": "Ramsey-Brian-D", "name": { "family": "Ramsey", "given": "Brian D." } }, { "id": "Rankin-John", "name": { "family": "Rankin", "given": "John" }, "orcid": "0000-0002-9774-0560" }, { "id": "Ratheesh-Ajay", "name": { "family": "Ratheesh", "given": "Ajay" }, "orcid": "0000-0003-0411-4243" }, { "id": "Romani-Roger-W", "name": { "family": "Romani", "given": "Roger W." }, "orcid": "0000-0001-6711-3286" }, { "id": "Sgr\u00f3-Carmelo", "name": { "family": "Sgr\u00f3", "given": "Carmelo" }, "orcid": "0000-0001-5676-6214" }, { "id": "Slane-Patrick", "name": { "family": "Slane", "given": "Patrick" }, "orcid": "0000-0002-6986-6756" }, { "id": "Soffitta-Paolo", "name": { "family": "Soffitta", "given": "Paolo" }, "orcid": "0000-0001-8916-4156" }, { "id": "Spandre-Gloria", "name": { "family": "Spandre", "given": "Gloria" }, "orcid": "0000-0003-0802-3453" }, { "id": "Tamagawa-Toru", "name": { "family": "Tamagawa", "given": "Toru" }, "orcid": "0000-0002-8801-6263" }, { "id": "Taverna-Roberto", "name": { "family": "Taverna", "given": "Roberto" }, "orcid": "0000-0002-1768-618X" }, { "id": "Tawara-Yuzuru", "name": { "family": "Tawara", "given": "Yuzuru" } }, { "id": "Tennant-Allyn-F", "name": { "family": "Tennant", "given": "Allyn F." }, "orcid": "0000-0002-9443-6774" }, { "id": "Thomas-Nicholas-E", "name": { "family": "Thomas", "given": "Nicholas E." }, "orcid": "0000-0003-0411-4606" }, { "id": "Tombesi-Francesco", "name": { "family": "Tombesi", "given": "Francesco" }, "orcid": "0000-0002-6562-8654" }, { "id": "Trois-Alessio", "name": { "family": "Trois", "given": "Alessio" }, "orcid": "0000-0002-3180-6002" }, { "id": "Tsygankov-Sergey-S", "name": { "family": "Tsygankov", "given": "Sergey S." }, "orcid": "0000-0002-9679-0793" }, { "id": "Turolla-Roberto", "name": { "family": "Turolla", "given": "Roberto" }, "orcid": "0000-0003-3977-8760" }, { "id": "Vink-Jacco", "name": { "family": "Vink", "given": "Jacco" }, "orcid": "0000-0002-4708-4219" }, { "id": "Weisskopf-Martin-C", "name": { "family": "Weisskopf", "given": "Martin C." }, "orcid": "0000-0002-5270-4240" }, { "id": "Wu-Kinwah", "name": { "family": "Wu", "given": "Kinwah" }, "orcid": "0000-0002-7568-8765" }, { "id": "Xie-Fei", "name": { "family": "Xie", "given": "Fei" }, "orcid": "0000-0002-0105-5826" }, { "id": "Zane-Silvia", "name": { "family": "Zane", "given": "Silvia" }, "orcid": "0000-0001-5326-880X" } ] }, "title": "X-Ray Polarization Observations of BL Lacertae", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nWe thank the anonymous referee for their bright comments. The Imaging X-ray Polarimetry Explorer (IXPE) is a joint US and Italian mission. The US contribution is supported by the National Aeronautics and Space Administration (NASA) and led and managed by its Marshall Space Flight Center (MSFC), with industry partner Ball Aerospace (contract NNM15AA18C). The Italian contribution is supported by the Italian Space Agency (Agenzia Spaziale Italiana, ASI) through contract ASI-OHBI-2017-12-I.0, agreements ASI-INAF-2017-12-H0 and ASI-INFN-2017.13-H0, and its Space Science Data Center (SSDC), and by the Istituto Nazionale di Astrofisica (INAF) and the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. This research used data products provided by the IXPE Team (MSFC, SSDC, INAF, and INFN) and distributed with additional software tools by the High-Energy Astrophysics Science Archive Research Center (HEASARC), at NASA Goddard Space Flight Center (GSFC). We acknowledge financial support from ASI-INAF agreement n. 2022-14-HH.0. The research at Boston University was supported in part by National Science Foundation grant AST-2108622 and NASA Swift Guest Investigator grant 80NSSC22K0537. This research has made use of data from the RoboPol program, a collaboration between Caltech, the University of Crete, IA-FORTH, IUCAA, the MPIfR, and the Nicolaus Copernicus University, which was conducted at Skinakas Observatory in Crete, Greece. The IAA-CSIC coauthors acknowledge financial support from the Spanish \"Ministerio de Ciencia e Innovacion\" (MCINN) through the \"Center of Excellence Severo Ochoa\" award for the Instituto de Astrof\u00edsica de Andaluc\u00eda-CSIC (SEV-2017-0709). Acquisition and reduction of the POLAMI, TOP-MAPCAR, and OSN data was supported in part by MICINN through grants AYA2016-80889-P and PID2019-107847RB-C44. The POLAMI observations were carried out at the IRAM 30 m Telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain). This Letter makes use of the following ALMA director's discretionary time data under proposal ESO#2021.A.00016.T. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), MOST, and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. Some of the data reported here are based on observations obtained at the Hale Telescope, Palomar Observatory as part of a continuing collaboration between the California Institute of Technology, NASA/JPL, Yale University, and the National Astronomical Observatories of China. This research made use of Photutils, an Astropy package for detection and photometry of astronomical sources (Bradley et al. 2019). G.V.P. acknowledges support by NASA through the NASA Hubble Fellowship grant #HST-HF2-51444.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. The data in this study include observations made with the Nordic Optical Telescope, owned in collaboration by the University of Turku and Aarhus University, and operated jointly by Aarhus University, the University of Turku, and the University of Oslo, representing Denmark, Finland, and Norway, the University of Iceland and Stockholm University at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The data presented here were obtained in part with ALFOSC, which is provided by the Instituto de Astrof\u00edsica de Andaluc\u00eda (IAA) under a joint agreement with the University of Copenhagen and NOT. E.L. was supported by Academy of Finland projects 317636 and 320045. Part of the French contribution is supported by the Scientific Research National Center (CNRS) and the French Spatial Agency (CNES). Some of the data are based on observations collected at the Observatorio de Sierra Nevada, owned and operated by the Instituto de Astrof\u00edsica de Andaluc\u00eda (IAA-CSIC). Further data are based on observations collected at the Centro Astron\u00f3mico Hispano-Alem\u00e1n (CAHA), operated jointly by Junta de Andaluc\u00eda and Consejo Superior de Investigaciones Cient\u00edficas (IAA-CSIC). D.B., S.K., R.S., and N. M. acknowledge support from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program under grant agreement No. 771282. C.C. acknowledges support by the European Research Council (ERC) under the HORIZON ERC Grants 2021 program under grant agreement No. 101040021. The Dipol-2 polarimeter was built in cooperation by the University of Turku, Finland, and the Leibniz Institut f\u00fcr Sonnenphysik, Germany, with support from the Leibniz Association grant SAW-2011-KIS-7. We are grateful to the Institute for Astronomy, University of Hawaii, for the allocated observing time. A.H. acknowledges The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This work was supported by JST, the establishment of university fellowships toward the creation of science technology innovation; grant No. JPMJFS2129. This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI grant Nos. JP21H01137. This work was also partially supported by Optical and Near-Infrared Astronomy Inter-University Cooperation Program from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. We are grateful to the observation and operating members of Kanata Telescope. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. Maunakea, the location of the SMA, is a culturally important site for the indigenous Hawaiian people; we are privileged to study the cosmos from its summit. \n\nFacilities: ALMA - Atacama Large Millimeter Array, CAO:2.2m - Calar Alto Observatory's 2.2 meter Telescope, CrAO:0.7m - , Hale - Palomar Observatory's 5.1m Hale Telescope, IRAM:30m - Institute de Radioastronomie Millimetrique 30 meter telescope, IXPE - , Kanata - , LX-200 - , NOT - Nordic Optical Telescope, NuSTAR - The NuSTAR (Nuclear Spectroscopic Telescope Array) mission, OSN:0.9m - IAA-CSIC Observatorio de Sierra Nevada's 0.9m Telescope, OSN:1.5m - IAA-CSIC Observatorio de Sierra Nevada's 1.5m Telescope, Perkins - Lowell Observatory's 72in Perkins Telescope, Skinakas:1.3m - Skinakas Observatory 1.3 meter Telescope, SMA - SubMillimeter Array, Swift - Swift Gamma-Ray Burst Mission, TU:0.6m - , XMM-Newton. -\n\nPublished - Middei_2023_ApJL_942_L10.pdf
", "abstract": "Blazars are a class of jet-dominated active galactic nuclei with a typical double-humped spectral energy distribution. It is of common consensus that the synchrotron emission is responsible for the low frequency peak, while the origin of the high frequency hump is still debated. The analysis of X-rays and their polarization can provide a valuable tool to understand the physical mechanisms responsible for the origin of high-energy emission of blazars. We report the first observations of BL Lacertae (BL Lac) performed with the Imaging X-ray Polarimetry Explorer, from which an upper limit to the polarization degree \u03a0_X < 12.6% was found in the 2\u20138 keV band. We contemporaneously measured the polarization in radio, infrared, and optical wavelengths. Our multiwavelength polarization analysis disfavors a significant contribution of proton-synchrotron radiation to the X-ray emission at these epochs. Instead, it supports a leptonic origin for the X-ray emission in BL Lac.", "date": "2023-01-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "942", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L10", "id_number": "CaltechAUTHORS:20230314-846094500.79", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230314-846094500.79", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNM15AA18C" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-OHBI-2017-12-I.0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INAF-2017-12-H0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INFN-2017.13-H0" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "Istituto Nazionale di Fisica Nucleare (INFN)" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INAF-2022-14-HH.0" }, { "agency": "NSF", "grant_number": "AST-2108622" }, { "agency": "NASA", "grant_number": "80NSSC22K0537" }, { "agency": "Severo Ochoa", "grant_number": "SEV-2017-0709" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "AYA2016-80889-P" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "PID2019-107847RB-C44" }, { "agency": "Institut national des sciences de l'Univers (INSU)" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Max Planck Society" }, { "agency": "Instituto Geogr\u00e1fico Nacional (IGN)" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51444.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "Academy of Finland", "grant_number": "317636" }, { "agency": "Academy of Finland", "grant_number": "320045" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" }, { "agency": "European Research Council (ERC)", "grant_number": "771282" }, { "agency": "European Research Council (ERC)", "grant_number": "101040021" }, { "agency": "Leibniz Association", "grant_number": "SAW-2011-KIS-7" }, { "agency": "Japan Science and Technology Agency", "grant_number": "JPMJFS2129" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP21H01137" }, { "agency": "Ministry of Education, Culture, Sports, Science and Technology (MEXT)" }, { "agency": "Smithsonian Institution" }, { "agency": "Academia Sinica" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Space-Radiation-Laboratory" } ] }, "doi": "10.3847/2041-8213/aca281", "primary_object": { "basename": "Middei_2023_ApJL_942_L10.pdf", "url": "https://authors.library.caltech.edu/records/sm7k9-1qe15/files/Middei_2023_ApJL_942_L10.pdf" }, "resource_type": "article", "pub_year": "2023", "author_list": "Middei, Riccardo; Liodakis, Ioannis; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9fq4z-nbz76", "eprint_id": 118578, "eprint_status": "archive", "datestamp": "2023-08-22 18:34:35", "lastmod": "2023-10-24 23:24:48", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Blake-G-A", "name": { "family": "Blake", "given": "Geoffrey A." }, "orcid": "0000-0003-0787-1610" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Baker-Ashley", "name": { "family": "Baker", "given": "Ashley" }, "orcid": "0000-0002-6525-7013" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Calvin-Benjamin", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "name": { "family": "Finnerty", "given": "Luke" }, "orcid": "0000-0002-1392-0768" }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "name": { "family": "Lopez", "given": "Ronald" } }, { "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" }, "orcid": "0000-0002-6769-2035" }, { "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Sappey", "given": "Ben" }, "orcid": "0000-0003-1399-3593" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "name": { "family": "Venenciano", "given": "Taylor" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" }, { "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "name": { "family": "Roy", "given": "Arpita" }, "orcid": "0000-0001-8127-5775" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" } ] }, "title": "Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-resolution Data", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "This work is supported by the National Science Foundation under grant No. 2143400. We thank Andrew Youdin, Joan Najita, and Kaitlin Kratter for insightful discussions on gravitational instability versus pebble accretion. We thank the anonymous referee for constructive comments and suggestions that significantly improved the Paper.\n\nFunding for KPIC has been provided by the California Institute of Technology, the Jet Propulsion Laboratory, the Heising-Simons Foundation (grant Nos. 2015-129, 2017-318, and 2019-1312), the Simons Foundation (through the Caltech Center for Comparative Planetary Evolution), and NSF under grant AST-1611623.\n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nWe thank the Heising-Simons Foundation for supporting the workshop on combining high-resolution spectroscopy and high-contrast imaging for exoplanet characterization, where the idea originated on combining photometric data and spectral data of different resolutions.", "abstract": "The formation and evolution pathway for the directly imaged multiplanetary system HR 8799 remains mysterious. Accurate constraints on the chemical composition of the planetary atmosphere(s) are key to solving the mystery. We perform a detailed atmospheric retrieval on HR 8799 c to infer the chemical abundances and abundance ratios using a combination of photometric data along with low- and high-resolution spectroscopic data (R \u223c 20\u201335,000). We specifically retrieve [C/H], [O/H], and C/O and find them to be 0.55_(-0.39)^(+0.36), 0.47_(-0.32)^(+0.31), and 0.67_(-0.15)^(+0.12) at 68% confidence. The superstellar C and O abundances, yet a stellar C/O ratio, reveal a potential formation pathway for HR 8799 c. Planet c, and likely the other gas giant planets in the system, formed early on (likely within \u223c1 Myr), followed by further atmospheric enrichment in C and O through the accretion of solids beyond the CO ice line. The enrichment either preceded or took place during the early phase of the inward migration to the current planet locations.", "date": "2023-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "165", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 4", "id_number": "CaltechAUTHORS:20221221-398072700.2", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221221-398072700.2", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-2143400" }, { "agency": "Caltech" }, { "agency": "JPL" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" }, { "id": "Caltech-Center-for-Comparative-Planetary-Evolution" } ] }, "doi": "10.3847/1538-3881/ac9f19", "resource_type": "article", "pub_year": "2023", "author_list": "Wang, Ji; Wang, Jason J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/97wyn-daw30", "eprint_id": 119241, "eprint_status": "archive", "datestamp": "2023-08-22 18:20:57", "lastmod": "2023-10-24 23:52:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Shuai-Linling", "name": { "family": "Shuai", "given": "Linling" }, "orcid": "0000-0001-6773-6803" }, { "id": "Ren-Bin-B", "name": { "family": "Ren", "given": "Bin B." }, "orcid": "0000-0003-1698-9696" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "Zhou-Xingyu", "name": { "family": "Zhou", "given": "Xingyu" } }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "De-Rosa-Robert-J", "name": { "family": "de Rosa", "given": "Robert J." }, "orcid": "0000-0002-4918-0247" }, { "id": "Fang-Taotao", "name": { "family": "Fang", "given": "Taotao" }, "orcid": "0000-0002-2853-3808" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Stellar Flyby Analysis for Spiral Arm Hosts with Gaia DR3", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "We thank the anonymous referees who provided comments and made this paper more rigorous. We thank Myriam Benisty, Gregory Herczeg, Andrew Winter, Xuesong Wang, and Bo Zhang for useful discussions. T.F. and L.S. are supported by the National Key R&D Program of China No. 2017YFA0402600, and NSFC grant Nos. 11890692, 12133008, and 12221003. T.F. and L.S. acknowledge science research grants from the China Manned Space Project with No. CMS-CSST-2021-A04. This project has received funding from the European Research Council under the European Union's Horizon 2020 research and innovation program (PROTOPLANETS, grant agreement No. 101002188). R.D. acknowledges financial support provided by the Natural Sciences and Engineering Research Council of Canada through a Discovery Grant, as well as by the Alfred P. Sloan Foundation through a Sloan Research Fellowship. L.S., B.B.R., R.D., and X.Z. acknowledge the 2022 Protoplanetary Disks and Planet Formation summer school hosted at the China Center of Advanced Science and Technology (CCAST) for discussions.\n\nThe spiral arm gallery images are based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO program 0104.C-0157(B) for AB Aur, 099.C-0685(A) for AS 205, 098.C-0760(B) for CQ Tau, 0102.C-0453(A) for DR Tau, 097.C-0536(A) for DZ Cha, 1100.C-0481(Q) for EM* SR 21, 60.A-9800(S) for HD 34282, 1104.C-0415(A) for HD 34700, 096.C-0248(B) for HD 100453, 096.C-0248(B) for HD 100546, 099.C-0601(A) for HD 142527, 097.C-0902(A) for HD 143006, 098.C-0760(B) for LkHa 330, 60.A-9389(A) for MWC 758, 095.C-0273(A) for SAO 206462, 198.C-0209(F) for TWA 7, 1104.C-0415(G) for V599 Ori, 0102.C-0778(A) for V1247 Ori, 1100.C-0481(R) for Wa Oph 6, and 098.C-0486(A) for WW Cha.\n\nThis work has made use of data from the European Space Agency mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.", "abstract": "Scattered-light imaging studies have detected nearly two dozen spiral arm systems in circumstellar disks, yet the formation mechanisms for most of them are still under debate. Although existing studies can use motion measurements to distinguish leading mechanisms such as planet\u2013disk interaction and disk self-gravity, close-in stellar flybys can induce short-lived spirals and even excite arm-driving planets into highly eccentric orbits. With unprecedented stellar location and proper-motion measurements from Gaia Data Release 3 (DR3), here we study for known spiral arm systems their flyby history with their stellar neighbors by formulating an analytical on-sky flyby framework. For stellar neighbors currently located within 10 pc of the spiral hosts, we restrict the flyby time to within the past 10\u2074 yr and the flyby distance to within 10 times the disk extent in scattered light. Among a total of 12,570 neighbors that are identified in Gaia DR3 for 20 spiral systems, we do not identify credible flyby candidates for isolated systems. Our analysis suggests that a close-in recent flyby is not the dominant formation mechanism for isolated spiral systems in scattered light.", "date": "2022-12", "date_type": "published", "publication": "Astrophysical Journal Supplement Series", "volume": "263", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 31", "id_number": "CaltechAUTHORS:20230213-466109600.12", "issn": "0067-0049", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230213-466109600.12", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Key Research and Development Program of China", "grant_number": "2017YFA0402600" }, { "agency": "National Natural Science Foundation of China", "grant_number": "11890692" }, { "agency": "National Natural Science Foundation of China", "grant_number": "12133008" }, { "agency": "National Natural Science Foundation of China", "grant_number": "12221003" }, { "agency": "China Manned Space Project", "grant_number": "CMS-CSST-2021-A04" }, { "agency": "European Research Council (ERC)", "grant_number": "101002188" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "Alfred P. Sloan Foundation" }, { "agency": "Gaia Multilateral Agreement" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4365/ac98fd", "resource_type": "article", "pub_year": "2022", "author_list": "Shuai, Linling; Ren, Bin B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8k6yv-fwb07", "eprint_id": 117859, "eprint_status": "archive", "datestamp": "2023-08-22 18:18:31", "lastmod": "2023-10-24 22:41:28", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vissapragada-Shreyas", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Greklek-McKeon-Michael", "name": { "family": "Greklek-McKeon", "given": "Michael" }, "orcid": "0000-0002-0371-1647" }, { "id": "Oklop\u010di\u0107-Antonija", "name": { "family": "Oklop\u010di\u0107", "given": "Antonija" }, "orcid": "0000-0002-9584-6476" }, { "id": "Dai-Fei", "name": { "family": "Dai", "given": "Fei" }, "orcid": "0000-0002-8958-0683" }, { "id": "dos-Santos-Leonardo-A", "name": { "family": "dos Santos", "given": "Leonardo A." }, "orcid": "0000-0002-2248-3838" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Paragas-Kimberly", "name": { "family": "Paragas", "given": "Kimberly" }, "orcid": "0000-0003-0062-1168" }, { "id": "Spake-Jessica-J", "name": { "family": "Spake", "given": "Jessica J." }, "orcid": "0000-0002-5547-3775" }, { "id": "Tinyanont-Samaporn", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "We thank the Palomar Observatory telescope operators, support astronomers, and directorate for their support of this work, especially Tom Barlow, Andy Boden, Carolyn Heffner, Paul Nied, Joel Pearman, Kajse Peffer, and Kevin Rykoski. We also thank Aaron Bello-Arufe, Yayaati Chachan, Philipp Eigm\u00fcller, Akash Gupta, Julie Inglis, Shubham Kanodia, Katja Poppenhaeger, Hannah Wakeford, and Nicole Wallack for insightful conversations. We acknowledge the referees for thorough reports that improved the quality of this paper. S.V. is supported by an NSF Graduate Research Fellowship. H.A.K. acknowledges support from NSF CAREER grant 1555095. A.O. gratefully acknowledges support from the Dutch Research Council NWO Veni grant.", "abstract": "Transit surveys indicate that there is a deficit of Neptune-sized planets on close-in orbits. If this \"Neptune desert\" is entirely cleared out by atmospheric mass loss, then planets at its upper edge should only be marginally stable against photoevaporation, exhibiting strong outflow signatures in tracers like the metastable helium triplet. We test this hypothesis by carrying out a 12-night photometric survey of the metastable helium feature with Palomar/WIRC, targeting seven gas-giant planets orbiting K-type host stars. Eight nights of data are analyzed here for the first time along with reanalyses of four previously published data sets. We strongly detect helium absorption signals for WASP-69b, HAT-P-18b, and HAT-P-26b; tentatively detect signals for WASP-52b and NGTS-5b; and do not detect signals for WASP-177b and WASP-80b. We interpret these measured excess absorption signals using grids of Parker wind models to derive mass-loss rates, which are in good agreement with predictions from the hydrodynamical outflow code ATES for all planets except WASP-52b and WASP-80b, where our data suggest that the outflows are much smaller than predicted. Excluding these two planets, the outflows for the rest of the sample are consistent with a mean energy-limited outflow efficiency of \u03b5 = 0.41_(-0.13)^(+0.16). Even when we make the relatively conservative assumption that gas-giant planets experience energy-limited outflows at this efficiency for their entire lives, photoevaporation would still be too inefficient to carve the upper boundary of the Neptune desert. We conclude that this feature of the exoplanet population is a pristine tracer of giant planet formation and migration mechanisms.", "date": "2022-12", "date_type": "published", "publication": "Astronomical Journal", "volume": "164", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 234", "id_number": "CaltechAUTHORS:20221114-805047300.13", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221114-805047300.13", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship" }, { "agency": "NSF", "grant_number": "AST-1555095" }, { "agency": "Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ac92f2", "resource_type": "article", "pub_year": "2022", "author_list": "Vissapragada, Shreyas; Knutson, Heather A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/99bvb-e7812", "eprint_id": 118318, "eprint_status": "archive", "datestamp": "2023-08-22 18:14:08", "lastmod": "2023-10-24 23:17:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Liodakis-Ioannis", "name": { "family": "Liodakis", "given": "Ioannis" }, "orcid": "0000-0001-9200-4006" }, { "name": { "family": "Marscher", "given": "Alan P." }, "orcid": "0000-0001-7396-3332" }, { "name": { "family": "Agudo", "given": "Iv\u00e1n" }, "orcid": "0000-0002-3777-6182" }, { "name": { "family": "Berdyugin", "given": "Andrei V." }, "orcid": "0000-0002-9353-5164" }, { "name": { "family": "Bernardos", "given": "Maria I." }, "orcid": "0000-0001-8872-1168" }, { "name": { "family": "Bonnoli", "given": "Giacomo" }, "orcid": "0000-0003-2464-9077" }, { "name": { "family": "Borman", "given": "George A." } }, { "name": { "family": "Casadio", "given": "Carolina" }, "orcid": "0000-0003-1117-2863" }, { "name": { "family": "Casanova", "given": "V\u0131\u0301ctor" } }, { "name": { "family": "Cavazzuti", "given": "Elisabetta" }, "orcid": "0000-0001-7150-9638" }, { "name": { "family": "Rodriguez Cavero", "given": "Nicole" }, "orcid": "0000-0001-5256-0278" }, { "name": { "family": "Di Gesu", "given": "Laura" }, "orcid": "0000-0002-5614-5028" }, { "name": { "family": "Di Lalla", "given": "Niccol\u00f3" }, "orcid": "0000-0002-7574-1298" }, { "name": { "family": "Donnarumma", "given": "Immacolata" }, "orcid": "0000-0002-4700-4549" }, { "name": { "family": "Ehlert", "given": "Steven R." }, "orcid": "0000-0003-4420-2838" }, { "name": { "family": "Errando", "given": "Manel" }, "orcid": "0000-0002-1853-863X" }, { "name": { "family": "Escudero", "given": "Juan" }, "orcid": "0000-0002-4131-655X" }, { "name": { "family": "Garc\u0131\u0301a-Comas", "given": "Maya" }, "orcid": "0000-0003-2323-4486" }, { "name": { "family": "Ag\u0131\u0301s-Gonz\u00e1lez", "given": "Beatriz" }, "orcid": "0000-0001-7702-8931" }, { "name": { "family": "Husillos", "given": "C\u00e9sar" }, "orcid": "0000-0001-8286-5443" }, { "name": { "family": "Jormanainen", "given": "Jenni" }, "orcid": "0000-0003-4519-7751" }, { "name": { "family": "Jorstad", "given": "Svetlana G." }, "orcid": "0000-0001-6158-1708" }, { "name": { "family": "Kagitani", "given": "Masato" }, "orcid": "0000-0002-4115-7122" }, { "name": { "family": "Kopatskaya", "given": "Evgenia N." }, "orcid": "0000-0001-9518-337X" }, { "name": { "family": "Kravtsov", "given": "Vadim" }, "orcid": "0000-0002-7502-3173" }, { "name": { "family": "Krawczynski", "given": "Henric" }, "orcid": "0000-0002-1084-6507" }, { "name": { "family": "Lindfors", "given": "Elina" }, "orcid": "0000-0002-9155-6199" }, { "name": { "family": "Larionova", "given": "Elena G." }, "orcid": "0000-0002-2471-6500" }, { "name": { "family": "Madejski", "given": "Grzegorz M." } }, { "name": { "family": "Marin", "given": "Fr\u00e9d\u00e9ric" }, "orcid": "0000-0003-4952-0835" }, { "name": { "family": "Marchini", "given": "Alessandro" }, "orcid": "0000-0003-3779-6762" }, { "name": { "family": "Marshall", "given": "Herman L." }, "orcid": "0000-0002-6492-1293" }, { "name": { "family": "Morozova", "given": "Daria A." }, "orcid": "0000-0002-9407-7804" }, { "name": { "family": "Massaro", "given": "Francesco" }, "orcid": "0000-0002-1704-9850" }, { "id": "Masiero-Joseph-R", "name": { "family": "Masiero", "given": "Joseph R." }, "orcid": "0000-0003-2638-720X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Middei", "given": "Riccardo" }, "orcid": "0000-0001-9815-9092" }, { "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Myserlis", "given": "Ioannis" }, "orcid": "0000-0003-3025-9497" }, { "name": { "family": "Negro", "given": "Michela" }, "orcid": "0000-0002-6548-5622" }, { "name": { "family": "Nilsson", "given": "Kari" }, "orcid": "0000-0002-1445-8683" }, { "name": { "family": "O'Dell", "given": "Stephen L." }, "orcid": "0000-0002-1868-8056" }, { "name": { "family": "Omodei", "given": "Nicola" }, "orcid": "0000-0002-5448-7577" }, { "name": { "family": "Pacciani", "given": "Luigi" }, "orcid": "0000-0001-6897-5996" }, { "name": { "family": "Paggi", "given": "Alessandro" }, "orcid": "0000-0002-5646-2410" }, { "id": "Panopoulou-Georgia-V", "name": { "family": "Panopoulou", "given": "Georgia V." }, "orcid": "0000-0001-7482-5759" }, { "name": { "family": "Peirson", "given": "Abel L." }, "orcid": "0000-0001-6292-1911" }, { "name": { "family": "Perri", "given": "Matteo" }, "orcid": "0000-0003-3613-4409" }, { "name": { "family": "Petrucci", "given": "Pierre-Olivier" }, "orcid": "0000-0001-6061-3480" }, { "name": { "family": "Poutanen", "given": "Juri" }, "orcid": "0000-0002-0983-0049" }, { "name": { "family": "Puccetti", "given": "Simonetta" }, "orcid": "0000-0002-2734-7835" }, { "name": { "family": "Romani", "given": "Roger W." }, "orcid": "0000-0001-6711-3286" }, { "name": { "family": "Sakanoi", "given": "Takeshi" }, "orcid": "0000-0002-7146-9020" }, { "name": { "family": "Savchenko", "given": "Sergey S." }, "orcid": "0000-0003-4147-3851" }, { "name": { "family": "Sota", "given": "Alfredo" }, "orcid": "0000-0002-9404-6952" }, { "name": { "family": "Tavecchio", "given": "Fabrizio" }, "orcid": "0000-0003-0256-0995" }, { "name": { "family": "Tinyanont", "given": "Samaporn" } }, { "name": { "family": "Vasilyev", "given": "Andrey A." }, "orcid": "0000-0002-8293-0214" }, { "name": { "family": "Weaver", "given": "Zachary R." }, "orcid": "0000-0001-6314-0690" }, { "name": { "family": "Zhovtan", "given": "Alexey V." } }, { "name": { "family": "Antonelli", "given": "Lucio A." }, "orcid": "0000-0002-5037-9034" }, { "name": { "family": "Bachetti", "given": "Matteo" }, "orcid": "0000-0002-4576-9337" }, { "name": { "family": "Baldini", "given": "Luca" }, "orcid": "0000-0002-9785-7726" }, { "name": { "family": "Baumgartner", "given": "Wayne H." }, "orcid": "0000-0002-5106-0463" }, { "name": { "family": "Bellazzini", "given": "Ronaldo" }, "orcid": "0000-0002-2469-7063" }, { "name": { "family": "Bianchi", "given": "Stefano" }, "orcid": "0000-0002-4622-4240" }, { "name": { "family": "Bongiorno", "given": "Stephen D." }, "orcid": "0000-0002-0901-2097" }, { "name": { "family": "Bonino", "given": "Raffaella" }, "orcid": "0000-0002-4264-1215" }, { "name": { "family": "Brez", "given": "Alessandro" }, "orcid": "0000-0002-9460-1821" }, { "name": { "family": "Bucciantini", "given": "Niccol\u00f2" }, "orcid": "0000-0002-8848-1392" }, { "name": { "family": "Capitanio", "given": "Fiamma" }, "orcid": "0000-0002-6384-3027" }, { "name": { "family": "Castellano", "given": "Simone" }, "orcid": "0000-0003-1111-4292" }, { "name": { "family": "Ciprini", "given": "Stefano" }, "orcid": "0000-0002-0712-2479" }, { "name": { "family": "Costa", "given": "Enrico" }, "orcid": "0000-0003-4925-8523" }, { "name": { "family": "De Rosa", "given": "Alessandra" }, "orcid": "0000-0001-5668-6863" }, { "name": { "family": "Del Monte", "given": "Ettore" }, "orcid": "0000-0002-3013-6334" }, { "name": { "family": "Di Marco", "given": "Alessandro" }, "orcid": "0000-0003-0331-3259" }, { "name": { "family": "Doroshenko", "given": "Victor" }, "orcid": "0000-0001-8162-1105" }, { "name": { "family": "Dov\u010diak", "given": "Michal" }, "orcid": "0000-0003-0079-1239" }, { "name": { "family": "Enoto", "given": "Teruaki" }, "orcid": "0000-0003-1244-3100" }, { "name": { "family": "Evangelista", "given": "Yuri" }, "orcid": "0000-0001-6096-6710" }, { "name": { "family": "Fabiani", "given": "Sergio" }, "orcid": "0000-0003-1533-0283" }, { "name": { "family": "Ferrazzoli", "given": "Riccardo" }, "orcid": "0000-0003-1074-8605" }, { "id": "Garc\u00eda-Javier-A", "name": { "family": "Garc\u00eda", "given": "Javier A." }, "orcid": "0000-0003-3828-2448" }, { "name": { "family": "Gunji", "given": "Shuichi" }, "orcid": "0000-0002-5881-2445" }, { "name": { "family": "Hayashida", "given": "Kiyoshi" }, "orcid": "0000-0002-0110-6136" }, { "name": { "family": "Heyl", "given": "Jeremy" }, "orcid": "0000-0001-9739-367X" }, { "name": { "family": "Iwakiri", "given": "Wataru" }, "orcid": "0000-0002-0207-9010" }, { "name": { "family": "Karas", "given": "Vladimir" }, "orcid": "0000-0002-5760-0459" }, { "name": { "family": "Kitaguchi", "given": "Takao" } }, { "name": { "family": "Kolodziejczak", "given": "Jeffery J." }, "orcid": "0000-0002-0110-6136" }, { "name": { "family": "La Monaca", "given": "Fabio" }, "orcid": "0000-0001-8916-4156" }, { "name": { "family": "Latronico", "given": "Luca" }, "orcid": "0000-0002-0984-1856" }, { "name": { "family": "Maldera", "given": "Simone" }, "orcid": "0000-0002-0698-4421" }, { "name": { "family": "Manfreda", "given": "Alberto" }, "orcid": "0000-0002-0998-4953" }, { "name": { "family": "Marinucci", "given": "Andrea" }, "orcid": "0000-0002-2055-4946" }, { "name": { "family": "Matt", "given": "Giorgio" }, "orcid": "0000-0002-2152-0916" }, { "name": { "family": "Mitsuishi", "given": "Ikuyuki" } }, { "name": { "family": "Mizuno", "given": "Tsunefumi" }, "orcid": "0000-0001-7263-0296" }, { "name": { "family": "Muleri", "given": "Fabio" }, "orcid": "0000-0003-3331-3794" }, { "name": { "family": "Ng", "given": "Stephen C.-Y." }, "orcid": "0000-0002-5847-2612" }, { "name": { "family": "Oppedisano", "given": "Chiara" }, "orcid": "0000-0001-6194-4601" }, { "name": { "family": "Papitto", "given": "Alessandro" }, "orcid": "0000-0001-6289-7413" }, { "name": { "family": "Pavlov", "given": "George G." }, "orcid": "0000-0002-7481-5259" }, { "name": { "family": "Pesce-Rollins", "given": "Melissa" }, "orcid": "0000-0003-1790-8018" }, { "name": { "family": "Pilia", "given": "Maura" }, "orcid": "0000-0001-7397-8091" }, { "name": { "family": "Possenti", "given": "Andrea" }, "orcid": "0000-0001-5902-3731" }, { "name": { "family": "Ramsey", "given": "Brian D." }, "orcid": "0000-0003-1548-1524" }, { "name": { "family": "Rankin", "given": "John" }, "orcid": "0000-0002-9774-0560" }, { "name": { "family": "Ratheesh", "given": "Ajay" }, "orcid": "0000-0003-0411-4243" }, { "name": { "family": "Sgr\u00f3", "given": "Carmelo" }, "orcid": "0000-0001-5676-6214" }, { "name": { "family": "Slane", "given": "Patrick" }, "orcid": "0000-0002-6986-6756" }, { "name": { "family": "Soffitta", "given": "Paolo" }, "orcid": "0000-0002-7781-4104" }, { "name": { "family": "Spandre", "given": "Gloria" }, "orcid": "0000-0003-0802-3453" }, { "name": { "family": "Tamagawa", "given": "Toru" }, "orcid": "0000-0002-8801-6263" }, { "name": { "family": "Taverna", "given": "Roberto" }, "orcid": "0000-0002-1768-618X" }, { "name": { "family": "Tawara", "given": "Yuzuru" } }, { "name": { "family": "Tennant", "given": "Allyn F." }, "orcid": "0000-0002-9443-6774" }, { "name": { "family": "Thomas", "given": "Nicolas E." } }, { "name": { "family": "Tombesi", "given": "Francesco" }, "orcid": "0000-0002-6562-8654" }, { "name": { "family": "Trois", "given": "Alessio" }, "orcid": "0000-0002-3180-6002" }, { "name": { "family": "Tsygankov", "given": "Sergey" }, "orcid": "0000-0002-9679-0793" }, { "name": { "family": "Turolla", "given": "Roberto" }, "orcid": "0000-0003-3977-8760" }, { "name": { "family": "Vink", "given": "Jacco" }, "orcid": "0000-0002-4708-4219" }, { "name": { "family": "Weisskopf", "given": "Martin C." }, "orcid": "0000-0002-5270-4240" }, { "name": { "family": "Wu", "given": "Kinwah" }, "orcid": "0000-0002-7568-8765" }, { "name": { "family": "Xie", "given": "Fei" }, "orcid": "0000-0002-0105-5826" }, { "name": { "family": "Zane", "given": "Silvia" }, "orcid": "0000-0001-5326-880X" } ] }, "title": "Polarized blazar X-rays imply particle acceleration in shocks", "ispublished": "pub", "full_text_status": "public", "keywords": "Multidisciplinary", "note": "I.L. thanks the Kavli Institute for the Physics and Mathematics of the Universe for their hospitality while this paper was written. We thank A. Veledina for discussions that helped improve this work. I.L. was supported by the JSPS postdoctoral short-term fellowship programme. The Imaging X-ray Polarimetry Explorer (IXPE) is a joint US and Italian mission. The US contribution is supported by the National Aeronautics and Space Administration (NASA) and led and managed by its Marshall Space Flight Center (MSFC), with industry partner Ball Aerospace (contract NNM15AA18C). The Italian contribution is supported by the Italian Space Agency (Agenzia Spaziale Italiana, ASI) through contract ASI-OHBI-2017-12-I.0, agreements ASI-INAF-2017-12-H0 and ASI-INFN-2017.13-H0, and its Space Science Data Center (SSDC) with agreements ASI-INAF-2022-14-HH.0 and ASI-INFN 2021-43-HH.0, and by the Istituto Nazionale di Astrofisica (INAF) and the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. This research used data products provided by the IXPE Team (MSFC, SSDC, INAF and INFN) and distributed with additional software tools by the High-Energy Astrophysics Science Archive Research Center (HEASARC), at NASA Goddard Space Flight Center (GSFC). Data from the Steward Observatory spectropolarimetric monitoring project were used. This programme is supported by Fermi Guest Investigator grants NNX08AW56G, NNX09AU10G, NNX12AO93G and NNX15AU81G. This research has made use of data from the RoboPol programme, a collaboration between Caltech, the University of Crete, the Institute of Astrophysics-Foundation for Research and Technology (IA-FORTH), the Inter-University Centre for Astronomy and Astrophysics (IUCAA), the Max Planck Institute for Radioastronomy (MPIfR) and the Nicolaus Copernicus University, which was conducted at Skinakas Observatory in Crete, Greece. The Instituto Astrof\u00edsica Andaluc\u00eda (IAA)-Consejo Superior de Investigaciones Cient\u00edficas (CSIC) co-authors acknowledge financial support from the Spanish Ministerio de Ciencia e Innovacion (MCINN) through the 'Center of Excellence Severo Ochoa' award for the Instituto de Astrofisica de Andalucia-CSIC (SEV-2017-0709). Acquisition and reduction of the POLAMI and Monitoring AGN with Polarimetry at the Calar Alto Telescopes (MAPCAT) data were supported in part by Ministerio de Ciencia e Innovaci\u00f3n (MICINN) through grants AYA2016-80889-P and PID2019-107847RB-C44. The POLAMI observations were carried out at the IRAM 30\u2009m Telescope. IRAM is supported by the National Institute of Sciences of the Universe (INSU)/Scientific Research National Center (CNRS) (France), Max-Planck-Gesellschaft (MPG) (Germany) and Instituto Geogr\u00e1fico Nacional (IGN) (Spain). The research at Boston University was supported in part by National Science Foundation grant AST-2108622, NASA Fermi Guest Investigator grant 80NSSC21K1917 and NASA Swift Guest Investigator grant 80NSSC22K0537. This study uses observations conducted with the 1.8\u2009m Perkins Telescope Observatory in Arizona (USA), which is owned and operated by Boston University. Based on observations obtained at the Hale Telescope, Palomar Observatory as part of a continuing collaboration between the California Institute of Technology, NASA/Jet Propulsion Laboratory (JPL), Yale University and the National Astronomical Observatories of China. This research made use of Photutils, an Astropy package for detection and photometry of astronomical sources60. G.V.P. acknowledges support by NASA through the NASA Hubble Fellowship grant no. HST-HF2-51444.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. Based on observations made with the Nordic Optical Telescope, owned in collaboration by the University of Turku and Aarhus University, and operated jointly by Aarhus University, the University of Turku and the University of Oslo, representing Denmark, Finland and Norway, the University of Iceland and Stockholm University at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The data presented here were obtained (in part) with ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and the Nordic Optical Telescope. V.K. thanks the Vilho, Yrj\u00f6 and Kalle V\u00e4is\u00e4l\u00e4 Foundation. J.J. was supported by Academy of Finland project 320085. E.L. was supported by Academy of Finland projects 317636 and 320045. Part of the French contribution was supported by the CNRS and the French spatial agency (CNES). Based on observations collected at the Observatorio de Sierra Nevada, owned and operated by the Instituto de Astrofisica de Andalucia (IAA-CSIC). Based on observations collected at the Centro Astronomico Hispano-Aleman (CAHA), proposal 22A-2.2-015, operated jointly by Junta de Andalucia and Consejo Superior de Investigaciones Cientificas (IAA-CSIC).\n\nOpen access funding provided by University of Turku (UTU) including Turku University Central Hospital.", "abstract": "Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to around 1\u2009TeV. Although the jets are known to be ultimately powered by a supermassive black hole, how the particles are accelerated to such high energies has been an unanswered question. The process must be related to the magnetic field, which can be probed by observations of the polarization of light from the jets. Measurements of the radio to optical polarization\u2014the only range available until now\u2014probe extended regions of the jet containing particles that left the acceleration site days to years earlier, and hence do not directly explore the acceleration mechanism, as could X-ray measurements. Here we report the detection of X-ray polarization from the blazar Markarian 501 (Mrk 501). We measure an X-ray linear polarization degree \u03a0X of around 10%, which is a factor of around 2 higher than the value at optical wavelengths, with a polarization angle parallel to the radio jet. This points to a shock front as the source of particle acceleration and also implies that the plasma becomes increasingly turbulent with distance from the shock.", "date": "2022-11-24", "date_type": "published", "publication": "Nature", "volume": "611", "number": "7937", "publisher": "Nature Publishing Group", "pagerange": "677-681", "id_number": "CaltechAUTHORS:20221212-796684400.32", "issn": "0028-0836", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221212-796684400.32", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)" }, { "agency": "NASA", "grant_number": "NNM15AA18C" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-OHBI-2017-12-I.0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INAF-2017-12-H0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INFN-2017.13-H0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INAF-2022-14-HH.0" }, { "agency": "Agenzia Spaziale Italiana (ASI)", "grant_number": "ASI-INFN 2021-43-HH.0" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "Istituto Nazionale di Fisica Nucleare (INFN)" }, { "agency": "NASA", "grant_number": "NNX08AW56G" }, { "agency": "NASA", "grant_number": "NNX09AU10G" }, { "agency": "NASA", "grant_number": "NNX12AO93G" }, { "agency": "NASA", "grant_number": "NNX15AU81G" }, { "agency": "Severo Ochoa", "grant_number": "SEV-2017-0709" }, { "agency": "Ministerio de Econom\u00eda y Competitividad (MINECO)", "grant_number": "AYA2016-80889-P" }, { "agency": "Ministerio de Ciencia e Innovaci\u00f3n (MICINN)", "grant_number": "PID2019-107847RB-C44" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Max-Planck-Gesellschaft (MPG)" }, { "agency": "Instituto Geogr\u00e1fico Nacional (IGN)" }, { "agency": "NSF", "grant_number": "AST-2108622" }, { "agency": "NASA", "grant_number": "80NSSC21K1917" }, { "agency": "NASA", "grant_number": "80NSSC22K0537" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51444.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "Vilho Foundation" }, { "agency": "Yrj\u00f6 Foundation" }, { "agency": "Kalle V\u00e4is\u00e4l\u00e4 Foundation" }, { "agency": "Academy of Finland", "grant_number": "320085" }, { "agency": "Academy of Finland", "grant_number": "317636" }, { "agency": "Academy of Finland", "grant_number": "320045" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" }, { "agency": "University of Turku" }, { "agency": "Turku University Central Hospital" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Space-Radiation-Laboratory" } ] }, "doi": "10.1038/s41586-022-05338-0", "pmcid": "PMC9684068", "resource_type": "article", "pub_year": "2022", "author_list": "Liodakis, Ioannis; Marscher, Alan P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/en1m0-7gh62", "eprint_id": 117657, "eprint_status": "archive", "datestamp": "2023-08-22 17:57:35", "lastmod": "2023-10-24 22:37:03", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xin-Yinzi", "name": { "family": "Xin", "given": "Yinzi" }, "orcid": "0000-0002-6171-9081" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Fitzgerald-Michael-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Lin-Jonathan", "name": { "family": "Lin", "given": "Jonathan" }, "orcid": "0000-0001-8542-3317" }, { "id": "Leon-Saval-Sergio", "name": { "family": "Leon-Saval", "given": "Sergio" }, "orcid": "0000-0002-5606-3874" }, { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Kim-Yoo-Jung", "name": { "family": "Kim", "given": "Yoo Jung" }, "orcid": "0000-0003-1392-0845" }, { "id": "Norris-Barnaby-R-M", "name": { "family": "Norris", "given": "Barnaby" }, "orcid": "0000-0002-8352-7515" }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Steph" }, "orcid": "0000-0001-6871-6775" } ] }, "title": "Efficient Detection and Characterization of Exoplanets within the Diffraction Limit: Nulling with a Mode-selective Photonic Lantern", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "We thank the anonymous reviewer for their careful consideration and feedback. This work is supported in part by the National Science Foundation Graduate Research Fellowship under grant No. 1122374. Additional effort has been supported by the National Science Foundation under grant No. 2109231. This research was carried out in part at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - Xin_2022_ApJ_938_140.pdf
", "abstract": "Coronagraphs allow for faint off-axis exoplanets to be observed, but are limited to angular separations greater than a few beam widths. Accessing closer-in separations would greatly increase the expected number of detectable planets, which scales inversely with the inner working angle. The vortex fiber nuller (VFN) is an instrument concept designed to characterize exoplanets within a single beam width. It requires few optical elements and is compatible with many coronagraph designs as a complementary characterization tool. However, the peak throughput for planet light is limited to about 20%, and the measurement places poor constraints on the planet location and flux ratio. We propose to augment the VFN design by replacing its single-mode fiber with a six-port mode-selective photonic lantern, retaining the original functionality while providing several additional ports that reject starlight but couple planet light. We show that the photonic lantern can also be used as a nuller without a vortex. We present monochromatic simulations characterizing the response of the photonic lantern nuller (PLN) to astrophysical signals and wavefront errors, and show that combining exoplanet flux from the nulled ports significantly increases the overall throughput of the instrument. We show using synthetically generated data that the PLN detects exoplanets more effectively than the VFN. Furthermore, with the PLN, the exoplanet can be partially localized, and its flux ratio constrained. The PLN has the potential to be a powerful characterization tool complementary to traditional coronagraphs in future high-contrast instruments.", "date": "2022-10-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "938", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 140", "id_number": "CaltechAUTHORS:20221031-575177800.19", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221031-575177800.19", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1122374" }, { "agency": "NSF", "grant_number": "AST-2109231" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ac9284", "primary_object": { "basename": "Xin_2022_ApJ_938_140.pdf", "url": "https://authors.library.caltech.edu/records/en1m0-7gh62/files/Xin_2022_ApJ_938_140.pdf" }, "resource_type": "article", "pub_year": "2022", "author_list": "Xin, Yinzi; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2z4ra-3c148", "eprint_id": 117302, "eprint_status": "archive", "datestamp": "2023-08-22 17:53:23", "lastmod": "2023-10-24 22:28:43", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Molli\u00e8re", "given": "Paul" }, "orcid": "0000-0003-4096-7067" }, { "name": { "family": "Kolecki", "given": "Jared" }, "orcid": "0000-0002-6267-0849" }, { "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "name": { "family": "Mukherjee", "given": "Sagnick" } }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Baker-Ashley", "name": { "family": "Baker", "given": "Ashley" }, "orcid": "0000-0002-6525-7013" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Blake-G-A", "name": { "family": "Blake", "given": "Geoffrey A." }, "orcid": "0000-0003-0787-1610" }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "id": "Calvin-Benjamin", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "name": { "family": "Chun", "given": "Mark" }, "orcid": "0000-0002-8462-0703" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "name": { "family": "Finnerty", "given": "Luke" }, "orcid": "0000-0002-1392-0768" }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Horstman-Katelyn", "name": { "family": "Horstman", "given": "Katelyn" }, "orcid": "0000-0001-9708-8667" }, { "id": "Inglis-Julie", "name": { "family": "Inglis", "given": "Julie" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "name": { "family": "L\u00f3pez", "given": "Ronald" } }, { "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" }, "orcid": "0000-0002-6769-2035" }, { "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Sappey", "given": "Ben" } }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "name": { "family": "Venenciano", "given": "Taylor" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "A Clear View of a Cloudy Brown Dwarf Companion from High-resolution Spectroscopy", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research has benefitted from the SpeX Prism Library maintained by Adam Burgasser at http://www.browndwarfs.org/spexprism. Funding for KPIC has been provided by the California Institute of Technology, the Jet Propulsion Laboratory, the Heising-Simons Foundation, the Simons Foundation, and the United States National Science Foundation grant No. AST-1611623. A.V. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program, grant agreement Nos. 757561 (HiRISE). H.A.K. acknowledges support from the President's and Director's Research & Development Fund Program, which is jointly funded by the Jet Propulsion Laboratory and the California Institute of Technology under a contract with the National Aeronautics and Space Administration. The computations presented here were conducted in the Resnick High Performance Center, a facility supported by Resnick Sustainability Institute at the California Institute of Technology.", "abstract": "Direct imaging studies have mainly used low-resolution spectroscopy (R \u223c 20\u2013100) to study the atmospheres of giant exoplanets and brown dwarf companions, but the presence of clouds has often led to degeneracies in the retrieved atmospheric abundances (e.g., carbon-to-oxygen ratio, metallicity). This precludes clear insights into the formation mechanisms of these companions. The Keck Planet Imager and Characterizer (KPIC) uses adaptive optics and single-mode fibers to transport light into NIRSPEC (R \u223c 35,000 in the K band), and aims to address these challenges with high-resolution spectroscopy. Using an atmospheric retrieval framework based on petitRADTRANS, we analyze the KPIC high-resolution spectrum (2.29\u20132.49 \u03bcm) and the archival low-resolution spectrum (1\u20132.2 \u03bcm) of the benchmark brown dwarf HD 4747 B (m = 67.2 \u00b1 1.8 M_(Jup), a = 10.0 \u00b1 0.2 au, T_(eff) \u2248 1400 K). We find that our measured C/O and metallicity for the companion from the KPIC high-resolution spectrum agree with those of its host star within 1\u03c3\u20132\u03c3. The retrieved parameters from the K-band high-resolution spectrum are also independent of our choice of cloud model. In contrast, the retrieved parameters from the low-resolution spectrum are highly sensitive to our chosen cloud model. Finally, we detect CO, H\u2082O, and CH\u2084 (volume-mixing ratio of log(CH\u2084) = \u22124.82 \u00b1 0.23) in this L/T transition companion with the KPIC data. The relative molecular abundances allow us to constrain the degree of chemical disequilibrium in the atmosphere of HD 4747 B, and infer a vertical diffusion coefficient that is at the upper limit predicted from mixing length theory.", "date": "2022-10-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "937", "number": "2", "publisher": "American Astronomical Society", "pagerange": "54Art. No.", "id_number": "CaltechAUTHORS:20221010-454096500.18", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221010-454096500.18", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "European Research Council (ERC)", "grant_number": "757561" }, { "agency": "JPL President and Director's Fund" }, { "agency": "Resnick Sustainability Institute" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Resnick-Sustainability-Institute" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-4357/ac8673", "resource_type": "article", "pub_year": "2022", "author_list": "Xuan, Jerry W.; Wang, Jason; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bbb46-79602", "eprint_id": 117654, "eprint_status": "archive", "datestamp": "2023-08-22 17:44:49", "lastmod": "2023-10-23 20:17:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Shen-Boqiang", "name": { "family": "Shen", "given": "Boqiang" }, "orcid": "0000-0003-0697-508X" }, { "id": "Gao-Maodong", "name": { "family": "Gao", "given": "Maodong" }, "orcid": "0000-0002-7791-0008" }, { "id": "Cvetojevic-Nick", "name": { "family": "Cvetojevic", "given": "Nick" }, "orcid": "0000-0002-7465-4176" }, { "id": "\u0141awniczuk-Katarzyna", "name": { "family": "\u0141awniczuk", "given": "Katarzyna" } }, { "id": "Broeke-Ronald", "name": { "family": "Broeke", "given": "Ronald" } }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Leifer-Stephanie-D", "name": { "family": "Leifer", "given": "Stephanie" }, "orcid": "0000-0002-8980-7825" }, { "id": "Jewell-Jeffery", "name": { "family": "Jewell", "given": "Jeffery" } }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Flattening laser frequency comb spectra with a high dynamic range, broadband spectral shaper on-a-chip", "ispublished": "pub", "full_text_status": "public", "keywords": "Atomic and Molecular Physics, and Optics", "note": "Keck Institute for Space Studies; European Research Council (grant agreement CoG - 683029); National Aeronautics and Space Administration (80NM0018D0004, HST-HF2-51478.001-A, NAS5-26555); David and Ellen Lee Postdoctoral Fellowship at the California Institute of Technology. \n\nThis work was produced with support from the Keck Institute for Space Studies. N. Cvetojevic acknowledges the funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement CoG - 683029). P. Gatkine is supported by NASA through the NASA Hubble Fellowship grant HST-HF2-51478.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Gatkine also acknowledges the support from David and Ellen Lee Postdoctoral Fellowship at the California Institute of Technology. Some of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).\n\nPublished - oe-30-20-36745.pdf
", "abstract": "Spectral shaping is critical to many fields of science. In astronomy for example, the detection of exoplanets via the Doppler effect hinges on the ability to calibrate a high resolution spectrograph. Laser frequency combs can be used for this, but the wildly varying intensity across the spectrum can make it impossible to optimally utilize the entire comb, leading to a reduced overall precision of calibration. To circumvent this, astronomical applications of laser frequency combs rely on a bulk optic setup which can flatten the output spectrum before sending it to the spectrograph. Such flatteners require complex and expensive optical elements like spatial light modulators and have non-negligible bench top footprints. Here we present an alternative in the form of an all-photonic spectral shaper that can be used to flatten the spectrum of a laser frequency comb. The device consists of a circuit etched into a silicon nitride wafer that supports an arrayed-waveguide grating to disperse the light over hundreds of nanometers in wavelength, followed by Mach-Zehnder interferometers to control the amplitude of each channel, thermo-optic phase modulators to phase the channels and a second arrayed-waveguide grating to recombine the spectrum. The demonstrator device operates from 1400 to 1800 nm (covering the astronomical H band), with twenty 20 nm wide channels. The device allows for nearly 40 dBs of dynamic modulation of the spectrum via the Mach-Zehnders , which is greater than that offered by most spatial light modulators. With a smooth spectrum light source (superluminescent diode), we reduced the static spectral variation to \u223c3 dB, limited by the properties of the components used in the circuit. On a laser frequency comb which had strong spectral modulations, and some at high spatial frequencies, we nevertheless managed to reduce the modulation to \u223c5 dBs, sufficient for astronomical applications. The size of the device is of the order of a US quarter, significantly cheaper than their bulk optic counter parts and will be beneficial to any area of science that requires spectral shaping over a broad range, with high dynamic range, including exoplanet detection.", "date": "2022-09-26", "date_type": "published", "publication": "Optics Express", "volume": "30", "number": "20", "publisher": "Optical Society of America", "pagerange": "36745", "id_number": "CaltechAUTHORS:20221031-575177800.13", "issn": "1094-4087", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221031-575177800.13", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Keck Institute for Space Studies (KISS)" }, { "agency": "European Research Council (ERC)", "grant_number": "683029" }, { "agency": "NASA", "grant_number": "80NM0018D0004" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51478.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "David and Lucile Packard Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Keck-Institute-for-Space-Studies" } ] }, "doi": "10.1364/oe.470143", "primary_object": { "basename": "oe-30-20-36745.pdf", "url": "https://authors.library.caltech.edu/records/bbb46-79602/files/oe-30-20-36745.pdf" }, "resource_type": "article", "pub_year": "2022", "author_list": "Jovanovic, Nemanja; Gatkine, Pradip; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z1fke-hs543", "eprint_id": 117220, "eprint_status": "archive", "datestamp": "2023-08-22 17:33:39", "lastmod": "2023-10-24 22:26:48", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hinkley-Sasha", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "name": { "family": "Carter", "given": "Aarynn L." }, "orcid": "0000-0001-5365-4815" }, { "name": { "family": "Ray", "given": "Shrishmoy" }, "orcid": "0000-0003-2259-3911" }, { "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "name": { "family": "Biller", "given": "Beth" }, "orcid": "0000-0003-4614-7035" }, { "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Sallum", "given": "Stephanie" } }, { "name": { "family": "Miles", "given": "Brittany" }, "orcid": "0000-0002-5500-4602" }, { "name": { "family": "Whiteford", "given": "Niall" } }, { "name": { "family": "Patapis", "given": "Polychronis" }, "orcid": "0000-0001-8718-3732" }, { "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" }, { "id": "Stapelfeldt-Karl-R", "name": { "family": "Stapelfeldt", "given": "Karl R." }, "orcid": "0000-0002-2805-7338" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "name": { "family": "Ward-Duong", "given": "Kimberly" }, "orcid": "0000-0002-4479-8291" }, { "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "name": { "family": "H. Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "name": { "family": "Hines", "given": "Dean" }, "orcid": "0000-0003-4653-6161" }, { "name": { "family": "Kalas", "given": "Paul" }, "orcid": "0000-0002-6221-5360" }, { "name": { "family": "Kammerer", "given": "Jens" }, "orcid": "0000-0003-2769-0438" }, { "name": { "family": "Kervella", "given": "Pierre" }, "orcid": "0000-0003-0626-1749" }, { "name": { "family": "Leisenring", "given": "Jarron" }, "orcid": "0000-0002-0834-6140" }, { "name": { "family": "Pantin", "given": "\u00c9ric" }, "orcid": "0000-0001-6472-2844" }, { "name": { "family": "Zhou", "given": "Yifan" }, "orcid": "0000-0003-2969-6040" }, { "name": { "family": "Meyer", "given": "Michael" }, "orcid": "0000-0003-2232-7664" }, { "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-0241-8956" }, { "name": { "family": "Bonnefoy", "given": "Micka\u00ebl" }, "orcid": "0000-0001-5579-5339" }, { "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "name": { "family": "McElwain", "given": "Michael" }, "orcid": "0000-0003-0241-8956" }, { "name": { "family": "Metchev", "given": "Stanimir" }, "orcid": "0000-0003-3050-8203" }, { "name": { "family": "Wyatt", "given": "Mark" }, "orcid": "0000-0001-9064-5598" }, { "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "name": { "family": "Adams", "given": "Jea" }, "orcid": "0000-0002-4489-3168" }, { "name": { "family": "Barman", "given": "Travis" }, "orcid": "0000-0002-7129-3002" }, { "name": { "family": "Baraffe", "given": "Isabelle" } }, { "name": { "family": "Bonavita", "given": "Mariangela" }, "orcid": "0000-0002-7520-8389" }, { "name": { "family": "Booth", "given": "Mark" }, "orcid": "0000-0001-8568-6336" }, { "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "name": { "family": "Chauvin", "given": "Gael" } }, { "name": { "family": "Chen", "given": "Christine" }, "orcid": "0000-0002-8382-0447" }, { "name": { "family": "Danielski", "given": "Camilla" }, "orcid": "0000-0002-3729-2663" }, { "name": { "family": "Furio", "given": "Matthew De" }, "orcid": "0000-0003-1863-4960" }, { "name": { "family": "Factor", "given": "Samuel M." }, "orcid": "0000-0002-8332-8516" }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "name": { "family": "Fortney", "given": "Jonathan J." }, "orcid": "0000-0002-9843-4354" }, { "name": { "family": "Grady", "given": "Carol" }, "orcid": "0000-0001-5440-1879" }, { "id": "Greenbaum-Alexandra-Z", "name": { "family": "Greenbaum", "given": "Alexandra Z." }, "orcid": "0000-0002-7162-8036" }, { "name": { "family": "Henning", "given": "Thomas" }, "orcid": "0000-0002-1493-300X" }, { "name": { "family": "Hoch", "given": "Kielan K. W." }, "orcid": "0000-0002-9803-8255" }, { "name": { "family": "Janson", "given": "Markus" }, "orcid": "0000-0001-8345-593X" }, { "name": { "family": "Kennedy", "given": "Grant" }, "orcid": "0000-0001-6831-7547" }, { "name": { "family": "Kenworthy", "given": "Matthew" }, "orcid": "0000-0002-7064-8270" }, { "name": { "family": "Kraus", "given": "Adam" }, "orcid": "0000-0001-9811-568X" }, { "name": { "family": "Kuzuhara", "given": "Masayuki" }, "orcid": "0000-0002-4677-9182" }, { "name": { "family": "Lagage", "given": "Pierre-Olivier" } }, { "name": { "family": "Lagrange", "given": "Anne-Marie" } }, { "name": { "family": "Launhardt", "given": "Ralf" } }, { "name": { "family": "Lazzoni", "given": "Cecilia" } }, { "name": { "family": "Lloyd", "given": "James" } }, { "name": { "family": "Marino", "given": "Sebastian" } }, { "name": { "family": "Marley", "given": "Mark" }, "orcid": "0000-0002-5251-2943" }, { "name": { "family": "Martinez", "given": "Raquel" }, "orcid": "0000-0001-6301-896X" }, { "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "name": { "family": "Matthews", "given": "Brenda" }, "orcid": "0000-0003-3017-9577" }, { "name": { "family": "Matthews", "given": "Elisabeth C." }, "orcid": "0000-0003-0593-1560" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "name": { "family": "Phillips", "given": "Mark" }, "orcid": "0000-0003-2734-0796" }, { "name": { "family": "Petrus", "given": "Simon" } }, { "name": { "family": "Quanz", "given": "Sascha P." }, "orcid": "0000-0003-3829-7412" }, { "name": { "family": "Quirrenbach", "given": "Andreas" }, "orcid": "0000-0002-8388-6040" }, { "name": { "family": "Rameau", "given": "Julien" }, "orcid": "0000-0003-0029-0258" }, { "name": { "family": "Rebollido", "given": "Isabel" }, "orcid": "0000-0002-4388-6417" }, { "name": { "family": "Rickman", "given": "Emily" }, "orcid": "0000-0003-4203-9715" }, { "name": { "family": "Samland", "given": "Matthias" }, "orcid": "0000-0001-9992-4067" }, { "name": { "family": "Sargent", "given": "B." }, "orcid": "0000-0001-9855-8261" }, { "name": { "family": "Schlieder", "given": "Joshua E." }, "orcid": "0000-0001-5347-7062" }, { "name": { "family": "Sivaramakrishnan", "given": "Anand" }, "orcid": "0000-0003-1251-4124" }, { "name": { "family": "Stone", "given": "Jordan M." }, "orcid": "0000-0003-0454-3718" }, { "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "name": { "family": "Tremblin", "given": "Pascal" }, "orcid": "0000-0001-6172-3403" }, { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "name": { "family": "Vasist", "given": "Malavika" } }, { "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "name": { "family": "Wagner", "given": "Kevin" }, "orcid": "0000-0002-4309-6343" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "The JWST Early Release Science Program for the Direct Imaging and Spectroscopy of Exoplanetary Systems", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Astronomy and Astrophysics", "note": "We thank the anonymous referee for numerous helpful suggestions, which significantly improved the manuscript. S. H. acknowledges the significant harm caused to members of the LGBTQIA+ community in the Department of State and NASA, while under the leadership of James Webb as Under Secretary of State and NASA Administrator, respectively. This project was supported by a grant from STScI (JWST-ERS-01386) under NASA contract NAS5-03127. M.T.is supported by JSPS KAKENHI Grant No.18H05442. M.B. acknowledges support from the Deutsche Forschungsgemeinschaft (DFG) through grant Kr 2164/13\u20132. K.W. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51472.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.", "abstract": "The direct characterization of exoplanetary systems with high-contrast imaging is among the highest priorities for the broader exoplanet community. As large space missions will be necessary for detecting and characterizing exo-Earth twins, developing the techniques and technology for direct imaging of exoplanets is a driving focus for the community. For the first time, JWST will directly observe extrasolar planets at mid-infrared wavelengths beyond 5 \u03bcm, deliver detailed spectroscopy revealing much more precise chemical abundances and atmospheric conditions, and provide sensitivity to analogs of our solar system ice-giant planets at wide orbital separations, an entirely new class of exoplanet. However, in order to maximize the scientific output over the lifetime of the mission, an exquisite understanding of the instrumental performance of JWST is needed as early in the mission as possible. In this paper, we describe our 55 hr Early Release Science Program that will utilize all four JWST instruments to extend the characterization of planetary-mass companions to \u223c15 \u03bcm as well as image a circumstellar disk in the mid-infrared with unprecedented sensitivity. Our program will also assess the performance of the observatory in the key modes expected to be commonly used for exoplanet direct imaging and spectroscopy, optimize data calibration and processing, and generate representative data sets that will enable a broad user base to effectively plan for general observing programs in future Cycles.", "date": "2022-09", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "134", "number": "1039", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 095003", "id_number": "CaltechAUTHORS:20221003-756400000.31", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221003-756400000.31", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "JWST-ERS-01386" }, { "agency": "NASA", "grant_number": "NAS5-03127" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "18H05442" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "Kr 2164/13-2" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51472.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "doi": "10.1088/1538-3873/ac77bd", "resource_type": "article", "pub_year": "2022", "author_list": "Hinkley, Sasha; Carter, Aarynn L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kdh6k-j7h20", "eprint_id": 116046, "eprint_status": "archive", "datestamp": "2023-08-20 07:33:08", "lastmod": "2024-02-02 21:11:48", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vissapragada-Shreyas", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Greklek-McKeon-Michael", "name": { "family": "Greklek-McKeon", "given": "Michael" }, "orcid": "0000-0002-0371-1647" }, { "id": "Oklop\u010di\u0107-Antonija", "name": { "family": "Oklop\u010di\u0107", "given": "Antonija" }, "orcid": "0000-0002-9584-6476" }, { "id": "Dai-Fei", "name": { "family": "Dai", "given": "Fei" }, "orcid": "0000-0002-8958-0683" }, { "id": "dos-Santos-Leonardo-A", "name": { "family": "dos Santos", "given": "Leonardo A." }, "orcid": "0000-0002-2248-3838" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Paragas-Kimberly", "name": { "family": "Paragas", "given": "Kimberly" } }, { "id": "Spake-Jessica-J", "name": { "family": "Spake", "given": "Jessica J." }, "orcid": "0000-0002-5547-3775" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation", "ispublished": "unpub", "full_text_status": "public", "note": "We thank the Palomar Observatory telescope operators, support astronomers, and directorate for their support of this work, especially Tom Barlow, Andy Boden, Carolyn Heffner, Paul Nied, Joel Pearman, Kajse Peffer, and Kevin Rykoski. We also thank Yayaati Chachan, Philipp Eigm\u00a8uller, Julie Inglis, Shubham Kanodia, Hannah Wakeford, and Nicole Wallack for insightful conversations. SV is supported by an NSF Graduate Research Fellowship. HAK acknowledges support from NSF CAREER grant 1555095. AO gratefully acknowledges support from the Dutch Research Council NWO Veni grant. \n\nFacilities: ADS, NASA Exoplanet Archive, Hale 200-inch, TESS. \n\nSoftware: numpy (Harris et al. 2020), scipy (Virtanen et al. 2020), astropy (Astropy Collaboration et al. 2013, 2018), matplotlib (Hunter 2007), p-winds (dos Santos et al. 2022), theano (The Theano Development Team et al. 2016), pymc3 (Salvatier et al. 2016), exoplanet (Foreman-Mackey et al. 2021a,b), ldtk (Husser et al. 2013; Parviainen & Aigrain 2015), corner (Foreman-Mackey 2016)\n\nSubmitted - 2204.11865.pdf
", "abstract": "Transit surveys indicate that there is a deficit of Neptune-sized planets on close-in orbits. If this \"Neptune desert\" is entirely cleared out by atmospheric mass loss, then planets at its upper edge should only be marginally stable against photoevaporation, exhibiting strong outflow signatures in tracers like the metastable helium triplet. We test this hypothesis by carrying out a 12-night photometric survey of the metastable helium feature with Palomar/WIRC, targeting seven gas-giant planets orbiting K-type host stars. Eight nights of data are analyzed here for the first time along with reanalyses of four previously-published datasets. We strongly detect helium absorption signals for WASP-69b, HAT-P-18b, and HAT-P-26b; tentatively detect signals for WASP-52b and NGTS-5b; and do not detect signals for WASP-177b and WASP-80b. We interpret these measured excess absorption signals using grids of Parker wind models to derive mass-loss rates, which are in good agreement with predictions from the hydrodynamical outflow code ATES for all planets except WASP-52b and WASP-80b, where our data suggest that the outflows are much smaller than predicted. Excluding these two planets, the outflows for the rest of the sample are consistent with a mean energy-limited outflow efficiency of \u03b5 = 0.41^(+0.16)_(\u22120.13). Even when we make the relatively conservative assumption that gas-giant planets experience energy-limited outflows at this efficiency for their entire lives, photoevaporation would still be too inefficient to carve the upper boundary of the Neptune desert. We conclude that this feature of the exoplanet population is a pristine tracer of giant planet formation and migration mechanisms.", "date": "2022-08-03", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20220802-224623032", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220802-224623032", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship" }, { "agency": "NSF", "grant_number": "AST-1555095" }, { "agency": "Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.48550/arXiv.2204.11865", "primary_object": { "basename": "2204.11865.pdf", "url": "https://authors.library.caltech.edu/records/kdh6k-j7h20/files/2204.11865.pdf" }, "resource_type": "monograph", "pub_year": "2022", "author_list": "Vissapragada, Shreyas; Knutson, Heather A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/389rq-cde42", "eprint_id": 115765, "eprint_status": "archive", "datestamp": "2023-08-22 16:45:08", "lastmod": "2023-10-23 20:14:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "MacGregor-Meredith-A", "name": { "family": "MacGregor", "given": "Meredith A." }, "orcid": "0000-0001-7891-8143" }, { "id": "Hurt-Spencer-A", "name": { "family": "Hurt", "given": "Spencer A." }, "orcid": "0000-0002-6903-9080" }, { "id": "Stark-Christopher-C", "name": { "family": "Stark", "given": "Christopher C." } }, { "id": "Howard-Ward-S", "name": { "family": "Howard", "given": "Ward S." }, "orcid": "0000-0002-0583-0949" }, { "id": "Weinberger-Alycia-J", "name": { "family": "Weinberger", "given": "Alycia J." }, "orcid": "0000-0001-6654-7859" }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Schneider-Glenn", "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "ALMA Images the Eccentric HD 53143 Debris Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Radio astronomy; Submillimeter astronomy; Circumstellar disks; Debris disks; Exoplanet formation; Planet formation; Exoplanet dynamics; Exoplanet evolution; Stellar activity; Stellar flares; Starspots; Stellar physics; Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2022 May 9; revised 2022 June 8; accepted 2022 June 8; published 2022 June 28. \n\nThis paper makes use of the following ALMA data: ADS/JAO.ALMA #2018.1.00461.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The TESS data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed can be accessed via https://doi.org/10.17909/t9-nmc8-f686. \n\nM.A.M. acknowledges support for part of this research from the National Aeronautics and Space Administration (NASA) under award number 19-ICAR19_2-0041. \n\nSoftware: CASA (v5.4.0 McMullin et al. 2007), galario (Tazzari et al. 2018), emcee (Foreman-Mackey et al. 2013), kepler (Foreman-Mackey et al. 2021), Lightkurve (Lightkurve Collaboration et al.2018), astropy (Astropy Collaboration et al. 2013, 2018), astroquery (Ginsburg et al. 2019).\n\nPublished - MacGregor_2022_ApJL_933_L1.pdf
Accepted Version - 2206.05856.pdf
", "abstract": "We present ALMA 1.3 mm observations of the HD 53143 debris disk\u2014the first infrared or millimeter image produced of this \u223c1 Gyr old solar analog. Previous HST STIS coronagraphic imaging did not detect flux along the minor axis of the disk, which could suggest a face-on geometry with two clumps of dust. These ALMA observations reveal a disk with a strikingly different structure. In order to fit models to the millimeter visibilities and constrain the uncertainties on the disk parameters, we adopt a Markov Chain Monte Carlo approach. This is the most eccentric debris disk observed to date with a forced eccentricity of 0.21 \u00b1 0.02, nearly twice that of the Fomalhaut debris disk, and also displays an apocenter glow. Although this eccentric model fits the outer debris disk well, significant interior residuals remain, which may suggest a possible edge-on inner disk, which remains unresolved in these observations. Combined with the observed structure difference between HST and ALMA, these results suggest a potential previous scattering event or dynamical instability in this system. We also note that the stellar flux changes considerably over the course of our observations, suggesting flaring at millimeter wavelengths. Using simultaneous TESS observations, we determine the stellar rotation period to be 9.6 \u00b1 0.1 days.", "date": "2022-07-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "933", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L1", "id_number": "CaltechAUTHORS:20220722-768731000", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220722-768731000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "19-ICAR19_2-0041" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/2041-8213/ac7729", "primary_object": { "basename": "2206.05856.pdf", "url": "https://authors.library.caltech.edu/records/389rq-cde42/files/2206.05856.pdf" }, "related_objects": [ { "basename": "MacGregor_2022_ApJL_933_L1.pdf", "url": "https://authors.library.caltech.edu/records/389rq-cde42/files/MacGregor_2022_ApJL_933_L1.pdf" } ], "resource_type": "article", "pub_year": "2022", "author_list": "MacGregor, Meredith A.; Hurt, Spencer A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vef1x-w8k51", "eprint_id": 115838, "eprint_status": "archive", "datestamp": "2023-10-09 21:06:34", "lastmod": "2023-10-24 16:32:13", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Prasow-\u00c9mond-Myriam", "name": { "family": "Prasow-\u00c9mond", "given": "M." }, "orcid": "0000-0002-2457-3431" }, { "id": "Hlavacek-Larrondo-Julie", "name": { "family": "Hlavacek-Larrondo", "given": "J." }, "orcid": "0000-0001-7271-7340" }, { "id": "Fogarty-Kevin", "name": { "family": "Fogarty", "given": "K." }, "orcid": "0000-0002-2691-2476" }, { "id": "Rameau-Julien", "name": { "family": "Rameau", "given": "J." }, "orcid": "0000-0003-0029-0258" }, { "id": "Guit\u00e9-Louis-Simon", "name": { "family": "Guit\u00e9", "given": "L.-S." }, "orcid": "0000-0002-8323-7809" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ghandi-Poshak", "name": { "family": "Gandhi", "given": "P." }, "orcid": "0000-0003-3105-2615" }, { "id": "Rao-A", "name": { "family": "Rao", "given": "A." } }, { "id": "Steiner-James-F", "name": { "family": "Steiner", "given": "J. F." }, "orcid": "0000-0002-5872-6061" }, { "id": "Artigau-\u00c9tienne", "name": { "family": "Artigau", "given": "\u00c9." }, "orcid": "0000-0003-3506-5667" }, { "id": "Lafreni\u00e8re-David", "name": { "family": "Lafreni\u00e8re", "given": "D." }, "orcid": "0000-0002-6780-4252" }, { "id": "Fabian-Andrew-C", "name": { "family": "Fabian", "given": "A. C." }, "orcid": "0000-0002-9378-4072" }, { "id": "Walton-Dominic-J", "name": { "family": "Walton", "given": "D. J." }, "orcid": "0000-0001-5819-3552" }, { "id": "Weiss-Lauren-M", "name": { "family": "Weiss", "given": "L. M." }, "orcid": "0000-0002-3725-3058" }, { "id": "Doyon-Ren\u00e9", "name": { "family": "Doyon", "given": "R." }, "orcid": "0000-0001-5485-4675" }, { "id": "Ren-Bin-B", "name": { "family": "Ren", "given": "B. B." }, "orcid": "0000-0003-1698-9696" }, { "id": "Rhea-Carter-L", "name": { "family": "Rhea", "given": "C. L." }, "orcid": "0000-0003-2001-1076" }, { "id": "B\u00e9gin-Th\u00e9ophile", "name": { "family": "B\u00e9gin", "given": "T." }, "orcid": "0000-0002-5837-8618" }, { "id": "Vigneron-Benjamin", "name": { "family": "Vigneron", "given": "B." }, "orcid": "0000-0002-2478-5119" }, { "id": "Naud-Marie-\u00c8ve", "name": { "family": "Naud", "given": "M.-E." }, "orcid": "0000-0003-1807-1598" } ] }, "title": "The First High-contrast Images of X-Ray Binaries: Detection of Candidate Companions in the \u03b3 Cas Analog RX J1744.7-2713", "ispublished": "pub", "full_text_status": "public", "keywords": "Multiple stars; Infrared astronomy; X-ray binary stars; High mass x-ray binary stars; Coronagraphic imaging; Direct imaging; Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2021 June 19; revised 2022 April 21; accepted 2022 May 4; published 2022 June 13. \n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. We also want to thank V. Christiaens for the help with VIP. \n\nM.P.E. is supported by the Institute for Data Valorisation (IVADO) through the M. Sc. Excellence Scholarship, by the Department of Physics of the Universit\u00e9 de Montr\u00e9al and by the Institute for Research on Exoplanets (iREx). J.H.L. is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Canada Research Chair programs and wishes to acknowledge the support of an NSERC Discovery Grant and the NSERC accelerator grant. J.R. acknowledges support by the French National Research Agency in the framework of the Investissements d'Avenir program (ANR-15-IDEX-02), through the funding of the \"Origin of Life\" project of the Univ. Grenoble-Alpes. D.J.W. acknowledges financial support from STFC in the form of an Ernest Rutherford fellowship.\n\nPublished - Prasow-Emond_2022_AJ_164_7.pdf
Submitted - 2205-05096.pdf
", "abstract": "X-ray binaries provide exceptional laboratories for understanding the physics of matter under the most extreme conditions. Until recently, there were few, if any, observational constraints on the circumbinary environments of X-ray binaries at \u223c100\u20135000 au scales. It remains unclear how the accretion onto the compact objects or the explosions giving rise to the compact objects interact with their immediate surroundings. Here, we present the first high-contrast adaptive optics images of X-ray binaries. These observations target all X-ray binaries within \u223c3 kpc accessible with the Keck/NIRC2 vortex coronagraph. This paper focuses on one of the first key results from this campaign; our images reveal the presence of 21 sources potentially associated with the \u03b3 Cassiopeiae analog high-mass X-ray binary RX J1744.7\u22122713. By conducting different analyses\u2014a preliminary proper motion analysis, a color\u2013magnitude diagram, and a probability of chance alignment calculation\u2014we found that three of these 21 sources have a high probability of being bound to the system. If confirmed, they would be in wide orbits (\u223c450 to 2500 au). While follow-up astrometric observations will be needed in \u223c5\u201310 yr to confirm further the bound nature of these detections, these discoveries emphasize that such observations may provide a major breakthrough in the field. In fact, they would be useful not only for our understanding of stellar multiplicity, but also for our understanding of how planets, brown dwarfs, and stars can form even in the most extreme environments.", "date": "2022-07", "date_type": "published", "publication": "Astronomical Journal", "volume": "164", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 7", "id_number": "CaltechAUTHORS:20220725-157108000", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220725-157108000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Institute for Data Valorisation", "grant_number": "RNA80117" }, { "agency": "Universit\u00e9 de Montr\u00e9al" }, { "agency": "Institute for Research on Exoplanets (IREx)" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "Canada Research Chairs Program" }, { "agency": "Agence Nationale de la Recherche (ANR)", "grant_number": "ANR-15-IDEX-02" }, { "agency": "Science and Technology Facilities Council (STFC)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ac6d57", "primary_object": { "basename": "2205-05096.pdf", "url": "https://authors.library.caltech.edu/records/vef1x-w8k51/files/2205-05096.pdf" }, "related_objects": [ { "basename": "Prasow-Emond_2022_AJ_164_7.pdf", "url": "https://authors.library.caltech.edu/records/vef1x-w8k51/files/Prasow-Emond_2022_AJ_164_7.pdf" } ], "resource_type": "article", "pub_year": "2022", "author_list": "Prasow-\u00c9mond, M.; Hlavacek-Larrondo, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/09zrb-3v745", "eprint_id": 113103, "eprint_status": "archive", "datestamp": "2023-08-22 16:20:40", "lastmod": "2023-10-23 22:55:41", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sun-He", "name": { "family": "Sun", "given": "He" }, "orcid": "0000-0003-1526-6787" }, { "id": "Bouman-K-L", "name": { "family": "Bouman", "given": "Katherine L." }, "orcid": "0000-0003-0077-4367" }, { "id": "Tiede-Paul", "name": { "family": "Tiede", "given": "Paul" }, "orcid": "0000-0003-3826-5648" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Blunt-Sarah-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "\u03b1-deep Probabilistic Inference (\u03b1-DPI): Efficient Uncertainty Quantification from Exoplanet Astrometry to Black Hole Feature Extraction", "ispublished": "pub", "full_text_status": "public", "keywords": "Astrostatistics; Radio interferometry; Exoplanets; Black holes", "note": "\u00a9 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2022 January 20; revised 2022 April 29; accepted 2022 April 29; published 2022 June 20. \n\nThis work was supported by NSF award 1935980, NSF award 2034306, NSF award 2048237, and Amazon AI4Science Fellowship. We thank the National Science Foundation (AST-1935980) for financial support of this work. This work has been supported in part by the Black Hole Initiative at Harvard University, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation to Harvard University. This work was supported in part by Perimeter Institute for Theoretical Physics. Research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Economic Development, Job Creation and Trade. J.W. and S.B. are supported by the Heising-Simons Foundation (including grant 2019-1698). The authors would also like to thank Shiro Ikeda for the helpful discussions. \n\nFacilities: Gemini Planet Imager (GPI) - , Event Horizon Telescope (EHT) - . \n\nSoftware: astropy (Astropy Collaboration et al. 2013, 2018), Cloudy (Ferland et al. 2013), Source Extractor (Bertin & Arnouts 1996) eht-imaging (Chael et al. 2018).\n\nPublished - Sun_2022_ApJ_932_99.pdf
Submitted - 2201.08506.pdf
", "abstract": "Inference is crucial in modern astronomical research, where hidden astrophysical features and patterns are often estimated from indirect and noisy measurements. Inferring the posterior of hidden features, conditioned on the observed measurements, is essential for understanding the uncertainty of results and downstream scientific interpretations. Traditional approaches for posterior estimation include sampling-based methods and variational inference (VI). However, sampling-based methods are typically slow for high-dimensional inverse problems, while VI often lacks estimation accuracy. In this paper, we propose \u03b1-deep probabilistic inference, a deep learning framework that first learns an approximate posterior using \u03b1-divergence VI paired with a generative neural network, and then produces more accurate posterior samples through importance reweighting of the network samples. It inherits strengths from both sampling and VI methods: it is fast, accurate, and more scalable to high-dimensional problems than conventional sampling-based approaches. We apply our approach to two high-impact astronomical inference problems using real data: exoplanet astrometry and black hole feature extraction.", "date": "2022-06-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "932", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 99", "id_number": "CaltechAUTHORS:20220125-215129959", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220125-215129959", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1935980" }, { "agency": "NSF", "grant_number": "AST-2034306" }, { "agency": "NSF", "grant_number": "CCF-2048237" }, { "agency": "Amazon AI4Science Fellowship" }, { "agency": "Black Hole Initiative" }, { "agency": "John Templeton Foundation" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Perimeter Institute for Theoretical Physics" }, { "agency": "Department of Innovation, Science and Economic Development (Canada)" }, { "agency": "Ontario Ministry of Economic Development, Job Creation and Trade" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1698" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ac6be9", "primary_object": { "basename": "2201.08506.pdf", "url": "https://authors.library.caltech.edu/records/09zrb-3v745/files/2201.08506.pdf" }, "related_objects": [ { "basename": "Sun_2022_ApJ_932_99.pdf", "url": "https://authors.library.caltech.edu/records/09zrb-3v745/files/Sun_2022_ApJ_932_99.pdf" } ], "resource_type": "article", "pub_year": "2022", "author_list": "Sun, He; Bouman, Katherine L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1d9er-wsy94", "eprint_id": 114305, "eprint_status": "archive", "datestamp": "2023-08-22 14:52:22", "lastmod": "2023-10-23 19:48:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Coker-Carl-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Riggs-A-J-Eldorado", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" } ] }, "title": "Laboratory demonstration of wavefront control through a single-mode fiber over a 20% bandwidth for the characterization of exoplanet atmospheres", "ispublished": "pub", "full_text_status": "public", "keywords": "exoplanets; high-contrast imaging; wavefront control; Space and Planetary Science; Mechanical Engineering; Astronomy and Astrophysics; Instrumentation; Control and Systems Engineering; Electronic, Optical and Magnetic Materials", "note": "\u00a9 2022 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nReceived: 14 September 2021; Accepted: 16 March 2022; Published: 7 April 2022. \n\nThe material is based upon work supported by NASA SAT under award number 80NSSC20K0624. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 029001_1.pdf
", "abstract": "To address the fundamental questions of exoplanetary science, future space-based observatories will have to obtain quality spectra of a large enough set of Earth-like planets around main-sequence stars. Although coronagraph instruments provide the necessary observational efficiency to probe many systems with respect to a starshade observation, they typically suffer from a limited achievable bandwidth at the necessary contrast and relatively poor throughput to off-axis sources. This is mainly due to the fact that the starlight is suppressed within the optical system, so the quasi-static aberrations from optical imperfections are the dominant term and need to be dealt with deformable mirrors (DMs). The DMs have limited capabilities to achieve large bandwidths, and their high stroke after corrections is highly detrimental to the Strehl ratio of off-axis sources. A technological path to overcome these issues is the use of single-mode fibers (SMFs). Coupling the planet light into an SMF to feed a high-resolution spectrograph has been shown to improve the final signal-to-noise ratio. Furthermore, it has been shown that it is more favorable to do broadband wavefront control with SMFs when exploiting their modal selectivity; the DMs have to work less so the bandwidth is improved and the off-axis throughput is better. Here, we demonstrate the potential of this technology by performing wavefront control through an SMF in a two-step process: first, by digging a small dark hole around the position of the SMF, and second, performing an innovative version of the electric field conjugation algorithm modified for SMFs. We perform these experiments with 20% bandwidth light at the high-contrast spectroscopy testbed achieving 2.5\u2009\u00d7\u200910\u207b\u2078 raw contrast.", "date": "2022-04", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "8", "number": "2", "publisher": "Society of Photo-optical Instrumentation Engineers", "pagerange": "Art. No. 029001", "id_number": "CaltechAUTHORS:20220414-26483000", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220414-26483000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "80NSSC20K0624" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.jatis.8.2.029001", "primary_object": { "basename": "029001_1.pdf", "url": "https://authors.library.caltech.edu/records/1d9er-wsy94/files/029001_1.pdf" }, "resource_type": "article", "pub_year": "2022", "author_list": "Llop-Sayson, Jorge; Coker, Carl T.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rtw1m-9ky54", "eprint_id": 113605, "eprint_status": "archive", "datestamp": "2023-08-22 14:48:49", "lastmod": "2023-10-23 23:08:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "name": { "family": "Kolecki", "given": "Jared R." }, "orcid": "0000-0002-6267-0849" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Baker-Ashley", "name": { "family": "Baker", "given": "Ashley" }, "orcid": "0000-0002-6525-7013" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Blake-G-A", "name": { "family": "Blake", "given": "Geoffrey A." }, "orcid": "0000-0003-0787-1610" }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "name": { "family": "Finnerty", "given": "Luke" }, "orcid": "0000-0002-1392-0768" }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "name": { "family": "Lopez", "given": "Ronald" } }, { "name": { "family": "Morris", "given": "Evan" } }, { "name": { "family": "Pai Asnodkar", "given": "Anusha" }, "orcid": "0000-0002-8823-8237" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "name": { "family": "Roy", "given": "Arpita" }, "orcid": "0000-0001-8127-5775" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Sappey", "given": "Ben" } }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "name": { "family": "Venenciano", "given": "Taylor" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" } ] }, "title": "Retrieving the C and O Abundances of HR 7672 AB: A Solar-type Primary Star with a Benchmark Brown Dwarf", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet atmospheric composition; Brown dwarfs; Chemical abundances", "note": "\u00a9 2022 The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2021 December 30; revised 2022 February 17; accepted 2022 February 18; published 2022 March 25. \n\nWe thank the anonymous referee whose comments and suggestions significantly improve the paper. We would like to thank Paul Molliere for the help in setting up and running petitRADTRANS. We thank Anjali Piette for helpful discussion on the P\u2013T profile. We thank the Heising-Simons Foundation for supporting the workshop on combining high-resolution spectroscopy and high-contrast imaging for exoplanet characterization, where the idea originated of combining photometric data and spectral data of different resolutions. KPIC has been supported by the Heising-Simons Foundation through grants #2015-129, #2017-318, and #2019-1312. This work was also partially supported by the Simons Foundation. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Wang_2022_AJ_163_189.pdf
Submitted - 2202.02477.pdf
", "abstract": "A benchmark brown dwarf (BD) is a BD whose properties (e.g., mass and chemical composition) are precisely and independently measured. Benchmark BDs are valuable in testing theoretical evolutionary tracks, spectral synthesis, and atmospheric retrievals for substellar objects. Here, we report results of atmospheric retrieval on a synthetic spectrum and a benchmark BD, HR 7672 B, with petitRADTRANS. First, we test the retrieval framework on a synthetic PHOENIX BT-Settl spectrum with a solar composition. We show that the retrieved C and O abundances are consistent with solar values, but the retrieved C/O is overestimated by 0.13\u20130.18, which is about four times higher than the formal error bar. Second, we perform retrieval on HR 7672 B using high spectral-resolution data (R = 35,000) from the Keck Planet Imager and Characterizer and near-infrared photometry. We retrieve [C/H], [O/H], and C/O to be \u22120.24 \u00b1 0.05, \u22120.19 \u00b1 0.04, and 0.52 \u00b1 0.02. These values are consistent with those of HR 7672 A within 1.5\u03c3. As such, HR 7672 B is among only a few benchmark BDs (along with Gl 570 D and HD 3651 B) that have been demonstrated to have consistent elemental abundances with their primary stars. Our work provides a practical procedure of testing and performing atmospheric retrieval, and sheds light on potential systematics of future retrievals using high- and low-resolution data.", "date": "2022-04", "date_type": "published", "publication": "Astronomical Journal", "volume": "163", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 189", "id_number": "CaltechAUTHORS:20220224-200938684", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220224-200938684", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Simons Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ac56e2", "primary_object": { "basename": "2202.02477.pdf", "url": "https://authors.library.caltech.edu/records/rtw1m-9ky54/files/2202.02477.pdf" }, "related_objects": [ { "basename": "Wang_2022_AJ_163_189.pdf", "url": "https://authors.library.caltech.edu/records/rtw1m-9ky54/files/Wang_2022_AJ_163_189.pdf" } ], "resource_type": "article", "pub_year": "2022", "author_list": "Wang, Ji; Kolecki, Jared R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h5qk5-q2c59", "eprint_id": 113782, "eprint_status": "archive", "datestamp": "2023-08-20 07:13:08", "lastmod": "2024-01-15 21:25:40", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Perez-Marcos", "name": { "family": "Perez", "given": "Marcos" } }, { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Simulating the study of exoplanets using photonic spectrographs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Astrophotonic spectrographs, Arrayed Waveguide Gratings, On-chip, Line Spread Function, Exoplanets", "note": "\u00a9 2022 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nM. Perez acknowledges the support from Caltech Summer Undergraduate Research Fellowship (SURF) program and the funding provided by the Flintridge Foundation for his work in the summer of 2021. P. Gatkine was supported by NASA Hubble Fellowship program as well as David & Ellen Lee Fellowship at Caltech. This work was supported by the Wilf Family Discovery Fund in Space and Planetary Science, funded by the Wilf Family Foundation. This research was carried out at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA) and funded through the President's and Director's Research & Development Fund Program.\n\nPublished - 120080C.pdf
Accepted Version - 2203.10153.pdf
", "abstract": "Photonic spectrographs offer a highly miniaturized, flexible, and stable on-chip solution for astronomical spectroscopy and can be used for various science cases such as determining the atmospheric composition of exoplanets to understand their habitability, formation, and evolution. Arrayed Waveguide Gratings (AWGs) have shown the best promise to be used as an astrophotonic spectrograph. We developed a publicly-available tool to conduct a preliminary examination of the capability of the AWGs in spectrally resolving exoplanet atmospheres. We derived the Line-Spread- Function (LSF) as a function of wavelength and the Full-Width-at-Half-Maximum (FWHM) of the LSF as a function of spectral line width to evaluate the response of a discretely- and continuously sampled low-resolution AWG (R ~ 1000). We observed that the LSF has minimal wavelength dependence (~5%), irrespective of the offset with respect to the center-wavelengths of the AWG channels, contrary to the previous assumptions. We further confirmed that the observed FWHM scales linearly with the emission line width. Finally, we present simulated extraction of a sample molecular absorption spectrum with the discretely- and continuously-sampled low-resolution AWGs. From this, we show that while the discrete AWG matches its expected resolving power, the continuous AWG spectrograph can, in principle, achieve an effective resolution significantly greater (~ 2x) than the discrete AWG. This detailed examination of the AWGs will be foundational for future deployment of AWG spectrographs for astronomical science cases such as exoplanet atmospheres.", "date": "2022-03-05", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220307-189697000", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220307-189697000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "Flintridge Foundation" }, { "agency": "NASA Hubble Fellowship" }, { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Wilf Family Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL President and Director's Fund" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Busse-Lynda-E", "name": { "family": "Busse", "given": "Lynda E." } }, { "id": "Soskind-Yakov", "name": { "family": "Soskind", "given": "Yakov" } } ] }, "doi": "10.1117/12.2610355", "primary_object": { "basename": "2203.10153.pdf", "url": "https://authors.library.caltech.edu/records/h5qk5-q2c59/files/2203.10153.pdf" }, "related_objects": [ { "basename": "120080C.pdf", "url": "https://authors.library.caltech.edu/records/h5qk5-q2c59/files/120080C.pdf" } ], "resource_type": "book_section", "pub_year": "2022", "author_list": "Perez, Marcos; Gatkine, Pradip; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nn17y-29k34", "eprint_id": 112929, "eprint_status": "archive", "datestamp": "2023-08-22 13:19:17", "lastmod": "2023-10-23 22:51:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Quiroz-Juan", "name": { "family": "Quiroz", "given": "Juan" }, "orcid": "0000-0001-8037-3779" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole L." }, "orcid": "0000-0003-0354-0187" }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "title": "Improving Planet Detection with Disk Modeling: Keck/NIRC2 Imaging of the HD 34282 Single-armed Protoplanetary Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Protoplanetary disks; Coronagraphic imaging; Planetary system formation; Space and Planetary Science; Astronomy and Astrophysics", "note": "\u00a9 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2021 October 4; revised 2021 November 23; accepted 2021 November 24; published 2022 January 4. \n\nWe thank the anonymous referee for comments that improved this Letter. This research is partially supported by NASA ROSES XRP award 80NSSC19K0294. We thank Jean-Baptiste Ruffio, Jason Wang, Christian Ginski, and Myriam Benisty for discussions on calculating contrast curves. R.D. acknowledges financial support provided by the Natural Sciences and Engineering Research Council of Canada through a Discovery Grant as well as the Alfred P. Sloan Foundation through a Sloan Research Fellowship. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Part of the computations presented here were conducted in the Resnick High Performance Computing Center, a facility supported by the Resnick Sustainability Institute at the California Institute of Technology. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO program 096.C-0248(A). This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This research has made use of the SVO Filter Profile Service (http://svo2.cab.inta-csic.es/theory/fps/) supported from the Spanish MINECO through grant AYA2017-84089. \n\nFacilities: Keck II (NIRC2) - , VLT:Melipal (SPHERE). \n\nSoftware: DebrisDiskFM (Ren et al. 2019), emcee (Foreman-Mackey et al. 2013), IRDAP (van Holstein et al. 2020), VIP (Gomez Gonzalez et al. 2017).\n\nPublished - Quiroz_2022_ApJL_924_L4.pdf
Accepted Version - 2111.12708.pdf
", "abstract": "Formed in protoplanetary disks around young stars, giant planets can leave observational features such as spirals and gaps in their natal disks through planet\u2013disk interactions. Although such features can indicate the existence of giant planets, protoplanetary disk signals can overwhelm the innate luminosity of planets. Therefore, in order to image planets that are embedded in disks, it is necessary to remove the contamination from the disks to reveal the planets possibly hiding within their natal environments. We observe and directly model the detected disk in the Keck/NIRC2 vortex coronagraph L\u2032-band observations of the single-armed protoplanetary disk around HD 34282. Despite a nondetection of companions for HD 34282, this direct disk modeling improves planet detection sensitivity by up to a factor of 2 in flux ratio and \u223c10 M_(Jupiter) in mass. This suggests that performing disk modeling can improve directly imaged planet detection limits in systems with visible scattered light disks, and can help to better constrain the occurrence rates of self-luminous planets in these systems.", "date": "2022-01-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "924", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L4", "id_number": "CaltechAUTHORS:20220114-265889000", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220114-265889000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "Alfred P. Sloan Foundation" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "AYA2017-84089" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Resnick-Sustainability-Institute" } ] }, "doi": "10.3847/2041-8213/ac3e62", "primary_object": { "basename": "2111.12708.pdf", "url": "https://authors.library.caltech.edu/records/nn17y-29k34/files/2111.12708.pdf" }, "related_objects": [ { "basename": "Quiroz_2022_ApJL_924_L4.pdf", "url": "https://authors.library.caltech.edu/records/nn17y-29k34/files/Quiroz_2022_ApJL_924_L4.pdf" } ], "resource_type": "article", "pub_year": "2022", "author_list": "Quiroz, Juan; Wallack, Nicole L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tscad-9bv69", "eprint_id": 113666, "eprint_status": "archive", "datestamp": "2023-08-22 13:12:59", "lastmod": "2023-10-23 17:47:23", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Riggs-A-J-Eldorado", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-Dwight-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Kern-Brian-D", "name": { "family": "Kern", "given": "Brian" } }, { "id": "Sidick-Erkin", "name": { "family": "Sidick", "given": "Erkin" } } ] }, "title": "Coronagraph design with the electric field conjugation algorithm", "ispublished": "pub", "full_text_status": "public", "keywords": "direct imaging of exoplanets; high-contrast imaging; coronagraphs; coronagraph design; Space and Planetary Science; Mechanical Engineering; Astronomy and Astrophysics; Instrumentation; Control and Systems Engineering; Electronic, Optical and Magnetic Materials", "note": "\u00a9 2022 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPaper 21092 received Aug. 16, 2021; accepted for publication Jan. 28, 2022; published online\nFeb. 26, 2022.\n\nThis work was partially supported by the National Science Foundation AST-ATI Grant No. 1710210. The material is based upon work supported by NASA SAT under Award No. 80NSSC20K0624. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 015003_1.pdf
", "abstract": "The requirements for a coronagraph instrument to image and obtain spectra of rocky planets around bright stars from space are tight. Indeed, the goal of imaging an Earth-like planet requires a starlight suppression system that cancels light to a level of 10\u207b\u00b9\u2070 with sufficient stability and robustness to errors. Furthermore, the key science questions necessitate an adequate sample size; consequently, the throughput of the coronagraph drives the achievable yield of a given mission. The trade among achievable raw contrast, sensitivity to wavefront errors, and throughput poses a challenging problem in coronagraph design. The complexity of this problem drives us toward the simultaneous solving of all optical elements. We present a set of methods to optimize the design of a coronagraph. We implement these for the case of the hybrid Lyot coronagraph in the context of the Nancy Grace Roman Space Telescope Coronagraph Instrument. We discuss our findings in terms of coronagraph instrument design, and optical subsystems, and performance interplay.", "date": "2022-01", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "8", "number": "1", "publisher": "Society of Photo-optical Instrumentation Engineers", "pagerange": "Art. No. 015003", "id_number": "CaltechAUTHORS:20220301-900025000", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220301-900025000", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" }, { "agency": "NASA", "grant_number": "80NSSC20K0624" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.jatis.8.1.015003", "primary_object": { "basename": "015003_1.pdf", "url": "https://authors.library.caltech.edu/records/tscad-9bv69/files/015003_1.pdf" }, "resource_type": "article", "pub_year": "2022", "author_list": "Llop-Sayson, Jorge; Riggs, A. J. Eldorado; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rzrws-gf211", "eprint_id": 101780, "eprint_status": "archive", "datestamp": "2023-08-22 12:23:45", "lastmod": "2023-10-19 23:10:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Golomb-Jacob", "name": { "family": "Golomb", "given": "Jacob" }, "orcid": "0000-0002-6977-670X" }, { "id": "Rocha-Gra\u00e7a-M", "name": { "family": "Rocha", "given": "Gra\u00e7a" }, "orcid": "0000-0002-4150-8076" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-Bertrand", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" } ] }, "title": "PlanetEvidence: Planet or Noise?", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet detection methods; Direct imaging; Bayesian statistics; Exoplanets", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2019 November 27; revised 2021 June 1; accepted 2021 June 21; published 2021 December 9. \n\nPlanetEvidence is implemented in pyKLIP and is run in conjunction with KLIP-FM.\n\nG.R. would like to acknowledge useful discussions with Jeff Jewell. The research presented here was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - Golomb_2021_AJ_162_304.pdf
Submitted - 1912.01232.pdf
", "abstract": "The work presented here attempts at answering the following question: how do we decide when a given detection is a planet or just residual noise in exoplanet direct imaging data? To this end we implement a metric meant to replace the empirical frequentist-based thresholds for detection. Our method, implemented within a Bayesian framework, introduces an \"evidence-based\" approach to help decide whether a given detection is a true planet or just noise. We apply this metric jointly with a postprocessing technique and Karhunen\u2013Loeve Image Processing (KLIP), which models and subtracts the stellar PSF from the image. As a proof of concept we implemented a new routine named PlanetEvidence that integrates the nested sampling technique (Multinest) with the KLIP algorithm. This is a first step to recast such a postprocessing method into a fully Bayesian perspective. We test our approach on real direct imaging data, specifically using GPI data of \u03b2 Pictoris b, and on synthetic data. We find that for the former the method strongly favors the presence of a planet (as expected) and recovers the true parameter posterior distributions. For the latter case our approach allows us to detect (true) dim sources invisible to the naked eye as real planets, rather than background noise, and set a new lower threshold for detection at \u223c2.5\u03c3 level. Further it allows us to quantify our confidence that a given detection is a real planet and not just residual noise.", "date": "2021-12", "date_type": "published", "publication": "Astronomical Journal", "volume": "162", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 304", "id_number": "CaltechAUTHORS:20200309-112437574", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200309-112437574", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ac174e", "primary_object": { "basename": "1912.01232.pdf", "url": "https://authors.library.caltech.edu/records/rzrws-gf211/files/1912.01232.pdf" }, "related_objects": [ { "basename": "Golomb_2021_AJ_162_304.pdf", "url": "https://authors.library.caltech.edu/records/rzrws-gf211/files/Golomb_2021_AJ_162_304.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Golomb, Jacob; Rocha, Gra\u00e7a; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wc19g-pvw25", "eprint_id": 111368, "eprint_status": "archive", "datestamp": "2023-08-22 11:45:39", "lastmod": "2023-10-23 20:33:01", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Blunt-Sarah-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "name": { "family": "Bond", "given": "Charlotte" } }, { "name": { "family": "Brinkman", "given": "Casey" }, "orcid": "0000-0002-4480-310X" }, { "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "name": { "family": "Chontos", "given": "Ashley" }, "orcid": "0000-0003-1125-2564" }, { "name": { "family": "Dalba", "given": "Paul A." }, "orcid": "0000-0002-4297-5506" }, { "id": "Fulton-Benjamin-J", "name": { "family": "Fulton", "given": "B. J." }, "orcid": "0000-0003-3504-5316" }, { "name": { "family": "Giacalone", "given": "Steven" }, "orcid": "0000-0002-8965-3969" }, { "name": { "family": "Hill", "given": "Michelle" }, "orcid": "0000-0002-0139-4756" }, { "name": { "family": "Hirsch", "given": "Lea A." }, "orcid": "0000-0001-8058-7443" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "name": { "family": "Isaacson", "given": "Howard" }, "orcid": "0000-0002-0531-1073" }, { "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "name": { "family": "Lubin", "given": "Jack" }, "orcid": "0000-0001-8342-7736" }, { "name": { "family": "Madurowicz", "given": "Alex" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "name": { "family": "Morris", "given": "Evan" } }, { "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "name": { "family": "Rice", "given": "Malena" }, "orcid": "0000-0002-7670-670X" }, { "id": "Rosenthal-Lee-J", "name": { "family": "Rosenthal", "given": "Lee J." }, "orcid": "0000-0001-8391-5182" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Rubenzahl-Ryan-A", "name": { "family": "Rubenzahl", "given": "Ryan" }, "orcid": "0000-0003-3856-3143" }, { "id": "Sun-He", "name": { "family": "Sun", "given": "He" }, "orcid": "0000-0003-1526-6787" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Constraining the Orbit and Mass of epsilon Eridani b with Radial Velocities, Hipparcos IAD-Gaia DR2 Astrometry, and Multiepoch Vortex Coronagraphy Upper Limits", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet astronomy; Exoplanets; Radial velocity; Astrometry; Direct imaging; Debris disks", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2021 May 11; revised 2021 June 22; accepted 2021 July 9; published 2021 October 6. \n\nThis work was partially supported by the National Science Foundation AST-ATI Grant 1710210. The material is based upon work supported by NASA under award No. 80NSSC20K0624. J.J.W. is supported by the Heising-Simons Foundation 51 Pegasi b Fellowship. J.J.W. thanks Rob de Rosa and Eric Nielsen for helpful discussions. P.D. is supported by a National Science Foundation (NSF) Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1903811. M.R. is supported by the National Science Foundation Graduate Research Fellowship Program under grant No. DGE-1752134 Part of this work has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 819155), and by the Wallonia-Brussels Federation (grant for Concerted Research Actions). We thank to Christopher Mendillo for useful discussions. \n\nSoftware: pyKLIP (Wang et al. 2015), Scipy(Jones et al. 2001), orbitize! (Blunt et al. 2020), emcee (Foreman-Mackey et al. 2013), corner.py (Foreman-Mackey 2016), RVSearch (Rosenthal et al. 2021), Astropy (Astropy Collaboration et al. 2013), Matplotlib (Hunter 2007).\n\nPublished - Llop-Sayson_2021_AJ_162_181.pdf
Accepted Version - 2108.02305.pdf
", "abstract": "\u03b5 Eridani is a young planetary system hosting a complex multibelt debris disk and a confirmed Jupiter-like planet orbiting at 3.48 au from its host star. Its age and architecture are thus reminiscent of the early Solar System. The most recent study of Mawet et al., which combined radial-velocity data and Ms-band direct imaging upper limits, started to constrain the planet's orbital parameters and mass, but are still affected by large error bars and degeneracies. Here we make use of the most recent data compilation from three different techniques to further refine epsilon Eridani b's properties: RVs, absolute astrometry measurements from the Hipparcos and Gaia missions, and new Keck/NIRC2 Ms-band vortex coronagraph images. We combine this data in a Bayesian framework. We find a new mass, M_b = 0.66_(-0.09)^(+0.12) MJup, and inclination, i = 78.81_(-22.41)^(+29.34), with at least a factor 2 of improvement over previous uncertainties. We also report updated constraints on the longitude of the ascending node, the argument of the periastron, and the time of periastron passage. With these updated parameters, we can better predict the position of the planet at any past and future epoch, which can greatly help define the strategy and planning of future observations and with subsequent data analysis. In particular, these results can assist the search for a direct detection with JWST and the Nancy Grace Roman Space Telescope's coronagraph instrument.", "date": "2021-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "162", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 181", "id_number": "CaltechAUTHORS:20211012-211826814", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211012-211826814", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" }, { "agency": "NASA", "grant_number": "80NSSC20K0624" }, { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1903811" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1752134" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "Wallonia-Brussels Federation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ac134a", "primary_object": { "basename": "Llop-Sayson_2021_AJ_162_181.pdf", "url": "https://authors.library.caltech.edu/records/wc19g-pvw25/files/Llop-Sayson_2021_AJ_162_181.pdf" }, "related_objects": [ { "basename": "2108.02305.pdf", "url": "https://authors.library.caltech.edu/records/wc19g-pvw25/files/2108.02305.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Llop-Sayson, Jorge; Wang, Jason J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/m4kdt-xy179", "eprint_id": 111779, "eprint_status": "archive", "datestamp": "2023-08-22 11:47:12", "lastmod": "2023-10-23 20:44:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "id": "Xie-Chen", "name": { "family": "Xie", "given": "Chen" }, "orcid": "0000-0002-6318-0104" }, { "id": "Aoyama-Yuhiko", "name": { "family": "Aoyama", "given": "Yuhiko" }, "orcid": "0000-0003-0568-9225" }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "Charles A." }, "orcid": "0000-0002-5627-5471" }, { "id": "Hashimoto-Jun", "name": { "family": "Hashimoto", "given": "Jun" }, "orcid": "0000-0002-3053-3575" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "Hasegawa-Yasuhiro", "name": { "family": "Hasegawa", "given": "Yasuhiro" }, "orcid": "0000-0002-9017-3663" }, { "id": "Ikoma-Masahiro", "name": { "family": "Ikoma", "given": "Masahiro" }, "orcid": "0000-0002-5658-5971" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "McElwain-Michael-W", "name": { "family": "McElwain", "given": "Michael W." }, "orcid": "0000-0003-0241-8956" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Wagner-Kevin-R", "name": { "family": "Wagner", "given": "Kevin R." }, "orcid": "0000-0002-4309-6343" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Zhou-Yifan", "name": { "family": "Zhou", "given": "Yifan" }, "orcid": "0000-0003-2969-6040" } ] }, "title": "Keck/OSIRIS Pa\u03b2 High-contrast Imaging and Updated Constraints on PDS 70b", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet astronomy; Planet formation", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2021 July 12; revised 2021 August 13; accepted 2021 September 14; published 2021 October 26. \n\nWe thank Jim Lyke for kindly helping to confirm the OSIRIS FoV settings. The authors would like to thank the anonymous referees for their constructive comments and suggestions to improve the quality of the paper. T.U. is supported by Grant-in-Aid for Japan Society for the Promotion of Science (JSPS) Fellows and JSPS KAKENHI grant No. JP21J01220. Y.H. is supported by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. K.W. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51472.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. The results reported herein benefited from collaborations and/or information exchange within NASA's Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by NASA's Science Mission Directorate. \n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. \n\nWe wish to acknowledge the critical importance of the current and recent Maunakea Observatories daycrew, technicians, telescope operators, computer support, and office staff employees, especially during the challenging times presented by the COVID-19 pandemic. Their expertize, ingenuity, and dedication is indispensable to the continued successful operation of these observatories. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Uyama_2021_AJ_162_214.pdf
Accepted Version - 2109.06930.pdf
", "abstract": "We present a high-contrast imaging search for Pa\u03b2 line emission from protoplanets in the PDS 70 system with Keck/OSIRIS integral field spectroscopy. We applied the high-resolution spectral differential imaging technique to the OSIRIS J-band data but did not detect the Pa\u03b2 line at the level predicted using the parameters of Hashimoto et al. (2020). This lack of Pa\u03b2 emission suggests the MUSE-based study may have overestimated the line width of H\u03b1. We compared our Pa\u03b2 detection limits with the previous H\u03b1 flux and H\u03b2 limits and estimated A_V to be \u223c0.9 and 2.0 for PDS 70 b and c, respectively. In particular, PDS 70 b's A_V is much smaller than implied by high-contrast near-infrared studies, which suggests the infrared-continuum photosphere and the hydrogen-emitting regions exist at different heights above the forming planet.", "date": "2021-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "162", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 214", "id_number": "CaltechAUTHORS:20211105-222234785", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211105-222234785", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP21J01220" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51472.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/ac2739", "primary_object": { "basename": "2109.06930.pdf", "url": "https://authors.library.caltech.edu/records/m4kdt-xy179/files/2109.06930.pdf" }, "related_objects": [ { "basename": "Uyama_2021_AJ_162_214.pdf", "url": "https://authors.library.caltech.edu/records/m4kdt-xy179/files/Uyama_2021_AJ_162_214.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Uyama, Taichi; Xie, Chen; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/06yy2-h9j42", "eprint_id": 110657, "eprint_status": "archive", "datestamp": "2023-08-22 11:24:05", "lastmod": "2024-02-02 21:07:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "name": { "family": "Finnerty", "given": "Luke" }, "orcid": "0000-0002-1392-0768" }, { "name": { "family": "Hood", "given": "Callie" }, "orcid": "0000-0003-1150-7889" }, { "name": { "family": "Zanazzi", "given": "J. J." }, "orcid": "0000-0002-9849-5886" }, { "id": "Bryan-Marta-L", "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Baker-Ashley", "name": { "family": "Baker", "given": "Ashley" } }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Blake-G-A", "name": { "family": "Blake", "given": "Geoffrey A." }, "orcid": "0000-0003-0787-1610" }, { "id": "Boden-Andy", "name": { "family": "Boden", "given": "Andy" } }, { "id": "Buzard-Cam", "name": { "family": "Buzard", "given": "Cam" }, "orcid": "0000-0002-9943-6124" }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "name": { "family": "Chun", "given": "Mark" }, "orcid": "0000-0002-8462-0703" }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "name": { "family": "Dupuy", "given": "Trent J." }, "orcid": "0000-0001-9823-1445" }, { "name": { "family": "Duch\u00eane", "given": "Gaspard" }, "orcid": "0000-0002-5092-6464" }, { "name": { "family": "Feng", "given": "Y. Katherina" } }, { "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "name": { "family": "Fortney", "given": "Jonathan" }, "orcid": "0000-0002-9843-4354" }, { "name": { "family": "Freedman", "given": "Richard S." } }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" }, { "name": { "family": "Konopacky", "given": "Quinn" }, "orcid": "0000-0002-9936-6285" }, { "name": { "family": "Lilley", "given": "Scott" } }, { "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "name": { "family": "Lopez", "given": "Ronald" } }, { "name": { "family": "Lupu", "given": "Roxana" } }, { "name": { "family": "Marley", "given": "Mark S." }, "orcid": "0000-0002-5251-2943" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "name": { "family": "Miles", "given": "Brittany" }, "orcid": "0000-0002-5500-4602" }, { "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "id": "Roy-Arpita", "name": { "family": "Roy", "given": "Arpita" }, "orcid": "0000-0001-8127-5775" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Sappey", "given": "Ben" } }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "name": { "family": "Weiss", "given": "Lauren" }, "orcid": "0000-0002-3725-3058" }, { "name": { "family": "Wetherell", "given": "Edward" } }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Detection and Bulk Properties of the HR 8799 Planets with High-resolution Spectroscopy", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet atmospheres; Exoplanet formation; High angular resolution; High resolution spectroscopy", "note": "\u00a9 2021. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2021 April 20; revised 2021 June 18; accepted 2021 July 9; published 2021 September 17. \n\nWe thank Sivan Ginzburg, Konstantin Batygin, and Eve Lee for useful discussions. We thank the Keck staff for helping support the deployment of KPIC during the global pandemic. J.J.W. is supported by the Heising-Simons Foundation 51 Pegasi b Fellowship. This work was supported by the Heising-Simons Foundation through grants #2015-129, #2017-318, and #2019-1312. This work was supported by the Simons Foundation. E.C.M. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1801978. Part of the computations presented here were conducted on the Caltech High Performance Cluster, partially supported by a grant from the Gordon and Betty Moore Foundation. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. Data presented in this work were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacility: Keck (KPIC). - \nSoftware: astropy (Astropy Collaboration et al. 2018), scipy (Virtanen et al. 2020), PyAstronomy (Czesla et al. 2019), pymultinest (Buchner et al. 2014), dynesty (Speagle 2020), whereistheplanet (Wang et al. 2021), corner (Foreman-Mackey 2016).\n\nPublished - Wang_2021_AJ_162_148.pdf
Accepted Version - 2107.06949.pdf
", "abstract": "Using the Keck Planet Imager and Characterizer, we obtained high-resolution (R \u223c 35,000) K-band spectra of the four planets orbiting HR 8799. We clearly detected H2O and CO in the atmospheres of HR 8799 c, d, and e, and tentatively detected a combination of CO and H2O in b. These are the most challenging directly imaged exoplanets that have been observed at high spectral resolution to date when considering both their angular separations and flux ratios. We developed a forward-modeling framework that allows us to jointly fit the spectra of the planets and the diffracted starlight simultaneously in a likelihood-based approach and obtained posterior probabilities on their effective temperatures, surface gravities, radial velocities, and spins. We measured v sin(i) values of 10.1^(+2.8)_(-2.7) km s\u207b\u00b9 for HR 8799 d and 15.0^(+2.3)_(-2.6) km s\u207b\u00b9 for HR 8799 e, and placed an upper limit of <14 km s\u207b\u00b9 of HR 8799 c. Under two different assumptions of their obliquities, we found tentative evidence that rotation velocity is anticorrelated with companion mass, which could indicate that magnetic braking with a circumplanetary disk at early times is less efficient at spinning down lower-mass planets.", "date": "2021-10", "date_type": "published", "publication": "Astronomical Journal", "volume": "162", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 148", "id_number": "CaltechAUTHORS:20210831-203938762", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210831-203938762", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1801978" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ac1349", "primary_object": { "basename": "2107.06949.pdf", "url": "https://authors.library.caltech.edu/records/06yy2-h9j42/files/2107.06949.pdf" }, "related_objects": [ { "basename": "Wang_2021_AJ_162_148.pdf", "url": "https://authors.library.caltech.edu/records/06yy2-h9j42/files/Wang_2021_AJ_162_148.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Wang, Jason J.; Ruffio, Jean-Baptiste; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k27dg-gzy03", "eprint_id": 115121, "eprint_status": "archive", "datestamp": "2023-08-20 05:05:18", "lastmod": "2024-01-15 21:26:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Desai-Niyati", "name": { "family": "Desai", "given": "Niyati" }, "orcid": "0000-0002-2843-8325" }, { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" }, "orcid": "0000-0002-6662-9560" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High contrast demonstrations of novel scalar vortex coronagraph designs at the high contrast spectroscopy testbed", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, scalar vortex coronagraph", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the NASA ROSES APRA program, grant NM0018F610. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nAccepted Version - 2205.10870.pdf
", "abstract": "For direct imaging of exoplanets, Scalar Vortex Coronagraphs (SVCs) are an attractive alternative to the popularly used Vector Vortex Coronagraphs (VVCs). This is primarily because they are able to induce the same phase ramp regardless of the incoming light's polarization state without compromising throughput while maintaining small inner working angle. We tested a set of stepped SVC staircase masks in the Exoplanet Technology Laboratory (ET Lab) at Caltech on the High-Contrast Spectroscopy Testbed (HCST). Here we present some preliminary findings of their starlight suppression ability, achieving raw contrasts on the order of 10\u207b\u2075 for 7 to 9 \u03bb/D. We also characterized their chromatic performance and performed wavefront control to achieve preliminary contrasts on the order of 10\u207b\u2077 with EFC for 6 to 10 \u03bb/D. These initial experimental results with SVCs have shown scalar vortex technology has a great potential for future exoplanet direct imaging missions.", "date": "2021-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-246088900", "editors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-246088900", "funders": { "items": [ { "agency": "NASA", "grant_number": "NM0018F610" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/12.2603953", "primary_object": { "basename": "2205.10870.pdf", "url": "https://authors.library.caltech.edu/records/k27dg-gzy03/files/2205.10870.pdf" }, "resource_type": "book_section", "pub_year": "2021", "author_list": "Desai, Niyati; Llop-Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pnprc-ngb39", "eprint_id": 111530, "eprint_status": "archive", "datestamp": "2023-08-20 05:03:06", "lastmod": "2024-01-15 21:24:26", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" }, "orcid": "0000-0002-3414-784X" }, { "id": "Kappel-Cole", "name": { "family": "Kappel", "given": "Cole" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "New method to achieve the proper polarization state for a vector vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Coronagraphs", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe material is based upon work supported by NASA SAT under award No. 80NSSC20K0624. C. K. is supported by the Caltech WAVE program. J.L.-S. thanks Garreth Ruane for helpful discussions.\n\nPublished - 118230P.pdf
Accepted Version - 2108.07371.pdf
", "abstract": "Characterizing the atmospheres of Earth-sized planets necessitates of the advancement in broadband wavefront control for coronagraph systems in large segmented telescopes. At the the High-Contrast Spectroscopy Testbed (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech we are working on a new concept that utilizes single mode fibers (SMFs) at the image plane of the coronagraph to recover the light from the planet and feed it into a spectrograph. This technology has shown to be advantageous in both chromatic and wavefront control performance. Here we report on the status of our 20% bandwidth wavefront control experiments, in which we control the starlight coupling into an SMF in the image plane. We achieve levels of 10\u207b\u2078 with deformable mirror (DM) solutions that hold the null through the SMF for several hours.", "date": "2021-09-03", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 118230P", "id_number": "CaltechAUTHORS:20211018-185302996", "isbn": "9781510644847", "book_title": "Techniques and Instrumentation for Detection of Exoplanets X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211018-185302996", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "80NSSC20K0624" }, { "agency": "Caltech WAVE Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2594871", "primary_object": { "basename": "118230P.pdf", "url": "https://authors.library.caltech.edu/records/pnprc-ngb39/files/118230P.pdf" }, "related_objects": [ { "basename": "2108.07371.pdf", "url": "https://authors.library.caltech.edu/records/pnprc-ngb39/files/2108.07371.pdf" } ], "resource_type": "book_section", "pub_year": "2021", "author_list": "Llop-Sayson, Jorge; Kappel, Cole; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ntjtf-wbx69", "eprint_id": 115127, "eprint_status": "archive", "datestamp": "2023-08-20 05:01:28", "lastmod": "2024-01-15 21:26:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Xuan-Jerry-W", "name": { "family": "Xuan", "given": "Jerry" }, "orcid": "0000-0002-6618-1137" }, { "id": "Toman-Katie", "name": { "family": "Toman", "given": "Katie" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Broadband vortex fiber nulling: high-dispersion exoplanet science at the diffraction limit", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "Exoplanets, Interferometry, Instrumentation, High Dispersion Coronagraphy, Keck Telescope, Fiber Nulling", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nDaniel Echeverri is supported by a NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship under award #80NSSC19K1423. This work was supported by the Heising-Simons Foundation through grants #2015-129, #2017-318, and #2019-1312. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).\n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.", "abstract": "As the number of confirmed exoplanets continues to grow, there is an increased push to spectrally characterize them to determine their atmospheric composition, formation paths, rotation rates, habitability, and much more. However, there is a large population of known exoplanets that either do not transit their star or have been detected at very small angular separations such that they are inaccessible to traditional coronagraph systems. Vortex Fiber Nulling (VFN) is a new single-aperture interferometric technique that uses the entire telescope pupil to bridge the gap between RV methods and traditional coronagraphy by enabling the direct observation and spectral characterization of targets at and within the diffraction limit. By combining a vortex mask with a single mode fiber, the on-axis starlight is rejected while the off-axis planet light is coupled and efficiently routed to a radiometer or spectrograph for analysis. We have demonstrated VFN in the lab monochromatically in the past. In this talk we present a polychromatic validation of VFN with null depths of 1e-4 across 10% bandwidth light. We also provide an update on deployment plans and predicted yield estimates for the VFN mode of the Keck Planet Imager and Characterizer (KPIC) instrument. Using PSISIM, a simulation package developed by our group, we asses KPIC VFN's ability to detect and characterize different types of targets including known exoplanets detected via the RV method. The KPIC VFN on-sky demonstration will pave the road to deployment on future instruments like HISPEC and MODHIS where it could provide high-resolution spectra of sub-Jupiter mass planets down to 5 milliarcseconds from their star.", "date": "2021-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-59544400", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-59544400", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "80NSSC19K1423" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "NASA/JPL/Caltech", "grant_number": "80NM0018D0004" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2597160", "resource_type": "book_section", "pub_year": "2021", "author_list": "Echeverri, Daniel; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vjkhq-t3f77", "eprint_id": 115119, "eprint_status": "archive", "datestamp": "2023-08-20 05:01:20", "lastmod": "2024-01-15 21:26:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Morris-Evan-C", "name": { "family": "Morris", "given": "Evan" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High resolution spectroscopy of directly imaged exoplanets with KPIC", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "Exoplanets, high contrast imaging, high resolution spectroscopy, high dispersion coronagraphy, single mode fibers, Keck Planet Imager and Characterizer", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nJ.J.W. is supported by the Heising-Simons Foundation 51 Pegasi b Fellowship. This work was supported by the Heising-Simons Foundation through grants #2015-129, #2017-318 and #2019-1312. This work was supported by the Simons Foundation. We thank the Keck staff for helping support the deployment of KPIC during the global pandemic. Data presented in this work were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a novel instrument that combines high-contrast imaging with high-resolution spectroscopy to enable high-dispersion coronagraphy (HDC) techniques that allow us to characterize directly imaged exoplanets at a spectral resolution of R~35,000. At this resolution, individual absorption lines in planetary atmospheres are spectrally resolved, allowing for measurements of molecular abundances to constrain chemical composition, planetary radial velocities to constrain orbital configurations, and planetary spin to constrain angular momentum evolution. I will provide an overview of the instrument, with a focus on its novel fiber injection unit (FIU) and the use of single mode fibers. I will discuss new HDC techniques we are developing that take advantage of the single-mode fibers of KPIC to both spatially and spectrally filter out the bright glare of the host stars to study the faint exoplanets. In particular, we have demonstrated the ability to forward model the high-resolution spectrum of diffracted stellar speckles, allowing us to directly fit our data without the need for cross-correlation functions. I will present some early science observations from KPIC that successfully demonstrate its technical capabilities, with the highlight being the first detection of all four HR 8799 planets at high spectral resolution. I will conclude with future avenues to push the sensitivity of HDC techniques and discuss possible synergies with other exoplanet characterization techniques such as long-baseline interferometry.", "date": "2021-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-133625200", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-133625200", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "doi": "10.1117/12.2596484", "resource_type": "book_section", "pub_year": "2021", "author_list": "Wang, Jason J.; Delorme, Jacques-Robert; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g2zhy-e4x62", "eprint_id": 115117, "eprint_status": "archive", "datestamp": "2023-08-20 04:45:58", "lastmod": "2024-01-15 21:26:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gatkine-Pradip-R", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "An on-chip astrophotonic spectrograph with a resolving power of 12,000", "ispublished": "unpub", "full_text_status": "public", "keywords": "Photonic spectrograph, Arrayed Waveguide Gratings, Silicon Nitride, Integrated Spectrograph, Astrophotonics, Near-IR", "note": "\u00a9 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPradip Gatkine was supported by the David and Ellen Lee Postdoctoral Fellowship at the California Institute of Technology. Nemanja Jovanovic acknowledges the help and expertise of BRIGHT Photonics and Ligentec in the design and fabrication of one of the chips tested in this work as part of their MPW service. This work was supported by the Wilf Family Discovery Fund in Space and Planetary Science, funded by the Wilf Family Foundation. This research was carried out at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA) and funded through the President's and Director's Research & Development Fund Program.\n\nAccepted Version - 2203.07867.pdf
", "abstract": "With the upcoming extremely large telescopes (ELTs), the volume, mass, and cost of the associated spectro- graphs will scale with the telescope diameter. Astrophotonics offers a unique solution to this problem in the form of single-mode fiber-fed diffraction-limited spectrographs on a chip. These highly miniaturized chips offer great flexibility in terms of coherent manipulation of photons. Such photonic spectrographs are well-suited to disperse the light from directly imaged planets (post-coronagraph, collected using a single-mode fiber) to characterize exoplanet atmospheres. Here we present the results from a proof-of-concept high-resolution astrophotonic spectrograph using the arrayed waveguide gratings (AWG) architecture. This chip uses the low-loss SiN platform (SiN core, SiO\u2082 cladding) with square waveguides (800 nm ~ 800 nm). The AWG has a measured resolving power (=) of ~ 12,000 and a free spectral range (FSR) of 2.8 nm. While the FSR is small, the chip operates over a broad band (1200 - 1700 nm). The peak on-chip throughput (excluding the coupling efficiency) is ~40% (- 4 dB) and the overall throughput (including the coupling loss) is ~ 11% (- 9.6 dB) in the TE mode. Thanks to the high-confinement waveguide geometry, the chip is highly miniaturized with a size of only 7.4 mm x 2 mm. This demonstration highlights the utility of SiN platform for astrophotonics, particularly, the capability of commercial SiN foundries to fabricate ultra-small, high-resolution, high-throughput AWG spectrographs on a chip suitable for astronomical applications.", "date": "2021-08-20", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20220610-860340600", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220610-860340600", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Wilf Family Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL President and Director's Fund" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Barto-Allison-A", "name": { "family": "Barto", "given": "Allison A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." }, "orcid": "0000-0002-9488-098X" }, { "id": "Stahl-H-Philip", "name": { "family": "Stahl", "given": "H. Philip" } } ] }, "doi": "10.1117/12.2594635", "primary_object": { "basename": "2203.07867.pdf", "url": "https://authors.library.caltech.edu/records/g2zhy-e4x62/files/2203.07867.pdf" }, "resource_type": "book_section", "pub_year": "2021", "author_list": "Gatkine, Pradip; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ev560-54689", "eprint_id": 110890, "eprint_status": "archive", "datestamp": "2023-08-22 10:54:34", "lastmod": "2023-10-23 19:54:52", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Gao-Peter", "name": { "family": "Gao", "given": "Peter" }, "orcid": "0000-0002-8518-9601" }, { "id": "Lee-Eve-J", "name": { "family": "Lee", "given": "Eve J." }, "orcid": "0000-0002-1228-9820" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "id": "Patel-Rahul-I", "name": { "family": "Patel", "given": "Rahul" }, "orcid": "0000-0002-5025-6827" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" } ] }, "title": "Characterization of HD 206893 B from Near- to Thermal-infrared", "ispublished": "pub", "full_text_status": "public", "keywords": "Brown dwarfs; Debris disks; Direct imaging; Coronagraphic imaging; Astrometry; Exoplanet atmospheres", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2020 December 7; revised 2021 June 5; accepted 2021 June 8; published 2021 August 17. \n\nWe thank the anonymous referee for their helpful suggestions that improved this paper. We thank our Keck/NIRC2 support staff, without whom the data could not have been obtained: Cynthia, Terry Stickel, Greg Doppmann, Bruno Femen\u00eda Castell\u00e1, and Carlos Alvarez. P.G. and J.W. acknowledge support from the 51 Pegasi b Fellowship sponsored by the Heising-Simons Foundation. P.G. is also supported by NASA through the NASA Hubble Fellowship grant HST-HF2-51456.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Part of this work has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 819155). This research has made use of the SVO Filter Profile Service (http://svo2.cab.inta-csic.es/theory/fps/) supported from the Spanish MINECO through grant AYA2017-84089. The plots presented in this paper we created using matplotlib in python (Hunter 2007). The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Meshkat_2021_ApJ_917_62.pdf
", "abstract": "HD 206893 B is a brown-dwarf companion orbiting inside the debris disk of its host star. We detect the brown dwarf in the Ms band using the Keck/NIRC2 instrument and vortex coronagraph. We measure its magnitude to be M_s 12.97_(-0.11)^(0.10). It is at an angular separation of 0farcs22 \u00b1 0farcs03, and a position angle of 39.6\u00b0 \u00b1 5.4\u00b0 east of north. Using this Ms-band measurement and the system age, we use three evolutionary models to estimate the mass to be 12\u201378 M_(Jup). We analyze the atmospheric properties from 1\u20135 \u03bcm using a grid of simulated atmospheric models. We find that a sedimentation flux f_(sed) value \u223c0.2 provides the best fit to the data, suggesting high vertically extended clouds. This may be indicative of high-altitude grains or a circumplanetary disk. Our model radii and luminosities for the companion find the best fits are ages of <100 Myr and masses <20 M_(Jup), consistent with our mass estimate from the evolutionary models using the Ms-band data alone. We detect orbital motion of the brown dwarf around the host star in comparison to the discovery image and derive orbital parameters. Finally we analyze how the companion brown dwarf interacts with the debris disk by estimating the location of the chaotic zone around the brown dwarf using values derived from this study's estimated mass and orbital constraints. We find that the collisions within the debris belt are likely driven by secular perturbations from the brown dwarf, rather than self-stirring.", "date": "2021-08-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "917", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 62", "id_number": "CaltechAUTHORS:20210914-225358608", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210914-225358608", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51456.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "AYA2017-84089" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA Sagan Fellowship" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-4357/ac09ed", "primary_object": { "basename": "Meshkat_2021_ApJ_917_62.pdf", "url": "https://authors.library.caltech.edu/records/ev560-54689/files/Meshkat_2021_ApJ_917_62.pdf" }, "resource_type": "article", "pub_year": "2021", "author_list": "Meshkat, Tiffany; Gao, Peter; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sdq1y-tgk33", "eprint_id": 110166, "eprint_status": "archive", "datestamp": "2023-08-20 04:08:18", "lastmod": "2023-10-23 18:19:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gatkine-Pradip", "name": { "family": "Gatkine", "given": "Pradip" }, "orcid": "0000-0002-1955-2230" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Hopgood-Christopher", "name": { "family": "Hopgood", "given": "Christopher" } }, { "id": "Ellis-Simon", "name": { "family": "Ellis", "given": "Simon" }, "orcid": "0000-0002-0742-379X" }, { "id": "Broeke-Ronald", "name": { "family": "Broeke", "given": "Ronald" } }, { "id": "\u0141awniczuk-Katarzyna", "name": { "family": "\u0141awniczuk", "given": "Katarzyna" } }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Potential of commercial SiN MPW platforms for developing mid/high-resolution integrated photonic spectrographs for astronomy", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2021 Optical Society of America. \n\nReceived 26 February 2021; accepted 19 March 2021; posted 29 March 2021 (Doc. ID 423439); published 20 April 2021. \n\nPradip Gatkine was supported by the David and Ellen Lee Postdoctoral Fellowship at the California Institute of Technology. Simon Ellis acknowledges the help and expertise of LioniX International in the fabrication of one of the chips tested in this work as part of their MPW service. Nemanja Jovanovic acknowledges the help and expertise of BRIGHT Photonics and Ligentec in the design and fabrication of one of the chips tested in this work as part of their MPW service. This work was supported by the Wilf Family Discovery Fund in Space and Planetary Science, funded by the Wilf Family Foundation. This research was carried out at the California Institute of Technology and the Jet Propulsion Laboratory under a contract with the National Aeronautics and Space Administration (NASA) and funded through the President's and Director's Research & Development Fund Program. \n\nFunding: Wilf Family Foundation; David and Ellen Lee Postdoctoral Fellowship Caltech; California Institute of Technology (NASA); Jet Propulsion Laboratory. \n\nData Availability: Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request. \n\nThe authors declare no conflicts of interest.\n\nAccepted Version - 2106.04598.pdf
", "abstract": "Integrated photonic spectrographs offer an avenue to extreme miniaturization of astronomical instruments, which would greatly benefit extremely large telescopes and future space missions. These devices first require optimization for astronomical applications, which includes design, fabrication, and field testing. Given the high costs of photonic fabrication, multi-project wafer (MPW) silicon nitride (SiN) offerings, where a user purchases a portion of a wafer, provide a convenient and affordable avenue to develop this technology. In this work, we study the potential of two commonly used SiN waveguide geometries by MPW foundries, i.e., square and rectangular profiles, to determine how they affect the performance of mid/high-resolution arrayed waveguide grating (AWG) spectrometers around 1.5 \u00b5m. Specifically, we present results from detailed simulations on the mode sizes, shapes, and polarization properties, and on the impact of phase errors on the throughput and cross talk as well as some laboratory results of coupling and propagation losses. From the MPW run tolerances and our phase-error study, we estimate that an AWG with R \u223c10,000 can be developed with the MPW runs, and even greater resolving power is achievable with more reliable, dedicated fabrication runs. Depending on the fabrication and design optimizations, it is possible to achieve throughputs ~60% using the SiN platform. Thus, we show that SiN MPW offerings are highly promising and will play a key role in integrated photonic spectrograph developments for astronomy.", "date": "2021-07-01", "date_type": "published", "publication": "Applied Optics", "volume": "60", "number": "19", "publisher": "Optical Society of America", "pagerange": "D15-D32", "id_number": "CaltechAUTHORS:20210809-161801301", "issn": "1559-128X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210809-161801301", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "David and Ellen Lee Postdoctoral Scholarship" }, { "agency": "Wilf Family Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL President and Director's Fund" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1364/ao.423439", "primary_object": { "basename": "2106.04598.pdf", "url": "https://authors.library.caltech.edu/records/sdq1y-tgk33/files/2106.04598.pdf" }, "resource_type": "article", "pub_year": "2021", "author_list": "Gatkine, Pradip; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/s22s1-6pg22", "eprint_id": 109875, "eprint_status": "archive", "datestamp": "2023-08-22 10:23:56", "lastmod": "2023-10-23 18:12:14", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Enabling high-res exoplanet spectroscopy at Keck", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Astronomical instrumentation; Exoplanets", "note": "\u00a9 2021 Nature Publishing Group. \n\nPublished 16 July 2021. \n\nKPIC is supported by grants from the Heising-Simons Foundation, the Simons Foundation, Caltech, JPL and NSF AST-1611623.", "abstract": "The Keck Planet Imager and Characterizer develops the Keck II telescope's adaptive optics and instrument systems to enable infrared imaging and spectroscopy of gas giant exoplanets, explains Principal Investigator Dimitri Mawet.", "date": "2021-07", "date_type": "published", "publication": "Nature Astronomy", "volume": "5", "number": "7", "publisher": "Nature Publishing Group", "pagerange": "723", "id_number": "CaltechAUTHORS:20210716-170640357", "issn": "2397-3366", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210716-170640357", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "Simons Foundation" }, { "agency": "Caltech" }, { "agency": "JPL" }, { "agency": "NSF", "grant_number": "AST-1611623" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1038/s41550-021-01429-6", "resource_type": "article", "pub_year": "2021", "author_list": "Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jptbx-d2a38", "eprint_id": 111245, "eprint_status": "archive", "datestamp": "2023-08-22 10:24:46", "lastmod": "2023-10-23 20:07:12", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall D." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "Scott" }, "orcid": "0000-0001-7323-7277" }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Doppmann-Greg-W", "name": { "family": "Doppmann", "given": "Greg" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Morris-Evan-C", "name": { "family": "Morris", "given": "Evan C." } }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Martin-Emily-C", "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "id": "Suominen-Nick", "name": { "family": "Suominen", "given": "Nick" } }, { "id": "Calvin-Benjamin", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "id": "Wang-Eric", "name": { "family": "Wang", "given": "Eric" } }, { "id": "Magnone-Kenneth", "name": { "family": "Magnone", "given": "Kenneth" } }, { "id": "Johnson-Christopher", "name": { "family": "Johnson", "given": "Christopher" }, "orcid": "0000-0001-9937-5272" }, { "id": "Sohn-Ji-Man", "name": { "family": "Sohn", "given": "Ji M." } }, { "id": "L\u00f3pez-Ronald-A", "name": { "family": "L\u00f3pez", "given": "Ronald A." } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Sayson-Jorge-L", "name": { "family": "Sayson", "given": "Jorge L." }, "orcid": "0000-0002-3414-784X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" } ] }, "title": "Keck Planet Imager and Characterizer: a dedicated single-mode fiber injection unit for high-resolution exoplanet spectroscopy", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation; W. M. Keck observatory; exoplanets; high contrast imaging; high dispersion coronagraphy; high-resolution spectroscopy", "note": "\u00a9 2021 The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. \n\nPaper 20188AS received Dec. 31, 2020; accepted for publication Jul. 27, 2021; published online Aug. 13, 2021. \n\nThis work was supported by the Heising-Simons Foundation through Grant No. 2019-1312. It has been previously submitted as an SPIE proceeding. W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 035006_1.pdf
Submitted - 2107.12556.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument to demonstrate technological and instrumental concepts initially developed for the exoplanet direct imaging field. Located downstream of the current Keck II adaptive optic (AO) system, KPIC contains a fiber injection unit (FIU) capable of combining the high-contrast imaging capability of the AOs system with the high dispersion spectroscopy capability of the current Keck high resolution infrared spectrograph (NIRSPEC). Deployed at Keck in September 2018, this instrument has already been used to acquire high-resolution spectra (R\u2009\u2009>\u2009\u200930,000) of multiple targets of interest. In the near term, it will be used to spectrally characterize known directly imaged exoplanets and low-mass brown dwarf companions visible in the northern hemisphere with a spectral resolution high enough to enable spin and planetary radial velocity measurements as well as Doppler imaging of atmospheric weather phenomena. Here, we present the design of the FIU, the unique calibration procedures needed to operate a single-mode fiber instrument and the system performance.", "date": "2021-07", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "7", "number": "3", "publisher": "Society of Photo-optical Instrumentation Engineers", "pagerange": "Art. No. 035006", "id_number": "CaltechAUTHORS:20211006-171113651", "issn": "2329-4221", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211006-171113651", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.JATIS.7.3.035006", "primary_object": { "basename": "035006_1.pdf", "url": "https://authors.library.caltech.edu/records/jptbx-d2a38/files/035006_1.pdf" }, "related_objects": [ { "basename": "2107.12556.pdf", "url": "https://authors.library.caltech.edu/records/jptbx-d2a38/files/2107.12556.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Delorme, Jacques-Robert; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qvddp-dvh93", "eprint_id": 109630, "eprint_status": "archive", "datestamp": "2023-08-22 10:14:07", "lastmod": "2023-10-23 18:05:33", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Chen-Christine-H", "name": { "family": "Chen", "given": "Christine H." }, "orcid": "0000-0002-8382-0447" }, { "id": "Milli-Julien", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Debes-John-H", "name": { "family": "Debes", "given": "John H." }, "orcid": "0000-0002-1783-8817" }, { "id": "Rebollido-Isabel", "name": { "family": "Rebollido", "given": "Isabel" }, "orcid": "0000-0002-4388-6417" }, { "id": "Stark-Christopher-C", "name": { "family": "Stark", "given": "Christopher C." } }, { "id": "Hagan-J-Brendan", "name": { "family": "Hagan", "given": "J. Brendan" } }, { "id": "Hines-Dean-C", "name": { "family": "Hines", "given": "Dean C." }, "orcid": "0000-0003-4653-6161" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Roberge-Aki", "name": { "family": "Roberge", "given": "Aki" }, "orcid": "0000-0002-2989-3725" }, { "id": "Schneider-Glenn", "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Soummer-R\u00e9mi", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Wolff-Schuyler-G", "name": { "family": "Wolff", "given": "Schuyler G." }, "orcid": "0000-0002-9977-8255" } ] }, "title": "A Layered Debris Disk around M Star TWA 7 in Scattered Light", "ispublished": "pub", "full_text_status": "public", "keywords": "Debris disks; Coronagraphic imaging; Planetary system formation; Orbital motion", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2021 March 1; revised 2021 May 18; accepted 2021 May 19; published 2021 June 18. \n\nWe thank the anonymous referee for useful suggestions that make this paper more thorough. We thank useful discussions with Johan Olofsson and Rob van Holstein. This paper was based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. This research has made use of data reprocessed as part of the ALICE program, which was supported by NASA through grants HST-AR-12652 (PI: R. Soummer), HST-GO-11136 (PI: D. Golimowski), HST-GO-13855 (PI: E. Choquet), HST-GO-13331 (PI: L. Pueyo), and STScI Director's Discretionary Research funds, and was conducted at STScI, which is operated by AURA under NASA contract NAS5-26555. The input images to ALICE processing are from the recalibrated NICMOS data products produced by the Legacy Archive project, \"A Legacy Archive PSF Library And Circumstellar Environments (LAPLACE) Investigation,\" (HST-AR-11279, PI: G. Schneider). Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO program 198.C-0209(F). Part of the computations presented here were conducted on the Caltech High Performance Cluster, partially supported by a grant from the Gordon and Betty Moore Foundation. \n\nFacilities: HST (NICMOS - , STIS) - , VLT:Melipal (SPHERE) - .\n\nSoftware: DebrisDiskFM (Ren et al. 2019), emcee (Foreman-Mackey et al. 2013), IRDAP (van Holstein et al. 2020), nmf_imaging (Ren 2020), pysynphot (STScI Development Team 2013), TinyTim (Krist et al. 2011).\n\nPublished - Ren_2021_ApJ_914_95.pdf
Accepted Version - 2105.09949.pdf
", "abstract": "We have obtained Hubble Space Telescope (HST) coronagraphic observations of the circumstellar disk around M star TWA 7 using the Space Telescope Imaging Spectrograph (STIS) instrument in visible light. Together with archival observations, including HST/NICMOS using the F160W filter and Very Large Telescope/SPHERE at the H-band in polarized light, we investigate the system in scattered light. By studying this nearly face-on system using geometric disk models and Henyey\u2013Greenstein phase functions, we report a new discovery of a tertiary ring and a clump. We identify a layered architecture: three rings, a spiral, and an \u2248150 au\u00b2 elliptical clump. The most extended ring peaks at 28 au, and the other components are on its outskirts. Our point-source detection-limit calculations demonstrate the necessity of disk modeling in imaging fainter planets. Morphologically, we witness a clockwise spiral motion, and the motion pattern is consistent with both solid body motion and local Keplerian motion; we also observe underdensity regions for the secondary ring that might result from mean-motion resonance or moving shadows: both call for re-observations to determine their nature. Comparing multi-instrument observations, we obtain blue STIS-NICMOS color, a STIS-SPHERE radial distribution peak difference for the tertiary ring, and a high SPHERE-NICMOS polarization fraction; these aspects indicate that TWA 7 could retain small dust particles. By viewing the debris disk around M star TWA 7 at a nearly face-on vantage point, our study allows for the understanding of such disks in scattered light in both system architecture and dust property.", "date": "2021-06-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "914", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 95", "id_number": "CaltechAUTHORS:20210628-191053670", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210628-191053670", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NAS 5-26555" }, { "agency": "NASA", "grant_number": "HST-AR-12652" }, { "agency": "NASA", "grant_number": "HST-GO-11136" }, { "agency": "NASA", "grant_number": "HST-GO-13855" }, { "agency": "NASA", "grant_number": "HST-GO-13331" }, { "agency": "STScI Director's Discretionary Research funds" }, { "agency": "NASA", "grant_number": "HST-AR-11279" }, { "agency": "Gordon and Betty Moore Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ac03b9", "primary_object": { "basename": "2105.09949.pdf", "url": "https://authors.library.caltech.edu/records/qvddp-dvh93/files/2105.09949.pdf" }, "related_objects": [ { "basename": "Ren_2021_ApJ_914_95.pdf", "url": "https://authors.library.caltech.edu/records/qvddp-dvh93/files/Ren_2021_ApJ_914_95.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Ren, Bin; Choquet, \u00c9lodie; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0bnb1-byh98", "eprint_id": 107041, "eprint_status": "archive", "datestamp": "2023-08-22 09:58:26", "lastmod": "2023-10-23 15:27:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-Samaporn", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Kasliwal-M-M", "name": { "family": "Kasliwal", "given": "Mansi M." }, "orcid": "0000-0002-5619-4938" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Leonard-Douglas-C", "name": { "family": "Leonard", "given": "Douglas C." } }, { "id": "Bulla-Mattia", "name": { "family": "Bulla", "given": "Mattia" }, "orcid": "0000-0002-8255-5127" }, { "id": "De-Kishalay", "name": { "family": "De", "given": "Kishalay" }, "orcid": "0000-0002-8989-0542" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Hankins-Matthew-J", "name": { "family": "Hankins", "given": "Matthew" }, "orcid": "0000-0001-9315-8437" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Infrared spectropolarimetric detection of intrinsic polarization from a core-collapse supernova", "ispublished": "pub", "full_text_status": "public", "keywords": "Time-domain astronomy; Transient astrophysical phenomena", "note": "\u00a9 2021 Nature Publishing Group. \n\nReceived 14 May 2020; Accepted 27 January 2021; Published 11 March 2021. \n\nWe thank A. Cikota and J. Sollerman for reading the manuscript and providing helpful comments and suggestions. We thank L. Dessart for helpful discussions, and for providing us with a model of optical depth in SN 1987A-like explosions. We thank the following for providing machine-readable data for the SNe listed: A. Cikota for SN 2005df; T. Nagao for SN 2017gmr; and M. Tanaka for SNe 2005bf, 2007gr and 2009mi. The data presented herein were obtained at Palomar Observatory, which is operated by a collaboration between the California Institute of Technology, the Jet Propulsion Laboratory, Yale University and the National Astronomical Observatories of China. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research made use of Astropy, a community-developed core Python package for Astronomy. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Figure 4c is based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA). \n\nData availability: The data that support the findings of this study are available from the corresponding author upon reasonable request. \n\nCode availability: The WIRC+Pol data reduction pipeline can be publicly accessed at https://github.com/WIRC-Pol/wirc_drp. The specific scripts used to reproduce the results of this study are available from the corresponding author upon reasonable request. \n\nAuthor Contributions: S.T., M.M.-B., D.M., N.J., G.V. and E.S. were responsible for the design, construction and commissioning of the WIRC+Pol instrument, which enabled this study. S.T., M.M.K. and D.M. designed the experiment. S.T. and M.M.-B. obtained and analysed the data. S.T., D.C.L. and M.B. interpreted the results. M.M.K., K.D. and M.H. designed and built the Gattini-IR telescope and were responsible for providing photometric data for the analysis. S.T. and M.M.-B. prepared the manuscript with input and review from all authors. \n\nThe authors declare no competing interests. \n\nPeer review information: Nature Astronomy thanks Grant Williams and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.\n\nSubmitted - 2102.02075.pdf
Supplemental Material - 41550_2021_1320_MOESM1_ESM.pdf
", "abstract": "Massive stars die an explosive death as a core-collapse supernova (CCSN). The exact physical processes that cause the collapsing star to rebound into an explosion are not well understood, and the key to resolving this issue may lie in the measurement of the shape of CCSNe ejecta. Spectropolarimetry is the only way to perform this measurement for CCSNe outside the Milky Way and Magellanic Clouds. We present the infrared spectropolarimetric detection of a CCSN enabled by the new highly sensitive WIRC+Pol instrument at Palomar Observatory, which can observe CCSNe (magnitude M\u2009=\u2009\u221217\u2009mag) out to 20\u2009Mpc at ~0.1% polarimetric precision. Infrared spectropolarimetry is less affected than optical spectropolarimetry by dust scattering in the circumstellar and interstellar media, thereby providing a less biased probe of the intrinsic geometry of the supernova ejecta. SN 2018hna, a SN 1987A-like explosion, shows 2.0\u2009\u00b1\u20090.3% continuum polarization in the J band oriented at ~160\u00b0 on sky 182\u2009days after the explosion. Assuming a prolate geometry as in SN 1987A, we infer an ejecta axis ratio of <0.48 with the axis of symmetry pointing at a 70\u00b0 position angle. The axis ratio is similar to that of SN 1987A, suggesting that the two CCSNe may share intrinsic geometry and inclination angles. Our data do not rule out oblate ejecta. We also observe one other CCSN and two thermonuclear supernovae in the J band. Supernova 2020oi, a stripped-envelope type Ic SN in Messier 100 has broadband p\u2009=\u20090.37\u2009\u00b1\u20090.09% at peak light, indicative of either a 10% asymmetry or host interstellar polarization. The type Ia SNe 2019ein and 2020ue have <0.33% and <1.08% polarization near peak light, indicative of asymmetries of less than 10% and 20%, respectively.", "date": "2021-06", "date_type": "published", "publication": "Nature Astronomy", "volume": "5", "number": "6", "publisher": "Nature Publishing Group", "pagerange": "544-551", "id_number": "CaltechAUTHORS:20201211-153013822", "issn": "2397-3366", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201211-153013822", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1038/s41550-021-01320-4", "primary_object": { "basename": "2102.02075.pdf", "url": "https://authors.library.caltech.edu/records/0bnb1-byh98/files/2102.02075.pdf" }, "related_objects": [ { "basename": "41550_2021_1320_MOESM1_ESM.pdf", "url": "https://authors.library.caltech.edu/records/0bnb1-byh98/files/41550_2021_1320_MOESM1_ESM.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ew00c-wca90", "eprint_id": 109142, "eprint_status": "archive", "datestamp": "2023-08-20 03:12:56", "lastmod": "2023-10-23 17:41:28", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hinkley-Sasha", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "name": { "family": "Matthews", "given": "Elisabeth C." }, "orcid": "0000-0003-0593-1560" }, { "name": { "family": "Lefevre", "given": "Charl\u00e8ne" }, "orcid": "0000-0001-7349-6113" }, { "name": { "family": "Lestrade", "given": "Jean-Francois" } }, { "name": { "family": "Kennedy", "given": "Grant" }, "orcid": "0000-0001-6831-7547" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stapelfeldt-Karl-R", "name": { "family": "Stapelfeldt", "given": "Karl R." }, "orcid": "0000-0002-2805-7338" }, { "name": { "family": "Ray", "given": "Shrishmoy" } }, { "id": "Mamajek-Eric-E", "name": { "family": "Mamajek", "given": "Eric" }, "orcid": "0000-0003-2008-1488" }, { "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "name": { "family": "Wilner", "given": "David" }, "orcid": "0000-0003-1526-7587" }, { "name": { "family": "Williams", "given": "Jonathan" }, "orcid": "0000-0001-5058-695X" }, { "name": { "family": "Ansdell", "given": "Megan" }, "orcid": "0000-0003-4142-9842" }, { "name": { "family": "Wyatt", "given": "Mark" }, "orcid": "0000-0001-9064-5598" }, { "name": { "family": "Lau", "given": "Alexis" }, "orcid": "0000-0003-3802-828X" }, { "name": { "family": "Phillips", "given": "Mark W." }, "orcid": "0000-0001-6041-7092" }, { "name": { "family": "Fernandez", "given": "Jorge" } }, { "name": { "family": "Gagn\u00e9", "given": "Jonathan" }, "orcid": "0000-0002-2592-9612" }, { "name": { "family": "Bubb", "given": "Emma" } }, { "name": { "family": "Sutlieff", "given": "Ben J." }, "orcid": "0000-0002-9962-132X" }, { "name": { "family": "Wilson", "given": "Thomas J. G." } }, { "name": { "family": "Matthews", "given": "Brenda" }, "orcid": "0000-0003-3017-9577" }, { "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Piskorz-Danielle", "name": { "family": "Piskorz", "given": "Danielle" }, "orcid": "0000-0003-4451-2342" }, { "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" }, { "name": { "family": "Gonzalez", "given": "Erica" } }, { "name": { "family": "Mann", "given": "Andrew W." }, "orcid": "0000-0003-3654-1602" }, { "name": { "family": "Mace", "given": "Gregory" }, "orcid": "0000-0001-7875-6391" } ] }, "title": "Discovery of an Edge-on Circumstellar Debris Disk around BD+45\u00b0 598: A Newly Identified Member of the \u03b2 Pictoris Moving Group", "ispublished": "pub", "full_text_status": "public", "keywords": "Circumstellar disks", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2020 December 9; revised 2021 March 2; accepted 2021 March 4; published 2021 May 11. \n\nWe thank the anonymous referee for several helpful comments, which improved the quality of the manuscript. Some of this work was performed in part under an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1203023. Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. Part of this work has been carried out within the framework of the National Centre of Competence in Research PlanetS supported by the Swiss National Science Foundation. E.C.M. acknowledges the financial support of the SNSF. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. This work used the Immersion Grating Infrared Spectrometer (IGRINS) that was developed under a collaboration between the University of Texas at Austin and the Korea Astronomy and Space Science Institute (KASI) with the financial support of the Mt. Cuba Astronomical Foundation, of the US National Science Foundation under grants AST-1229522 and AST-1702267, of the McDonald Observatory of the University of Texas at Austin, of the Korean GMT Project of KASI, and Gemini Observatory. This paper includes data taken at The McDonald Observatory of The University of Texas at Austin. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004).\n\nPublished - Hinkley_2021_ApJ_912_115.pdf
Accepted Version - 2103.12824.pdf
", "abstract": "We report the discovery of a circumstellar debris disk viewed nearly edge-on and associated with the young, K1 star BD+45\u00b0 598 using high-contrast imaging at 2.2 \u03bcm obtained at the W.M. Keck Observatory. We detect the disk in scattered light with a peak significance of ~5\u03c3 over three epochs, and our best-fit model of the disk is an almost edge-on ~70 au ring, with inclination angle ~87\u00b0. Using the NOEMA interferometer at the Plateau de Bure Observatory operating at 1.3 mm, we find resolved continuum emission aligned with the ring structure seen in the 2.2 \u03bcm images. We estimate a fractional infrared luminosity of L_(IR)/L_(tot) \u22436\u207a\u00b2\u208b\u2081 \u00d7 10\u207b\u2074, higher than that of the debris disk around AU Mic. Several characteristics of BD+45\u00b0 598, such as its galactic space motion, placement in a color\u2013magnitude diagram, and strong presence of lithium, are all consistent with its membership in the \u03b2 Pictoris Moving Group with an age of 23 \u00b1 3 Myr. However, the galactic position for BD+45\u00b0 598 is slightly discrepant from previously known members of the \u03b2 Pictoris Moving Group, possibly indicating an extension of members of this moving group to distances of at least 70 pc. BD+45\u00b0 598 appears to be an example from a population of young circumstellar debris systems associated with newly identified members of young moving groups that can be imaged in scattered light, key objects for mapping out the early evolution of planetary systems from ~10\u2013100 Myr. This target will also be ideal for northern-hemisphere, high-contrast imaging platforms to search for self-luminous, planetary mass companions residing in this system.", "date": "2021-05-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "912", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 115", "id_number": "CaltechAUTHORS:20210517-085457959", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210517-085457959", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1203023" }, { "agency": "W. M. Keck Foundation" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "Royal Society" }, { "agency": "Smithsonian Institution" }, { "agency": "Academia Sinica" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "NSF", "grant_number": "AST-1229522" }, { "agency": "NSF", "grant_number": "AST-1702267" }, { "agency": "NASA/JPL/Caltech", "grant_number": "80NM0018D0004" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/abec6e", "primary_object": { "basename": "2103.12824.pdf", "url": "https://authors.library.caltech.edu/records/ew00c-wca90/files/2103.12824.pdf" }, "related_objects": [ { "basename": "Hinkley_2021_ApJ_912_115.pdf", "url": "https://authors.library.caltech.edu/records/ew00c-wca90/files/Hinkley_2021_ApJ_912_115.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Hinkley, Sasha; Matthews, Elisabeth C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xvg39-hp155", "eprint_id": 107867, "eprint_status": "archive", "datestamp": "2023-08-22 09:03:55", "lastmod": "2023-10-23 16:18:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bowler-Brendan-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Cochran-William-D", "name": { "family": "Cochran", "given": "William D." }, "orcid": "0000-0001-9662-3496" }, { "id": "Endl-Michael", "name": { "family": "Endl", "given": "Michael" }, "orcid": "0000-0002-7714-6310" }, { "id": "Franson-Kyle", "name": { "family": "Franson", "given": "Kyle" }, "orcid": "0000-0003-4557-414X" }, { "id": "Brandt-Timothy-D", "name": { "family": "Brandt", "given": "Timothy D." }, "orcid": "0000-0003-2630-8073" }, { "id": "Dupuy-Trent-J", "name": { "family": "Dupuy", "given": "Trent J." }, "orcid": "0000-0001-9823-1445" }, { "id": "MacQueen-Phillip-J", "name": { "family": "MacQueen", "given": "Phillip J." } }, { "id": "Kratter-Kaitlin-M", "name": { "family": "Kratter", "given": "Kaitlin M." }, "orcid": "0000-0001-5253-1338" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "title": "The McDonald Accelerating Stars Survey (MASS): White Dwarf Companions Accelerating the Sun-like Stars 12 Psc and HD 159062", "ispublished": "pub", "full_text_status": "public", "keywords": "White dwarf stars; Direct imaging; Binary stars; Astrometric binary stars; Radial velocity; Orbit determination", "note": "\u00a9 2021 The American Astronomical Society. \n\nReceived 2020 October 30; revised 2020 December 8; accepted 2020 December 8; published 2021 February 8. \n\nThe authors are grateful to Michal Liu for the early NIRC2 imaging observations of 12 Psc in 2004 and 2005 as well as Keith Hawkins for helpful discussions about this system. We thank Diane Paulson, Rob Wittenmyer, Erik Brugamyer, Caroline Caldwell, Paul Robertson, Kevin Gullikson, and Marshall Johnson for contributing to the Tull observations of 12 Psc presented in this study. This work was supported by a NASA Keck PI Data Award, administered by the NASA Exoplanet Science Institute. Data presented herein were obtained at the W. M. Keck Observatory from telescope time allocated to the National Aeronautics and Space Administration through the agency's scientific partnership with the California Institute of Technology and the University of California. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. This research has made use of the Keck Observatory Archive (KOA), which is operated by the W. M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI), under contract with the National Aeronautics and Space Administration. B.P.B. acknowledges support from the National Science Foundation grant AST-1909209. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacilities: Smith (Tull Spectrograph) - , HET (HRS) - , Keck:II (NIRC2). -\n\nPublished - Bowler_2021_AJ_161_106.pdf
Accepted Version - 2012.04847.pdf
", "abstract": "We present the discovery of a white dwarf companion to the G1 V star 12 Psc found as part of a Keck adaptive optics imaging survey of long-term accelerating stars from the McDonald Observatory Planet Search Program. Twenty years of precise radial-velocity monitoring of 12 Psc with the Tull Spectrograph at the Harlan J. Smith telescope reveals a moderate radial acceleration (\u224810 m s\u207b\u00b9 yr \u207b\u00b9), which together with relative astrometry from Keck/NIRC2 and the astrometric acceleration between Hipparcos and Gaia DR2 yields a dynamical mass of M_B = 0.605^(+0.021)_(\u22120.022) M \u2299 for 12 Psc B, a semimajor axis of 40\u207a\u00b2\u208b\u2084 au, and an eccentricity of 0.84 \u00b1 0.08. We also report an updated orbital fit of the white dwarf companion to the metal-poor (but barium-rich) G9 V dwarf HD 159062 based on new radial-velocity observations from the High-Resolution Spectrograph at the Hobby\u2013Eberly Telescope and astrometry from Keck/NIRC2. A joint fit of the available relative astrometry, radial velocities, and tangential astrometric acceleration yields a dynamical mass of M_B = 0.609^(+0.010)_(\u22120.011) M\u2299 for HD 159062 B, a semimajor axis of 60\u207a\u2075\u208b\u2087 au, and preference for circular orbits (e < 0.42 at 95% confidence). 12 Psc B and HD 159062 B join a small list of resolved Sirius-like benchmark white dwarfs with precise dynamical mass measurements which serve as valuable tests of white dwarf mass\u2013radius cooling models and probes of AGB wind accretion onto their main-sequence companions.", "date": "2021-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "161", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 106", "id_number": "CaltechAUTHORS:20210202-095309275", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210202-095309275", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1909209" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/abd243", "primary_object": { "basename": "2012.04847.pdf", "url": "https://authors.library.caltech.edu/records/xvg39-hp155/files/2012.04847.pdf" }, "related_objects": [ { "basename": "Bowler_2021_AJ_161_106.pdf", "url": "https://authors.library.caltech.edu/records/xvg39-hp155/files/Bowler_2021_AJ_161_106.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Bowler, Brendan P.; Cochran, William D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/n456j-wgq95", "eprint_id": 108081, "eprint_status": "archive", "datestamp": "2023-08-20 01:49:26", "lastmod": "2023-10-20 23:06:12", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wagner-Kevin", "name": { "family": "Wagner", "given": "K." }, "orcid": "0000-0002-4309-6343" }, { "name": { "family": "Boehle", "given": "A." }, "orcid": "0000-0003-0439-7634" }, { "name": { "family": "Pathak", "given": "P." }, "orcid": "0000-0003-3991-6107" }, { "name": { "family": "Kasper", "given": "M." }, "orcid": "0000-0002-8425-6606" }, { "name": { "family": "Arsenault", "given": "R." } }, { "name": { "family": "Jakob", "given": "G." } }, { "name": { "family": "K\u00e4ufl", "given": "U." }, "orcid": "0000-0002-8806-9795" }, { "name": { "family": "Leveratto", "given": "S." } }, { "name": { "family": "Maire", "given": "A.-L." }, "orcid": "0000-0002-2591-4138" }, { "name": { "family": "Pantin", "given": "\u00c9." }, "orcid": "0000-0001-6472-2844" }, { "name": { "family": "Siebenmorgen", "given": "R." }, "orcid": "0000-0002-9788-672X" }, { "name": { "family": "Zins", "given": "G." }, "orcid": "0000-0001-8862-7702" }, { "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "name": { "family": "Ageorges", "given": "N." } }, { "name": { "family": "Apai", "given": "D." }, "orcid": "0000-0003-3714-5855" }, { "name": { "family": "Carlotti", "given": "A." }, "orcid": "0000-0002-5859-0141" }, { "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "name": { "family": "Delacroix", "given": "C." }, "orcid": "0000-0003-0150-4430" }, { "name": { "family": "Dohlen", "given": "K." }, "orcid": "0000-0001-8248-2397" }, { "name": { "family": "Duhoux", "given": "P." } }, { "name": { "family": "Forsberg", "given": "P." } }, { "name": { "family": "Fuenteseca", "given": "E." } }, { "name": { "family": "Gutruf", "given": "S." } }, { "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "name": { "family": "Huby", "given": "E." }, "orcid": "0000-0002-1342-2822" }, { "name": { "family": "Kampf", "given": "D." } }, { "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "name": { "family": "Kervella", "given": "P." }, "orcid": "0000-0003-0626-1749" }, { "name": { "family": "Kirchbauer", "given": "J.-P." } }, { "name": { "family": "Klupar", "given": "P." } }, { "name": { "family": "Kolb", "given": "J." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "N'Diaye", "given": "M." }, "orcid": "0000-0002-1721-3294" }, { "name": { "family": "Orban de Xivry", "given": "G." }, "orcid": "0000-0002-4790-415X" }, { "name": { "family": "Quanz", "given": "S. P." }, "orcid": "0000-0003-3829-7412" }, { "name": { "family": "Reutlinger", "given": "A." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Riquelme", "given": "M." } }, { "name": { "family": "Soenke", "given": "C." } }, { "name": { "family": "Sterzik", "given": "M." }, "orcid": "0000-0002-5784-4437" }, { "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "name": { "family": "de Zeeuw", "given": "T." } } ] }, "title": "Imaging low-mass planets within the habitable zone of \u03b1 Centauri", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanets", "note": "\u00a9 The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. \n\nReceived 06 October 2020; Accepted 13 January 2021; Published 10 February 2021.\n\nNEAR was made possible by contributions from the Breakthrough Watch program, as well as contributions from the European Southern Observatory, including director's discretionary time. Breakthrough Watch is managed by the Breakthrough Initiatives, sponsored by the Breakthrough Prize Foundation. We would like to thank Rus Belikov, Eduardo Bendek, Bernhard Brandl, Ryan Endsley, Rachel Fernandes, Kaitlin Kratter, Christian Marois, Michael Meyer, and Maxwell Moe for fruitful discussions and advice. The results reported herein benefited from collaborations and/or information exchange within NASA's Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by NASA's Science Mission Directorate. This work was supported by the National Centre of Competence in Research PlanetS supported by the Swiss National Science Foundation, by the Fonds de la Recherche Scientifique\u2014FNRS under Grant no F.4504.18, by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement no. 819155) and under the European Union's Seventh Framework Program (grant agreement no 337569), and by the Wallonia-Brussels Federation (grant for Concerted Research Actions). K.W. acknowledges support from NASA through the NASA Hubble Fellowship grant HST-HF2-51472.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. A.B. and S.P.Q. acknowledge the financial support of the Swiss National Science Foundation. G.R. was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. \n\nData availability: All data from the NEAR campaign are publicly available at archive.eso.org under program ID 2102.C-5011(A). Original and processed data are also available from the corresponding author upon request. \n\nAuthor Contributions: M. Kasper contributed as the NEAR experiment lead. K.W., A.B., P.P., M. Kasper, \u00c9.C., and S.P.Q. contributed to the data analysis. K.W., A.B., P.P., M. Kasper, and D.A. contributed to the preparation of the manuscript. K.W., A.B., U.K., A.-L.M., E.P., R.S., O.A., N.A., D.A., O.G., D.M., S.P.Q., M.S., A.V., and T.Z. contributed scientific advice. M. Kasper, U.K., A.-L.M, E.P., R.S., G.Z., O.A., and J.K. contributed to campaign observations. R.A. contributed to experiment management. G.J. contributed to experiment engineering (mechanics, system). U.K. contributed to experiment engineering (optics, system). A.-L.M., O.A., P.F., E.H., M. Karlsson, D.M., G.O.X., and G.R. contributed to experiment engineering (coronagraph). A.C. and G.R. contributed to coronagraph apodizer design. G.Z. and P.D. contributed to experiment engineering (software). N.A. N.A., S.G., D.K., S.L., A.R., and M.R. contributed to experiment engineering (system). C.D. contributed to experiment testing (coronagraph). K.D., M.N.D., and A.V. contributed to experiment engineering (non-common path aberrations). E.F. contributed to experiment engineering (cooling). O.G. and P. Klupar contributed to experiment oversight. P. Kervella contributed to the analysis of the background star hypothesis. J.-P.K. contributed to experiment engineering (mechanics). C.S. contributed to experiment engineering (electronics). J.K. contributed to adaptive optics operation. M.N.D. and M.R. contributed to experiment commissioning. M.S. and T.Z. contributed to project oversight. \n\nThe authors declare no competing interests. \n\nPeer review information: Nature Communications thanks Andy Skemer and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Peer reviewer reports are available.\n\nWagner, K., Boehle, A., Pathak, P. et al. Author Correction: Imaging low-mass planets within the habitable zone of \u03b1 Centauri. Nat Commun 12, 2651 (2021). https://doi.org/10.1038/s41467-021-23145-5\n\nPublished - s41467-021-21176-6.pdf
Accepted Version - 2102.05159.pdf
Supplemental Material - 41467_2021_21176_MOESM1_ESM.pdf
Supplemental Material - 41467_2021_21176_MOESM2_ESM.pdf
Erratum - s41467-021-23145-5.pdf
", "abstract": "Giant exoplanets on wide orbits have been directly imaged around young stars. If the thermal background in the mid-infrared can be mitigated, then exoplanets with lower masses can also be imaged. Here we present a ground-based mid-infrared observing approach that enables imaging low-mass temperate exoplanets around nearby stars, and in particular within the closest stellar system, \u03b1 Centauri. Based on 75\u201380% of the best quality images from 100\u2009h of cumulative observations, we demonstrate sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of \u03b1 Centauri A. This is an order of magnitude more sensitive than state-of-the-art exoplanet imaging mass detection limits. We also discuss a possible exoplanet or exozodiacal disk detection around \u03b1 Centauri A. However, an instrumental artifact of unknown origin cannot be ruled out. These results demonstrate the feasibility of imaging rocky habitable-zone exoplanets with current and upcoming telescopes.", "date": "2021-02-10", "date_type": "published", "publication": "Nature Communications", "volume": "12", "publisher": "Nature Publishing Group", "pagerange": "Art. No. 922", "id_number": "CaltechAUTHORS:20210217-071454983", "issn": "2041-1723", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210217-071454983", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Breakthrough Prize Foundation" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)", "grant_number": "F.4504.18" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Wallonia-Brussels Federation" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51472.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1038/s41467-021-21176-6", "pmcid": "PMC7876126", "primary_object": { "basename": "41467_2021_21176_MOESM2_ESM.pdf", "url": "https://authors.library.caltech.edu/records/n456j-wgq95/files/41467_2021_21176_MOESM2_ESM.pdf" }, "related_objects": [ { "basename": "s41467-021-21176-6.pdf", "url": "https://authors.library.caltech.edu/records/n456j-wgq95/files/s41467-021-21176-6.pdf" }, { "basename": "s41467-021-23145-5.pdf", "url": "https://authors.library.caltech.edu/records/n456j-wgq95/files/s41467-021-23145-5.pdf" }, { "basename": "2102.05159.pdf", "url": "https://authors.library.caltech.edu/records/n456j-wgq95/files/2102.05159.pdf" }, { "basename": "41467_2021_21176_MOESM1_ESM.pdf", "url": "https://authors.library.caltech.edu/records/n456j-wgq95/files/41467_2021_21176_MOESM1_ESM.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Wagner, K.; Boehle, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bv87q-n5987", "eprint_id": 107866, "eprint_status": "archive", "datestamp": "2023-08-22 08:03:06", "lastmod": "2023-10-23 16:18:01", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Stelter-R-Deno", "name": { "family": "Stelter", "given": "R. Deno" }, "orcid": "0000-0003-4549-0210" }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Steph" }, "orcid": "0000-0001-6871-6775" }, { "id": "Kupke-Renate", "name": { "family": "Kupke", "given": "Renate" }, "orcid": "0000-0002-5826-5314" }, { "id": "Hinz-Philip-M", "name": { "family": "Hinz", "given": "Phil" }, "orcid": "0000-0002-1954-4564" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Ratliffe-Christopher", "name": { "family": "Ratliffe", "given": "Christopher" } }, { "id": "MacDonald-Nicholas-R", "name": { "family": "MacDonald", "given": "Nicholas" }, "orcid": "0000-0002-6684-8691" }, { "id": "Deich-William-T-S", "name": { "family": "Deich", "given": "William" } }, { "id": "Kruglikov-Gabriel", "name": { "family": "Kruglikov", "given": "Gabriel" } }, { "id": "Kassis-Marc", "name": { "family": "Kassis", "given": "Marc" } }, { "id": "Lyke-James", "name": { "family": "Lyke", "given": "Jim" }, "orcid": "0000-0001-7809-7867" }, { "id": "Briesemeister-Zackery", "name": { "family": "Briesemeister", "given": "Zackery" }, "orcid": "0000-0002-1764-2494" }, { "id": "Miles-Brittany", "name": { "family": "Miles", "given": "Brittany" } }, { "id": "Gerard-Benjamin-L", "name": { "family": "Gerard", "given": "Benjamin" }, "orcid": "0000-0003-3978-9195" }, { "id": "Fitzgerald-Michael-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Brandt-Timothy-D", "name": { "family": "Brandt", "given": "Timothy" }, "orcid": "0000-0003-2630-8073" }, { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" } ] }, "title": "Update on the Preliminary Design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics; high-contrast; instrumentation; exoplanets; thermal infrared; integral field spectroscopy; slenslit", "note": "Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).\n\nWe gratefully acknowledge the support of the Heising-Simons Foundation through grant #2019-1697. UC Observatory engineers and staff have worked tirelessly through the COVID-19 pandemic and raging fires. The lead author wishes to acknowledge the Herculean effort on the part of frontline healthcare workers through the pandemic including his father, who serves as an ambulance driver.\n\nSubmitted - 2012.09098.pdf
", "abstract": "SCALES (Santa Cruz Array of Lenslets for Exoplanet Spectroscopy) is a 2-5 micron high-contrast lenslet integral-field spectrograph (IFS) driven by exoplanet characterization science requirements and will operate at W. M. Keck Observatory. Its fully cryogenic optical train uses a custom silicon lenslet array, selectable coronagraphs, and dispersive prisms to carry out integral field spectroscopy over a 2.2 arcsec field of view at Keck with low (<300) spectral resolution. A small, dedicated section of the lenslet array feeds an image slicer module that allows for medium spectral resolution (5000\u221210000), which has not been available at the diffraction limit with a coronagraphic instrument before. Unlike previous IFS exoplanet instruments, SCALES is capable of characterizing cold exoplanet and brown dwarf atmospheres (<600 K) at bandpasses where these bodies emit most of their radiation while capturing relevant molecular spectral features.", "date": "2021-02-03", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20210202-095305886", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210202-095305886", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1697" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.2012.09098", "primary_object": { "basename": "2012.09098.pdf", "url": "https://authors.library.caltech.edu/records/bv87q-n5987/files/2012.09098.pdf" }, "resource_type": "monograph", "pub_year": "2021", "author_list": "Stelter, R. Deno; Skemer, Andrew J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ym1b4-c2a70", "eprint_id": 108050, "eprint_status": "archive", "datestamp": "2023-08-20 01:43:36", "lastmod": "2023-10-23 16:25:59", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Calvin-Benjamin", "name": { "family": "Calvin", "given": "Benjamin" }, "orcid": "0000-0003-4737-5486" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Colborn-Jennah-K", "name": { "family": "Colborn", "given": "Jennah" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "Tobias" } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "Michael" }, "orcid": "0000-0003-3168-5586" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Enhancing Direct Exoplanet Spectroscopy with Apodizing and Beam Shaping Optics", "ispublished": "pub", "full_text_status": "public", "keywords": "Astronomical instrumentation \u2013 High resolution spectroscopy \u2013 Exoplanets", "note": "\u00a9 2021. The Astronomical Society of the Pacific. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2020 November 4; accepted 2021 January 12; published 2021 February 10. \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312, #2017-318, and #2015-129. Support was provided by the Simons Foundation grant \"Planetary Context of Habitability and Exobiology\". \n\nG. Ruane was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.\n\nPublished - Calvin_2021_PASP_133_024503.pdf
Accepted Version - 2102.11499.pdf
", "abstract": "Direct exoplanet spectroscopy aims to measure the spectrum of an exoplanet while simultaneously minimizing the light collected from its host star. Isolating the planet light from the starlight improves the signal-to-noise ratio (S/N) per spectral channel when noise due to the star dominates, which may enable new studies of the exoplanet atmosphere with unprecedented detail at high spectral resolution (>30,000). However, the optimal instrument design depends on the flux level from the planet and star compared to the noise due to other sources, such as detector noise and thermal background. Here we present the design, fabrication, and laboratory demonstration of specially-designed optics to improve the S/N in two potential regimes in direct exoplanet spectroscopy with adaptive optics instruments. The first is a pair of beam-shaping lenses that increase the planet signal by improving the coupling efficiency into a single-mode fiber at the known position of the planet. The second is a grayscale apodizer that reduces the diffracted starlight for planets at small angular separations from their host star. The former especially increases S/N when dominated by detector noise or thermal background, while the latter helps reduce stellar noise. We show good agreement between the theoretical and experimental point spread functions in each case and predict the exposure time reduction (~33%) that each set of optics provides in simulated observations of 51 Eridani b using the Keck Planet Imager and Characterizer instrument at W. M. Keck Observatory.", "date": "2021-02", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "133", "number": "1020", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 024503", "id_number": "CaltechAUTHORS:20210212-140005713", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210212-140005713", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2017-318" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1088/1538-3873/abdace", "primary_object": { "basename": "2102.11499.pdf", "url": "https://authors.library.caltech.edu/records/ym1b4-c2a70/files/2102.11499.pdf" }, "related_objects": [ { "basename": "Calvin_2021_PASP_133_024503.pdf", "url": "https://authors.library.caltech.edu/records/ym1b4-c2a70/files/Calvin_2021_PASP_133_024503.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Calvin, Benjamin; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cw8e2-hj904", "eprint_id": 107626, "eprint_status": "archive", "datestamp": "2023-08-22 08:44:09", "lastmod": "2023-10-23 16:04:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Matthews-Elisabeth-C", "name": { "family": "Matthews", "given": "Elisabeth C." }, "orcid": "0000-0003-0593-1560" }, { "id": "Hinkley-Sasha", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Stapelfeldt-Karl-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Vigan-Arthur", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Crossfield-Ian-J-M", "name": { "family": "Crossfield", "given": "Ian J. M." }, "orcid": "0000-0002-1835-1891" }, { "id": "David-Trevor-J", "name": { "family": "David", "given": "Trevor J." }, "orcid": "0000-0001-6534-6246" }, { "id": "Mamajek-Eric-E", "name": { "family": "Mamajek", "given": "Eric" }, "orcid": "0000-0003-2008-1488" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Morales-Farisa-Y", "name": { "family": "Morales", "given": "Farisa" }, "orcid": "0000-0001-9414-3851" }, { "id": "Padgett-Deborah-L", "name": { "family": "Padgett", "given": "Deborah" }, "orcid": "0000-0001-5334-5107" } ] }, "title": "Three New Late-type Stellar Companions to Very Dusty WISE Debris Disks Identified with SPHERE Imaging", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanets; Extrasolar gas giants; Debris disks; Circumstellar disks; Planetesimals; Direct imaging; Coronagraphic imaging", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2020 August 15; revised 2020 October 19; accepted 2020 November 13; published 2021 January 20. \n\nWe thank the anonymous referee for their thorough reading of this work, which improved the quality of the manuscript. A.V. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 757561). Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 095.C-0426(A), 097.C-1042(A) and 099.C-0734(A). This research has made use of the VizieR catalog access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in A&AS 143, 23. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. \n\nFacilities: VLT: Melipal - , WISE - , Gaia. - \n\nSoftware: astropy (Astropy Collaboration et al. 2013), isochrones (Morton 2015), matplotlib (Hunter 2007), numpy (van der Walt et al. 2011), pandas (McKinney 2020).\n\nPublished - Matthews_2021_AJ_161_78.pdf
Accepted Version - 2012.03980.pdf
", "abstract": "Debris disk stars are good targets for high-contrast imaging searches for planetary systems, since debris disks have been shown to have a tentative correlation with giant planets. We selected 20 stars identified as debris disk hosts by the WISE mission, with particularly high levels of warm dust. We observed these with the VLT/SPHERE high-contrast imaging instrument with the goal of finding planets and imaging the disks in scattered light. Our survey reaches a median 5\u03c3 sensitivity of 10.4 M_J at 25 au and 5.9 M_J at 100 au. We identified three new stellar companions (HD 18378B, HD 19257B, and HD 133778B): two are mid-M-type stars and one is a late-K or early-M star. Three additional stars have very widely separated stellar companions (all at >2000 au) identified in the Gaia catalog. The stars hosting the three SPHERE-identified companions are all older (\u2273700 Myr), with one having recently left the main sequence and one a giant star. We infer that the high volumes of dust observed around these stars has been caused by a recent collision between the planets and planetesimal belts in the system, although for the most evolved star, mass loss could also be responsible for the infrared excess. Future mid-infrared spectroscopy or polarimetric imaging may allow the positions and spatial extent of these dust belts to be constrained, thereby providing evidence as to the true cause of the elevated levels of dust around these old systems. None of the disks in this survey is resolved in scattered light.", "date": "2021-02", "date_type": "published", "publication": "Astronomical Journal", "volume": "161", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 78", "id_number": "CaltechAUTHORS:20210121-101410608", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210121-101410608", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "757561" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/abcfca", "primary_object": { "basename": "2012.03980.pdf", "url": "https://authors.library.caltech.edu/records/cw8e2-hj904/files/2012.03980.pdf" }, "related_objects": [ { "basename": "Matthews_2021_AJ_161_78.pdf", "url": "https://authors.library.caltech.edu/records/cw8e2-hj904/files/Matthews_2021_AJ_161_78.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Matthews, Elisabeth C.; Hinkley, Sasha; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8pcry-cc616", "eprint_id": 107500, "eprint_status": "archive", "datestamp": "2023-08-22 08:25:48", "lastmod": "2023-10-23 15:57:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xie-Chengyan", "name": { "family": "Xie", "given": "Chengyan" }, "orcid": "0000-0001-8184-5547" }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Fang-Taotao", "name": { "family": "Fang", "given": "Taotao" }, "orcid": "0000-0002-2853-3808" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stolker-Tomas", "name": { "family": "Stolker", "given": "Tomas" }, "orcid": "0000-0002-5823-3072" } ] }, "title": "Spiral Arm Pattern Motion in the SAO 206462 Protoplanetary Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Protoplanetary disks; Coronagraphic imaging; Orbital motion; Planetary system formation", "note": "\u00a9 2021. The American Astronomical Society. \n\nReceived 2020 November 3; revised 2020 December 7; accepted 2020 December 8; published 2021 January 11. \n\nWe thank the anonymous referee for suggestions that increased the clarity and robustness of this Letter, and Jaehan Bae for useful discussions. T.F. and C.X. are supported by the National Key R&D Program of China No. 2017YFA0402600, project S202010384487 XMU Training Program of Innovation and Enterpreneurship for Undergraduate, and NSFC grants No. 11525312, 11890692. R.D. acknowledges financial support provided by the Natural Sciences and Engineering Research Council of Canada through a Discovery Grant, as well as the Alfred P. Sloan Foundation through a Sloan Research Fellowship. This research is partially supported by NASA ROSES XRP, award 80NSSC19K0294. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programs 095.C-0273 (A), 097.C-0702 (A), 097.C-0885 (A), and 297.C-5023 (A). Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacilities: VLT:Melipal (SPHERE) - , Keck:II (NIRC2) - , HST (NICMOS). - \n\nSoftware: IRDAP (van Holstein et al. 2020), diskmap (Stolker et al. 2016b), scipy (Virtanen et al. 2020).\n\nPublished - Xie_2021_ApJL_906_L9.pdf
Accepted Version - 2012.05242.pdf
", "abstract": "Spiral arms have been observed in more than a dozen protoplanetary disks, yet the origin of nearly all systems is under debate. Multi-epoch monitoring of spiral arm morphology offers a dynamical way to distinguish two leading arm formation mechanisms: companion-driven and gravitational instability induction, since these mechanisms predict distinct motion patterns. By analyzing multi-epoch J-band observations of the SAO 206462 system using the SPHERE instrument on the Very Large Telescope in 2015 and 2016, we measure the pattern motion for its two prominent spiral arms in polarized light. On one hand, if both arms are comoving, they can be driven by a planet at 86\u208b\u2081\u2083\u207a\u00b9\u2078 au on a circular orbit, with gravitational instability motion ruled out. On the other hand, they can be driven by two planets at 120\u208b\u2083\u2080\u207a\u00b3\u2070 au and 49\u208b\u2085\u207a\u2076 au, offering tentative evidence (3.0\u03c3) that the two spirals are moving independently. The independent arm motion is possibly supported by our analysis of a re-reduction of archival observations using the NICMOS instrument on board the Hubble Space Telescope (HST) in 1998 and 2005, yet artifacts including shadows can manifest spurious arm motion in HST observations. We expect future re-observations to better constrain the motion mechanism for the SAO 206462 spiral arms.", "date": "2021-01-10", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "906", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. L9", "id_number": "CaltechAUTHORS:20210114-164620409", "issn": "2041-8213", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210114-164620409", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Key Research and Development Program of China", "grant_number": "2017YFA0402600" }, { "agency": "Xiamen University", "grant_number": "S202010384487" }, { "agency": "National Natural Science Foundation of China", "grant_number": "11525312" }, { "agency": "National Natural Science Foundation of China", "grant_number": "11890692" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "Alfred P. Sloan Foundation" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "NASA", "grant_number": "NAS 5-26555" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/2041-8213/abd241", "primary_object": { "basename": "2012.05242.pdf", "url": "https://authors.library.caltech.edu/records/8pcry-cc616/files/2012.05242.pdf" }, "related_objects": [ { "basename": "Xie_2021_ApJL_906_L9.pdf", "url": "https://authors.library.caltech.edu/records/8pcry-cc616/files/Xie_2021_ApJL_906_L9.pdf" } ], "resource_type": "article", "pub_year": "2021", "author_list": "Xie, Chengyan; Ren, Bin; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4zcet-wcv85", "eprint_id": 107595, "eprint_status": "archive", "datestamp": "2023-08-20 01:09:09", "lastmod": "2024-01-15 21:20:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morris-Evan-C", "name": { "family": "Morris", "given": "Evan C." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Skemer-Andrew-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" } ] }, "title": "The Keck Planet Imager and Characterizer: Phase I fiber injection unit early performance and commissioning", "ispublished": "unpub", "full_text_status": "public", "keywords": "high contrast imaging, exoplanets, high dispersion coronography, high resolution spectroscopy, W.M. Keck Observatory", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144761.pdf
Published - SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf
Accepted Version - 2012.12318.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system and instrument suite with the goal of improving direct imaging and high-resolution spectroscopic characterization capabilities for giant exoplanets. KPIC Phase I includes a fiber injection unit (FIU) downstream of a new pyramid wavefront sensor, coupling planet light to a single mode fiber fed into NIRSPEC, Keck's high-resolution infrared spectrograph. This enables high-dispersion spectroscopy (HDS) of directly imaged exoplanets at smaller separation and higher contrast, improving our spectral characterization capabilities for these objects. Here, we report performance results from the KPIC Phase I FIU commissioning, including analysis of throughput, stability, and sensitivity of the instrument.", "date": "2020-12-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144761", "id_number": "CaltechAUTHORS:20210120-132611750", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210120-132611750", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2560852", "primary_object": { "basename": "1144761.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/1144761.pdf" }, "related_objects": [ { "basename": "2012.12318.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/2012.12318.pdf" }, { "basename": "SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/4zcet-wcv85/files/SPIE-AS20-427af017-0b04-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Morris, Evan C.; Wang, Jason J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/x2jd1-k6t60", "eprint_id": 107178, "eprint_status": "archive", "datestamp": "2023-08-20 00:54:57", "lastmod": "2024-01-15 18:16:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Guyon-Olivier", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Roberts-Mitsuko", "name": { "family": "Roberts", "given": "Mitsuko" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "An atmospheric dispersion corrector design with milliarcsecond-level precision from 1 to 4 microns for high dispersion coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "High dispersion coronagraphy, atmospheric dispersion corrector", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. J. Wang is supported by the Heising-Simons Foundation 51 Pegasi b postdoctoral fellowship. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144754.pdf
Submitted - 2012.06007.pdf
Presentation - SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf
", "abstract": "Differential atmospheric refraction (DAR) limits the amount of light that can be coupled into a single mode fiber and provides additional complications for any fiber tracking system. We present an atmospheric dispersion corrector (ADC) design based off of two counter-rotating prisms to fit the needs of exoplanet spectroscopy for the Keck Planet Imager and Characterizer (KPIC) from 1.1 to 4.2 microns. Due to strong telluric effects, we find that the default Zemax prescription for DAR between 2 and 4.2 microns to be inaccurate up to 15 mas when comparing against DAR models computed from first principles. Using first-principle models, we developed our own custom ADC optimization solution and achieve less than 4 mas residual dispersion in any individual science band (J, K, L) down to 60 degree zenith angles, while the whole time maintaining less than 3 mas of residual dispersion in the tracking band (H) and less than 2 mas of residual dispersion between the tracking and science bands.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144754", "id_number": "CaltechAUTHORS:20201217-151051056", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201217-151051056", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562654", "primary_object": { "basename": "1144754.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/1144754.pdf" }, "related_objects": [ { "basename": "2012.06007.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/2012.06007.pdf" }, { "basename": "SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/x2jd1-k6t60/files/SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Wang, Jason J.; Wallace, J. Kent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k9mjc-m6t70", "eprint_id": 107332, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:12", "lastmod": "2024-01-15 21:19:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meeker-Seth-R", "name": { "family": "Meeker", "given": "Seth R." } }, { "id": "Truong-Tuan-N", "name": { "family": "Truong", "given": "Tuan N." } }, { "id": "Roberts-Jennifer-E", "name": { "family": "Roberts", "given": "Jennifer E." } }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "J. Chris" }, "orcid": "0000-0001-8982-1654" }, { "id": "Fregoso-S-Felipe", "name": { "family": "Fregoso", "given": "S. Felipe" } }, { "id": "Burruss-Rick-S", "name": { "family": "Burruss", "given": "Rick S." } }, { "id": "Dekany-Richard-G", "name": { "family": "Dekany", "given": "Richard G." }, "orcid": "0000-0002-5884-7867" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Baker-John-W", "name": { "family": "Baker", "given": "John W." } }, { "id": "Heffner-Carolyn-M", "name": { "family": "Heffner", "given": "Carolyn M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Rykoski-Kevin-M", "name": { "family": "Rykoski", "given": "Kevin M." } }, { "id": "Tesch-Jonathan-A", "name": { "family": "Tesch", "given": "Jonathan A." } }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Design and performance of the PALM-3000 3.5 kHz upgrade", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Shack-Hartmann Wavefront Sensor, Electron Multiplying CCD, Real-time Control, Digital Signal Processors", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the excellent (and patient) support of the Palomar Observatory staff during this instrument upgrade, re-commissioning, and beyond as we worked to understand this new system. This research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 114480W.pdf
Submitted - 2012.08659.pdf
", "abstract": "PALM-3000 (P3K), the second-generation adaptive optics (AO) instrument for the 5.1 meter Hale telescope at Palomar Observatory, underwent a significant upgrade to its wavefront sensor (WFS) arm and real-time control (RTC) system in late 2019. Main features of this upgrade include an EMCCD WFS camera capable of 3.5 kHz framerates and advanced Digital Signal Processor (DSP) boards to replace the aging GPU based real-time control system. With this upgrade P3K is able to maintain a lock on natural guide stars fainter than mV=16. Here we present the design and on-sky re-commissioning results of the upgraded system.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114480W", "id_number": "CaltechAUTHORS:20210106-074923788", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210106-074923788", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2562931", "primary_object": { "basename": "114480W.pdf", "url": "https://authors.library.caltech.edu/records/k9mjc-m6t70/files/114480W.pdf" }, "related_objects": [ { "basename": "2012.08659.pdf", "url": "https://authors.library.caltech.edu/records/k9mjc-m6t70/files/2012.08659.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Meeker, Seth R.; Truong, Tuan N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ksm43-jqd87", "eprint_id": 107248, "eprint_status": "archive", "datestamp": "2023-08-20 00:56:15", "lastmod": "2024-01-15 18:17:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" } } ] }, "title": "Detecting and characterizing close-in exoplanets with vortex fiber nulling", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, Interferometry, Instrumentation, High Dispersion Coronagraphy, Keck Telescope, Fiber\nNulling", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nDaniel Echeverri is supported by a NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship under award #80NSSC19K1423. This work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1144619.pdf
Submitted - 2012.04239.pdf
", "abstract": "Vortex Fiber Nulling (VFN) is an interferometric method for suppressing starlight to detect and spectroscopically characterize exoplanets. It relies on a vortex phase mask and single-mode fiber to reject starlight while simultaneously coupling up to 20% of the planet light at separations of \u227e 1\u03bb/D, thereby enabling spectroscopic characterization of a large population of RV and transit-detected planets, among others, that are inaccessible to conventional coronagraphs. VFN has been demonstrated in the lab at visible wavelengths and here we present the latest results of these experiments. This includes polychromatic nulls of 5 10\u207b\u2074 in 10% bandwidth light centered around 790 nm. An upgraded testbed has been designed and is being built in the lab now; we also present a status update on that work here. Finally, we present preliminary K-band (2 micron) fiber nulling results with the infrared mask that will be used on-sky as part of a VFN mode for the Keck Planet Imager and Characterizer Instrument in 2021.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1144619", "id_number": "CaltechAUTHORS:20201222-074738306", "isbn": "9781510636798", "book_title": "Optical and Infrared Interferometry and Imaging VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201222-074738306", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "80NSSC19K1423" }, { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "80NM0018D0004" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Tuthill-Peter-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-Antoine", "name": { "family": "M\u00e9rand", "given": "Antoine" } }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Stephanie" } } ] }, "doi": "10.1117/12.2563142", "primary_object": { "basename": "1144619.pdf", "url": "https://authors.library.caltech.edu/records/ksm43-jqd87/files/1144619.pdf" }, "related_objects": [ { "basename": "2012.04239.pdf", "url": "https://authors.library.caltech.edu/records/ksm43-jqd87/files/2012.04239.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Echeverri, Daniel; Ruane, Garreth J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ed3ck-9rn59", "eprint_id": 107455, "eprint_status": "archive", "datestamp": "2023-08-20 00:59:55", "lastmod": "2023-10-23 15:55:10", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-Fabien", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Carbillet-Marcel", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Jolissaint-Laurent", "name": { "family": "Jolissaint", "given": "Laurent" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Antichi-Jacopo", "name": { "family": "Antichi", "given": "Jacopo" } } ] }, "title": "Discretized aperture mapping for wavefront sensing", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf
", "abstract": "DAM (Discretized Aperture Mapping) is an original filtering device able to improve the performance in high-angular resolution and high-contrast imaging by the present class of large telescopes equipped with adaptive optics (Patru et al. 2011, 2014, 2015). DAM is a high-spatial frequency filter able to remove the problematic phase errors produced by the small scale defects in the wavefront. Various effects are related to high-order aberrations (ie the high-spatial frequency content) which are neither seen by any wavefront sensor (WFS) nor corrected by any adaptive optics (AO) and is thus transmitted up to the final detector. In particular, any wavefront sensor, due to its finite sub-apertures size, is fundamentally limited by the well-known aliasing effect, where high-spatial frequencies are seen as spurious low frequencies. DAM can be used as an anti-aliasing filter in order to improve both the accuracy of the WFS measurements and the stability of the AO compensation.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114462Z", "id_number": "CaltechAUTHORS:20210113-113126221", "isbn": "9781510636798", "book_title": "Optical and Infrared Interferometry and Imaging VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210113-113126221", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Tuthill-Peter-G", "name": { "family": "Tuthill", "given": "Peter G." } }, { "id": "M\u00e9rand-Antoine", "name": { "family": "M\u00e9rand", "given": "Antoine" } }, { "id": "Sallum-Stephanie", "name": { "family": "Sallum", "given": "Stephanie" } } ] }, "doi": "10.1117/12.2564820", "primary_object": { "basename": "SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/ed3ck-9rn59/files/SPIE-AS20-8d319140-ca16-ea11-813d-005056be4d05.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Patru, Fabien; Carbillet, Marcel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pzq9q-8b792", "eprint_id": 107247, "eprint_status": "archive", "datestamp": "2023-08-20 00:56:08", "lastmod": "2024-01-15 18:16:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "N." }, "orcid": "0000-0001-5213-6207" }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "B." } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "M." }, "orcid": "0000-0003-3168-5586" }, { "id": "Schofield-Tobias", "name": { "family": "Schofield", "given": "T." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Roberts-Mitsuko", "name": { "family": "Roberts", "given": "M." } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. K." }, "orcid": "0000-0001-5299-6899" }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "R." } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "J." } }, { "id": "Colborn-Jennah-K", "name": { "family": "Colborn", "given": "J." } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "J. R." }, "orcid": "0000-0001-8953-1008" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "R." }, "orcid": "0000-0003-0054-2953" } ] }, "title": "Enhanced high-dispersion coronagraphy with KPIC phase II: design, assembly and status of sub-modules", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, high contrast imaging, exoplanets, high dispersion coronography, high resolution\nspectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. G. Ruane was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testing. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 114474U.pdf
Published - SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf
Submitted - 2012.06638.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument for high-dispersion coronagraphy in the K and L bands on Keck. This instrument will provide the first high resolution (R>30,000) spectra of known directly imaged exoplanets and low-mass brown dwarf companions visible in the northern hemisphere. KPIC is developed in phases. Phase I is currently at Keck in the early operations stage, and the phase II upgrade will deploy in late 2021. The goal of phase II is to maximize the throughput for planet light and minimize the stellar leakage, hence reducing the exposure time needed to acquire spectra with a given signal-to- noise ratio. To achieve this, KPIC phase II exploits several innovative technologies that have not been combined this way before. These include a 1000-element deformable mirror for wavefront correction and speckle control, a set of lossless beam shaping optics to maximize coupling into the fiber, a pupil apodizer to suppress unwanted starlight, a pupil plane vortex mask to enable the acquisition of spectra at and within the diffraction limit, and an atmospheric dispersion compensator. These modules, when combined with the active fiber injection unit present in phase I, will make for a highly efficient exoplanet characterization platform. In this paper, we will present the final design of the optics and opto-mechanics and highlight some innovative solutions we implemented to facilitate all the new capabilities. We will provide an overview of the assembly and laboratory testing of the sub-modules and some of the results. Finally, we will outline the deployment timeline.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114474U", "id_number": "CaltechAUTHORS:20201222-073413143", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201222-073413143", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "Heising-Simons Foundation", "grant_number": "2015-129" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2563107", "primary_object": { "basename": "114474U.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/114474U.pdf" }, "related_objects": [ { "basename": "2012.06638.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/2012.06638.pdf" }, { "basename": "SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/pzq9q-8b792/files/SPIE-AS20-419b45fb-7406-ea11-813d-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Jovanovic, N.; Calvin, B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3z2mp-w5d91", "eprint_id": 107384, "eprint_status": "archive", "datestamp": "2023-08-22 08:00:43", "lastmod": "2024-01-15 21:20:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cantalloube-Faustine", "name": { "family": "Cantalloube", "given": "F." }, "orcid": "0000-0002-3968-3780" }, { "id": "Gomez-Gonzalez-Carlos", "name": { "family": "Gomez-Gonzalez", "given": "C." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Cantero-Carles", "name": { "family": "Cantero", "given": "C." } }, { "id": "Bacher-Regis", "name": { "family": "Bacher", "given": "R." } }, { "id": "Bonse-J-Markus", "name": { "family": "Bonse", "given": "J. M." } }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Dahlqvist-Carl-Henrik", "name": { "family": "Dahlqvist", "given": "C.-H." }, "orcid": "0000-0003-4994-9244" }, { "id": "Desgrange-C\u00e9lia", "name": { "family": "Desgrange", "given": "C." } }, { "id": "Flasseur-Olivier", "name": { "family": "Flasseur", "given": "O." } }, { "id": "Fuhrmann-Thomas", "name": { "family": "Fuhrmann", "given": "T." }, "orcid": "0000-0002-6824-0479" }, { "id": "Henning-Thomas-H", "name": { "family": "Henning", "given": "Th." }, "orcid": "0000-0002-1493-300X" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "R." }, "orcid": "0000-0003-0054-2953" }, { "id": "Kenworthy-Matthew-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mesa-Dino", "name": { "family": "Mesa", "given": "D." }, "orcid": "0000-0001-8467-1933" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "T." }, "orcid": "0000-0001-6126-2467" }, { "id": "Mouillet-David", "name": { "family": "Mouillet", "given": "D." } }, { "id": "M\u00fcller-Andr\u00e9", "name": { "family": "M\u00fcller", "given": "A." } }, { "id": "Nasedkin-Evert", "name": { "family": "Nasedkin", "given": "E." }, "orcid": "0000-0002-9792-3121" }, { "id": "Pairet-Beno\u00eet", "name": { "family": "Pairet", "given": "B." }, "orcid": "0000-0002-8731-033X" }, { "id": "Pi\u00e9rard-S\u00e9bastien", "name": { "family": "Pi\u00e9rard", "given": "S." }, "orcid": "0000-0001-8076-1157" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "J.-B." }, "orcid": "0000-0003-2233-4821" }, { "id": "Samland-Matthias", "name": { "family": "Samland", "given": "M." }, "orcid": "0000-0001-9992-4067" }, { "id": "Stone-Jordan", "name": { "family": "Stone", "given": "J." }, "orcid": "0000-0003-0454-3718" }, { "id": "Van-Droogenbroeck-Marc", "name": { "family": "Van Droogenbroeck", "given": "M." }, "orcid": "0000-0001-6260-6487" } ] }, "title": "Exoplanet imaging data challenge: benchmarking the various image processing methods for exoplanet detection", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanet detection; High-contrast imaging; Adaptive Optics; Coronagraphy; Post-processing techniques; Data challenge", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe EIDC collaboration would like to thank the GPIES collaboration and the SHINE collaboration, for providing us the pre-reduced data from Gemini/GPI and VLT/SPHERE respectively. This research has benefited from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/~adam/browndwarfs/spexprism. This work was supported by the Fonds de la Recherche Scientifique-FNRS under Grant n F.4504.18 and by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement n 819155). T.H. acknowledges support from the European Research Council under the Horizon 2020 Framework Program via the ERC Advanced Grant Origins 832428.\n\nPublished - 114485A.pdf
Published - SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf
Accepted Version - 2101.05080.pdf
", "abstract": "The Exoplanet Imaging Data Challenge is a community-wide effort meant to offer a platform for a fair and common comparison of image processing methods designed for exoplanet direct detection. For this purpose, it gathers on a dedicated repository (Zenodo), data from several high-contrast ground-based instruments worldwide in which we injected synthetic planetary signals. The data challenge is hosted on the CodaLab competition platform, where participants can upload their results. The specifications of the data challenge are published on our website https://exoplanet-imaging-challenge.github.io/. The first phase, launched on the 1st of September 2019 and closed on the 1st of October 2020, consisted in detecting point sources in two types of common data-set in the field of high-contrast imaging: data taken in pupil-tracking mode at one wavelength (subchallenge 1, also referred to as ADI) and multispectral data taken in pupil-tracking mode (subchallenge 2, also referred to as ADI+mSDI). In this paper, we describe the approach, organisational lessons-learnt and current limitations of the data challenge, as well as preliminary results of the participants' submissions for this first phase. In the future, we plan to provide permanent access to the standard library of data sets and metrics, in order to guide the validation and support the publications of innovative image processing algorithms dedicated to high-contrast imaging of planetary systems.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114485A", "id_number": "CaltechAUTHORS:20210108-143245499", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210108-143245499", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)", "grant_number": "F.4504.18" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "European Research Council (ERC)", "grant_number": "832428" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2574803", "primary_object": { "basename": "114485A.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/114485A.pdf" }, "related_objects": [ { "basename": "2101.05080.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/2101.05080.pdf" }, { "basename": "SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/3z2mp-w5d91/files/SPIE-AS20-ec33ebe5-faa3-ea11-8143-005056be4d05.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Cantalloube, F.; Gomez-Gonzalez, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/djy9b-59w24", "eprint_id": 107385, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:57", "lastmod": "2024-01-15 21:20:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mejia-Prada-Camilo", "name": { "family": "Mejia Prada", "given": "Camilo" } }, { "id": "Baxter-Wesley", "name": { "family": "Baxter", "given": "Wesley" } }, { "id": "Bendek-Eduardo-A", "name": { "family": "Bendek", "given": "Eduardo" }, "orcid": "0000-0002-9408-8925" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riggs-A-J-Eldorado", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" } ] }, "title": "Experimental analysis of the achromatic performance of a vector vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, coronagraphs", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 114432O.pdf
Submitted - 2012.07728.pdf
", "abstract": "The vector vortex coronagraph is an instrument designed for direct detection and spectroscopy of exoplanets over a broad spectral range. Our team is working towards demonstrating contrast performance commensurate with imaging temperate, terrestrial planets orbiting solar-type stars using the High Contrast Imaging Testbed facility at NASA's Jet Propulsion Laboratory. To date, the best broadband performance achieved is ~10\u207b\u2078 raw contrast over a bandwidth of \u0394\u03bb/\u03bb=10% in the visible regime (central wavelengths of 550 nm-750 nm), while monochromatic tests yield much deeper contrast (~10\u207b\u2079 or better). In this study, we analyze the main performance limitations on the testbeds so far, focusing on the quality of the focal plane mask manufacturing. We measure the polarization properties of the masks and the residual electric field in the dark hole as a function of wavelength. Our results suggest that the current performance is limited by localized defects in the in the focal plane masks. A new generation of masks is under test that have fewer defects and promise performance improvements.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114432O", "id_number": "CaltechAUTHORS:20210108-145720027", "isbn": "9781510636736", "book_title": "Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210108-145720027", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-Makenzie", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." } }, { "id": "Batalha-Natalie-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-Nicholas", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2561593", "primary_object": { "basename": "114432O.pdf", "url": "https://authors.library.caltech.edu/records/djy9b-59w24/files/114432O.pdf" }, "related_objects": [ { "basename": "2012.07728.pdf", "url": "https://authors.library.caltech.edu/records/djy9b-59w24/files/2012.07728.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Ruane, Garreth; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bv83h-wpd64", "eprint_id": 107135, "eprint_status": "archive", "datestamp": "2023-08-20 00:53:52", "lastmod": "2024-01-15 18:15:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Mouillet-David", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Bidot-Alexis", "name": { "family": "Bidot", "given": "Alexis" } }, { "id": "Bourdarot-Guillaume", "name": { "family": "Bourdarot", "given": "Guillaume" }, "orcid": "0000-0002-6777-6386" }, { "id": "Correia-Jean-Jacques", "name": { "family": "Correia", "given": "Jean-Jacques" } }, { "id": "Jocou-Laurent", "name": { "family": "Jocou", "given": "Laurent" }, "orcid": "0000-0001-9376-1818" }, { "id": "Delboulb\u00e9-Alain", "name": { "family": "Delboulb\u00e9", "given": "Alain" } }, { "id": "le-Coarer-Etienne-P", "name": { "family": "Le Coarer", "given": "Etienne P." }, "orcid": "0000-0001-6571-5494" }, { "id": "Doyon-Ren\u00e9", "name": { "family": "Doyon", "given": "Ren\u00e9" }, "orcid": "0000-0001-5485-4675" }, { "id": "Artigau-\u00c9tienne", "name": { "family": "Artigau", "given": "\u00c9tienne" }, "orcid": "0000-0003-3506-5667" }, { "id": "Vall\u00e9e-Philippe", "name": { "family": "Vall\u00e9e", "given": "Philippe" } }, { "id": "Roux-Alain", "name": { "family": "Roux", "given": "Alain" } }, { "id": "Feautrier-Philippe", "name": { "family": "Feautrier", "given": "Philippe" } }, { "id": "Rabou-Patrick", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Forveille-Thierry", "name": { "family": "Forveille", "given": "Thierry" }, "orcid": "0000-0003-0536-4607" }, { "id": "Bonfils-Xavier", "name": { "family": "Bonfils", "given": "Xavier" }, "orcid": "0000-0001-9003-8894" }, { "id": "Lo-Casio-Guillaume", "name": { "family": "Lo-Cascio", "given": "Guillaume" } }, { "id": "Parthasarathy-Ambarish", "name": { "family": "Parthasarathy", "given": "Ambarish" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Vigan-Arthur", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Otten-Gilles", "name": { "family": "Otten", "given": "Gilles" }, "orcid": "0000-0002-6717-1977" } ] }, "title": "High-resolution spectroscopy of diffraction-limited sources: laboratory tests of an innovative near-IR demonstrator", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 SPIE.", "abstract": "Current high-resolution spectrometers have been designed for seeing-limited sources. Designing a spectrometer for diffraction-limited sources makes it possible to significantly improves its compacity and cost, but it also opens up new concepts, including better efficiency, and adaptability to various spectral domains, and up to very high resolution (several 10\u2075). A novel, near-IR, R~80000 spectrometer has been developed at IPAG to characterize two sources at once in the H or K bands. Its design is based on a virtually imaged phased array instead of an \u00e9chelle grating, which allows the spectrometer to fit inside a 0.2 m\u00b3 cryostat, and results in a gain in throughput with respect to usual \u00e9chelle spectrographs. One specific science case that can benefit from this new type of design is the characterization of exoplanets' atmosphere. This paper presents the results of its test in the laboratory, as well as the preparation for an on-sky demonstration tentatively scheduled for summer 2020.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114512B", "id_number": "CaltechAUTHORS:20201216-152239703", "isbn": "9781510636897", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201216-152239703", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Navarro-Ram\u00f3n", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Geyl-Roland", "name": { "family": "Geyl", "given": "Roland" } } ] }, "doi": "10.1117/12.2560666", "resource_type": "book_section", "pub_year": "2020", "author_list": "Carlotti, Alexis; Mouillet, David; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/y39mc-9jg33", "eprint_id": 107367, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:36", "lastmod": "2024-01-15 21:19:53", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Chin-Jason-C-Y", "name": { "family": "Chin", "given": "J." } }, { "id": "Correia-Carlos", "name": { "family": "Correia", "given": "C." }, "orcid": "0000-0002-6996-0734" }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "J." }, "orcid": "0000-0001-9611-0009" }, { "id": "Brown-Thomas-M", "name": { "family": "Brown", "given": "T." }, "orcid": "0000-0002-1793-9968" }, { "id": "Casey-Kelleen", "name": { "family": "Casey", "given": "K." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "S." } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "J-R." }, "orcid": "0000-0001-8953-1008" }, { "id": "Gers-Luke", "name": { "family": "Gers", "given": "L." } }, { "id": "Hunter-Lisa", "name": { "family": "Hunter", "given": "L." } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "S." } }, { "id": "Surendran-Avinash", "name": { "family": "Surendran", "given": "A." } }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "E." } }, { "id": "Ghez-Andrea-M", "name": { "family": "Ghez", "given": "A." }, "orcid": "0000-0003-3230-5055" }, { "id": "Do-Tuan", "name": { "family": "Do", "given": "T." }, "orcid": "0000-0001-9554-6062" }, { "id": "Jones-Tucker", "name": { "family": "Jones", "given": "T." }, "orcid": "0000-0001-5860-3419" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "M." }, "orcid": "0000-0003-2232-7664" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Max-Claire-E", "name": { "family": "Max", "given": "C." }, "orcid": "0000-0003-0682-5436" }, { "id": "Morris-Mark-R", "name": { "family": "Morris", "given": "M." }, "orcid": "0000-0002-6753-2066" }, { "id": "Treu-Tommaso", "name": { "family": "Treu", "given": "T." }, "orcid": "0000-0002-8460-0390" }, { "id": "Wright-Shelley-A", "name": { "family": "Wright", "given": "S." }, "orcid": "0000-0003-1034-8054" } ] }, "title": "Keck all sky precision adaptive optics: project overview", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, laser tomography, near-infrared sensing, PSF reconstruction", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Funding support for the KAPA system provided by the National Science Foundation Mid Scale Innovations Program award AST-1836016 (PI: Wizinowich). The Keck II real-time controller is funded by the NSF Major Research for Instrumentation Program award AST-1727071 (Wizinowich). Funding support for the KAPA science programs is provided by the Gordon and Betty Moore Foundation through awards to UH (Liu), UCSD (Wright) and two awards to UCLA (Ghez and Treu), and sub-awards to CIT (Mawet), UCB (Lu) and UCD (Jones). Funding support for the AstroTech instrumentation intensive is provided by the Heising-Simons Foundation through UCSC (Hunter) and UCB (Lu). The turbulence simulator is supported by a grant from R. Simperman.\n\nPublished - 114480E.pdf
", "abstract": "We present the status and plans for the Keck All sky Precision Adaptive optics (KAPA) program. KAPA includes four key science programs, an upgrade to the Keck I laser guide star (LGS) adaptive optics (AO) facility to improve image quality and sky coverage, AO telemetry based point spread function (PSF) estimates for all science exposures, and an educational component focused on broadening the participation of women and underrepresented groups in instrumentation. For the purpose of this conference we will focus on the AO facility upgrade which includes implementation of a new laser, wavefront sensor and real-time controller to support laser tomography, the laser tomography system itself, and modifications to an existing near-infrared tip-tilt sensor to support multiple natural guide star (NGS) and focus measurements.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114480E", "id_number": "CaltechAUTHORS:20210107-132137961", "isbn": "9781510636835", "book_title": "Adaptive Optics Systems VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210107-132137961", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1836016" }, { "agency": "NSF", "grant_number": "AST-1727071" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Heising-Simons Foundation" }, { "agency": "R. Simperman" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Schreiber-Laura", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-Dirk", "name": { "family": "Schmidt", "given": "Dirk" } }, { "id": "Vernet-Elise", "name": { "family": "Vernet", "given": "Elise" } } ] }, "doi": "10.1117/12.2560017", "primary_object": { "basename": "114480E.pdf", "url": "https://authors.library.caltech.edu/records/y39mc-9jg33/files/114480E.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Wizinowich, P.; Chin, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5zq13-skd02", "eprint_id": 107298, "eprint_status": "archive", "datestamp": "2023-08-20 00:57:57", "lastmod": "2024-01-15 21:19:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" }, "orcid": "0000-0001-8953-1008" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-James-Kent", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall D." } }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "name": { "family": "Ragland", "given": "Sam" }, "orcid": "0000-0002-0696-1780" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean Baptist" }, "orcid": "0000-0003-2233-4821" }, { "name": { "family": "Lilley", "given": "Scott" } }, { "name": { "family": "Wetherell", "given": "Edward" } }, { "name": { "family": "Doppmann", "given": "Greg" } }, { "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Shofield-Tobias", "name": { "family": "Shofield", "given": "Tobias" } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "name": { "family": "Morris", "given": "Evan" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "name": { "family": "Magnone", "given": "Ken" } }, { "name": { "family": "Johnson", "given": "Chris" } }, { "name": { "family": "Shohn", "given": "Jiman" } }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "name": { "family": "Chun", "given": "Mark" }, "orcid": "0000-0002-8462-0703" }, { "name": { "family": "Suominen", "given": "Nick" } }, { "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" } ] }, "title": "The Keck Planet Imager and Characterizer: A dedicated single-mode fiber injection unit for high resolution exoplanet spectroscopy", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, W. M. Keck Observatory, Exoplanets, High contrast imaging, High dispersion coronagraphy, High resolution spectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported by the Heising-Simons Foundation through grant #2019-1312. W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 114471P.pdf
Submitted - 2107.12556.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument to demonstrate new tech- nological and instrumental concepts initially developed for the exoplanet direct imaging field. Located downstream of the current Keck II adaptive optic system, KPIC contains a fiber injection unit (FIU) capable of combining the high-contrast imaging capability of the adaptive optic system with the high dispersion spectroscopy capability of the current Keck high resolution infrared spectrograph (NIRSPEC). Deployed at Keck in September 2018, this instrument has already been used to acquire high resolution spectra (R < 35, 000) of multiple targets of interest. In the near term, it will be used to spectrally characterize known directly imaged exoplanets and low-mass brown dwarf companions visible in the northern hemisphere with a spectral resolution high enough to enable spin and planetary radial velocity measurements as well as Doppler imaging of atmospheric weather phenomena. Here we present the design of the FIU, the unique calibration procedures needed to operate a single-mode fiber instrument and the system performance.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114471P", "id_number": "CaltechAUTHORS:20210104-152311891", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210104-152311891", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "2019-1312" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562836", "primary_object": { "basename": "114471P.pdf", "url": "https://authors.library.caltech.edu/records/5zq13-skd02/files/114471P.pdf" }, "related_objects": [ { "basename": "2107.12556.pdf", "url": "https://authors.library.caltech.edu/records/5zq13-skd02/files/2107.12556.pdf" } ], "resource_type": "book_section", "pub_year": "2020", "author_list": "Delorme, Jacques-Robert; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6y83w-p3z28", "eprint_id": 107137, "eprint_status": "archive", "datestamp": "2023-08-20 00:54:00", "lastmod": "2024-01-15 18:16:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Chisholm-Eric-M", "name": { "family": "Chisholm", "given": "Eric M." } }, { "id": "Larkin-James-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Wright-Shelley-A", "name": { "family": "Wright", "given": "Shelley A." }, "orcid": "0000-0003-1034-8054" }, { "id": "Miles-John-W", "name": { "family": "Miles", "given": "John" } }, { "id": "Liu-Fengchuan", "name": { "family": "Liu", "given": "Fengchuan" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Thirty Meter Telescope: A status update on the first light instruments and the path beyond into early light instruments", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 SPIE.", "abstract": "This paper presents an overview of the suite of science instruments envisioned for the Thirty Meter Telescope. Specifically, the we'll explore the evolution within our first light and first decade instruments.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114471V", "id_number": "CaltechAUTHORS:20201216-152240176", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201216-152240176", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-J-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2559576", "resource_type": "book_section", "pub_year": "2020", "author_list": "Chisholm, Eric M.; Larkin, James E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7k36a-36n04", "eprint_id": 107342, "eprint_status": "archive", "datestamp": "2023-08-20 00:58:17", "lastmod": "2024-01-15 21:19:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-Jorge-D", "name": { "family": "Llop-Sayson", "given": "Jorge" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Morrissey-Grady", "name": { "family": "Morrissey", "given": "Grady" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Wavefront control experiments with a single mode fiber at the High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST)", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Wavefront Control, Wavefront Sensing, Spectroscopy", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was partially supported by the National Science Foundation AST-ATI Grant 1710210.\n\nPublished - 114432Q.pdf
", "abstract": "Achieving high levels of contrast over broad bandwidths with segmented aperture telescopes is a key requirement to maximize the scientific yield for future exoplanet imaging missions and ground-based extremely large telescopes. The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to proof test new technologies aimed at tackling some of the most pressing and challenging goals of exoplanet science, namely the imaging and spectroscopic characterization of small planets across a wide range of stellar host types, including temperature Earth-size planets. Here we report on the status of a key milestone: Demonstration of 20% bandwidth nulling experiments using single mode fibers wavefront control.", "date": "2020-12-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114432Q", "id_number": "CaltechAUTHORS:20210106-103901413", "isbn": "9781510636736", "book_title": "Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210106-103901413", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Makenzie-Lystrup", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." } }, { "id": "Batalha-Natalie-M", "name": { "family": "Batalha", "given": "Natalie M." } }, { "id": "Siegler-Nicholas", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2562973", "primary_object": { "basename": "114432Q.pdf", "url": "https://authors.library.caltech.edu/records/7k36a-36n04/files/114432Q.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Llop-Sayson, Jorge; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/w08bd-k8638", "eprint_id": 106830, "eprint_status": "archive", "datestamp": "2023-08-22 07:50:34", "lastmod": "2023-10-20 23:50:50", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Hashimoto-Jun", "name": { "family": "Hashimoto", "given": "Jun" }, "orcid": "0000-0002-3053-3575" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Muto-Takayuki", "name": { "family": "Muto", "given": "Takayuki" } }, { "id": "Ruffio-Jean-Baptiste", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Wallack-Nicole-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "id": "Baranec-Christoph", "name": { "family": "Baranec", "given": "Christoph" }, "orcid": "0000-0002-1917-9157" }, { "id": "Bowler-Brendan-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Chun-Mark", "name": { "family": "Chun", "given": "Mark" }, "orcid": "0000-0002-8462-0703" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Fogarty-Kevin", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "id": "Guyon-Olivier", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Meshkat-Tiffany", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Ygouf-Marie", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "id": "Zuckerman-Benjamin", "name": { "family": "Zuckerman", "given": "Benjamin" }, "orcid": "0000-0001-6809-3045" } ] }, "title": "Early High-contrast Imaging Results with Keck/NIRC2-PWFS: The SR 21 Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Coronagraphic imaging; Protoplanetary disks", "note": "\u00a9 2020 The American Astronomical Society.\n\nReceived 2020 September 27; revised 2020 October 29; accepted 2020 October 30; published 2020 November 23.\n\nThe authors would like to thank the anonymous referee for the constructive comments to improve the clarity of the manuscript. We thank Christian Ginski for sharing the updated detection limit of the archival Keck/NIRC2 data. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO program 1100.C-0481(Q). This research has made use of NASA's Astrophysics Data System Bibliographic Services. This research has made use of the SIMBAD database (Wenger et al. 2000), operated at CDS, Strasbourg, France. This research has made use of the VizieR catalog access tool, CDS, Strasbourg, France (doi:10.26093/cds/vizier). The original description of the VizieR service was published in Ochsenbein et al. (2000).\n\nT.U. acknowledges JSPS overseas research fellowship. M.L. acknowledges funding from the National Science Foundation under grants AST-1518339. The Keck infrared pyramid wave front sensor was developed with support from the National Science Foundation under grants AST-1611623 and AST-1106391, as well as the Heising Simons Foundation under the Keck Planet Imager and Characterizer project. This research is partially supported by NASA ROSES XRP, award 80NSSC19K0294. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nWe wish to acknowledge the critical importance of the current and recent Maunakea Observatories day crew, technicians, telescope operators, computer support, and office staff employees, especially during the challenging times presented by the COVID-19 pandemic. Their expertise, ingenuity, and dedication is indispensable to the continued successful operation of these observatories. The authors wish to acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nFacility: Keck:II (NIRC2). -\n\nSoftware: pyKLIP (Wang et al. 2015), IRDAP (van Holstein et al. 2017, 2020).\n\nPublished - Uyama_2020_AJ_160_283.pdf
Accepted Version - 2011.00044.pdf
", "abstract": "High-contrast imaging of exoplanets and protoplanetary disks depends on wave front sensing and correction made by adaptive optics instruments. Classically, wave front sensing has been conducted at optical wavelengths, which made high-contrast imaging of red targets such as M-type stars or extincted T Tauri stars challenging. Keck/NIRC2 has combined near-infrared (NIR) detector technology with the pyramid wave front sensor (PWFS). With this new module we observed SR 21, a young star that is brighter at NIR wavelengths than at optical wavelengths. Compared with the archival data of SR 21 taken with the optical wave front sensing we achieved ~20% better Strehl ratio in similar natural seeing conditions. Further post-processing utilizing angular differential imaging and reference-star differential imaging confirmed the spiral feature reported by the Very Large Telescope/Spectro-Polarimetric High-contrast Exoplanet REsearch instrument polarimetric observation, which is the first detection of the SR 21 spiral in total intensity at L' band. We also compared the contrast limit of our result (10\u207b\u2074 at 0.\"4 and 2 \u00d7 10\u207b\u2075 at 1.\"0) with the archival data that were taken with optical wave front sensing and confirmed the improvement, particularly at \u22640.\"5. Our observation demonstrates that the NIR PWFS improves AO performance and will provide more opportunities for red targets in the future.", "date": "2020-12", "date_type": "published", "publication": "Astronomical Journal", "volume": "160", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 283", "id_number": "CaltechAUTHORS:20201125-133727971", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201125-133727971", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Japan Society for the Promotion of Science (JSPS)" }, { "agency": "NSF", "grant_number": "AST-1518339" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising Simons Foundation" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/abc69a", "primary_object": { "basename": "2011.00044.pdf", "url": "https://authors.library.caltech.edu/records/w08bd-k8638/files/2011.00044.pdf" }, "related_objects": [ { "basename": "Uyama_2020_AJ_160_283.pdf", "url": "https://authors.library.caltech.edu/records/w08bd-k8638/files/Uyama_2020_AJ_160_283.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Uyama, Taichi; Ren, Bin; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hj4ph-s2x41", "eprint_id": 107648, "eprint_status": "archive", "datestamp": "2023-08-20 00:42:41", "lastmod": "2024-01-15 21:20:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Tinyanont-Samaporn", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Milburn-Jennifer-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "Michael" }, "orcid": "0000-0003-3168-5586" }, { "id": "Palatnick-Skyler", "name": { "family": "Palatnick", "given": "Skyler" } } ] }, "title": "WIRC-POL: 0.1% polarimetric precision on-sky with the installation of a HWP modulator", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf
", "abstract": "WIRC+Pol is a J and H-band linear spectropolarimetric mode for the prime-focus WIRC camera at the Palomar 200-inch Hale telescope. The mode is enabled by a split-pupil polarization grating that allows for the simultaneous measurement of Stokes Q and U without the use of a modulator at a seeing-limited spectral resolving power of ~100. To overcome time-dependent instrumental polarization effects that limited the calibration of instrumental polarization to a ~1% level, in February 2019 we installed a linear polarizer and half-wave plate modulator in front of the instrument, both of which are rotatable. With these two new optics, we are now able to calibrate the instrumental polarization to less than 0.1%. Here we report on WIRC+Pol's post-upgrade on-sky performance, including a polarimetric instrument model that we characterize as a function of time and focal-plane location.", "date": "2020-12", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 114475Y", "id_number": "CaltechAUTHORS:20210122-074904083", "isbn": "9781510636811", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210122-074904083", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-Christopher-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Bryant-Julia-J", "name": { "family": "Bryant", "given": "Julia J." } }, { "id": "Motohara-Kentaro", "name": { "family": "Motohara", "given": "Kentaro" } } ] }, "doi": "10.1117/12.2562762", "primary_object": { "basename": "SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf", "url": "https://authors.library.caltech.edu/records/hj4ph-s2x41/files/SPIE-AS20-8e4f6a5e-4d06-ea11-813d-005056be4d05.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Millar-Blanchaer, Maxwell A.; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kb2sq-8w336", "eprint_id": 106059, "eprint_status": "archive", "datestamp": "2023-08-22 06:50:25", "lastmod": "2023-10-20 23:03:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Bendek-E-A", "name": { "family": "Bendek", "given": "Eduardo" }, "orcid": "0000-0002-9408-8925" }, { "id": "Kern-B-D", "name": { "family": "Kern", "given": "Brian D." } }, { "id": "Marx-David-S", "name": { "family": "Marx", "given": "David" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Prada-C-M", "name": { "family": "Prada", "given": "Camilo M." } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Seo-Byoung-Joon", "name": { "family": "Seo", "given": "Byoung-Joon" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Microelectromechanical deformable mirror development for high-contrast imaging, part 2: the impact of quantization errors on coronagraph image contrast", "ispublished": "pub", "full_text_status": "public", "keywords": "exoplanets; direct detection; coronagraphs; deformable mirrors; actuators; adaptive optics; wavefronts", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPaper 20027 received Mar. 13, 2020; accepted for publication Aug. 6, 2020; published online Oct. 7, 2020. \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 045002_1.pdf
Accepted Version - 2010.03704.pdf
", "abstract": "Stellar coronagraphs rely on deformable mirrors (DMs) to correct wavefront errors and create high-contrast images. Imperfect control of the DM limits the achievable contrast, and therefore, the DM control electronics must provide fine surface height resolution and low noise. We study the impact of quantization errors due to the DM electronics on the image contrast using experimental data from the High Contrast Imaging Testbed facility at NASA's Jet Propulsion Laboratory. We find that the simplest analytical model gives optimistic predictions compared to real cases, with contrast up to 3 times better, which leads to DM surface height resolution requirements that are incorrectly relaxed by 70%. We show that taking into account the DM actuator shape, or influence function, improves the analytical predictions. However, we also find that end-to-end numerical simulations of the wavefront sensing and control process provide the most accurate predictions and recommend such an approach for setting robust requirements on the DM control electronics. From our experimental and numerical results, we conclude that a surface height resolution of \u223c6\u2009\u2009pm is required for imaging temperate terrestrial exoplanets around solar-type stars at wavelengths as small as 450 nm with coronagraph instruments on future space telescopes. Finally, we list the recognizable characteristics of quantization errors that may help determine if they are a limiting factor.", "date": "2020-10", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "6", "number": "4", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 045002", "id_number": "CaltechAUTHORS:20201014-111856081", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201014-111856081", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.jatis.6.4.045002", "primary_object": { "basename": "2010.03704.pdf", "url": "https://authors.library.caltech.edu/records/kb2sq-8w336/files/2010.03704.pdf" }, "related_objects": [ { "basename": "045002_1.pdf", "url": "https://authors.library.caltech.edu/records/kb2sq-8w336/files/045002_1.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Ruane, Garreth; Echeverri, Daniel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/v36st-xdt23", "eprint_id": 107871, "eprint_status": "archive", "datestamp": "2023-08-22 06:25:14", "lastmod": "2023-10-23 16:18:12", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Maire-Anne-Lise", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" }, "orcid": "0000-0002-1342-2822" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Zins-G\u00e9rard", "name": { "family": "Zins", "given": "G\u00e9rard" }, "orcid": "0000-0002-2935-7404" }, { "id": "Kasper-Markus", "name": { "family": "Kasper", "given": "Markus" }, "orcid": "0000-0002-8425-6606" }, { "id": "Delacroix-Christian", "name": { "family": "Delacroix", "given": "Christian" }, "orcid": "0000-0003-0150-4430" }, { "id": "Leveratto-Serban", "name": { "family": "Leveratto", "given": "Serban" } }, { "id": "Karlsson-Mikael", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "K\u00e4ufl-Hans-Ulrich", "name": { "family": "K\u00e4ufl", "given": "Hans-Ulrich" }, "orcid": "0000-0002-8806-9795" }, { "id": "Orban-de-Xivry-Gilles", "name": { "family": "Orban de Xivry", "given": "Gilles" }, "orcid": "0000-0002-4790-415X" }, { "id": "Pathak-Prashant", "name": { "family": "Pathak", "given": "Prashant" }, "orcid": "0000-0003-3991-6107" }, { "id": "Pettazzi-Lorenzo", "name": { "family": "Pettazzi", "given": "Lorenzo" } }, { "id": "Duhoux-Philippe-R", "name": { "family": "Duhoux", "given": "Philippe" } }, { "id": "Kolb-Johann", "name": { "family": "Kolb", "given": "Johann" } }, { "id": "Pantin-\u00c9ric-J", "name": { "family": "Pantin", "given": "\u00c9ric" }, "orcid": "0000-0001-6472-2844" }, { "id": "Riggs-A-J-Eldorado", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Siebenmorgen-Ralf", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Design, pointing control, and on-sky performance of the mid-infrared vortex coronagraph for the VLT/NEAR experiment", "ispublished": "pub", "full_text_status": "public", "keywords": "adaptive optics; infrared imaging; data processing; simulations", "note": "\u00a9 2020 The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. \n\nPaper 20036 received Apr. 15, 2020; accepted for publication Sep. 1, 2020; published online Sep. 16, 2020. \n\nThe authors thank the ESO Paranal Staff for support in conducting the observations. A.L.M. acknowledges the financial support of the F.R.S.-FNRS through a postdoctoral researcher grant. O.A. acknowledges the financial support of the F.R.S.-FNRS through a research associate mandate. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 819155) and under the European Union's seventh framework program (Grant Agreement No. 337569). The research was supported by the Wallonia-Brussels Federation (grant for Concerted Research Actions). The authors have no relevant financial interests and no other potential conflicts of interest to disclose. This work was based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 60.A-9106 and 2102.C-5011.\n\nPublished - 035003_1.pdf
Accepted Version - 2012.08190.pdf
", "abstract": "Vortex coronagraphs have been shown to be a promising avenue for high-contrast imaging in the close-in environment of stars at thermal infrared (IR) wavelengths. They are included in the baseline design of the mid-infrared extremely large telescope imager and spectrograph. To ensure good performance of these coronagraphs, a precise control of the centering of the star image in real time is needed. We previously developed and validated the quadrant analysis of coronagraphic images for tip-tilt sensing estimator (QACITS) pointing estimator to address this issue. While this approach is not wavelength-dependent in theory, it was never implemented for mid-IR observations, which leads to specific challenges and limitations. Here, we present the design of the mid-IR vortex coronagraph for the \"new Earths in the \u03b1 Cen Region (NEAR) experiment with the Very Large Telescope (VLT)/Very Large Telescope imager and spectrometer for the mid-infrared (VISIR) instrument and assess the performance of the QACITS estimator for the centering control of the star image onto the vortex coronagraph. We use simulated data and on-sky data obtained with VLT/VISIR, which was recently upgraded for observations assisted by adaptive optics in the context of the NEAR experiment. We demonstrate that the QACITS-based correction loop is able to control the centering of the star image onto the NEAR vortex coronagraph with a stability down to 0.015\u2009\u03bb\u2009\u2009/\u2009\u2009D rms over 4 h in good conditions. These results show that QACITS is a robust approach for precisely controlling in real time the centering of vortex coronagraphs for mid-IR observations.", "date": "2020-09-16", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "6", "number": "3", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 035003", "id_number": "CaltechAUTHORS:20210202-104752114", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210202-104752114", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Wallonia-Brussels Federation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.jatis.6.3.035003", "primary_object": { "basename": "035003_1.pdf", "url": "https://authors.library.caltech.edu/records/v36st-xdt23/files/035003_1.pdf" }, "related_objects": [ { "basename": "2012.08190.pdf", "url": "https://authors.library.caltech.edu/records/v36st-xdt23/files/2012.08190.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Maire, Anne-Lise; Huby, Elsa; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/x20af-btp53", "eprint_id": 104980, "eprint_status": "archive", "datestamp": "2023-08-19 21:57:52", "lastmod": "2023-10-20 21:01:25", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Plavchan-P", "name": { "family": "Plavchan", "given": "Peter" }, "orcid": "0000-0002-8864-1667" }, { "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Chas" }, "orcid": "0000-0002-5627-5471" }, { "name": { "family": "Cegla", "given": "Heather" } }, { "name": { "family": "Dumusque", "given": "Xavier" }, "orcid": "0000-0002-9332-2011" }, { "name": { "family": "Wang", "given": "Sharon" }, "orcid": "0000-0002-6937-9034" }, { "name": { "family": "Gao", "given": "Peter" }, "orcid": "0000-0002-8518-9601" }, { "name": { "family": "Dressing", "given": "Courtney" }, "orcid": "0000-0001-8189-0233" }, { "name": { "family": "Bastien", "given": "Fabienne" }, "orcid": "0000-0002-7243-1921" }, { "name": { "family": "Basu", "given": "Sarbani" }, "orcid": "0000-0002-6163-3472" }, { "name": { "family": "Beatty", "given": "Thomas" }, "orcid": "0000-0002-9539-4203" }, { "name": { "family": "Bechter", "given": "Andrew" } }, { "name": { "family": "Bechter", "given": "Eric" }, "orcid": "0000-0001-8725-8730" }, { "name": { "family": "Blake", "given": "Cullen" }, "orcid": "0000-0002-6096-1749" }, { "name": { "family": "Bourrier", "given": "Vincent" }, "orcid": "0000-0002-9148-034X" }, { "name": { "family": "Cale", "given": "Bryson" }, "orcid": "0000-0001-6279-0595" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David" }, "orcid": "0000-0002-5741-3047" }, { "name": { "family": "Crass", "given": "Jonathan" } }, { "name": { "family": "Crepp", "given": "Justin" }, "orcid": "0000-0003-0800-0593" }, { "id": "de-Kleer-K-R", "name": { "family": "de Kleer", "given": "Katherine" }, "orcid": "0000-0002-9068-3428" }, { "name": { "family": "Diddams", "given": "Scott" }, "orcid": "0000-0002-2144-0764" }, { "name": { "family": "Eastman", "given": "Jason" }, "orcid": "0000-0003-3773-5142" }, { "name": { "family": "Fischer", "given": "Debra" }, "orcid": "0000-0003-2221-0861" }, { "name": { "family": "Gagn\u00e9", "given": "Jonathan" }, "orcid": "0000-0002-2592-9612" }, { "name": { "family": "Gaudi", "given": "Scott" } }, { "name": { "family": "Grier", "given": "Catherine" }, "orcid": "0000-0001-9920-6057" }, { "name": { "family": "Hall", "given": "Richard" } }, { "name": { "family": "Halverson", "given": "Sam" }, "orcid": "0000-0003-1312-9391" }, { "name": { "family": "Hamze", "given": "Bahaa" } }, { "name": { "family": "Herrero Casas", "given": "Enrique" } }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew" }, "orcid": "0000-0001-8638-0320" }, { "name": { "family": "Kempton", "given": "Eliza" }, "orcid": "0000-0002-1337-9051" }, { "name": { "family": "Latouf", "given": "Natasha" } }, { "name": { "family": "Leifer", "given": "Stephanie" }, "orcid": "0000-0002-8980-7825" }, { "name": { "family": "Lightsey", "given": "Paul" } }, { "name": { "family": "Lisse", "given": "Casey" } }, { "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "name": { "family": "Matzko", "given": "William" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Mayo", "given": "Andrew" }, "orcid": "0000-0002-7216-2135" }, { "name": { "family": "Newman", "given": "Patrick" } }, { "name": { "family": "Papp", "given": "Scott" }, "orcid": "0000-0001-8290-7076" }, { "name": { "family": "Pope", "given": "Benjamin" } }, { "name": { "family": "Purcell", "given": "Bill" } }, { "name": { "family": "Quinn", "given": "Sam" }, "orcid": "0000-0002-8964-8377" }, { "name": { "family": "Ribas", "given": "Ignasi" } }, { "name": { "family": "Rosich", "given": "Albert" } }, { "name": { "family": "Sanchez-Maes", "given": "Sophia" } }, { "name": { "family": "Tanner", "given": "Angelle" }, "orcid": "0000-0002-0786-7307" }, { "name": { "family": "Thompson", "given": "Samantha" } }, { "id": "Vahala-K-J", "name": { "family": "Vahala", "given": "Kerry" }, "orcid": "0000-0003-1783-1380" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "name": { "family": "Williams", "given": "Peter" } }, { "name": { "family": "Wise", "given": "Alex" } }, { "name": { "family": "Wright", "given": "Jason" }, "orcid": "0000-0001-6160-5888" } ] }, "title": "EarthFinder Probe Mission Concept Study: Characterizing nearby stellar exoplanet systems with Earth-mass analogs for future direct imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019. \n\nNASA Probe Mission concept white paper for 2020 Astrophysics National Academies Decadal Survey. \n\nThis research was carried out at George Mason University and the Jet Propulsion\nLaboratory, California Institute of Technology, under a contract with the National\nAeronautics and Space Administration.\nReference herein to any specific commercial product, process, or service by trade\nname, trademark, manufacturer, or otherwise, does not constitute or imply its\nendorsement by the United States Government or the Jet Propulsion Laboratory,\nCalifornia Institute of Technology.\n\nSubmitted - 2006.13428.pdf
", "abstract": "EarthFinder is a NASA Astrophysics Probe mission concept selected for study as input to the 2020 Astrophysics National Academies Decadal Survey. The EarthFinder concept is based on a dramatic shift in our understanding of how PRV measurements should be made. We propose a new paradigm which brings the high precision, high cadence domain of transit photometry as demonstrated by Kepler and TESS to the challenges of PRV measurements at the cm/s level. This new paradigm takes advantage of: 1) broad wavelength coverage from the UV to NIR which is only possible from space to minimize the effects of stellar activity; 2) extremely compact, highly stable, highly efficient spectrometers (R>150,000) which require the diffraction-limited imaging possible only from space over a broad wavelength range; 3) the revolution in laser-based wavelength standards to ensure cm/s precision over many years; 4) a high cadence observing program which minimizes sampling-induced period aliases; 5) exploiting the absolute flux stability from space for continuum normalization for unprecedented line-by-line analysis not possible from the ground; and 6) focusing on the bright stars which will be the targets of future imaging missions so that EarthFinder can use a ~1.5 m telescope.", "date": "2020-08-17", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20200817-122112681", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200817-122112681", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "George Mason University" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.48550/arXiv.2006.13428", "primary_object": { "basename": "2006.13428.pdf", "url": "https://authors.library.caltech.edu/records/x20af-btp53/files/2006.13428.pdf" }, "resource_type": "monograph", "pub_year": "2020", "author_list": "Plavchan, Peter; Vasisht, Gautam; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/znsq7-t1y93", "eprint_id": 104982, "eprint_status": "archive", "datestamp": "2023-08-19 22:56:19", "lastmod": "2023-10-20 21:01:31", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "name": { "family": "Juanola-Parramon", "given": "R." } }, { "name": { "family": "Nemati", "given": "B." } }, { "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Bailey", "given": "V. P." }, "orcid": "0000-0002-5407-2806" }, { "id": "Bolcar-M", "name": { "family": "Bolcar", "given": "M." } }, { "id": "Mart\u00edn-S", "name": { "family": "Mart\u00edn", "given": "S." }, "orcid": "0000-0001-9281-2919" }, { "name": { "family": "Zimmerman", "given": "N." }, "orcid": "0000-0001-5484-1516" }, { "name": { "family": "Stark", "given": "C." } }, { "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "name": { "family": "Benford", "given": "D." }, "orcid": "0000-0002-9884-4206" }, { "name": { "family": "Cady", "given": "E." }, "orcid": "0000-0002-8789-2931" }, { "name": { "family": "Crill", "given": "B." }, "orcid": "0000-0002-4650-8518" }, { "name": { "family": "Douglas", "given": "E." } }, { "name": { "family": "Gaudi", "given": "B. S." }, "orcid": "0000-0003-0395-9869" }, { "name": { "family": "Kasdin", "given": "J." } }, { "name": { "family": "Kern", "given": "B." } }, { "name": { "family": "Krist", "given": "J." } }, { "name": { "family": "Kruk", "given": "J." } }, { "name": { "family": "Luchik", "given": "T." } }, { "name": { "family": "Macintosh", "given": "B." }, "orcid": "0000-0003-1212-7538" }, { "name": { "family": "Mandell", "given": "A." }, "orcid": "0000-0002-8119-3355" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Poberezhskiy", "given": "I." } }, { "name": { "family": "Rhodes", "given": "J." }, "orcid": "0000-0002-4485-8549" }, { "name": { "family": "Riggs", "given": "A. J." }, "orcid": "0000-0002-0863-6228" }, { "name": { "family": "Turnbull", "given": "M." } }, { "name": { "family": "Roberge", "given": "A." }, "orcid": "0000-0002-2989-3725" }, { "name": { "family": "Shi", "given": "F." } }, { "name": { "family": "Siegler", "given": "N." } }, { "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "M." }, "orcid": "0000-0001-7591-2731" }, { "name": { "family": "Zellem", "given": "R." } }, { "name": { "family": "Zhao", "given": "F." } } ] }, "title": "Paving the Way to Future Missions: the Roman Space Telescope Coronagraph Technology Demonstration", "ispublished": "unpub", "full_text_status": "public", "note": "Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. \u00a9 2020 California Institute of Technology. Government sponsorship acknowledged.\n\nSubmitted - 2008.05624.pdf
", "abstract": "This document summarizes how far the Nancy Grace Roman Space Telescope Coronagraph Instrument (Roman CGI) will go toward demonstrating high-contrast imaging and spectroscopic requirements for potential future exoplanet direct imaging missions, illustrated by the HabEx and LUVOIR concepts. The assessment is made for two levels of assumed CGI performance: (i) current best estimate (CBE) as of August 2020, based on laboratory results and realistic end-to-end simulations with JPL-standard Model Uncertainty Factors (MUFs); (ii) CGI design specifications inherited from Phase B requirements. We find that the predicted performance (CBE) of many CGI subsystems compares favorably with the needs of future missions, despite providing more modest point source detection limits than future missions. This is essentially due to the challenging pupil of the Roman Space Telescope; this pupil pushes the coronagraph masks sensitivities to misalignments to be commensurate with future missions. In particular, CGI will demonstrate active low-order wavefront control and photon counting capabilities at levels of performance either higher than, or comparable to, the needs of future missions.", "date": "2020-08-17", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20200817-125215162", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200817-125215162", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.2008.05624", "primary_object": { "basename": "2008.05624.pdf", "url": "https://authors.library.caltech.edu/records/znsq7-t1y93/files/2008.05624.pdf" }, "resource_type": "monograph", "pub_year": "2020", "author_list": "Mennesson, B.; Juanola-Parramon, R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/csebn-j8z15", "eprint_id": 104634, "eprint_status": "archive", "datestamp": "2023-08-22 05:58:37", "lastmod": "2023-10-20 20:41:13", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "van-Holstein-R-G", "name": { "family": "van Holstein", "given": "Rob G." }, "orcid": "0000-0003-1520-8405" }, { "id": "Ruffio-J-B", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Calvin-B-A", "name": { "family": "Calvin", "given": "Benjamin A." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Benisty-M", "name": { "family": "Benisty", "given": "Myriam" }, "orcid": "0000-0002-7695-7605" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Esposito-T-M", "name": { "family": "Esposito", "given": "Thomas M." }, "orcid": "0000-0002-0792-3719" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Stolker-T", "name": { "family": "Stolker", "given": "Tomas" }, "orcid": "0000-0002-5823-3072" }, { "id": "Chiang-Eugene", "name": { "family": "Chiang", "given": "Eugene" }, "orcid": "0000-0002-6246-2310" }, { "id": "De-Boer-J", "name": { "family": "De Boer", "given": "Jozua" }, "orcid": "0000-0002-1028-7522" }, { "id": "Debes-J-H", "name": { "family": "Debes", "given": "John H." }, "orcid": "0000-0002-1783-8817" }, { "id": "Garufi-A", "name": { "family": "Garufi", "given": "Antonio" }, "orcid": "0000-0002-4266-0643" }, { "id": "Grady-C-A", "name": { "family": "Grady", "given": "Carol A." } }, { "id": "Hines-D-C", "name": { "family": "Hines", "given": "Dean C." }, "orcid": "0000-0003-4653-6161" }, { "id": "Maire-A-L", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "M\u00e9nard-F", "name": { "family": "M\u00e9nard", "given": "Fran\u00e7ois" }, "orcid": "0000-0002-1637-7393" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Poteet-C-A", "name": { "family": "Poteet", "given": "Charles A." }, "orcid": "0000-0003-4845-7483" }, { "id": "Schneider-G", "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" } ] }, "title": "Dynamical Evidence of a Spiral Arm\u2013driving Planet in the MWC 758 Protoplanetary Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Protoplanetary disks; Coronagraphic imaging; Planetary system formation; Orbital motion", "note": "\u00a9 2020 The American Astronomical Society. \n\nReceived 2020 May 8; revised 2020 July 8; accepted 2020 July 8; published 2020 July 29. \n\nWe thank the anonymous referee for comments that improved the clarity of this Letter, and Cassandra Hall for useful discussions. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 060.A-9389(A) and 104.C-0472(A). B.R. thanks Christian Ginski for discussions on shadowing effects, R\u00e9mi Soummer for initiating the Archival Legacy Investigations of Circumstellar Environments (ALICE) project that set up the stage for R18 and this Letter. T.E. was supported in part by NASA Grants NNX15AD95G/NEXSS, NNX15AC89G, and NSF AST-1518332. A.L.M. acknowledges the financial support of the F.R.S.-FNRS through a postdoctoral researcher grant. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacilities: Very Large Telescope (SPHERE) - , Keck:II (NIRC2). - \n\nSoftware: diskmap (Stolker et al. 2016), IRDAP (van Holstein et al. 2017, 2020), scipy (Virtanen et al. 2020).\n\nPublished - Ren_2020_ApJL_898_L38.pdf
Accepted Version - 2007.04980.pdf
", "abstract": "More than a dozen young stars host spiral arms in their surrounding protoplanetary disks. The excitation mechanisms of such arms are under debate. The two leading hypotheses\u2014companion\u2013disk interaction and gravitational instability (GI)\u2014predict distinct motion for spirals. By imaging the MWC 758 spiral arm system at two epochs spanning ~5 yr using the SPHERE instrument on the Very Large Telescope, we test the two hypotheses for the first time. We find that the pattern speeds of the spirals are not consistent with the GI origin. Our measurements further evince the existence of a faint \"missing planet\" driving the disk arms. The average spiral pattern speed is 0.\u00b022 \u00b1 0.\u00b003 yr\u207b\u00b9, pointing to a driver at 172\u207a\u00b9\u2078\u208b\u2081\u2084 au around a 1.9 M_\u2609 central star if it is on a circular orbit. In addition, we witness time-varying shadowing effects on a global scale that are likely originating from an inner disk.", "date": "2020-08-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "898", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. L38", "id_number": "CaltechAUTHORS:20200729-095324179", "issn": "2041-8213", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200729-095324179", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX15AD95G" }, { "agency": "NASA", "grant_number": "NNX15AC89G" }, { "agency": "NSF", "grant_number": "AST-1518332" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/2041-8213/aba43e", "primary_object": { "basename": "2007.04980.pdf", "url": "https://authors.library.caltech.edu/records/csebn-j8z15/files/2007.04980.pdf" }, "related_objects": [ { "basename": "Ren_2020_ApJL_898_L38.pdf", "url": "https://authors.library.caltech.edu/records/csebn-j8z15/files/Ren_2020_ApJL_898_L38.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Ren, Bin; Dong, Ruobing; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nqkrh-0jg54", "eprint_id": 107089, "eprint_status": "archive", "datestamp": "2023-08-19 22:45:55", "lastmod": "2023-10-23 15:30:51", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Johnston-Benjamin-J", "name": { "family": "Johnston", "given": "Benjamin F." } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Gross-Simon", "name": { "family": "Gross", "given": "Simon" }, "orcid": "0000-0001-5130-183X" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Martin-Stefan-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Withford-Michael-J", "name": { "family": "Withford", "given": "Michael J." } } ] }, "title": "Ultrafast laser inscription of volume phase optics: Towards a scalar vortex mask for broadband coronagraphy", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2020 The Author(s). \n\nThis work was performed in part at the OptoFab node of the Australian National Fabrication Facility, utilizing NCRIS and NSW State Gov. Support.", "abstract": "We report on an investigation using ultrafast laser inscription in borosilicate glasses to create in-volume phase optics. An application of an optic fashioned in this way is discussed in the context of broadband \"scalar vortex coronagraphy\" for astronomical imaging.", "date": "2020-08", "date_type": "published", "publisher": "Optical Society of America", "place_of_pub": "Washington, DC", "pagerange": "Art. No. P1_11", "id_number": "CaltechAUTHORS:20201215-141036300", "isbn": "9780646825045", "book_title": "2020 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201215-141036300", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Department of Education (Australia)" }, { "agency": "New South Wales" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1364/cleopr.2020.p1_11", "resource_type": "book_section", "pub_year": "2020", "author_list": "Johnston, Benjamin F.; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/y3wvx-1zx75", "eprint_id": 105919, "eprint_status": "archive", "datestamp": "2023-08-22 05:32:53", "lastmod": "2023-10-20 22:51:11", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Wetherell-E", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "Shane" } }, { "id": "Lockhart-Charles", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Warmbier-E-A", "name": { "family": "Warmbier", "given": "Eric" } }, { "id": "Ragland-S-D", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Alvarez-Carlos", "name": { "family": "Alvarez", "given": "Carlos" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Goebel-S-B", "name": { "family": "Goebel", "given": "Sean" }, "orcid": "0000-0003-3763-2418" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "Donald N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Taheri-Mojtaba", "name": { "family": "Taheri", "given": "Mojtaba" } }, { "id": "Plantet-C", "name": { "family": "Plantet", "given": "Cedric" } }, { "id": "Chambouleyron-V", "name": { "family": "Chambouleyron", "given": "Vincent" } } ] }, "title": "Adaptive optics with an infrared pyramid wavefront sensor at Keck", "ispublished": "pub", "full_text_status": "public", "keywords": "adaptive optics; astronomy; wavefront sensing; infrared", "note": "\u00a9 2020 The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. \n\nReceived: 23 March 2020; Accepted: 27 August 2020; Published: 24 September 2020. \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The FIU is supported by the Heising-Simons Foundation. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 039003_1.pdf
", "abstract": "The study of cold or obscured, red astrophysical sources can significantly benefit from adaptive optics (AO) systems employing infrared (IR) wavefront sensors. One particular area is the study of exoplanets around M-dwarf stars and planet formation within protoplanetary disks in star-forming regions. Such objects are faint at visible wavelengths but bright enough in the IR to be used as a natural guide star for the AO system. Doing the wavefront sensing at IR wavelengths enables high-resolution AO correction for such science cases, with the potential to reach the contrasts required for direct imaging of exoplanets. To this end, a new near-infrared pyramid wavefront sensor (PyWFS) has been added to the Keck II AO system, extending the performance of the facility AO system for the study of faint red objects. We present the Keck II PyWFS, which represents a number of firsts, including the first PyWFS installed on a segmented telescope and the first use of an IR PyWFS on a 10-m class telescope. We discuss the scientific and technological advantages offered by IR wavefront sensing and present the design and commissioning of the Keck PyWFS. In particular, we report on the performance of the Selex Avalanche Photodiode for HgCdTe InfraRed Array detector used for the PyWFS and highlight the novelty of this wavefront sensor in terms of the performance for faint red objects and the improvement in contrast. The system has been commissioned for science with the vortex coronagraph in the NIRC2 IR science instrument and is being commissioned alongside a new fiber injection unit for NIRSPEC. We present the first science verification of the system\u2014to facilitate the study of exoplanets around M-type stars.", "date": "2020-07", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "6", "number": "3", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 039003", "id_number": "CaltechAUTHORS:20201008-100949118", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201008-100949118", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.JATIS.6.3.039003", "primary_object": { "basename": "039003_1.pdf", "url": "https://authors.library.caltech.edu/records/y3wvx-1zx75/files/039003_1.pdf" }, "resource_type": "article", "pub_year": "2020", "author_list": "Bond, Charlotte Z.; Cetre, Sylvain; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nnp1k-41951", "eprint_id": 102960, "eprint_status": "archive", "datestamp": "2023-08-22 05:11:53", "lastmod": "2024-02-02 21:08:08", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Harada-Caleb-K", "name": { "family": "Harada", "given": "Caleb K." }, "orcid": "0000-0001-5737-1687" }, { "id": "Oklop\u010di\u0107-A", "name": { "family": "Oklop\u010di\u0107", "given": "Antonija" }, "orcid": "0000-0002-9584-6476" }, { "id": "Eriksen-James", "name": { "family": "Eriksen", "given": "James" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Constraints on Metastable Helium in the Atmospheres of WASP-69b and WASP-52b with Ultranarrowband Photometry", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet astronomy; Exoplanet atmospheres; Planetary atmospheres; Transmission spectroscopy; Infrared photometry; Narrow band photometry", "note": "\u00a9 2020 The American Astronomical Society. \n\nReceived 2020 February 4; revised 2020 April 24; accepted 2020 April 27; published 2020 May 28. \n\nWe thank the referee for a very thorough review that improved the quality of this work. We are grateful for the support of the Heising-Simons Foundation, which allowed us to purchase the narrowband filter used in this study. We thank Lisa Nortmann for providing us with the CARMENES data for WASP-69b. We recognize the Palomar Observatory staff for their support of our work, especially Paul Nied and Kajse Peffer for telescope operation and James Brugger, Greg Van Idsinga, Ernie Velador, and Brian Faull for assistance with helium lamp hardware. We also thank James Owen, Yanqin Wu, Trevor David, Ignas Snellen, Yayaati Chachan, Fei Dai, Munazza Alam, Nikolay Nikolov, Chaz Shapiro, Jennifer Milburn, Andy Boden, Roger Smith, and Keith Matthews for very useful conversations. S.V. is supported by an NSF Graduate Research Fellowship and the Paul & Daisy Soros Fellowship for New Americans. H.A.K. acknowledges support from NSF CAREER grant 1555095 and NASA Origins grant NNX14AD22G. C.K.H. acknowledges support from the University of Maryland Department of Astronomy Honors Program, and from the Smithsonian Astrophysical Observatory REU program, which is funded in part by the National Science Foundation REU and Department of Defense ASSURE programs under NSF Grant no. AST-1852268, and by the Smithsonian Institution. A.O. acknowledges support by NASA through the NASA Hubble Fellowship grant HST-HF2-51443.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. \n\nFacilities: Hale (WIRC) - , ADS - , Exoplanet Archive. - \n\nSoftware: photutils (Bradley et al. 2016), numpy (van der Walt et al. 2011), astropy (Astropy Collaboration et al. 2013, 2018), scipy (Virtanen et al. 2019), matplotlib (Hunter 2007), batman (Kreidberg 2015), emcee (Foreman-Mackey et al. 2013), corner (Foreman-Mackey 2016), ldtk (Husser et al. 2013; Parviainen & Aigrain 2015), Aladin Lite (Bonnarel et al. 2000; Boch & Fernique 2014).\n\nPublished - Vissapragada_2020_AJ_159_278.pdf
Accepted Version - 2004.13728.pdf
", "abstract": "Infrared observations of metastable 2\u00b3S helium absorption with ground- and space-based spectroscopy are rapidly maturing, as this species is a unique probe of exoplanet atmospheres. Specifically, the transit depth in the triplet feature (with vacuum wavelengths near 1083.3 nm) can be used to constrain the temperature and mass-loss rate of an exoplanet's upper atmosphere. Here, we present a new photometric technique to measure metastable 23S helium absorption using an ultranarrowband filter (FWHM 0.635 nm) coupled to a beam-shaping diffuser installed in the Wide-field Infrared Camera on the 200 inch Hale Telescope at Palomar Observatory. We use telluric OH lines and a helium arc lamp to characterize refractive effects through the filter and to confirm our understanding of the filter transmission profile. We benchmark our new technique by observing a transit of WASP-69b and detect an excess absorption of 0.498% \u00b1 0.045% (11.1\u03c3), consistent with previous measurements after considering our bandpass. We then use this method to study the inflated gas giant WASP-52b and place a 95th percentile upper limit on excess absorption in our helium bandpass of 0.47%. Using an atmospheric escape model, we constrain the mass-loss rate for WASP-69b to be 5.25^(+0.65)_(\u22120.46) \u00d7 10\u207b\u2074 M_J/Gyr\u207b\u00b9 (3.32^(+0.67)_(\u22120.56) \u00d7 10\u207b\u00b3 M_J/Gyr\u207b\u00b9) at 7000 K (12,000 K). Additionally, we set an upper limit on the mass-loss rate of WASP-52b at these temperatures of 2.1 \u00d7 10\u207b\u2074 M_J/Gyr\u207b\u00b9 (2.1\u00d710\u207b\u00b3 M_J/Gyr\u207b\u00b9) . These results show that ultranarrowband photometry can reliably quantify absorption in the metastable helium feature.", "date": "2020-06", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 278", "id_number": "CaltechAUTHORS:20200501-110428030", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200501-110428030", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Graduate Research Fellowship" }, { "agency": "Paul and Daisy Soros Fellowship" }, { "agency": "NSF", "grant_number": "AST-1555095" }, { "agency": "NASA", "grant_number": "NNX14AD22G" }, { "agency": "University of Maryland" }, { "agency": "Smithsonian Astrophysical Observatory" }, { "agency": "NSF", "grant_number": "AST-1852268" }, { "agency": "Smithsonian Institution" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51443.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ab8e34", "primary_object": { "basename": "2004.13728.pdf", "url": "https://authors.library.caltech.edu/records/nnp1k-41951/files/2004.13728.pdf" }, "related_objects": [ { "basename": "Vissapragada_2020_AJ_159_278.pdf", "url": "https://authors.library.caltech.edu/records/nnp1k-41951/files/Vissapragada_2020_AJ_159_278.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Vissapragada, Shreyas; Knutson, Heather A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/p32nw-tds18", "eprint_id": 102965, "eprint_status": "archive", "datestamp": "2023-08-22 05:12:18", "lastmod": "2023-10-20 00:40:00", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "name": { "family": "Ginzburg", "given": "Sivan" } }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "Bin" }, "orcid": "0000-0003-1698-9696" }, { "id": "Wallack-N-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Gao", "given": "Peter" }, "orcid": "0000-0002-8518-9601" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Bond", "given": "Charlotte Z." } }, { "name": { "family": "Cetre", "given": "Sylvain" } }, { "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "name": { "family": "De Rosa", "given": "Robert J." }, "orcid": "0000-0002-4918-0247" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "name": { "family": "Alvarez", "given": "Carlos" } }, { "name": { "family": "Baranec", "given": "Christoph" }, "orcid": "0000-0002-1917-9157" }, { "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "name": { "family": "Chun", "given": "Mark" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "name": { "family": "Duch\u00eane", "given": "Gaspard" } }, { "name": { "family": "Ghez", "given": "Andrea M." }, "orcid": "0000-0003-3230-5055" }, { "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "name": { "family": "Hall", "given": "Donald N. B." } }, { "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "name": { "family": "Lilley", "given": "Scott" } }, { "name": { "family": "M\u00e9nard", "given": "Fran\u00e7ois" }, "orcid": "0000-0002-1637-7393" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "name": { "family": "Pinte", "given": "Christophe" }, "orcid": "0000-0001-5907-5179" }, { "name": { "family": "Ragland", "given": "Sam" } }, { "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "name": { "family": "Wetherell", "given": "Ed" } }, { "name": { "family": "Williams", "given": "Jonathan P." }, "orcid": "0000-0001-5058-695X" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "name": { "family": "Zuckerman", "given": "Ben" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Keck/NIRC2 L'-Band Imaging of Jovian-Mass Accreting Protoplanets around PDS 70", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet formation; Exoplanet atmospheres; Orbit determination; Exoplanet dynamics; Coronagraphic imaging", "note": "\u00a9 2020 The American Astronomical Society.\n\nReceived 2020 March 13; revised 2020 April 10; accepted 2020 April 17; published 2020 May 18.\n\nWe thank Trevor David for helpful discussion and the referees for their helpful suggestions for the paper. J.J.W., S.G., and P.G. are supported by the Heising-Simons Foundation 51 Pegasi b postdoctoral fellowship. The Keck infrared pyramid wave front sensor was developed with support from the National Science Foundation under grant Nos. AST-1611623 and AST-1106391, as well as the Heising Simons Foundation under the Keck Planet Imager and Characterizer project. This research is partially supported by NASA ROSES XRP, award 80NSSC19K0294. F.M. acknowledges funding from ANR of France under contract ANR-16-CE31-0013. Part of the computations presented here were conducted on the Caltech High Performance Cluster, partially supported by a grant from the Gordon and Betty Moore Foundation. This project has received funding from the European Research Council (ERC) under the European Union's Seventh Framework Program (grant agreement 337569, VORTEX) and under the European Union's Horizon 2020 research and innovation programme (grant agreement 819155, EPIC). The research was supported by the Wallonia-Brussels Federation (grant for Concerted Research Actions). Data presented in this work were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nFacility: Keck II (NIRC2). -\n\nSoftware: pyKLIP (Wang et al. 2015), orbitize! (Blunt et al. 2020), DebrisDiskFM (Ren et al. 2019), emcee (Foreman-Mackey et al. 2013), ptemcee (Vousden et al. 2016), MCFOST (Pinte et al. 2006, 2009).\n\nPublished - Wang_2020_AJ_159_263.pdf
Submitted - 2004.09597.pdf
", "abstract": "We present L'-band imaging of the PDS 70 planetary system with Keck/NIRC2 using the new infrared pyramid wave front sensor. We detected both PDS 70 b and c in our images, as well as the front rim of the circumstellar disk. After subtracting off a model of the disk, we measured the astrometry and photometry of both planets. Placing priors based on the dynamics of the system, we estimated PDS 70 b to have a semimajor axis of 20\u207a\u00b3\u208b\u2084 au and PDS 70 c to have a semimajor axis of 34\u207a\u00b9\u00b2\u208b\u2086 au (95% credible interval). We fit the spectral energy distribution (SED) of both planets. For PDS 70 b, we were able to place better constraints on the red half of its SED than previous studies and inferred the radius of the photosphere to be 2\u20133 R_(Jup). The SED of PDS 70 c is less well constrained, with a range of total luminosities spanning an order of magnitude. With our inferred radii and luminosities, we used evolutionary models of accreting protoplanets to derive a mass of PDS 70 b between 2 and 4 M_(Jup) and a mean mass accretion rate between 3 \u00d7 10\u207b\u2077 and 8 \u00d7 10\u207b\u2077 M_(Jup)/yr. For PDS 70 c, we computed a mass between 1 and 3 M_(Jup) and mean mass accretion rate between 1 \u00d7 10\u207b\u2077 and 5 \u00d7 10\u207b\u2077 M_(Jup) /yr. The mass accretion rates imply dust accretion timescales short enough to hide strong molecular absorption features in both planets' SEDs.", "date": "2020-06", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 263", "id_number": "CaltechAUTHORS:20200501-110445577", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200501-110445577", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR-16-CE31-0013" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "Wallonia-Brussels Federation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.3847/1538-3881/ab8aef", "primary_object": { "basename": "2004.09597.pdf", "url": "https://authors.library.caltech.edu/records/p32nw-tds18/files/2004.09597.pdf" }, "related_objects": [ { "basename": "Wang_2020_AJ_159_263.pdf", "url": "https://authors.library.caltech.edu/records/p32nw-tds18/files/Wang_2020_AJ_159_263.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Wang, Jason J.; Ginzburg, Sivan; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/fnxdp-amx89", "eprint_id": 102957, "eprint_status": "archive", "datestamp": "2023-08-22 04:58:33", "lastmod": "2023-10-20 00:39:43", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Karalidi-T", "name": { "family": "Karalidi", "given": "Theodora" }, "orcid": "0000-0001-7356-6652" }, { "id": "Marley-M-S", "name": { "family": "Marley", "given": "Mark S." }, "orcid": "0000-0002-5251-2943" }, { "id": "van-Holstein-R-G", "name": { "family": "van Holstein", "given": "Rob G." } }, { "id": "Sengupta-Sujan", "name": { "family": "Sengupta", "given": "Sujan" }, "orcid": "0000-0002-6176-3816" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Kataria-T", "name": { "family": "Kataria", "given": "Tiffany" }, "orcid": "0000-0003-3759-9080" }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "de-Boer-J", "name": { "family": "de Boer", "given": "Jos" }, "orcid": "0000-0002-1028-7522" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" } ] }, "title": "Detection of Polarization due to Cloud Bands in the Nearby Luhman 16 Brown Dwarf Binary", "ispublished": "pub", "full_text_status": "public", "keywords": "Near infrared astronomy; Very Large Telescope; Polarimetry", "note": "\u00a9 2020 The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2019 May 21; revised 2020 January 8; accepted 2020 January 13; published 2020 May 5. \n\nWe thank D. Saumon for updated brown dwarf evolutionary models. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51378.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. The research of F.S. and J.d.B. leading to these results has received funding from the European Research Council under ERC Starting Grant agreement 678194 (FALCONER). Based on observations collected at the European Southern Observatory under ESO programmes 0101.C-0561(A) and 0101.C-0561(B). (Part of) The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work is supported by the National Science Foundation under grant No. AAG-1816341. \n\nFacility: VLT(NaCo). - \n\nSoftware: astropy (Astropy Collaboration et al. 2013), photutils (Bradley et al. 2017), emcee (Foreman-Mackey et al. 2013), NumPy, SciPy, Matplotlib.\n\nPublished - Millar-Blanchaer_2020_ApJ_894_42.pdf
", "abstract": "Brown dwarfs exhibit patchy or spatially varying banded cloud structures that are inferred through photometric and spectroscopic variability modeling techniques. However, these methods are insensitive to rotationally invariant structures, such as the bands seen in Jupiter. Here, we present H-band Very Large Telescope/NaCo linear polarization measurements of the nearby Luhman 16 L/T transition binary, which suggest that Luhman 16A exhibits constant longitudinal cloud bands. The instrument was operated in pupil tracking mode, allowing us to unambiguously distinguish between a small astrophysical polarization and the ~2% instrumental linear polarization. We measure the degree and angle of linear polarization of Luhman 16A and B to be p_A = 0.031% \u00b1 0.004% and \u03c8_A = \u221232\u00b0 \u00b1 4\u00b0, and p_B = 0.010% \u00b1 0.004% and \u03c8/B = 73\u207a\u00b9\u00b3\u208b\u2081\u2081\u00b0, respectively. Using known physical parameters of the system, we demonstrate that an oblate homogeneous atmosphere cannot account for the polarization measured in Luhman 16A, but could be responsible for that of the B component. Through a nonexhaustive search of banded cloud morphologies, we demonstrate a two-banded scenario that can achieve a degree of linear polarization of p = 0.03% and conclude that the measured polarization of the A component must be predominantly due to cloud banding. For Luhman 16B, either oblateness or cloud banding could be the dominant source of the measured polarization. The misaligned polarization angles of the two binary components tentatively suggest spin\u2013orbit misalignment. These measurements provide new evidence for the prevalence of cloud banding in brown dwarfs while at the same time demonstrating a new method\u2014complementary to photometric and spectroscopic variability methods\u2014for characterizing the cloud morphologies of substellar objects without signs of variability.", "date": "2020-05-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "894", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 42", "id_number": "CaltechAUTHORS:20200501-084127580", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200501-084127580", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51378.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "European Research Council (ERC)", "grant_number": "678194" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NSF", "grant_number": "AAG-1816341" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ab6ef2", "primary_object": { "basename": "Millar-Blanchaer_2020_ApJ_894_42.pdf", "url": "https://authors.library.caltech.edu/records/fnxdp-amx89/files/Millar-Blanchaer_2020_ApJ_894_42.pdf" }, "resource_type": "article", "pub_year": "2020", "author_list": "Millar-Blanchaer, Maxwell A.; Girard, Julien H.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/taps6-g6e60", "eprint_id": 102966, "eprint_status": "archive", "datestamp": "2023-08-19 20:03:49", "lastmod": "2023-10-20 00:40:02", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Turyshev-S-G", "name": { "family": "Turyshev", "given": "Slava G." } }, { "id": "Shao-Michael", "name": { "family": "Shao", "given": "Michael" } }, { "id": "Toth-V-T", "name": { "family": "Toth", "given": "Viktor T." } }, { "id": "Friedman-L-D", "name": { "family": "Friedman", "given": "Louis D." } }, { "id": "Alkalai-L", "name": { "family": "Alkalai", "given": "Leon" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Shen-Janice", "name": { "family": "Shen", "given": "Janice" } }, { "id": "Swain-M-R", "name": { "family": "Swain", "given": "Mark R." }, "orcid": "0000-0002-0919-4468" }, { "id": "Zhou-Hanying", "name": { "family": "Zhou", "given": "Hanying" } }, { "id": "Helvajian-H", "name": { "family": "Helvajian", "given": "Henry" } }, { "id": "Heinsheimer-T", "name": { "family": "Heinsheimer", "given": "Tom" } }, { "id": "Janson-Siegfried", "name": { "family": "Janson", "given": "Siegfried" } }, { "id": "Leszczynski-Z", "name": { "family": "Leszczynski", "given": "Zigmond" } }, { "id": "McVey-John", "name": { "family": "McVey", "given": "John" } }, { "id": "Garber-D", "name": { "family": "Garber", "given": "Darren" } }, { "id": "Davoyan-A-R", "name": { "family": "Davoyan", "given": "Artur" }, "orcid": "0000-0002-4662-1158" }, { "id": "Redfield-S", "name": { "family": "Redfield", "given": "Seth" }, "orcid": "0000-0003-3786-3486" }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } } ] }, "title": "Direct Multipixel Imaging and Spectroscopy of an Exoplanet with a Solar Gravity Lens Mission", "ispublished": "unpub", "full_text_status": "public", "note": "We would like to express our gratitude to our many colleagues who have either collaborated with us on this report or given us their wisdom. We specifically thank Roy Nakagawa, Nathan Strange, Phil A. Willems, John L. West, Stacy Weinstein-Weiss, who provided us with very valuable comments, encouragement, support and stimulating discussions while this report was in preparation. \n\nWe acknowledge fruitful collaborations with several our NIAC Fellows, especially with Stephanie Thomas, John Brophy, Philip Lubin, Robert Adams and Nickolas Solomey. \n\nSeveral on-going collaborations with our industry partners, non-profit and academia contributed to our work, namely with NXTRAC, Explore, L'Garde, Firefly, Morpheus Space, Zeno Power Systems, Breakthrough StarShot, Space Venture Coalition, Texas A&M University, UCLA, Cornell Tech, MIT, University of Colorado in Colorado Springs, as well as NASA Ames Research Center, NASA Marshall Space Flight Center, and others.\nFinally, we are especially thankful to NASA Innovative Advanced Concepts (NIAC) for their support for our work in the pursuit of an exciting objective \u2013 using the SGL for direct high-resolution imaging and spectroscopy of a potentially habitable exoplanet. \n\nThe work described here was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. \u00a92020. All rights reserved. \n\nDisclaimer: The cost information contained in this document is of a budgetary and planning nature and is intended for informational purposes only. It does not constitute a commitment on the part of JPL and/or Caltech.\n\nAccepted Version - 2002.11871.pdf
", "abstract": "We examined the solar gravitational lens (SGL) as the means to produce direct high-resolution, multipixel images of exoplanets. The properties of the SGL are remarkable: it offers maximum light amplification of ~1e11 and angular resolution of ~1e-10 arcsec. A probe with a 1-m telescope in the SGL focal region can image an exoplanet at 30 pc with 10-kilometer resolution on its surface, sufficient to observe seasonal changes, oceans, continents, surface topography. We reached and exceeded all objectives set for our study: We developed a new wave-optical approach to study the imaging of exoplanets while treating them as extended, resolved, faint sources at large but finite distances. We properly accounted for the solar corona brightness. We developed deconvolution algorithms and demonstrated the feasibility of high-quality image reconstruction under realistic conditions. We have proven that multipixel imaging and spectroscopy of exoplanets with the SGL are feasible. We have developed a new mission concept that delivers an array of optical telescopes to the SGL focal region relying on three innovations: i) a new way to enable direct exoplanet imaging, ii) use of smallsats solar sails fast transit through the solar system and beyond, iii) an open architecture to take advantage of swarm technology. This approach enables entirely new missions, providing a great leap in capabilities for NASA and the greater aerospace community. Our results are encouraging as they lead to a realistic design for a mission that will be able to make direct resolved images of exoplanets in our stellar neighborhood. It could allow exploration of exoplanets relying on the SGL capabilities decades, if not centuries, earlier than possible with other extant technologies. The architecture and mission concepts for a mission to the strong interference region of the SGL are promising and should be explored further.", "date": "2020-05-01", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20200501-110449071", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200501-110449071", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.2002.11871", "primary_object": { "basename": "2002.11871.pdf", "url": "https://authors.library.caltech.edu/records/taps6-g6e60/files/2002.11871.pdf" }, "resource_type": "monograph", "pub_year": "2020", "author_list": "Turyshev, Slava G.; Shao, Michael; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rrqcr-hf679", "eprint_id": 101782, "eprint_status": "archive", "datestamp": "2023-08-22 04:31:11", "lastmod": "2024-02-02 21:07:49", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "id": "Chiang-Eugene", "name": { "family": "Chiang", "given": "Eugene" }, "orcid": "0000-0002-6246-2310" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Morley-C-V", "name": { "family": "Morley", "given": "Caroline V." }, "orcid": "0000-0002-4404-0456" }, { "id": "Millholland-S", "name": { "family": "Millholland", "given": "Sarah" }, "orcid": "0000-0003-3130-2282" }, { "id": "Blunt-S-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "id": "Ashok-K-B", "name": { "family": "Ashok", "given": "Katelyn B." } }, { "id": "Nielsen-E-L", "name": { "family": "Nielsen", "given": "Eric" }, "orcid": "0000-0001-6975-9056" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" } ] }, "title": "Obliquity Constraints on an Extrasolar Planetary-Mass Companion", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet systems; High resolution spectroscopy; Direct imaging; Photometry", "note": "\u00a9 2020 The American Astronomical Society. \n\nReceived 2019 November 21; revised 2020 February 11; accepted 2020 February 14; published 2020 April 1. \n\nWe thank Ian Czekala, Courtney Dressing, Daniel Fabrycky, Jeffrey Fung, Sivan Ginzburg, and Yifan Zhou for helpful conversations. M.L.B. is supported by her Heising\u2013Simons Foundation 51 Pegasi b Fellowship. E.C. acknowledges support from the Heising\u2013Simons Foundation, NASA, and the National Science Foundation. B.P.B. acknowledges support from the National Science Foundation grant AST-1909209. S.M. is supported by the NSF Graduate Research Fellowship Program under Grant DGE-1122492. S.B. is supported by a National Science Foundation Graduate Research Fellowship. This research made use of Lightkurve, a Python package for Kepler and TESS data analysis (Lightkurve Collaboration, 2018). This paper includes data collected with the TESS mission, obtained from the MAST data archive at the Space Telescope Science Institute (STScI). Funding for the TESS mission is provided by the NASA Explorer Program. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. We extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Maunakea we are privileged to be guests.\n\nPublished - Bryan_2020_AJ_159_181.pdf
Submitted - 2002.11131.pdf
", "abstract": "We place the first constraints on the obliquity of a planetary-mass companion outside of the solar system. Our target is the directly imaged system 2MASS J01225093\u20132439505 (2M0122), which consists of a 120 Myr 0.4 M\u2299 star hosting a 12\u201327 M_J companion at 50 au. We constrain all three of the system's angular-momentum vectors: how the companion spin axis, the stellar spin axis, and the orbit normal are inclined relative to our line of sight. To accomplish this, we measure projected rotation rates (v sin i) for both the star and the companion using new near-infrared high-resolution spectra with NIRSPEC at Keck Observatory. We combine these with a new stellar photometric rotation period from TESS and a published companion rotation period from Hubble Space Telescope to obtain spin-axis inclinations for both objects. We also fitted multiple epochs of astrometry, including a new observation with NIRC2/Keck, to measure 2M0122b's orbital inclination. The three line-of-sight inclinations place limits on the true de-projected companion obliquity and stellar obliquity. We find that while the stellar obliquity marginally prefers alignment, the companion obliquity tentatively favors misalignment. We evaluate possible origin scenarios. While collisions, secular spin\u2013orbit resonances, and Kozai\u2013Lidov oscillations are unlikely, formation by gravitational instability in a gravito-turbulent disk\u2014the scenario favored for brown dwarf companions to stars\u2014appears promising.", "date": "2020-04", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 181", "id_number": "CaltechAUTHORS:20200309-113347517", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200309-113347517", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation", "grant_number": "51 Pegasi b Fellowship" }, { "agency": "NSF", "grant_number": "AST-1909209" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1122492" }, { "agency": "NASA", "grant_number": "NAS 5-26555" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ab76c6", "primary_object": { "basename": "2002.11131.pdf", "url": "https://authors.library.caltech.edu/records/rrqcr-hf679/files/2002.11131.pdf" }, "related_objects": [ { "basename": "Bryan_2020_AJ_159_181.pdf", "url": "https://authors.library.caltech.edu/records/rrqcr-hf679/files/Bryan_2020_AJ_159_181.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Bryan, Marta L.; Chiang, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nmkne-0ae47", "eprint_id": 101852, "eprint_status": "archive", "datestamp": "2023-08-19 19:38:18", "lastmod": "2023-10-19 23:35:00", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gaudi-B-Scott", "name": { "family": "Gaudi", "given": "B. Scott" }, "orcid": "0000-0003-0395-9869" }, { "name": { "family": "Seager", "given": "Sara" }, "orcid": "0000-0002-6892-6948" }, { "id": "Mennesson-Bertrand", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "name": { "family": "Kiessling", "given": "Alina" } }, { "name": { "family": "Warfield", "given": "Keith" } }, { "name": { "family": "Cahoy", "given": "Kerri" } }, { "name": { "family": "Clarke", "given": "John T." } }, { "name": { "family": "Domagal-Goldman", "given": "Shawn" } }, { "name": { "family": "Feinberg", "given": "Lee" } }, { "name": { "family": "Guyon", "given": "Olivier" } }, { "name": { "family": "Kasdin", "given": "Jeremy" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Plavchan", "given": "Peter" } }, { "name": { "family": "Robinson", "given": "Tyler" } }, { "name": { "family": "Rogers", "given": "Leslie" } }, { "name": { "family": "Scowen", "given": "Paul" } }, { "name": { "family": "Somerville", "given": "Rachel" } }, { "name": { "family": "Stapelfeldt", "given": "Karl" } }, { "name": { "family": "Stark", "given": "Christopher" } }, { "name": { "family": "Stern", "given": "Daniel" } }, { "name": { "family": "Turnbull", "given": "Margaret" } }, { "name": { "family": "Amini", "given": "Rashied" } }, { "name": { "family": "Kuan", "given": "Gary" } }, { "name": { "family": "Martin", "given": "Stefan" } }, { "name": { "family": "Morgan", "given": "Rhonda" } }, { "name": { "family": "Redding", "given": "David" } }, { "name": { "family": "Stahl", "given": "H. Philip" } }, { "name": { "family": "Webb", "given": "Ryan" } }, { "name": { "family": "Alvarez-Salazar", "given": "Oscar" } }, { "name": { "family": "Arnold", "given": "William L." } }, { "name": { "family": "Arya", "given": "Manan" } }, { "name": { "family": "Balasubramanian", "given": "Bala" } }, { "name": { "family": "Baysinger", "given": "Mike" } }, { "name": { "family": "Bell", "given": "Ray" } }, { "name": { "family": "Below", "given": "Chris" } }, { "name": { "family": "Benson", "given": "Jonathan" } }, { "name": { "family": "Blais", "given": "Lindsey" } }, { "name": { "family": "Booth", "given": "Jeff" } }, { "name": { "family": "Bourgeois", "given": "Robert" } }, { "name": { "family": "Bradford", "given": "Case" } }, { "name": { "family": "Brewer", "given": "Alden" } }, { "name": { "family": "Brooks", "given": "Thomas" } }, { "name": { "family": "Cady", "given": "Eric" } }, { "name": { "family": "Caldwell", "given": "Mary" } }, { "name": { "family": "Calvet", "given": "Rob" } }, { "name": { "family": "Carr", "given": "Steven" } }, { "name": { "family": "Chan", "given": "Derek" } }, { "name": { "family": "Cormarkovic", "given": "Velibor" } }, { "name": { "family": "Coste", "given": "Keith" } }, { "name": { "family": "Cox", "given": "Charlie" } }, { "name": { "family": "Danner", "given": "Rolf" } }, { "name": { "family": "Davis", "given": "Jacqueline" } }, { "name": { "family": "Dewell", "given": "Larry" } }, { "name": { "family": "Dorsett", "given": "Lisa" } }, { "name": { "family": "Dunn", "given": "Daniel" } }, { "name": { "family": "East", "given": "Matthew" } }, { "name": { "family": "Effinger", "given": "Michael" } }, { "name": { "family": "Eng", "given": "Ron" } }, { "name": { "family": "Freebury", "given": "Greg" } }, { "name": { "family": "Garcia", "given": "Jay" } }, { "name": { "family": "Gaskin", "given": "Jonathan" } }, { "name": { "family": "Greene", "given": "Suzan" } }, { "name": { "family": "Hennessy", "given": "John" } }, { "name": { "family": "Hilgemann", "given": "Evan" } }, { "name": { "family": "Hood", "given": "Brad" } }, { "name": { "family": "Holota", "given": "Wolfgang" } }, { "name": { "family": "Howe", "given": "Scott" } }, { "name": { "family": "Huang", "given": "Pei" } }, { "name": { "family": "Hull", "given": "Tony" } }, { "name": { "family": "Hunt", "given": "Ron" } }, { "name": { "family": "Hurd", "given": "Kevin" } }, { "name": { "family": "Johnson", "given": "Sandra" } }, { "name": { "family": "Kissil", "given": "Andrew" } }, { "name": { "family": "Knight", "given": "Brent" } }, { "name": { "family": "Kolenz", "given": "Daniel" } }, { "name": { "family": "Kraus", "given": "Oliver" } }, { "name": { "family": "Krist", "given": "John" } }, { "name": { "family": "Li", "given": "Mary" } }, { "name": { "family": "Lisman", "given": "Doug" } }, { "name": { "family": "Mandic", "given": "Milan" } }, { "name": { "family": "Mann", "given": "John" } }, { "name": { "family": "Marchen", "given": "Luis" } }, { "name": { "family": "Marrese-Reading", "given": "Colleen" } }, { "name": { "family": "McCready", "given": "Jonathan" } }, { "name": { "family": "McGown", "given": "Jim" } }, { "name": { "family": "Missun", "given": "Jessica" } }, { "name": { "family": "Miyaguchi", "given": "Andrew" } }, { "name": { "family": "Moore", "given": "Bradley" } }, { "name": { "family": "Nemati", "given": "Bijan" } }, { "name": { "family": "Nikzad", "given": "Shouleh" } }, { "name": { "family": "Nissen", "given": "Joel" } }, { "name": { "family": "Novicki", "given": "Megan" } }, { "name": { "family": "Perrine", "given": "Todd" } }, { "name": { "family": "Pineda", "given": "Claudia" } }, { "name": { "family": "Polanco", "given": "Otto" } }, { "name": { "family": "Putnam", "given": "Dustin" } }, { "name": { "family": "Qureshi", "given": "Atif" } }, { "name": { "family": "Richards", "given": "Michael" } }, { "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "name": { "family": "Rodgers", "given": "Michael" } }, { "name": { "family": "Rud", "given": "Mike" } }, { "name": { "family": "Saini", "given": "Navtej" } }, { "name": { "family": "Scalisi", "given": "Dan" } }, { "name": { "family": "Scharf", "given": "Dan" } }, { "name": { "family": "Schulz", "given": "Kevin" } }, { "name": { "family": "Serabyn", "given": "Gene" } }, { "name": { "family": "Sigrist", "given": "Norbert" } }, { "name": { "family": "Sikkia", "given": "Glory" } }, { "name": { "family": "Singleton", "given": "Andrew" } }, { "name": { "family": "Shaklan", "given": "Stuart" } }, { "name": { "family": "Smith", "given": "Scott" } }, { "name": { "family": "Southerd", "given": "Bart" } }, { "name": { "family": "Stahl", "given": "Mark" } }, { "name": { "family": "Steeves", "given": "John" } }, { "name": { "family": "Sturges", "given": "Brian" } }, { "name": { "family": "Sullivan", "given": "Chris" } }, { "name": { "family": "Tang", "given": "Hao" } }, { "name": { "family": "Taras", "given": "Neil" } }, { "name": { "family": "Tesch", "given": "Jonathan" } }, { "name": { "family": "Therrell", "given": "Melissa" } }, { "name": { "family": "Tseng", "given": "Howard" } }, { "name": { "family": "Valente", "given": "Marty" } }, { "name": { "family": "Van Buren", "given": "David" } }, { "name": { "family": "Villalvazo", "given": "Juan" } }, { "name": { "family": "Warwick", "given": "Steve" } }, { "name": { "family": "Webb", "given": "David" } }, { "name": { "family": "Westerhoff", "given": "Thomas" } }, { "name": { "family": "Wofford", "given": "Rush" } }, { "name": { "family": "Wu", "given": "Gordon" } }, { "name": { "family": "Woo", "given": "Jahning" } }, { "name": { "family": "Wood", "given": "Milana" } }, { "name": { "family": "Ziemer", "given": "John" } }, { "name": { "family": "Arney", "given": "Giada" } }, { "name": { "family": "Anderson", "given": "Jay" } }, { "name": { "family": "Ma\u00edz-Apell\u00e1niz", "given": "Jes\u00fas" } }, { "name": { "family": "Bartlett", "given": "James" } }, { "name": { "family": "Belikov", "given": "Ruslan" } }, { "name": { "family": "Bendek", "given": "Eduardo" } }, { "name": { "family": "Cenko", "given": "Brad" } }, { "name": { "family": "Douglas", "given": "Ewan" } }, { "name": { "family": "Dulz", "given": "Shannon" } }, { "name": { "family": "Evans", "given": "Chris" } }, { "name": { "family": "Faramaz", "given": "Virginie" } }, { "name": { "family": "Feng", "given": "Y. Katherina" } }, { "name": { "family": "Ferguson", "given": "Harry" } }, { "name": { "family": "Follette", "given": "Kate" } }, { "name": { "family": "Ford", "given": "Saavik" } }, { "name": { "family": "Garc\u00eda", "given": "Miriam" } }, { "name": { "family": "Geha", "given": "Marla" } }, { "name": { "family": "Gelino", "given": "Dawn" } }, { "name": { "family": "G\u00f6tberg", "given": "Ylva" } }, { "name": { "family": "Hildebrandt", "given": "Sergi" } }, { "name": { "family": "Hu", "given": "Renyu" } }, { "name": { "family": "Jahnke", "given": "Knud" } }, { "name": { "family": "Kennedy", "given": "Grant" } }, { "name": { "family": "Kreidberg", "given": "Laura" } }, { "name": { "family": "Isella", "given": "Andrea" } }, { "name": { "family": "Lopez", "given": "Eric" } }, { "name": { "family": "Marchis", "given": "Franck" } }, { "name": { "family": "Macri", "given": "Lucas" } }, { "name": { "family": "Marley", "given": "Mark" } }, { "name": { "family": "Matzko", "given": "William" } }, { "name": { "family": "Mazoyer", "given": "Johan" } }, { "name": { "family": "McCandliss", "given": "Stephan" } }, { "name": { "family": "Meshkat", "given": "Tiffany" } }, { "name": { "family": "Mordasini", "given": "Christoph" } }, { "name": { "family": "Morris", "given": "Patrick" } }, { "name": { "family": "Nielsen", "given": "Eric" } }, { "name": { "family": "Newman", "given": "Patrick" } }, { "name": { "family": "Petigura", "given": "Erik" } }, { "name": { "family": "Postman", "given": "Marc" } }, { "name": { "family": "Reines", "given": "Amy" } }, { "name": { "family": "Roberge", "given": "Aki" } }, { "name": { "family": "Roederer", "given": "Ian" } }, { "name": { "family": "Ruane", "given": "Garreth" } }, { "name": { "family": "Schwieterman", "given": "Edouard" } }, { "name": { "family": "Sirbu", "given": "Dan" } }, { "name": { "family": "Spalding", "given": "Christopher" } }, { "name": { "family": "Teplitz", "given": "Harry" } }, { "name": { "family": "Tumlinson", "given": "Jason" } }, { "name": { "family": "Turner", "given": "Neal" } }, { "name": { "family": "Werk", "given": "Jessica" } }, { "name": { "family": "Wofford", "given": "Aida" } }, { "name": { "family": "Wyatt", "given": "Mark" } }, { "name": { "family": "Young", "given": "Amber" } }, { "name": { "family": "Zellem", "given": "Rob" } } ] }, "title": "The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Final Report", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019. All rights reserved. \n\nHabitable Exoplanet Observatory Final Report. \n\nThe HabEx Study Team would like to thank the following for their efforts in supporting the development of the HabEx Report: Technical reviewers, for their dedication and feedback: Randall Bartman, David Bearden, Charles Beichman, Ruslan Belikov, Andrew Coffey, Alyssa Deardroff, Alan Didion, Benji Donitz, Aigneis Frey, Anthony Freeman, Todd Gaier, Gregory Garner, Paul Graf, Ravi Kumar Kopparapu, Amanda la Venture, Roger Lee, Elizabeth Luthman, Charley Noecker, Jane Rigby, Hari Subedi, Mark Swain, Neil Zimmerman, and Steven Zusack. \n\nMembers of the Independent Cost Estimate and Independent Schedule Assessment Team, for their independent assessment: Fred Doumani, Erica Beam, and Jerry Shen Everyone involved in unlimited release review, for ability to meet our schedule needs: Alex Abramovici, Amanda Beckett, Douglas Isbell, Peter Kahn, Young Lee, Kathleen Lynn, Sunjay Moorthay, and Danette Zuniga. \n\nAki Roberge (NASA Goddard Space Flight Center) for her unflagging efforts to promote cooperation and collaboration between the LUVOIR and HabEx study teams. \n\nDisclaimer: Pre-Decisional Information \u2013 For Planning and Discussion Purposes Only This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. \n\nThe cost information contained in this document is of a budgetary and planning nature and is intended for informational purposes only. It does not constitute a commitment on the part of JPL and Caltech.\n\nSubmitted - 2001.06683.pdf
", "abstract": "The Habitable Exoplanet Observatory, or HabEx, has been designed to be the Great Observatory of the 2030s. For the first time in human history, technologies have matured sufficiently to enable an affordable space-based telescope mission capable of discovering and characterizing Earthlike planets orbiting nearby bright sunlike stars in order to search for signs of habitability and biosignatures. Such a mission can also be equipped with instrumentation that will enable broad and exciting general astrophysics and planetary science not possible from current or planned facilities. HabEx is a space telescope with unique imaging and multi-object spectroscopic capabilities at wavelengths ranging from ultraviolet (UV) to near-IR. These capabilities allow for a broad suite of compelling science that cuts across the entire NASA astrophysics portfolio. HabEx has three primary science goals: (1) Seek out nearby worlds and explore their habitability; (2) Map out nearby planetary systems and understand the diversity of the worlds they contain; (3) Enable new explorations of astrophysical systems from our own solar system to external galaxies by extending our reach in the UV through near-IR. This Great Observatory science will be selected through a competed GO program, and will account for about 50% of the HabEx primary mission. The preferred HabEx architecture is a 4m, monolithic, off-axis telescope that is diffraction-limited at 0.4 microns and is in an L2 orbit. HabEx employs two starlight suppression systems: a coronagraph and a starshade, each with their own dedicated instrument.", "date": "2020-03-11", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20200311-111308399", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200311-111308399", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.2001.06683", "primary_object": { "basename": "2001.06683.pdf", "url": "https://authors.library.caltech.edu/records/nmkne-0ae47/files/2001.06683.pdf" }, "resource_type": "monograph", "pub_year": "2020", "author_list": "Gaudi, B. Scott; Seager, Sara; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4dwzm-sw752", "eprint_id": 101711, "eprint_status": "archive", "datestamp": "2023-08-19 20:27:33", "lastmod": "2024-01-14 22:08:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Cvetojevic-N", "name": { "family": "Cvetojevic", "given": "N." } }, { "id": "Daal-M", "name": { "family": "Daal", "given": "M." }, "orcid": "0000-0002-1134-2116" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "B." } }, { "id": "Moreira-R", "name": { "family": "Moreira", "given": "R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "K." } }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "J." } }, { "id": "Leifer-Stephanie-D", "name": { "family": "Leifer", "given": "S." }, "orcid": "0000-0002-8980-7825" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Porter-M", "name": { "family": "Porter", "given": "M." } } ] }, "title": "Status and future developments of integrated photonic spectrographs for astronomy and Earth and planetary sciences", "ispublished": "unpub", "full_text_status": "public", "keywords": "Integrated photonic spectrographs, arrayed waveguide gratings, astronomy, astronomical instruments, miniturization", "note": "\u00a9 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nN. Cvetojevic acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement CoG-683029).\n\nPublished - 112870K.pdf
", "abstract": "The size and cost of astronomical instruments for extremely large telescopes (ELTs), are pushing the limits of what is feasible, requiring optical components at the very edge of achievable size and performance. Operating at the diffraction-limit, the realm of photonic technologies, allows for highly compact instruments to be realized. In particular, Integrated Photonic Spectrographs (IPSs) have the potential to replace an instrument the size of a car with one that can be held in the palm of a hand. This miniaturization in turn offers dramatic improvements in mechanical and thermal stability. Owing to the single-mode fiber feed, the performance of the spectrograph is decoupled from the telescope and the instruments point spread function can be calibrated with a much higher precision. These effects combined mean that an IPS can provide superior performance with respect to a classical bulk optic spectrograph. In this paper we provide a summary of efforts made to qualify IPSs for astronomical applications to date. These include the early characterization of arrayed waveguide gratings for multi-object injection and modifications to facilitate a continuous spectrum, to the integration of these devices into prototypical instruments and most recently the demonstration of a highly optimized instrument directly fed from an 8-m telescope. We will then outline development paths necessary for astronomy, currently underway, which include broadening operating bands, bandwidth, increasing resolution, implementing cross-dispersion on-chip and integrating these devices with other photonic technologies and detectors such as superconducting Microwave Kinetic Inductance Detector arrays. Although the focus of this work is on IPS applicability to astronomy, they may be even more ideally suited to Earth and planetary science applications.", "date": "2020-03-02", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 112870K", "id_number": "CaltechAUTHORS:20200304-112715346", "isbn": "9781510633377", "book_title": "Photonic Instrumentation Engineering VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200304-112715346", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "683029" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "contributors": { "items": [ { "id": "Soskind-Y", "name": { "family": "Soskind", "given": "Yakov" } }, { "id": "Busse-L-E", "name": { "family": "Busse", "given": "Lynda E." } } ] }, "doi": "10.1117/12.2546959", "primary_object": { "basename": "112870K.pdf", "url": "https://authors.library.caltech.edu/records/4dwzm-sw752/files/112870K.pdf" }, "resource_type": "book_section", "pub_year": "2020", "author_list": "Jovanovic, N.; Cvetojevic, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h3h9n-q4q70", "eprint_id": 101265, "eprint_status": "archive", "datestamp": "2023-08-22 04:11:43", "lastmod": "2024-02-02 21:07:51", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Jontof-Hutter-D", "name": { "family": "Jontof-Hutter", "given": "Daniel" }, "orcid": "0000-0002-6227-7510" }, { "id": "Shporer-A", "name": { "family": "Shporer", "given": "Avi" }, "orcid": "0000-0002-1836-3120" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Liu-Leo-J", "name": { "family": "Liu", "given": "Leo" } }, { "id": "Thorngren-D-P", "name": { "family": "Thorngren", "given": "Daniel" }, "orcid": "0000-0002-5113-8558" }, { "id": "Lee-Eve-J", "name": { "family": "Lee", "given": "Eve J." }, "orcid": "0000-0002-1228-9820" }, { "id": "Chachan-Y", "name": { "family": "Chachan", "given": "Yayaati" }, "orcid": "0000-0003-1728-8269" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Wright-J-T", "name": { "family": "Wright", "given": "Jason T." }, "orcid": "0000-0001-6160-5888" } ] }, "title": "Diffuser-assisted Infrared Transit Photometry for Four Dynamically Interacting Kepler Systems", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanet astronomy; Exoplanet dynamics; Ground-based astronomy; Exoplanet systems", "note": "\u00a9 2020 The American Astronomical Society. \n\nReceived 2019 July 9; revised 2019 December 20; accepted 2019 December 24; published 2020 February 13. \n\nThe authors thank the entire Palomar Observatory staff for their tireless support of our work. We additionally acknowledge Jessie Christiansen for helpful discussions on KOI-1783, B.J. Fulton for assistance with the California Kepler Survey data set, Erik Petigura for useful comments on time-correlated noise and joint RV\u2013TTV modeling, Nicole Wallack for discussions on light-curve fitting, and Gudmundur Stefansson for conversations regarding diffuser-assisted photometry at Palomar and other observatories. Support for this program was provided by NSF Career grant 1555095 and by NASA Origins grant NNX14AD22G. This work was partially supported by funding from the Center for Exoplanets and Habitable Worlds, which is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. \n\nFacilities: Hale (WIRC - , PHARO) - , Kepler - , OHP:1.52 m (SOPHIE) - , PO:1.5 m (ROBO-AO) - , Keck:II (NIRC2) - , ADS - , Exoplanet Archive - . \n\nSoftware: photutils (Bradley et al. 2016), numpy (van der Walt et al. 2011), astropy (Astropy Collaboration et al. 2013; Collaboration et al. 2018), scipy (Jones et al. 2001), matplotlib (Hunter 2007), batman (Kreidberg 2015), emcee (Foreman-Mackey et al. 2013), corner (Foreman-Mackey 2016), PyKE (Still & Barclay 2012), Aladin Lite (Bonnarel et al. 2000; Boch & Fernique 2014).\n\nPublished - Vissapragada_2020_AJ_159_108.pdf
Accepted Version - 1907.04445.pdf
", "abstract": "We present ground-based infrared transit observations for four dynamically interacting Kepler planets, including Kepler-29b, Kepler-36c, KOI-1783.01, and Kepler-177c, obtained using the Wide-field Infrared Camera on the Hale 200 inch telescope at Palomar Observatory. By utilizing an engineered diffuser and custom guiding software, we mitigate time-correlated telluric and instrumental noise sources in these observations. We achieve an infrared photometric precision comparable to or better than that of space-based observatories such as the Spitzer Space Telescope, and detect transits with greater than 3\u03c3 significance for all planets. For Kepler-177c (J = 13.9), our measurement uncertainties are only 1.2 times the photon noise limit and 1.9 times better than the predicted photometric precision for Spitzer IRAC photometry of this same target. We find that a single transit observation obtained 4\u20135 yr after the end of the original Kepler mission can reduce dynamical mass uncertainties by as much as a factor of 3 for these systems. Additionally, we combine our new observations of KOI-1783.01 with information from the literature to confirm the planetary nature of this system. We discuss the implications of our new mass and radius constraints in the context of known exoplanets with low incident fluxes, and we note that Kepler-177c may be a more massive analog to the currently known super-puffs given its core mass (3.8 \u00b1 0.9 M\u2299) and large gas-to-core ratio (2.8 \u00b1 0.7). Our demonstrated infrared photometric performance opens up new avenues for ground-based observations of transiting exoplanets previously thought to be restricted to space-based investigation.", "date": "2020-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 108", "id_number": "CaltechAUTHORS:20200213-090300949", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200213-090300949", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1555095" }, { "agency": "NASA", "grant_number": "NNX14AD22G" }, { "agency": "Center for Exoplanets and Habitable Worlds" }, { "agency": "Pennsylvania State University" }, { "agency": "Eberly College of Science" }, { "agency": "Pennsylvania Space Grant Consortium" } ] }, "local_group": { "items": [ { "id": "TAPIR" }, { "id": "Walter-Burke-Institute-for-Theoretical-Physics" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/ab65c8", "primary_object": { "basename": "1907.04445.pdf", "url": "https://authors.library.caltech.edu/records/h3h9n-q4q70/files/1907.04445.pdf" }, "related_objects": [ { "basename": "Vissapragada_2020_AJ_159_108.pdf", "url": "https://authors.library.caltech.edu/records/h3h9n-q4q70/files/Vissapragada_2020_AJ_159_108.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Vissapragada, Shreyas; Jontof-Hutter, Daniel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3anw2-1zr92", "eprint_id": 101057, "eprint_status": "archive", "datestamp": "2023-08-22 04:10:48", "lastmod": "2023-10-19 22:24:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop-Sayson", "given": "Jorge" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "Jason" } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } } ] }, "title": "High-contrast Demonstration of an Apodized Vortex Coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanets; Coronographic imaging; Direct imaging; Space telescopes", "note": "\u00a9 2020 The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2019 November 1; revised 2019 December 7; accepted 2019 December 16; published 2020 February 3. \n\nThe first author J.L.S. is partially supported by the National Science Foundation AST-ATI Grant 1710210. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - pdf
", "abstract": "High-contrast imaging is the primary path to the direct detection and characterization of Earth-like planets around solar-type stars; a cleverly designed internal coronagraph suppresses the light from the star, revealing the elusive circumstellar companions. However, future large-aperture telescopes (>4 m in diameter) will likely have segmented primary mirrors, which cause additional diffraction of unwanted stellar light. Here we present the first high-contrast laboratory demonstration of an apodized vortex coronagraph, in which an apodizer is placed upstream of a vortex focal plane mask to improve its performance with a segmented aperture. The gray-scale apodization is numerically optimized to yield a better sensitivity to faint companions assuming an aperture shape similar to the LUVOIR-B concept. Using wavefront sensing and control over a one-sided dark hole, we achieve a raw contrast of 2 \u00d7 10\u207b\u2078 in monochromatic light at 775 nm, and a raw contrast of 4 \u00d7 10\u207b\u2078 in a 10% bandwidth. These results open the path to a new family of coronagraph designs, optimally suited for next-generation segmented space telescopes.", "date": "2020-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 79", "id_number": "CaltechAUTHORS:20200203-092720940", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200203-092720940", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1720210" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ab6329", "primary_object": { "basename": "pdf", "url": "https://authors.library.caltech.edu/records/3anw2-1zr92/files/pdf" }, "resource_type": "article", "pub_year": "2020", "author_list": "Llop-Sayson, Jorge; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8279q-ysm77", "eprint_id": 100006, "eprint_status": "archive", "datestamp": "2023-08-22 04:08:16", "lastmod": "2023-10-18 18:59:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Uyama-Taichi", "name": { "family": "Uyama", "given": "Taichi" }, "orcid": "0000-0002-6879-3030" }, { "name": { "family": "Muto", "given": "Takayuki" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "name": { "family": "Hashimoto", "given": "Jun" }, "orcid": "0000-0002-3053-3575" }, { "name": { "family": "Kudo", "given": "Tomoyuki" }, "orcid": "0000-0002-9294-1793" }, { "name": { "family": "Kuzuhara", "given": "Masayuki" }, "orcid": "0000-0002-4677-9182" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "name": { "family": "Akiyama", "given": "Eiji" }, "orcid": "0000-0002-5082-8880" }, { "name": { "family": "Bae", "given": "Jaehan" } }, { "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "name": { "family": "Follette", "given": "Katherine B." }, "orcid": "0000-0002-7821-0695" }, { "name": { "family": "Fukagawa", "given": "Misato" } }, { "name": { "family": "Guidi", "given": "Greta" } }, { "name": { "family": "Huby", "given": "Elsa" } }, { "name": { "family": "Kwon", "given": "Jungmi" }, "orcid": "0000-0003-2815-7774" }, { "name": { "family": "Mayama", "given": "Satoshi" }, "orcid": "0000-0002-3424-6266" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "name": { "family": "Ricci", "given": "Luca" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "name": { "family": "Testi", "given": "Leonardo" }, "orcid": "0000-0003-1859-3070" }, { "id": "Wallack-N-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "name": { "family": "Williams", "given": "Jonathan" }, "orcid": "0000-0001-5058-695X" }, { "name": { "family": "Zhu", "given": "Zhaohuan" }, "orcid": "0000-0003-3616-6822" } ] }, "title": "Near-Infrared Imaging of a Spiral in the CQ Tau Disk", "ispublished": "pub", "full_text_status": "public", "keywords": "Protoplanetary disks; Coronagraphic imaging", "note": "\u00a9 2020 The American Astronomical Society. \n\nReceived 2019 September 3; revised 2020 January 17; accepted 2020 January 23; published 2020 February 21. \n\nThe authors would like to thank the anonymous referees for the constructive comments and suggestions to improve the quality of the paper. We wish to thank Mitsuhiko Honda for constructive comments to improve our discussions with the NIRC2 result. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. A part of this research is based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatories of Japan. Based in part on data collected at Subaru telescope and obtained from the SMOKA, which is operated by the Astronomy Data Center, National Astronomical Observatory of Japan. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2017.1.01404.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. This research has made use of NASA's Astrophysics Data System Bibliographic Services. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of the VizieR catalog access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in Ochsenbein et al. (2000). \n\nT.U. acknowledges JSPS overseas research fellowship. This work was supported by MEXT/JSPS KAKENHI grant Nos. 15H02063, 17K05399, 18H05442, 19H00703, 19H05089, and 19K03932. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). The material is based upon work supported by NASA under award No. 80NSSC19K0294. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Program (ERC grant Agreement no. 337569) and Horizon 2020 Research and Innovation Program (grant agreement No. 819155), and from the Wallonia-Brussels Federation (grant for Concerted Research Actions). V.C. acknowledges funding from the Australian Research Council via DP180104235. O.A. acknowledges funding from FRS-FNRS. J.B. acknowledges support by NASA through the NASA Hubble Fellowship grant #HST-HF2-51427.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. \n\nThe authors wish to acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Uyama_2020_AJ_159_118.pdf
Submitted - 1910.07605.pdf
", "abstract": "We present L'-band Keck/NIRC2 imaging and H-band Subaru/AO188+HiCIAO polarimetric observations of the CQ Tau disk with a new spiral arm. Apart from the spiral feature, our observations could not detect any companion candidates. We traced the spiral feature from the r\u00b2-scaled High-Contrast Coronographic Imager for Adaptive Optics (HiCIAO) polarimetric intensity image and the fitted result is used for forward modeling to reproduce the ADI-reduced NIRC2 image. We estimated the original surface brightness after throughput correction in the L' band to be ~126 mJy arcsec\u207b\u00b2 at most. We suggest that the grain temperature of the spiral may be heated up to ~200 K in order to explain both of the H- and L'-band results. The H-band emission at the location of the spiral originates from the scattering from the disk surface while both scattering and thermal emission may contribute to the L'-band emission. If the central star is only the light source of scattered light, the spiral emission at the L' band should be thermal emission. If an inner disk also acts as the light source, the scattered light and the thermal emission may equally contribute to the L'-band spiral structure.", "date": "2020-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "159", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 118", "id_number": "CaltechAUTHORS:20191122-075655860", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191122-075655860", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Ministry of Education, Culture, Sports, Science and Technology (MEXT)" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "15H02063" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "17K05399" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "18H05442" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "19H00703" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "19H05089" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "19K03932" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Australian Research Council", "grant_number": "DP180104235" }, { "agency": "NASA", "grant_number": "80NSSC19K0294" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "European Research Council (ERC)", "grant_number": "819155" }, { "agency": "Wallonia-Brussels Federation" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51427.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ab7006", "primary_object": { "basename": "1910.07605.pdf", "url": "https://authors.library.caltech.edu/records/8279q-ysm77/files/1910.07605.pdf" }, "related_objects": [ { "basename": "Uyama_2020_AJ_159_118.pdf", "url": "https://authors.library.caltech.edu/records/8279q-ysm77/files/Uyama_2020_AJ_159_118.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Uyama, Taichi; Muto, Takayuki; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mrr4t-ywy77", "eprint_id": 100002, "eprint_status": "archive", "datestamp": "2023-08-19 19:21:59", "lastmod": "2023-10-18 18:59:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Yung-Y-L", "name": { "family": "Yung", "given": "Yuk" }, "orcid": "0000-0002-4263-2562" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Kervella-P", "name": { "family": "Kervella", "given": "Pierre" }, "orcid": "0000-0003-0626-1749" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Lissauer-J-J", "name": { "family": "Lissauer", "given": "Jack J." }, "orcid": "0000-0001-6513-1659" }, { "id": "Quarles-B", "name": { "family": "Quarles", "given": "Billy" } }, { "id": "Lagage-P-O", "name": { "family": "Lagage", "given": "Pierre-Olivier" } }, { "id": "Dicken-D", "name": { "family": "Dicken", "given": "Daniel" } }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Ressler-M-E", "name": { "family": "Ressler", "given": "Mike" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Bendek-E-A", "name": { "family": "Bendek", "given": "Eduardo" } }, { "id": "Leisenring-J", "name": { "family": "Leisenring", "given": "Jarron" }, "orcid": "0000-0002-0834-6140" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" } ] }, "title": "Searching for Planets Orbiting \u03b1 Cen A with the James Webb Space Telescope", "ispublished": "pub", "full_text_status": "public", "keywords": "infrared: planetary systems \u2013 planetary systems \u2013 planets and satellites: detection \u2013 space vehicles: instruments", "note": "\u00a9 2019. The Astronomical Society of the Pacific. \n\nReceived 2019 August 25; accepted 2019 October 14; published 2019 December 12. \n\nSome of the research described in this publication was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Copyright 2019 California Inst of Technology. All rights reserved.\n\nPublished - Beichman_2020_PASP_132_015002.pdf
Accepted Version - 1910.09709.pdf
", "abstract": "\u03b1 Centauri A is the closest solar-type star to the Sun and offers an excellent opportunity to detect the thermal emission of a mature planet heated by its host star. The MIRI coronagraph on JWST can search the 1-3 AU (1\"-2\") region around \u03b1 Cen A which is predicted to be stable within the \u03b1 Cen AB system. We demonstrate that with reasonable performance of the telescope and instrument, a 20 hr program combining on-target and reference star observations at 15.5 um could detect thermal emission from planets as small as ~5 R\u2295. Multiple visits every 3-6 months would increase the geometrical completeness, provide astrometric confirmation of detected sources, and push the radius limit down to ~3 R\u2295. An exozodiacal cloud only a few times brighter than our own should also be detectable, although a sufficiently bright cloud might obscure any planet present in the system. While current precision radial velocity (PRV) observations set a limit of 50-100 M\u2295 at 1-3 AU for planets orbiting \u03b1 Cen A, there is a broad range of exoplanet radii up to 10 RE consistent with these mass limits. A carefully planned observing sequence along with state-of-the-art post-processing analysis could reject the light from \u03b1 Cen A at the level of ~10\u207b\u2075 at 1\"-2\" and minimize the influence of \u03b1 Cen B located 7-8\" away in the 2022-2023 timeframe. These space-based observations would complement on-going imaging experiments at shorter wavelengths as well as PRV and astrometric experiments to detect planets dynamically. Planetary demographics suggest that the likelihood of directly imaging a planet whose mass and orbit are consistent with present PRV limits is small, ~5%, and possibly lower if the presence of a binary companion further reduces occurrence rates. However, at a distance of just 1.34 pc, \u03b1 Cen A is our closest sibling star and certainly merits close scrutiny.", "date": "2020-01", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "132", "number": "1007", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 015002", "id_number": "CaltechAUTHORS:20191121-152416477", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191121-152416477", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.1088/1538-3873/ab5066", "primary_object": { "basename": "1910.09709.pdf", "url": "https://authors.library.caltech.edu/records/mrr4t-ywy77/files/1910.09709.pdf" }, "related_objects": [ { "basename": "Beichman_2020_PASP_132_015002.pdf", "url": "https://authors.library.caltech.edu/records/mrr4t-ywy77/files/Beichman_2020_PASP_132_015002.pdf" } ], "resource_type": "article", "pub_year": "2020", "author_list": "Beichman, Charles; Ygouf, Marie; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k7487-2ve48", "eprint_id": 100069, "eprint_status": "archive", "datestamp": "2023-08-19 16:49:51", "lastmod": "2024-01-14 22:02:57", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "name": { "family": "Baudoz", "given": "Pierre" } }, { "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Crill-B-P", "name": { "family": "Crill", "given": "Brendan" }, "orcid": "0000-0002-4650-8518" }, { "id": "Fogarty-K", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "name": { "family": "Galicher", "given": "Raphael" } }, { "name": { "family": "Groff", "given": "Tyler" } }, { "name": { "family": "Guyon", "given": "Olivier" } }, { "name": { "family": "Juanola-Parramon", "given": "Roser" } }, { "name": { "family": "Kasdin", "given": "Jeremy" } }, { "name": { "family": "Leboulleux", "given": "Lucie" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Prada-C-M", "name": { "family": "Prada", "given": "Camilo Mejia" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "name": { "family": "Perrin", "given": "Marshall" } }, { "name": { "family": "Pueyo", "given": "Laurent" } }, { "name": { "family": "Roberge", "given": "Aki" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "name": { "family": "Sirbu", "given": "Dan" } }, { "name": { "family": "Soummer", "given": "Remi" }, "orcid": "0000-0003-2753-2819" }, { "name": { "family": "Stark", "given": "Chris" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "name": { "family": "Zimmerman", "given": "Neil" } } ] }, "title": "High-Contrast Testbeds for Future Space-Based Direct Imaging Exoplanet Missions", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019.\n\nJohan Mazoyer acknowledges support for this work was provided by NASA through the NASA Hubble Fellowship grant #HST-HF2-51414 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology.\n\nSubmitted - 1907.09508.pdf
", "abstract": "Instrumentation techniques in the field of direct imaging of exoplanets have greatly advanced over the last two decades. Two of the four NASA-commissioned large concept studies involve a high-contrast instrument for the imaging and spectral characterization of exo-Earths from space: LUVOIR and HabEx. This whitepaper describes the status of 8 optical testbeds in the US and France currently in operation to experimentally validate the necessary technologies to image exo-Earths from space. They explore two complementary axes of research: (i) coronagraph designs and manufacturing and (ii) active wavefront correction methods and technologies. Several instrument architectures are currently being analyzed in parallel to provide more degrees of freedom for designing the future coronagraphic instruments. The necessary level of performance has already been demonstrated in-laboratory for clear off-axis telescopes (HabEx-like) and important efforts are currently in development to reproduce this accomplishment on segmented and/or on-axis telescopes (LUVOIR-like) over the next two years.", "date": "2019-11-26", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20191126-132654179", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191126-132654179", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51414" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1907.09508", "primary_object": { "basename": "1907.09508.pdf", "url": "https://authors.library.caltech.edu/records/k7487-2ve48/files/1907.09508.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Mazoyer, Johan; Baudoz, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6mwqz-4rc54", "eprint_id": 99985, "eprint_status": "archive", "datestamp": "2023-08-19 17:17:20", "lastmod": "2024-02-02 21:12:06", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Hover-D-J", "name": { "family": "Hover", "given": "David" } }, { "id": "Blake-G-A", "name": { "family": "Blake", "given": "Geoffrey A." }, "orcid": "0000-0003-0787-1610" }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne" } }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew" }, "orcid": "0000-0001-8638-0320" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David" }, "orcid": "0000-0002-5741-3047" } ] }, "title": "High-resolution Infrared Spectrograph for Exoplanet Characterization with the Keck and Thirty Meter Telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "Astro2020 APC White Paper: Optical and Infrared Observations from the Ground. 10 July 2019.\n\nSubmitted - 1908.03623.pdf
", "abstract": "HISPEC (High-resolution Infrared Spectrograph for Exoplanet Characterization) is a proposed diffraction-limited spectrograph for the W.M. Keck Observatory, and a pathfinder for the MODHIS facility project (Multi-Object Diffraction-limited High-resolution Infrared Spectrograph) on the Thirty Meter Telescope. HISPEC/MODHIS builds on diffraction-limited spectrograph designs which rely on adaptively corrected single-mode fiber feeds. Seeing-limited high-resolution spectrographs, by virtue of the conservation of beam etendue, grow in volume following a D^3 power law (D is the telescope diameter), and are subject to daunting challenges associated with their large size. Diffraction-limited spectrographs fed by single mode fibers are decoupled from the telescope input, and are orders of magnitude more compact and have intrinsically stable line spread functions. Their efficiency is directly proportional to the performance of the adaptive optics (AO) system. AO technologies have matured rapidly over the past two decades and are baselined for future extremely large telescopes. HISPEC/MODHIS will take R>100,000 spectra of a few objects in a 10\" field-of-view sampled at the diffraction limit (~10-50 mas), simultaneously from 0.95 to 2.4 microns (y-K). The scientific scope ranges from exoplanet infrared precision radial velocities, spectroscopy of transiting, close-in, and directly imaged exoplanets (atmospheric composition and dynamics, RM effect, spin measurements, Doppler imaging), brown dwarf characterization, stellar physics/chemistry, proto-planetary disk kinematics/composition, Solar system, extragalactic science, and cosmology. HISPEC/MODHIS features a compact, cost-effective design optimized to fully exploit the existing Keck-AO and future TMT-NFIRAOS infrastructures and boost the scientific reach of Keck Observatory and TMT soon after first light.", "date": "2019-11-21", "date_type": "published", "id_number": "CaltechAUTHORS:20191121-110551588", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191121-110551588", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.48550/arXiv.1908.03623", "primary_object": { "basename": "1908.03623.pdf", "url": "https://authors.library.caltech.edu/records/6mwqz-4rc54/files/1908.03623.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Mawet, Dimitri; Beichman, Charles; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z7xm4-xck80", "eprint_id": 99605, "eprint_status": "archive", "datestamp": "2023-08-19 18:31:12", "lastmod": "2023-10-18 18:35:17", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fukui-Akihiko", "name": { "family": "Fukui", "given": "A." }, "orcid": "0000-0002-4909-5763" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" } ] }, "title": "Kojima-1Lb Is a Mildly Cold Neptune around the Brightest Microlensing Host Star", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2019 May 24; revised 2019 September 16; accepted 2019 September 25; published 2019 October 31. \n\nWe thank the anonymous referee for a lot of thoughtful comments. A.F. thanks T. Kimura and H. Kawahara for meaningful discussions on the formation and abundance of Neptunes around the snow line. A.F. also thanks A. Nucita and A. Mann for kindly providing data used in their papers. \n\nThis article is based on observations made with the MuSCAT2 instrument, developed by ABC, at Telescopio Carlos S\u00e1nchez, operated on the island of Tenerife by the IAC in the Spanish Observatorio del Teide. We acknowledge ISAS/JAXA for the use of its facility through the inter-university research system. A.Y. is grateful to Mizuki Isogai, Akira Arai, and Hideyo Kawakita for their technical support on observations with the Araki telescope. D.S. acknowledges The Open University for the use of the COAST telescope. A.F. acknowledges the MOA collaboration/Osaka University for the use of the computing cluster. \n\nThis work was partly supported by JSPS KAKENHI grant Nos. JP25870893, JP16K17660, JP17H02871, JP17H04574, JP18H01265, and JP18H05439; MEXT KAKENHI grant Nos. JP17H06362 and JP23103004; and JST PRESTO grant No. JPMJPR1775. This work was also partially supported by the Optical and Near-Infrared Astronomy Inter-University Cooperation Program of the MEXT of Japan and the JSPS and NSF under the JSPS-NSF Partnerships for International Research and Education. This work was partly financed by the Spanish Ministry of Economics and Competitiveness through grants ESP2013-48391-C4-2-R and AYA2015-69350-C3-2-P. Y.T. acknowledges the support of DFG priority program SPP 1992 \"Exploring the Diversity of Extrasolar Planets\" (WA 1047/11-1). S.Sh. acknowledges support from grants APVV-15-0458 and VEGA 2/0008/17.\n\nPublished - Fukui_2019_AJ_158_206.pdf
Accepted Version - 1909.11802.pdf
", "abstract": "We report the analysis of additional multiband photometry and spectroscopy and new adaptive optics (AO) imaging of the nearby planetary microlensing event TCP J05074264+2447555 (Kojima-1), which was discovered toward the Galactic anticenter in 2017 (Nucita et al.). We confirm the planetary nature of the light-curve anomaly around the peak while finding no additional planetary feature in this event. We also confirm the presence of apparent blending flux and the absence of significant parallax signal reported in the literature. The AO image reveals no contaminating sources, making it most likely that the blending flux comes from the lens star. The measured multiband lens flux, combined with a constraint from the microlensing model, allows us to narrow down the previously unresolved mass and distance of the lens system. We find that the primary lens is a dwarf on the K/M boundary (0.581 \u00b1 0.033 M\u2299) located at 505 \u00b1 47 pc, and the companion (Kojima-1Lb) is a Neptune-mass planet (20.0 \u00b1 2.0 M\u2295) with a semimajor axis of 1.08^(+0.62)_(-0.18) au. This orbit is a few times smaller than those of typical microlensing planets and is comparable to the snow-line location at young ages. We calculate that the a priori detection probability of Kojima-1Lb is only ~35%, which may imply that Neptunes are common around the snow line, as recently suggested by the transit and radial velocity techniques. The host star is the brightest among the microlensing planetary systems (K_s = 13.7), offering a great opportunity to spectroscopically characterize this system, even with current facilities.", "date": "2019-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "158", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 206", "id_number": "CaltechAUTHORS:20191031-144059352", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191031-144059352", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP25870893" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP16K17660" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP17H02871" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP17H04574" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP18H01265" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP18H05439" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP17H06362" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "JP23103004" }, { "agency": "Japan Science and Technology Agency", "grant_number": "JPMJPR1775" }, { "agency": "Ministry of Education, Culture, Sports, Science and Technology (MEXT)" }, { "agency": "NSF" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "ESP2013-48391-C4-2-R" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "AYA2015-69350-C3-2-P. Y.T" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "SPP 1992" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "WA 1047/11-1" }, { "agency": "Slovak Research and Development Agency", "grant_number": "APVV-15-0458" }, { "agency": "Russian Foundation for Basic Research", "grant_number": "VEGA 2/0008/17" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ab487f", "primary_object": { "basename": "1909.11802.pdf", "url": "https://authors.library.caltech.edu/records/z7xm4-xck80/files/1909.11802.pdf" }, "related_objects": [ { "basename": "Fukui_2019_AJ_158_206.pdf", "url": "https://authors.library.caltech.edu/records/z7xm4-xck80/files/Fukui_2019_AJ_158_206.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Fukui, A.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zfc34-edf92", "eprint_id": 99929, "eprint_status": "archive", "datestamp": "2023-08-19 18:32:39", "lastmod": "2023-10-18 18:55:42", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J.-R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "C." }, "orcid": "0000-0001-8982-1654" } ] }, "title": "Minimization of non-common path aberrations at the Palomar telescope using a self-coherent camera", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 techniques: high angular resolution", "note": "\u00a9 2019 R. Galicher et al. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. \n\nReceived 10 July 2019; Accepted 16 September 2019; Published online 07 November 2019. \n\nThe authors thank the R\u00e9gion \u00cele-de-France and the Science Council of the Paris Observatory for their support of this work.\n\nPublished - aa36282-19.pdf
Accepted Version - 1909.09130.pdf
", "abstract": "Context. The two main advantages of exoplanet imaging are the discovery of objects in the outer part of stellar systems, which constrains the models of planet formation, and its ability to spectrally characterize the planets to study their atmospheres. It is, however, challenging because exoplanets are up to 10\u00b9\u2070 times fainter than their stars and are separated by a fraction of an arcsecond. Current instruments like SPHERE-VLT or GPI-Gemini detect young and massive planets only because of non-common path aberrations (NCPA) that are not corrected by the adaptive optics system. To probe fainter exoplanets a new instruments capable of minimizing the NCPA is needed. One solution is the self-coherent camera (SCC) focal plane wavefront sensor which is able to attenuate the starlight by factors of up to several 10\u2078 in the laboratory in space-like conditions. \n\nAims. In this paper, we demonstrate the SCC on the sky for the first time. \n\nMethods. We installed an SCC on the stellar double coronagraph instrument at the Hale telescope. We minimize the NCPA that limited the vortex coronagraph performance. We then compared this procedure to the standard procedure used at Palomar. \n\nResults. On internal sources, we demonstrated that the SCC improves the coronagraphic detection limit by a factor of 4\u201320 between 1.5 and 5\u2006\u03bb/D. Using this SCC calibration, the on-sky contrast is improved by a factor of 5 between 2 and 4\u2006\u03bb/D. These results prove the ability of the SCC to be implemented in an existing instrument. \n\nConclusions. This paper highlights two interests of the self-coherent camera. First, the SCC can minimize the speckle intensity in the field of view, especially the ones that are very close to the star where many exoplanets are to be discovered. Then the SCC has a 100% efficiency with science time as each image can be used for both science and NCPA minimization.", "date": "2019-11", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "631", "publisher": "EDP Sciences", "pagerange": "Art. No. A143", "id_number": "CaltechAUTHORS:20191119-102223823", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191119-102223823", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "R\u00e9gion \u00cele-de-France" }, { "agency": "Paris Observatory" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201936282", "primary_object": { "basename": "aa36282-19.pdf", "url": "https://authors.library.caltech.edu/records/zfc34-edf92/files/aa36282-19.pdf" }, "related_objects": [ { "basename": "1909.09130.pdf", "url": "https://authors.library.caltech.edu/records/zfc34-edf92/files/1909.09130.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Galicher, R.; Baudoz, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kvnsc-cn042", "eprint_id": 99219, "eprint_status": "archive", "datestamp": "2023-08-22 02:51:59", "lastmod": "2023-10-18 17:58:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Dupuy-T-J", "name": { "family": "Dupuy", "given": "Trent J." }, "orcid": "0000-0001-9823-1445" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Best-W-M-J", "name": { "family": "Best", "given": "William M. J." }, "orcid": "0000-0003-0562-1511" }, { "id": "Mann-A-W", "name": { "family": "Mann", "given": "Andrew W." }, "orcid": "0000-0003-3654-1602" }, { "id": "Tucker-M-A", "name": { "family": "Tucker", "given": "Michael A." }, "orcid": "0000-0002-2471-8442" }, { "id": "Zhang-Zhoujian", "name": { "family": "Zhang", "given": "Zhoujian" } }, { "id": "Baraffe-Isabelle", "name": { "family": "Baraffe", "given": "Isabelle" } }, { "id": "Chabrier-Giles", "name": { "family": "Chabrier", "given": "Gilles" }, "orcid": "0000-0002-8342-9149" }, { "id": "Forveille-Thierry", "name": { "family": "Forveille", "given": "Thierry" } }, { "id": "Metchev-S-A", "name": { "family": "Metchev", "given": "Stanimir A." }, "orcid": "0000-0003-3050-8203" }, { "id": "Tremblin-Pascal", "name": { "family": "Tremblin", "given": "Pascal" }, "orcid": "0000-0001-6172-3403" }, { "id": "Do-Aaron", "name": { "family": "Do", "given": "Aaron" }, "orcid": "0000-0003-3429-7845" }, { "id": "Payne-A-V", "name": { "family": "Payne", "given": "Anna V." } }, { "id": "Shappee-B-J", "name": { "family": "Shappee", "given": "B. J." }, "orcid": "0000-0003-4631-1149" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Wetherell-Ed", "name": { "family": "Wetherell", "given": "Ed" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "WISE J072003.20-084651.2B is a Massive T Dwarf", "ispublished": "pub", "full_text_status": "public", "keywords": "Brown dwarfs; Astrometry; Visual binary stars; Astrometric binary stars; T dwarfs; M dwarf stars", "note": "\u00a9 2019 The American Astronomical Society.\n\nReceived 2019 June 7; revised 2019 August 11; accepted 2019 August 18; published 2019 October.\n\nData presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.\n\nBased on data obtained with WIRCam, a joint project of CFHT, Taiwan, Korea, Canada, France, at the Canada\u2013France\u2013Hawaii Telescope, which is operated by the National Research Council of Canada, the Institute National des Sciences de l'Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii.\n\nT.J.D. acknowledges research support from Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., on behalf of the international Gemini partnership of Argentina, Brazil, Canada, Chile, the Republic of Korea, and the United States of America. M.C.L. acknowledges National Science Foundation (NSF) grant AST-1518339. The near-infrared pyramid wavefront sensor is supported by NSF grant AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support from the National Science Foundation under grant AST-1106391. M.A.T. acknowledges support from the DOE CSGF through grant DE-SC0019323. Our research has employed NASA ADS; SIMBAD; VizieR; and J. R. A. Davenport's IDL implementation of the cubehelix color scheme (Green 2011).\n\nFacilities: Keck:II (LGS AO - , NIRC2 - , PyWFS AO) - , CFHT (WIRCam) - , IRTF (SpeX) - , UH:2.2 m (SNIFS). -\n\nSoftware: Spextool (Cushing et al. 2004), emcee (Foreman-Mackey et al. 2013), M_-M_K- (Mann et al. 2019).\n\nPublished - Dupuy_2019_AJ_158_174.pdf
Accepted Version - 1908.06994.pdf
", "abstract": "We present individual dynamical masses for the nearby M9.5+T5.5 binary WISE J072003.20\u2212084651.2AB, a.k.a. Scholz's star. Combining high-precision Canada\u2013France\u2013Hawaii Telescope/WIRCam photocenter astrometry and Keck adaptive optics resolved imaging, we measure the first high-quality parallactic distance (6.80^(+0.05)_(\u22120.06) pc) and orbit (8.06^(+0.24)_(\u22120.25) yr period) for this system composed of a low-mass star and brown dwarf. We find a moderately eccentric orbit (e = 0.240^(+0.009)_(\u22120.010)), incompatible with previous work based on less data, and dynamical masses of 99 \u00b1 6 M_(Jup) and 66 \u00b1 4 M_(Jup) for the two components. The primary mass is marginally inconsistent (2.1\u03c3) with the empirical mass\u2013magnitude\u2013metallicity relation and models of main-sequence stars. The relatively high mass of the cold (T_(eff) = 1250\u00b140 K) brown dwarf companion indicates an age older than a few gigayears, in accord with age estimates for the primary star, and is consistent with our recent estimate of \u224870 M_(Jup) for the stellar/substellar boundary among the field population. Our improved parallax and proper motion, as well as an orbit-corrected system velocity, improve the accuracy of the system's close encounter with the solar system by an order of magnitude. WISE J0720\u22120846AB passed within 68.7 \u00b1 2.0 kau of the Sun 80.5 \u00b1 0.7 kyr ago, passing through the outer Oort cloud where comets can have stable orbits.", "date": "2019-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "158", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 174", "id_number": "CaltechAUTHORS:20191010-135451169", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191010-135451169", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Gemini Observatory" }, { "agency": "Association of Universities for Research in Astronomy (AURA)" }, { "agency": "NSF", "grant_number": "AST-1518339" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-SC0019323" }, { "agency": "Department of Energy (DOE)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/ab3cd1", "primary_object": { "basename": "1908.06994.pdf", "url": "https://authors.library.caltech.edu/records/kvnsc-cn042/files/1908.06994.pdf" }, "related_objects": [ { "basename": "Dupuy_2019_AJ_158_174.pdf", "url": "https://authors.library.caltech.edu/records/kvnsc-cn042/files/Dupuy_2019_AJ_158_174.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Dupuy, Trent J.; Liu, Michael C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2cdcv-z7f86", "eprint_id": 98614, "eprint_status": "archive", "datestamp": "2023-08-19 17:49:50", "lastmod": "2024-01-14 21:56:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zhang-Manxuan", "name": { "family": "Zhang", "given": "Manxuan" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } } ] }, "title": "Novel implementation of a Kalman filter for speckle nulling with a fiber injection unit", "ispublished": "unpub", "full_text_status": "public", "keywords": "Vortex Coronagraph, Fiber Injection Unit, Speckle Nulling, Kalman Filter, Spectrograph, Exoplanet Characterization, Starlight-Suppression, High-Contrast Imaging", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 111171X.pdf
", "abstract": "High dispersion coronagraphy (HDC) is a technique that combines high contrast imaging techniques with high spectral resolution spectroscopy to directly characterize exoplanets and provide key information such as chemical composition, temperature, and rotational velocity. A consequence of adaptive optics systems used in direct imaging is the formation of residual bright spots of star lights, called speckles, in the final image. Due to the large difference in brightness between host stars and their planets, these speckles can easily obscure potential exoplanets. In a previous demonstration, it was shown that using monochromatic light and a fiber injection unit (FIU), simulated exoplanet light can be directed to a high-resolution spectrograph. The method had speckle suppression that exceeding conventional image-based speckle nulling. With a previous Kalman filter estimator implementation, we found that with the implementation of the algorithm, speckle suppression was even more stable and outperformed traditional speckle nulling. In this update to the estimator, progress has been made in terms of a new filter design, and better estimates of the physical parameters in the laboratory, resulting in a higher speckle nulling performance.", "date": "2019-09-10", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171X", "id_number": "CaltechAUTHORS:20190912-132937281", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-132937281", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530756", "primary_object": { "basename": "111171X.pdf", "url": "https://authors.library.caltech.edu/records/2cdcv-z7f86/files/111171X.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Zhang, Manxuan; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/d236r-4v623", "eprint_id": 98616, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:44", "lastmod": "2024-01-14 21:56:40", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Coker-C-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. E." }, "orcid": "0000-0002-0863-6228" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" } ] }, "title": "A multi-object spectrograph using single-mode fibers with a coronagraph: progress towards laboratory results on the high-contrast testbed for segmented telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by the Universities Space Research Association under contract with NASA. Copyright 2019 California Institute of Technology. Government Sponsorship acknowledged. All rights reserved.\n\nPublished - 111171A.pdf
", "abstract": "Using single-mode fibers (SMFs) in the image plane of coronagraphs allows access to a new wavefront control regime. By using deformable mirrors to create a mismatch between the incoming starlight and the fiber mode, SMFs can serve as integral parts of the light suppression ability of the coronagraph. Previous promising simulation results show increased spectral bandwidth and throughput when using SMFs in a multi-object role, and previous laboratory results have shown increased light suppression using a single SMF. We present an update on efforts to combine a multi-core SMF with a high-resolution spectrograph on the High Contrast Testbed for Segmented Telescopes (HCST) at Caltech. We present our planned experimental design, as well as simulations of expected performance when controlling multiple fiber cores on HCST. We will test the potential increase in spectral bandpass and throughput resulting from the switch to SMFs, as well as the stability of the wavefront control solution.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171A", "id_number": "CaltechAUTHORS:20190912-134333478", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-134333478", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528569", "primary_object": { "basename": "111171A.pdf", "url": "https://authors.library.caltech.edu/records/d236r-4v623/files/111171A.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Coker, Carl T.; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6rhqy-28c40", "eprint_id": 98619, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:05", "lastmod": "2024-01-14 21:56:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "McEwen-E", "name": { "family": "McEwen", "given": "Eden" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Ragland-S", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "James" } } ] }, "title": "Demonstrating predictive wavefront control with the Keck II near-infrared pyramid wavefront sensor", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, Stars, Adaptive optics, Wavefronts, Turbulence, Coronagraphy, Point spread functions, Telescopes", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe predictive wavefront control demonstration is funded by the Heising-Simons Foundation. The authors would like to thank Marcos van Dam (Flat Wavefronts) for his suggestion to use the regularized least-squares inversion method to compute the predictive filter. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The PYWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391. Support for R. J. -C. was provided by the Miller Institute for Basic Research in the Sciences. This work benefited from the NASA Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by the NASA Science Mission Directorate. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 111170W.pdf
Accepted Version - 1909.05302.pdf
", "abstract": "The success of ground-based instruments for high contrast exoplanet imaging depends on the degree to which adaptive optics (AO) systems can mitigate atmospheric turbulence. While modern AO systems typically suffer from millisecond time lags between wavefront measurement and control, predictive wavefront control (pWFC) is a means of compensating for those time lags using previous wavefront measurements, thereby improving the raw contrast in the post-coronagraphic science focal plane. A method of predictive control based on Empirical Orthogonal Functions (EOF) has previously been proposed and demonstrated on Subaru/SCExAO. In this paper we present initial tests of this method for application to the near-infrared pyramid wavefront sensor (PYWFS) recently installed in the Keck II AO system. We demonstrate the expected root-mean-square (RMS) wavefront error and contrast benefits of pWFC based on simulations, applying pWFC to on-sky telemetry data saved during commissioning of the PYWFS. We discuss how the performance varies as different temporal and spatial scales are included in the computation of the predictive filter. We further describe the implementation of EOF pWFC within the PYWFS dedicated real-time controller (RTC), and, via daytime testing at the observatory, we demonstrate the performance of pWFC in real time when pre-computed phase screens are applied to the deformable mirror (DM).", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170W", "id_number": "CaltechAUTHORS:20190912-140620297", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-140620297", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Miller Institute for Basic Research in Science" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529687", "primary_object": { "basename": "111170W.pdf", "url": "https://authors.library.caltech.edu/records/6rhqy-28c40/files/111170W.pdf" }, "related_objects": [ { "basename": "1909.05302.pdf", "url": "https://authors.library.caltech.edu/records/6rhqy-28c40/files/1909.05302.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Jensen-Clem, Rebecca; Bond, Charlotte Z.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3b73d-sw626", "eprint_id": 98624, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:27", "lastmod": "2024-01-14 21:56:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Stern-D", "name": { "family": "Stern", "given": "Daniel" }, "orcid": "0000-0003-2686-9241" }, { "id": "Scowen-P-A", "name": { "family": "Scowen", "given": "Paul" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" } ] }, "title": "Habitable Exoplanet Observatory (HabEx) telescope and optical instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, Exoplanet, Starshade, Coronagraphy, Ultraviolet, Infrared, Spectroscopy, Imaging", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe information in this paper is provided prior to any decisions or commitments being made and is provided for planning and discussion purposes only. This work was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Copyright 2019 California Institute of Technology. Government sponsorship acknowledged. All rights reserved.\n\nPublished - 1111704.pdf
", "abstract": "The HabEx study has developed a baseline concept for a 4 m aperture next generation space telescope operating from the ultraviolet to the infrared, capable of compelling general astrophysics and exoplanet science. HabEx carries four instruments, a UV spectrometer/imager (UVS) together with a general purpose astrophysics camera/spectrograph (HWC) and for exoplanet work, a coronagraph and a starshade. UVS reaches down to 115 nm with resolution up to 60,000 and a 3'x3' field of view. HWC operates between 370 nm and 1800 nm, again with a 3'x3' field of view; the spectral resolution is 1000 and it carries a suite of science filters. The telescope is capable of tracking both deep space and solar system objects. The coronagraph enables observations and spectroscopy at up to R=140 with instantaneous 20% bandwidth between wavelengths of 450 and 1800 nm and is intended to be used in a survey mode. However, it also backs up most of the functionality of the accompanying starshade instrument which will have superior performance for spectroscopy. The 52 m diameter starshade flies 76,600 km from the telescope and at that range has a broadband suppression of the starlight between 300 and 1000 nm. A single observation at 108% bandwidth covers a very wide spectral band at a resolution up to 140. Both coronagraph and starshade are equipped with integral field spectrometers to enable simultaneous spectroscopy of exoplanets within the field of view. This paper details the design of the telescope, the four science instruments and associated optical systems.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111704", "id_number": "CaltechAUTHORS:20190913-070700442", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190913-070700442", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530737", "primary_object": { "basename": "1111704.pdf", "url": "https://authors.library.caltech.edu/records/3b73d-sw626/files/1111704.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Martin, Stefan; Kuan, Gary; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7k605-4wj20", "eprint_id": 98610, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:27", "lastmod": "2024-01-14 21:56:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Wallace-James-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Ragland-Sam", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Fitzgerald-Michael-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Calvin-Ben", "name": { "family": "Calvin", "given": "Ben" } }, { "id": "Millar-Blanchaer-Maxwell-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Martin-Emily-C", "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Wang-Eric", "name": { "family": "Wang", "given": "Eric" } }, { "id": "Jacobson-Shane-M", "name": { "family": "Jacobson", "given": "Shane" } }, { "id": "Warmbier-Eric-A", "name": { "family": "Warmbier", "given": "Eric" } }, { "id": "Lockhart-Charles", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Hall-Don-N-B", "name": { "family": "Hall", "given": "Don" } }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "McEwen-Eden", "name": { "family": "McEwen", "given": "Eden" } } ] }, "title": "Keck Planet Imager and Characterizer: demonstrating advanced exoplanet characterization techniques for future extremely large telescopes (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, high contrast imaging, exoplanets, high dispersion coronography, high resolution\nspectroscopy", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testbed. We would like to thank the SCExAO project for lending KPIC roof prisms for the NIR PyWFS. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nAccepted Version - 1909.04541.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system enabling high contrast imaging and high-resolution spectroscopic characterization of giant exoplanets in the mid-infrared (2-5 microns). The KPIC instrument will be developed in phases. Phase I entails the installation of an infrared pyramid wavefront sensor (PyWFS) based on a fast, low-noise SAPHIRA IR-APD array. The ultra-sensitive infrared PyWFS will enable high contrast studies of infant exoplanets around cool, red, and/or obscured targets in star forming regions. In addition, the light downstream of the PyWFS will be coupled into an array of single-mode fibers with the aid of an active fiber injection unit (FIU). In turn, these fibers route light to Keck's high-resolution infrared spectrograph NIRSPEC, so that high dispersion coronagraphy (HDC) can be implemented for the first time. HDC optimally pairs high contrast imaging and high-resolution spectroscopy allowing detailed characterization of exoplanet atmospheres, including molecular composition, spin measurements, and Doppler imaging. We will provide an overview of the instrument, its science scope, and report on recent results from on-sky commissioning of Phase I. We will discuss plans for optimizing the instrument to seed designs for similar modes on extremely large telescopes.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170T", "id_number": "CaltechAUTHORS:20190912-110942196", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-110942196", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529330", "primary_object": { "basename": "1909.04541.pdf", "url": "https://authors.library.caltech.edu/records/7k605-4wj20/files/1909.04541.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Jovanovic, Nemanja; Delorme, Jacques-Robert; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/q3gh5-tcx19", "eprint_id": 98625, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:52", "lastmod": "2024-01-14 21:56:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Saini-N-S", "name": { "family": "Saini", "given": "Navtej" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James" }, "orcid": "0000-0002-9488-098X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stahl-P", "name": { "family": "Stahl", "given": "Philip" } }, { "id": "Davis-J", "name": { "family": "Davis", "given": "Jeffrey" } } ] }, "title": "Numerical modeling of the Habex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "Habex, coronagraph", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was performed at the Jet Propulsion Laboratory/California Institute of Technology under contract to NASA. The decision to implement WFIRST will not be finalized until NASA's completion of the National Environmental Policy Act (NEPA) process. This document is being made available for information purposes only.\n\nPublished - 1111705.pdf
", "abstract": "The Habex study, commissioned by NASA in preparation for the 2020 Decadal Survey, is evaluating a 4 meter space telescope for high contrast imaging and spectral characterization of extrasolar terrestrial planets. Its off-axis configuration, active structural metrology, and low-disturbance pointing control provide an optimal system for coronagraphs. We present predictions of the Habex performance using a charge 6 vortex coronagraph that have been obtained using numerical modeling techniques developed for the WFIRST coronagraph. The models include realistic optical surface and polarization-induced aberrations, pointing jitter, and thermally-induced wavefront variations. Wavefront control using dual deformable mirrors is simulated to create a dark, high-contrast hole around the star. The results show that current technologies can closely approach the Habex performance goals, and with some additional development in key areas (e.g., deformable mirror surface quality, low-polarization coatings, etc.) over the next few years they should reliably meet them.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111705", "id_number": "CaltechAUTHORS:20190913-072409336", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190913-072409336", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530462", "primary_object": { "basename": "1111705.pdf", "url": "https://authors.library.caltech.edu/records/q3gh5-tcx19/files/1111705.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Krist, John; Martin, Stefan; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5w35b-b3793", "eprint_id": 98617, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:51", "lastmod": "2024-01-14 21:56:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Scalar vortex coronagraph mask design and predicted performance", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111171F.pdf
Accepted Version - 1908.09786.pdf
", "abstract": "Vortex coronagraphs are an attractive solution for imaging exoplanets with future space telescopes due to their relatively high throughput, large spectral bandwidth, and low sensitivity to low-order aberrations compared to other coronagraphs with similar inner working angles. Most of the vortex coronagraph mask development for space applications has focused on generating a polychromatic, vectorial, optical vortex using multiple layers of liquid crystal polymers. While this approach has been the most successful thus far, current fabrication processes achieve retardance errors of 0.1-1.0\u00b0, which causes a nonnegligible fraction of the starlight to leak through the coronagraph. Circular polarizers are typically used to reject the stellar leakage reducing the throughput by a factor of two. Vector vortex masks also complicate wavefront control because they imprint conjugated phase ramps on the orthogonal circular polarization components, which may need to be split in order to properly sense and suppress the starlight. Scalar vortex masks can potentially circumvent these limitations by applying the same phase shift to all incident light regardless of the polarization state and thus have the potential to significantly improve the performance of vortex coronagraphs. We present scalar vortex coronagraph designs that make use of focal plane masks with multiple layers of dielectrics that (a) produce phase patterns that are relatively friendly to standard manufacturing processes and (b) achieve sufficient broadband starlight suppression, in theory, for imaging Earth-like planets with future space telescopes.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171F", "id_number": "CaltechAUTHORS:20190912-135301575", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-135301575", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528625", "primary_object": { "basename": "111171F.pdf", "url": "https://authors.library.caltech.edu/records/5w35b-b3793/files/111171F.pdf" }, "related_objects": [ { "basename": "1908.09786.pdf", "url": "https://authors.library.caltech.edu/records/5w35b-b3793/files/1908.09786.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/t7393-rqr30", "eprint_id": 98618, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:58", "lastmod": "2024-01-14 21:56:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Wallace-James-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Colborn-Jennah-K", "name": { "family": "Colborn", "given": "Jennah K." } }, { "id": "Cetre-Sylvain", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Bartos-Randall-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "Calvin-Benjamin-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jensen-Clem-Rebecca-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "McEwen-Eden", "name": { "family": "McEwen", "given": "Eden" } }, { "id": "Lilley-Scott-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Wetherell-Edward", "name": { "family": "Wetherell", "given": "Ed" } }, { "id": "Wizinowich-Peter-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "Status of the Keck Planet Imager and Characterizer phase II development", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working angle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. We thank Dr. Rebecca Jensen-Clem for loaning AOSE for use within the KPIC phase II testbed. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111170U.pdf
Accepted Version - 1909.06487.pdf
", "abstract": "The Keck Planet Imager and Characterizer comprises of a series of upgrades to the Keck II adaptive optics system and instrument suite to improve the direct imaging and high resolution spectroscopy capabilities of the facility instruments NIRC2 and NIRSPEC, respectively. Phase I of KPIC includes a NIR pyramid wavefront sensor and a Fiber Injection Unit (FIU) to feed NIRSPEC with a single mode fiber, which have already been installed and are currently undergoing commissioning. KPIC will enable High Dispersion Coronagraphy (HDC) of directly imaged exoplanets for the first time, providing potentially improved detection significance and spectral characterization capabilities compared to direct imaging. In favorable cases, Doppler imaging, spin measurements, and molecule mapping are also possible. This science goal drives the development of phase II of KPIC, which is scheduled to be deployed in early 2020. Phase II optimizes the system throughput and contrast using a variety of additional submodules, including a 952 element deformable mirror, phase induced amplitude apodization lenses, an atmospheric dispersion compensator, multiple coronagraphs, a Zernike wavefront sensor, and multiple science ports. A testbed is being built in the Exoplanet Technology Lab at Caltech to characterize and test the design of each of these submodules before KPIC phase II is deployed to Keck. This paper presents an overview of the design of phase II and report on results from laboratory testing.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170U", "id_number": "CaltechAUTHORS:20190912-135826007", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-135826007", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2529685", "primary_object": { "basename": "111170U.pdf", "url": "https://authors.library.caltech.edu/records/t7393-rqr30/files/111170U.pdf" }, "related_objects": [ { "basename": "1909.06487.pdf", "url": "https://authors.library.caltech.edu/records/t7393-rqr30/files/1909.06487.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Pezzato, Jacklyn; Jovanovic, Nemanja; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jr92c-qhh72", "eprint_id": 98609, "eprint_status": "archive", "datestamp": "2023-08-19 17:46:22", "lastmod": "2024-01-14 21:56:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morgan-R-M", "name": { "family": "Morgan", "given": "Rhonda M." } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. P." } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Nikzad-S", "name": { "family": "Nikzad", "given": "Shouleh" } }, { "id": "Azizi-A", "name": { "family": "Azizi", "given": "Alireza" } }, { "id": "Balasubramanian-B", "name": { "family": "Balasubramanian", "given": "Bala" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Redding-D-C", "name": { "family": "Redding", "given": "David C." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Hennessy-J-J", "name": { "family": "Hennessy", "given": "John J." } }, { "id": "Warwick-S", "name": { "family": "Warwick", "given": "Steve" } } ] }, "title": "Technology maturity update for the Habitable-zone Exoplanet Imaging Observatory (HabEx) concept (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Since the 2010 Decadal Survey, the technologies needed for direct imaging of exoplanets advanced significantly. NASA investment in these technologies, prioritized in the 2010 Decadal Survey, have ripened to a maturity to enable direct imaging of earthlike exoplanets. For the first time since the discovery of exoplanets, a direct imaging mission can be conceived to start in less than ten years, possibly as soon as five years. The HabEx Observatory Concept design utilizes technologies that are state of the art or near to state of the art with clear paths of development. The philosophy of the design favors as high a Technology Readiness Level (TRL) as possible to minimize risk. We discuss the HabEx technology challenges and assess the TRL expected by the submission of the Final Report in 2019. Many of the enabling technologies are at, or expected to be at, TRL 5 by 2019, and the remaining technologies are at TRL 4. We update the technology maturity roadmap with technology advances in the past year and expand it to include an Architecture option which is a 3.2 m diameter on-axis segmented aperture with a starshade only. The starshade suppresses starlight before it enters the telescope, allowing the telescope optical performance and stability to be significantly looser than for a coronagraph, thus enabling a segmented primary mirror design that can meet stability requirements with minimal advancement from the state of the art. We assess the exoplanet-driven technologies of HabEx, including starshades, coronagraphs, deformable mirrors, wavefront control, 4 m aperture mirrors, jitter mitigation, segmented mirror stability, and low-noise detectors.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111150N", "id_number": "CaltechAUTHORS:20190912-105758259", "isbn": "9781510629233", "book_title": "UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-105758259", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. Philip" } } ] }, "doi": "10.1117/12.2529766", "resource_type": "book_section", "pub_year": "2019", "author_list": "Morgan, Rhonda M.; Warfield, Keith; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3eh0f-wvq92", "eprint_id": 98620, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:09", "lastmod": "2024-01-14 21:56:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop-Sayson", "given": "Jorge" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "Carl T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Morrissey-G", "name": { "family": "Morrissey", "given": "Grady" } }, { "id": "Sun-He", "name": { "family": "Sun", "given": "He" } } ] }, "title": "The high-contrast spectroscopy testbed for segmented telescopes (HCST): new wavefront control demonstrations", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Exoplanets, Wavefront Control, Wavefront Sensing, Spectroscopy", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was partially supported by the National Science Foundation AST-ATI Grant 1710210.\n\nPublished - 111171W.pdf
", "abstract": "The High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) in the Exoplanet Technology Laboratory (ET Lab) at Caltech is designed to test the technologies that will enable direct imaging and characterization of exoplanets with future segmented ground- and space-based telescopes. Wavefront sensing and control has been successfully implemented with electric field conjugation (EFC) using the FALCO Matlab package, yielding a baseline raw contrast of 1\u00d710^(-8) in narrowband light with a Vector Vortex Coronagraph over a clear aperture. Here we report on progress towards our next HCST milestones: 1- Demonstration of 10^(-8) raw contrast levels in broadband light with the apodized vortex coronagraph using a LUVOIR B-like segmented aperture. 2- Integration of a fiber injection unit (FIU) and corresponding wavefront control algorithm to achieve 10^(-8) raw contrast in broadband light through a single mode fiber enabling high dispersion coronagraphy.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111171W", "id_number": "CaltechAUTHORS:20190912-141317978", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-141317978", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710210" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2530670", "primary_object": { "basename": "111171W.pdf", "url": "https://authors.library.caltech.edu/records/3eh0f-wvq92/files/111171W.pdf" }, "resource_type": "book_section", "pub_year": "2019", "author_list": "Llop-Sayson, Jorge; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gd7fh-4t086", "eprint_id": 98621, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:16", "lastmod": "2024-01-14 21:56:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-Daniel", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-Garreth-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Hayama-Thomas", "name": { "family": "Hayama", "given": "Thomas" } }, { "id": "Delorme-Jacques-Robert", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Bond-Charlotte-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. Kent" }, "orcid": "0000-0001-5299-6899" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The vortex fiber nulling mode of the Keck Planet Imager and Characterizer (KPIC)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, exoplanets, nulling interferometry", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 111170V.pdf
Accepted Version - 1909.03538.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system that includes an active fiber injection unit (FIU) for efficiently routing light from exoplanets to NIRSPEC, a high-resolution spectrograph. Towards the end of 2019, we will add a suite of new coronagraph modes as well as a\nhigh-order deformable mirror. One of these modes, operating in K-band (2.2 \u00b5m), will be the first vortex fiber nuller to go on sky. Vortex Fiber Nulling (VFN) is a new interferometric method for suppressing starlight in order to spectroscopically characterize exoplanets at angular separations that are inaccessible with conventional coronagraph systems. A monochromatic starlight suppression of 6 x 10^(-5) in 635 nm laser light has already been demonstrated on a VFN testbed in the lab. A polychromatic experiment is now underway and coupling efficiencies of < 5 x 10^(-4) and ~5% have been demonstrated for the star and planet respectively in 10% bandwidth light. Here we describe those experiments, the new KPIC VFN mode, and the expected performance of this mode using realistic parameters determined from on-sky tests done during the KPIC commissioning.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 111170V", "id_number": "CaltechAUTHORS:20190912-141939947", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-141939947", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-Stuart-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528529", "primary_object": { "basename": "111170V.pdf", "url": "https://authors.library.caltech.edu/records/gd7fh-4t086/files/111170V.pdf" }, "related_objects": [ { "basename": "1909.03538.pdf", "url": "https://authors.library.caltech.edu/records/gd7fh-4t086/files/1909.03538.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Echeverri, Daniel; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5cpb4-njs34", "eprint_id": 98623, "eprint_status": "archive", "datestamp": "2023-08-19 17:47:23", "lastmod": "2024-01-14 21:56:54", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natasha" } } ] }, "title": "Vortex fiber nulling for exoplanet observations: conceptual design, theoretical performance, and initial scientific yield predictions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, exoplanets, interferometry", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.\n\nPublished - 1111716.pdf
Accepted Version - 1908.09780.pdf
", "abstract": "Vortex fiber nulling (VFN) is a method that may enable the detection and characterization of exoplanets at small angular separations (0.5-2 \u03bb/D) with ground- and space-based telescopes. Since the field of view is within the inner working angle of most coronagraphs, nulling accesses non-transiting planets that are otherwise too close to their star for spectral characterization by other means, thereby significantly increasing the number of known exoplanets available for direct spectroscopy in the near-infrared. Furthermore, VFN targets planets on closer-in orbits which tend to have more favorable planet-to-star flux ratios in reflected light. Here, we present the theory and applications of VFN, show that the optical performance is approximately equivalent for a variety of implementations and aperture shapes, and discuss the trade-offs between throughput and engineering requirements using numerical simulations. We compare vector and scalar approaches and, finally, show that beam shaping optics may be used to significantly improve the throughput for planet light. Based on theoretical performance, we estimate the number of known planets and theoretical exoEarths accessible with a VFN instrument linked to a high-resolution spectrograph on the future Thirty Meter Telescope.", "date": "2019-09-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1111716", "id_number": "CaltechAUTHORS:20190912-162000191", "isbn": "9781510629271", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190912-162000191", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.2528555", "primary_object": { "basename": "1111716.pdf", "url": "https://authors.library.caltech.edu/records/5cpb4-njs34/files/1111716.pdf" }, "related_objects": [ { "basename": "1908.09780.pdf", "url": "https://authors.library.caltech.edu/records/5cpb4-njs34/files/1908.09780.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Ruane, Garreth; Echeverri, Daniel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wh51d-qkv48", "eprint_id": 98513, "eprint_status": "archive", "datestamp": "2023-08-19 17:45:48", "lastmod": "2024-01-14 21:55:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Porter-M", "name": { "family": "Porter", "given": "Michael" } }, { "id": "Palatnick-S", "name": { "family": "Palatnick", "given": "Skyler" } }, { "id": "Hopkins-Connor", "name": { "family": "Hopkins", "given": "Connor" } } ] }, "title": "Achieving a spectropolarimetric precision better than 0.1% in the near-infrared with WIRC+Pol", "ispublished": "unpub", "full_text_status": "public", "keywords": "spectropolarimetry, polarization grating", "note": "\u00a9 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 1113209.pdf
Accepted Version - 1908.10409.pdf
", "abstract": "WIRC+Pol is a near-infrared low-resolution spectropolarimeter on the 200-inch Telescope at Palomar Observatory. The instrument utilizes a polarization grating to perform polarimetric beam splitting and spectral dispersion simultaneously. It can operate either with a focal plane slit to reduce sky background or in a slitless mode. Four different spectra sampling four linear polarization angles are recorded in the focal plane, allowing the instrument to measure all linear polarization states in one exposure. The instrument has been on-sky since February 2017 and we found that the systematic errors, likely arising from flat fielding and gravity effects on the instrument, limit our accuracy to ~1%. These systematic effects were slowly varying, and hence could be removed with a polarimetric modulator. A half-wave plate modulator and a linear polarizer were installed in front of WIRC+Pol in March 2019. The modulator worked as expected, allowing us to measure and remove all instrumental polarization we previously observed. The deepest integration on a bright point source (J = 7.689, unpolarized star HD65970) demonstrated uncertainties in q and u of 0.03% per spectral channel, consistent with the photon noise limit. Observations of fainter sources showed that the instrument could reach the photon noise limit for observations in the slitless mode. For observations in slit, the uncertainties were still a factor of few above the photon noise limit, likely due to slit loss.", "date": "2019-09-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1113209", "id_number": "CaltechAUTHORS:20190909-093503549", "isbn": "9781510629578", "book_title": "Polarization Science and Remote Sensing IX", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190909-093503549", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Craven-J-M", "name": { "family": "Craven", "given": "Julia M." } }, { "id": "Shaw-J-A", "name": { "family": "Shaw", "given": "Joseph A." } }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } } ] }, "doi": "10.1117/12.2529863", "primary_object": { "basename": "1113209.pdf", "url": "https://authors.library.caltech.edu/records/wh51d-qkv48/files/1113209.pdf" }, "related_objects": [ { "basename": "1908.10409.pdf", "url": "https://authors.library.caltech.edu/records/wh51d-qkv48/files/1908.10409.pdf" } ], "resource_type": "book_section", "pub_year": "2019", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nkem7-pef73", "eprint_id": 97323, "eprint_status": "archive", "datestamp": "2023-08-19 16:43:12", "lastmod": "2024-02-02 21:06:01", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Jontof-Hutter-D", "name": { "family": "Jontof-Hutter", "given": "Daniel" }, "orcid": "0000-0002-6227-7510" }, { "id": "Shporer-A", "name": { "family": "Shporer", "given": "Avi" }, "orcid": "0000-0002-1836-3120" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Liu-Leo-J", "name": { "family": "Liu", "given": "Leo" } }, { "id": "Thorngren-D-P", "name": { "family": "Thorngren", "given": "Daniel" }, "orcid": "0000-0002-5113-8558" }, { "id": "Lee-Eve-J", "name": { "family": "Lee", "given": "Eve J." }, "orcid": "0000-0002-1228-9820" }, { "id": "Chachan-Y", "name": { "family": "Chachan", "given": "Yayaati" }, "orcid": "0000-0003-1728-8269" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Wright-J-T", "name": { "family": "Wright", "given": "Jason" }, "orcid": "0000-0001-6160-5888" } ] }, "title": "Diffuser-Assisted Infrared Transit Photometry for Four Dynamically Kepler Systems", "ispublished": "unpub", "full_text_status": "public", "keywords": "techniques: photometric - planets and satellites: fundamental parameters - planets and\nsatellites: individual (Kepler-29b, Kepler-36c, KOI-1783.01, Kepler-177c)", "note": "The authors thank the entire Palomar Observatory staff for their tireless support of our work. We additionally acknowledge Jessie Christiansen for helpful discussions on KOI-1783, B. J. Fulton for assistance with the California Kepler Survey dataset, Erik Petigura for useful comments on time-correlated noise and joint RV-TTV modeling, Nicole Wallack for discussions on light curve fitting, and Gudmundur Stefansson for conversations regarding diffuser-assisted photometry at Palomar and other observatories. Support for this program was provided by NSF Career grant 1555095 and by NASA Origins grant NNH13ZDA001N-OSS. This work was partially supported by funding from the Center for Exoplanets and Habitable Worlds, which is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. \n\nFacilities: Hale (WIRC, PHARO), Kepler, OHP:1.52m (SOPHIE), PO:1.5m (ROBO-AO), Keck:II (NIRC2), ADS, Exoplanet Archive \n\nSoftware: photutils (Bradley et al. 2016), numpy (van der Walt et al. 2011), astropy (Astropy Collaboration et al. 2013, 2018), scipy (Jones et al. 2001), mat-plotlib (Hunter 2007), batman (Kreidberg 2015), em-cee (Foreman-Mackey et al. 2013), corner (Foreman-Mackey 2016), PyKE (Still & Barclay 2012), Aladin Lite (Bonnarel et al. 2000; Boch & Fernique 2014)\n\nSubmitted - 1907.04445.pdf
", "abstract": "We present ground-based infrared transit observations for four dynamically interacting Kepler planets, including Kepler-29b, Kepler-36c, KOI-1783.01, and Kepler-177c, obtained using the Wide-field Infrared Camera on the Hale 200\" telescope at Palomar Observatory. By utilizing an engineered diffuser and custom guiding software, we mitigate time-correlated telluric and instrumental noise sources in these observations. We achieve an infrared photometric precision comparable to or better than that of space-based observatories such as the Spitzer Space Telescope, and detect transits with greater than 5\u03c3 significance for all planets aside from Kepler-36c. For Kepler-177c (J=13.9) our measurement uncertainties are only 1.2\u00d7 the photon noise limit and 1.9 times better than the predicted photometric precision for Spitzer IRAC photometry of this same target. We find that a single transit observation obtained 4\u22125years after the end of the original \\textit{Kepler} mission can reduce dynamical mass uncertainties by as much as a factor of three for these systems. Additionally, we combine our new observations of KOI-1783.01 with information from the literature to confirm the planetary nature of this system. We discuss the implications of our new mass and radius constraints in the context of known exoplanets with low incident fluxes, and we note that Kepler-177c may be a more massive analog to the currently known super-puffs given its core mass (4.2\u00b10.8M\u2295) and large gas-to-core ratio (2.5\u00b10.2). Our demonstrated infrared photometric performance opens up new avenues for ground-based observations of transiting exoplanets previously thought to be restricted to space-based investigation.", "date": "2019-07-22", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190722-112021631", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190722-112021631", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1555095" }, { "agency": "NASA", "grant_number": "NNH13ZDA001N-OSS" }, { "agency": "Center for Exoplanets and Habitable Worlds" }, { "agency": "Pennsylvania State University" }, { "agency": "Eberly College of Science" }, { "agency": "Pennsylvania Space Grant Consortium" } ] }, "local_group": { "items": [ { "id": "TAPIR" }, { "id": "Walter-Burke-Institute-for-Theoretical-Physics" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.48550/arXiv.1907.04445", "primary_object": { "basename": "1907.04445.pdf", "url": "https://authors.library.caltech.edu/records/nkem7-pef73/files/1907.04445.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Vissapragada, Shreyas; Jontof-Hutter, Daniel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/b46ge-c7h36", "eprint_id": 97306, "eprint_status": "archive", "datestamp": "2023-08-19 16:48:00", "lastmod": "2024-01-14 21:50:25", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-Nemanja", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Dekany-Richard-G", "name": { "family": "Dekany", "given": "Richard" }, "orcid": "0000-0002-5884-7867" }, { "id": "Hover-David", "name": { "family": "Hover", "given": "David" } }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pezzato-Jacklyn", "name": { "family": "Pezzato", "given": "Jacklyn" } }, { "id": "Porter-Michael-D", "name": { "family": "Porter", "given": "Michael D." } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" } ] }, "title": "Enabling the next generation of scientific discoveries by embracing photonic technologies", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1907.07742.pdf
", "abstract": "The fields of Astronomy and Astrophysics are technology limited, where the advent and application of new technologies to astronomy usher in a flood of discoveries altering our understanding of the Universe (e.g., recent cases include LIGO and the GRAVITY instrument at the VLTI). Currently, the field of astronomical spectroscopy is rapidly approaching an impasse: the size and cost of instruments, especially multi-object and integral field spectrographs for extremely large telescopes (ELTs), are pushing the limits of what is feasible, requiring optical components at the very edge of achievable size and performance. For these reasons, astronomers are increasingly looking for innovative solutions like photonic technologies that promote instrument miniaturization and simplification, while providing superior performance. \nAstronomers have long been aware of the potential of photonic technologies. The goal of this white paper is to draw attention to key photonic technologies and developments over the past two decades and demonstrate there is new momentum in this arena. We outline where the most critical efforts should be focused over the coming decade in order to move towards realizing a fully photonic instrument. A relatively small investment in this technology will advance astronomical photonics to a level where it can reliably be used to solve challenging instrument design limitations. For the benefit of both ground and space borne instruments alike, an endorsement from the National Academy of Sciences decadal survey will ensure that such solutions are set on a path to their full scientific exploitation, which may one day address a broad range of science cases outlined in the KSPs.", "date": "2019-07-22", "date_type": "published", "id_number": "CaltechAUTHORS:20190722-082241649", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190722-082241649", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1907.07742", "primary_object": { "basename": "1907.07742.pdf", "url": "https://authors.library.caltech.edu/records/b46ge-c7h36/files/1907.07742.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Jovanovic, Nemanja; Beichman, Charles; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4zwc2-ea298", "eprint_id": 96396, "eprint_status": "archive", "datestamp": "2023-08-19 16:44:23", "lastmod": "2023-10-20 21:08:15", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Casassus-S", "name": { "family": "Casassus", "given": "S." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Cantalloube-F", "name": { "family": "Cantalloube", "given": "F." } }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C." }, "orcid": "0000-0003-2050-1710" }, { "id": "Girard-J", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Ram\u00edrez-R", "name": { "family": "Ram\u00edrez", "given": "R." } }, { "id": "Pairet-B", "name": { "family": "Pairet", "given": "B." } }, { "id": "Salinas-V-N", "name": { "family": "Salinas", "given": "V." } }, { "id": "Price-D-J", "name": { "family": "Price", "given": "D. J." }, "orcid": "0000-0002-4716-4235" }, { "id": "Pinte-C", "name": { "family": "Pinte", "given": "C." }, "orcid": "0000-0001-5907-5179" }, { "id": "Quanz-S-P", "name": { "family": "Quanz", "given": "S. P." }, "orcid": "0000-0003-3829-7412" }, { "id": "Jord\u00e1n-Andr\u00e9s", "name": { "family": "Jord\u00e1n", "given": "A." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" } ] }, "title": "Separating extended disc features from the protoplanet in PDS\u00a070 using VLT/SINFONI", "ispublished": "pub", "full_text_status": "public", "keywords": "techniques: image processing, planet\u2013disc interactions, protoplanetary discs, stars: individual: PDS 70", "note": "\u00a9 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) \n\nAccepted 2019 April 29. Received 2019 April 11; in original form 2019 February 20. \n\nVC is thankful to Sebastian Perez, Miriam Keppler, and Roy van Boekel for constructive discussions. VC also acknowledges Zachary Long and Mike Sitko for sharing their SpeX spectrum of PDS 70, and Alexander Heger for the use of Oxygen. VC and SC acknowledge support from the Millennium Science Initiative (Chilean Ministry of Economy) through grant RC130007. VC and OA acknowledge funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569). We also acknowledge funding from the Australian Research Council via DP180104235. This work was supported by the Multi-modal Australian ScienceS Imaging and Visualisation Environment (MASSIVE) (www.massive.org.au).\n\nPublished - stz1232.pdf
Accepted Version - 1905.01860.pdf
", "abstract": "Transition discs are prime targets to look for protoplanets and study planet\u2013disc interactions. We present VLT/SINFONI observations of PDS 70, a transition disc with a recently claimed embedded protoplanet. We take advantage of the angular and spectral diversity present in our data for an optimal PSF modelling and subtraction using principal component analysis (PCA). We report the redetection of PDS 70 b, both the front and far side of the outer disc edge, and the detection of several extended features in the annular gap. We compare spectral differential imaging applied before (PCA-SADI), and after (PCA-ASDI) angular differential imaging. Our tests suggest that PCA-SADI better recovers extended features, while PCA-ASDI is more sensitive to point sources. We adapted the negative fake companion (NEGFC) technique to infer the astrometry of the companion, and derived r = 193.5 \u00b1 4.9 mas and PA =158.7\u00b0 \u00b1 3.0\u00b0. We used both NEGFC and ANDROMEDA to infer the K-band spectro-photometry of the protoplanet, and found results consistent with recent VLT/SPHERE observations, except for their 2018/02 epoch measurement in the K2 filter. Finally, we derived an upper limit of \u1e40b < 1.26 \u00d7 10^(\u22127) [5M_(Jup)/M_b][R_b/R_(Jup)]M_(Jup) yr^(\u22121) for the accretion rate of the companion based on an adaptation of PCA-SADI/PCA-ASDI around the Br\u03b3 line (assuming no extinction).", "date": "2019-07-11", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "486", "number": "4", "publisher": "Royal Astronomical Society", "pagerange": "5819-5837", "id_number": "CaltechAUTHORS:20190613-142206913", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190613-142206913", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Iniciativa Cient\u00edfica Milenio", "grant_number": "RC130007" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Australian Research Council", "grant_number": "DP180104235" }, { "agency": "Multi-modal Australian ScienceS Imaging and Visualisation Environment (MASSIVE)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1093/mnras/stz1232", "primary_object": { "basename": "1905.01860.pdf", "url": "https://authors.library.caltech.edu/records/4zwc2-ea298/files/1905.01860.pdf" }, "related_objects": [ { "basename": "stz1232.pdf", "url": "https://authors.library.caltech.edu/records/4zwc2-ea298/files/stz1232.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Christiaens, V.; Casassus, S.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wm4dc-10288", "eprint_id": 96616, "eprint_status": "archive", "datestamp": "2023-08-19 16:13:29", "lastmod": "2024-01-14 21:48:43", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Debes-J-H", "name": { "family": "Debes", "given": "John H." }, "orcid": "0000-0002-1783-8817" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Faramaz-V-C", "name": { "family": "Faramaz", "given": "Virginie C." } }, { "id": "Duch\u00eane-G", "name": { "family": "Duch\u00eane", "given": "Gaspard" } }, { "id": "Hines-D-C", "name": { "family": "Hines", "given": "Dean" }, "orcid": "0000-0003-4653-6161" }, { "id": "Stark-C", "name": { "family": "Stark", "given": "Chris" } }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Moro-Mart\u00edn-A", "name": { "family": "Moro-Mart\u00edn", "given": "Amaya" }, "orcid": "0000-0001-9504-8426" }, { "id": "Arriaga-P", "name": { "family": "Arriaga", "given": "Pauline" } }, { "id": "Chen-Christine", "name": { "family": "Chen", "given": "Christine" } }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Dodson-Robinson-S", "name": { "family": "Dodson-Robinson", "given": "Sally" } }, { "id": "Douglas-E-S", "name": { "family": "Douglas", "given": "Ewan S." } }, { "id": "Kalas-P", "name": { "family": "Kalas", "given": "Paul" }, "orcid": "0000-0002-6221-5360" }, { "id": "Lisse-C-M", "name": { "family": "Lisse", "given": "Carey M." }, "orcid": "0000-0002-9548-1526" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Max A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Sivramakrishnan-A", "name": { "family": "Sivramakrishnan", "given": "Anand" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" } ] }, "title": "Cold Debris Disks as Strategic Targets for the 2020s", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1906.02129.pdf
", "abstract": "Cold debris disks (T<200 K) are analogues to the dust in the Solar System's Kuiper belt--dust generated from the evaporation and collision of minor bodies perturbed by planets, our Sun, and the local interstellar medium. Scattered light from debris disks acts as both a signpost for unseen planets as well as a source of contamination for directly imaging terrestrial planets, but many details of these disks are poorly understood. We lay out a critical observational path for the study of nearby debris disks that focuses on defining an empirical relationship between scattered light and thermal emission from a disk, probing the dynamics and properties of debris disks, and directly determining the influence of planets on disks. \nWe endorse the findings and recommendations published in the National Academy reports on Exoplanet Science Strategy and Astrobiology Strategy for the Search for Life in the Universe. This white paper extends and complements the material presented therein with a focus on debris disks around nearby stars. Separate complementary papers are being submitted regarding the inner warm regions of debris disks (Mennesson et al.), the modeling of debris disk evolution (Gaspar et al.), studies of dust properties (Chen et al.), and thermal emission from disks (Su et al.).", "date": "2019-06-21", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190621-081621109", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190621-081621109", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1906.02129", "primary_object": { "basename": "1906.02129.pdf", "url": "https://authors.library.caltech.edu/records/wm4dc-10288/files/1906.02129.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Debes, John H.; Choquet, \u00c9lodie; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6acr1-why17", "eprint_id": 96610, "eprint_status": "archive", "datestamp": "2023-08-19 15:50:20", "lastmod": "2024-02-02 21:12:00", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "B." } }, { "name": { "family": "Artigau", "given": "\u00c9." } }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "V." }, "orcid": "0000-0002-5407-2806" }, { "name": { "family": "Baranec", "given": "C." } }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" }, { "name": { "family": "Benneke", "given": "B." } }, { "name": { "family": "Birkby", "given": "J." } }, { "name": { "family": "Brandt", "given": "T." } }, { "name": { "family": "Chilcote", "given": "J." } }, { "name": { "family": "Chun", "given": "M." } }, { "name": { "family": "Close", "given": "L." } }, { "name": { "family": "Currie", "given": "T." } }, { "name": { "family": "Crossfield", "given": "I." } }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "name": { "family": "Dong", "given": "C." } }, { "name": { "family": "Dong", "given": "R." } }, { "name": { "family": "Doyon", "given": "R." } }, { "name": { "family": "Dressing", "given": "C." } }, { "name": { "family": "Fitzgerald", "given": "M." } }, { "name": { "family": "Fortney", "given": "J." } }, { "name": { "family": "Frazin", "given": "R." } }, { "name": { "family": "Gaidos", "given": "E." } }, { "name": { "family": "Guyon", "given": "O." } }, { "name": { "family": "Hashimoto", "given": "J." } }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "L." } }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "A." }, "orcid": "0000-0001-8638-0320" }, { "name": { "family": "Jensen-Clem", "given": "R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "name": { "family": "Kotani", "given": "T." } }, { "name": { "family": "Kawahara", "given": "H." } }, { "name": { "family": "Konopacky", "given": "Q." } }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "H." }, "orcid": "0000-0002-5375-4725" }, { "name": { "family": "Liu", "given": "M." } }, { "name": { "family": "Lu", "given": "J." } }, { "name": { "family": "Lozi", "given": "J." } }, { "name": { "family": "Macintosh", "given": "B." } }, { "name": { "family": "Males", "given": "J." } }, { "name": { "family": "Marley", "given": "M." } }, { "name": { "family": "Marois", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Meeker-S-R", "name": { "family": "Meeker", "given": "S." } }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "M." }, "orcid": "0000-0001-6205-9233" }, { "name": { "family": "Mondal", "given": "S." } }, { "name": { "family": "Bose", "given": "S. N." } }, { "name": { "family": "Murakami", "given": "N." } }, { "name": { "family": "Murray-Clay", "given": "R." } }, { "name": { "family": "Narita", "given": "N." } }, { "name": { "family": "Pyo", "given": "T. S." } }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "L." }, "orcid": "0000-0003-3892-2900" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-G", "name": { "family": "Serabyn", "given": "G." } }, { "name": { "family": "Shields", "given": "A." } }, { "name": { "family": "Skemer", "given": "A." } }, { "name": { "family": "Simard", "given": "L." } }, { "name": { "family": "Stelter", "given": "D." } }, { "name": { "family": "Tamura", "given": "M." } }, { "id": "Troy-M", "name": { "family": "Troy", "given": "M." } }, { "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Wallace-J-Kent", "name": { "family": "Wallace", "given": "J. K." } }, { "name": { "family": "Wang", "given": "J." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "name": { "family": "Wright", "given": "S." } } ] }, "title": "Directly Imaging Rocky Planets from the Ground", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1905.04275.pdf
", "abstract": "Over the past three decades instruments on the ground and in space have discovered thousands of planets outside the solar system. These observations have given rise to an astonishingly detailed picture of the demographics of short-period planets, but are incomplete at longer periods where both the sensitivity of transit surveys and radial velocity signals plummet. Even more glaring is that the spectra of planets discovered with these indirect methods are either inaccessible (radial velocity detections) or only available for a small subclass of transiting planets with thick, clear atmospheres. Direct detection can be used to discover and characterize the atmospheres of planets at intermediate and wide separations, including non-transiting exoplanets. Today, a small number of exoplanets have been directly imaged, but they represent only a rare class of young, self-luminous super-Jovian-mass objects orbiting tens to hundreds of AU from their host stars. Atmospheric characterization of planets in the <5 AU regime, where radial velocity (RV) surveys have revealed an abundance of other worlds, is technically feasible with 30-m class apertures in combination with an advanced AO system, coronagraph, and suite of spectrometers and imagers. There is a vast range of unexplored science accessible through astrometry, photometry, and spectroscopy of rocky planets, ice giants, and gas giants. In this white paper we will focus on one of the most ambitious science goals --- detecting for the first time habitable-zone rocky (<1.6 R_Earth) exoplanets in reflected light around nearby M-dwarfs", "date": "2019-06-20", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190620-155138416", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190620-155138416", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.48550/arXiv.1905.04275", "primary_object": { "basename": "1905.04275.pdf", "url": "https://authors.library.caltech.edu/records/6acr1-why17/files/1905.04275.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Mazin, B.; Artigau, \u00c9.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/w6d36-arp84", "eprint_id": 96559, "eprint_status": "archive", "datestamp": "2023-08-19 14:53:23", "lastmod": "2024-01-14 21:48:25", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "McGehee-Peregrine-M", "name": { "family": "McGehee", "given": "Peregrine" }, "orcid": "0000-0003-0948-6716" }, { "id": "Boss-Alan-P", "name": { "family": "Boss", "given": "Alan" } }, { "id": "Close-Laird-M", "name": { "family": "Close", "given": "Laird" }, "orcid": "0000-0002-2167-8246" }, { "id": "Dodson-Robinson-Sarah-E", "name": { "family": "Dodson-Robinson", "given": "Sarah" }, "orcid": "0000-0002-8796-4974" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Szentgyorgyi-Andrew-H", "name": { "family": "Szentgyorgyi", "given": "Andrew" }, "orcid": "0000-0002-0255-2525" } ] }, "title": "Dynamical Processes in the Planet-Forming Environment", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.06136.pdf
", "abstract": "The transfer of circumstellar disk mass and momentum onto the protostar and out into the environment occurs via a variety of mechanisms including magnetospheric accretion, jets, outflows, and disk winds. The interplay of these processes determine both the conditions under which planet formation occurs and the lifetime of the disk. Metallic emission lines, along with the Balmer series of hydrogen, probe the kinematics of gas within the planet-forming and central regions of circumstellar disks. High-spectral resolution study of these emission lines provides critical information on mass and momentum loss, turbulence, and disk wind origins.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-104216009", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-104216009", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.06136", "primary_object": { "basename": "1903.06136.pdf", "url": "https://authors.library.caltech.edu/records/w6d36-arp84/files/1903.06136.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "McGehee, Peregrine; Boss, Alan; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4zp4w-5b844", "eprint_id": 96561, "eprint_status": "archive", "datestamp": "2023-08-19 15:01:41", "lastmod": "2024-01-14 21:48:27", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Marley-M-S", "name": { "family": "Marley", "given": "Mark" }, "orcid": "0000-0002-5251-2943" }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole" }, "orcid": "0000-0002-8507-1304" }, { "name": { "family": "Arney", "given": "Giada" } }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "Vanessa" }, "orcid": "0000-0002-5407-2806" }, { "name": { "family": "Batalha", "given": "Natasha" } }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "name": { "family": "Benneke", "given": "Bj\u00f6rn" } }, { "name": { "family": "Blecic", "given": "Jasmina" } }, { "name": { "family": "Cahoy", "given": "Kerri" } }, { "name": { "family": "Chilcote", "given": "Jeffrey" } }, { "name": { "family": "Domagal-Goldman", "given": "Shawn" } }, { "name": { "family": "Dressing", "given": "Courtney" } }, { "name": { "family": "Fitzgerald", "given": "Michael" } }, { "name": { "family": "Fortney", "given": "Jonathan" } }, { "name": { "family": "Freedman", "given": "Richard" } }, { "name": { "family": "Gelino", "given": "Dawn" } }, { "name": { "family": "Gizis", "given": "John" } }, { "name": { "family": "Guyon", "given": "Olivier" } }, { "name": { "family": "Greene", "given": "Thomas" } }, { "name": { "family": "Hammel", "given": "Heidi" } }, { "name": { "family": "Hasegawa", "given": "Yasuhiro" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "name": { "family": "Konopacky", "given": "Quinn" } }, { "name": { "family": "Kopparapu", "given": "Ravi" } }, { "name": { "family": "Liu", "given": "Michael" } }, { "name": { "family": "Lopez", "given": "Eric" } }, { "name": { "family": "Lunine", "given": "Jonathan" } }, { "name": { "family": "Lupu", "given": "Roxana" } }, { "name": { "family": "Macintosh", "given": "Bruce" } }, { "name": { "family": "Mandt", "given": "Kathleen" } }, { "name": { "family": "Marois", "given": "Christian" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Mayorga", "given": "Laura" } }, { "name": { "family": "Morley", "given": "Caroline" } }, { "name": { "family": "Nielsen", "given": "Eric" } }, { "name": { "family": "Roberge", "given": "Aki" } }, { "name": { "family": "Serabyn", "given": "Eugene" } }, { "name": { "family": "Skemer", "given": "Andrew" } }, { "name": { "family": "Stapelfeldt", "given": "Karl" } }, { "name": { "family": "Visscher", "given": "Channon" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" } ] }, "title": "Imaging Cool Giant Planets in Reflected Light: Science Investigations and Synergy with Habitable Planets", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.09322.pdf
", "abstract": "Planned astronomical observatories of the 2020s will be capable of obtaining reflected light photometry and spectroscopy of cool extrasolar giant planets. Here we explain that such data are valuable both for understanding the origin and evolution of giant planets as a whole and for preparing for the interpretation of similar datasets from potentially habitable extrasolar terrestrial planets in the decades to follow.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-110958838", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-110958838", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.09322", "primary_object": { "basename": "1903.09322.pdf", "url": "https://authors.library.caltech.edu/records/4zp4w-5b844/files/1903.09322.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Marley, Mark; Lewis, Nikole; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ek2kh-tb789", "eprint_id": 96515, "eprint_status": "archive", "datestamp": "2023-08-19 14:52:19", "lastmod": "2024-01-14 21:48:13", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sallum-S", "name": { "family": "Sallum", "given": "Steph" } }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "Vanessa P." }, "orcid": "0000-0002-5407-2806" }, { "id": "Bernstein-R-A", "name": { "family": "Bernstein", "given": "Rebecca A." } }, { "id": "Boss-A-P", "name": { "family": "Boss", "given": "Alan P." } }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird" }, "orcid": "0000-0002-2167-8246" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Dong-Ruobing", "name": { "family": "Dong", "given": "Ruobing" }, "orcid": "0000-0001-9290-7846" }, { "id": "Espaillat-C-C", "name": { "family": "Espaillat", "given": "Catherine" }, "orcid": "0000-0001-9227-5949" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Follette-K-B", "name": { "family": "Follette", "given": "Katherine B." } }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "Jonathan" }, "orcid": "0000-0002-9843-4354" }, { "id": "Hasegawa-Yasuhiro", "name": { "family": "Hasegawa", "given": "Yasuhiro" }, "orcid": "0000-0002-9017-3663" }, { "id": "Jang-Condell-H", "name": { "family": "Jang-Condell", "given": "Hannah" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Kane-S-R", "name": { "family": "Kane", "given": "Stephen R." }, "orcid": "0000-0002-7084-0529" }, { "id": "Konopacky-Q-M", "name": { "family": "Konopacky", "given": "Quinn" }, "orcid": "0000-0002-9936-6285" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael" }, "orcid": "0000-0003-2232-7664" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Max" }, "orcid": "0000-0001-6205-9233" }, { "id": "Murray-Clay-R-A", "name": { "family": "Murray-Clay", "given": "Ruth" }, "orcid": "0000-0001-5061-0462" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andrew" }, "orcid": "0000-0001-6098-3924" }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "Imaging Giant Protoplanets with the ELTs", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.05319.pdf
", "abstract": "We have now accumulated a wealth of observations of the planet-formation environment and of mature planetary systems. These data allow us to test and refine theories of gas-giant planet formation by placing constraints on the conditions and timescale of this process. Yet a number of fundamental questions remain unanswered about how protoplanets accumulate material, their photospheric properties and compositions, and how they interact with protoplanetary disks. While we have begun to detect protoplanet candidates during the last several years, we are presently only sensitive to the widest separation, highest mass / accretion rate cases. Current observing facilities lack the angular resolution and inner working angle to probe the few-AU orbital separations where giant planet formation is thought to be most efficient. They also lack the contrast to detect accretion rates that would form lower mass gas giants and ice giants. Instruments and telescopes coming online over the next decade will provide high contrast in the inner giant-planet-forming regions around young stars, allowing us to build a protoplanet census and to characterize planet formation in detail for the first time.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-084158876", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-084158876", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.05319", "primary_object": { "basename": "1903.05319.pdf", "url": "https://authors.library.caltech.edu/records/ek2kh-tb789/files/1903.05319.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Sallum, Steph; Bailey, Vanessa P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kvgkr-z2r24", "eprint_id": 96569, "eprint_status": "archive", "datestamp": "2023-08-19 14:57:53", "lastmod": "2024-01-14 21:48:31", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bhattacharya-A", "name": { "family": "Bhattacharya", "given": "Aparna" } }, { "id": "Akeson-R-L", "name": { "family": "Akeson", "given": "Rachel" }, "orcid": "0000-0001-9674-1564" }, { "name": { "family": "Anderson", "given": "Jay" } }, { "name": { "family": "Bachelet", "given": "Etienne" } }, { "name": { "family": "Beaulieu", "given": "Jean-Phillipe" } }, { "name": { "family": "Bellini", "given": "Andrea" } }, { "name": { "family": "Bennett", "given": "David P." } }, { "name": { "family": "Boss", "given": "Alan" } }, { "name": { "family": "Bozza", "given": "Valerio" } }, { "name": { "family": "Bryden", "given": "Geoffrey" } }, { "name": { "family": "Cassan", "given": "Arnaud" } }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David R." }, "orcid": "0000-0002-5741-3047" }, { "name": { "family": "Dominik", "given": "Martin" } }, { "name": { "family": "Fukui", "given": "Akihiko" } }, { "name": { "family": "Gaudi", "given": "B. Scott" } }, { "id": "Henderson-C-B", "name": { "family": "Henderson", "given": "Calen B." }, "orcid": "0000-0001-8877-9060" }, { "name": { "family": "Jacklin", "given": "Savannah" } }, { "name": { "family": "Johnson", "given": "Samson A." } }, { "name": { "family": "Koshimoto", "given": "Naoki" } }, { "name": { "family": "Mao", "given": "Shude" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Ngo", "given": "Henry" } }, { "name": { "family": "Penny", "given": "Matthew T." } }, { "name": { "family": "Poleski", "given": "Radoslaw" } }, { "name": { "family": "Ranc", "given": "Cl\u00e9ment" } }, { "name": { "family": "Dodgson-Robinson", "given": "Sarah" } }, { "name": { "family": "Rogers", "given": "Leslie A." } }, { "name": { "family": "Sahu", "given": "Kailash C." } }, { "name": { "family": "Seager", "given": "Sara" } }, { "name": { "family": "Street", "given": "R. A." } }, { "name": { "family": "Suzuki", "given": "Daisuke" } }, { "name": { "family": "Szulagyi", "given": "Judit" } }, { "name": { "family": "Tsapras", "given": "Yiannis" } }, { "name": { "family": "Udalski", "given": "Andrzej" } }, { "name": { "family": "Yock", "given": "Philip" } }, { "name": { "family": "Zimmerman", "given": "Neil" } } ] }, "title": "Masses and Distances of Planetary Microlens Systems with High Angular Resolution Imaging", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.08185.pdf
", "abstract": "Microlensing is the only method that can detect and measure mass of wide orbit, low mass, solar system analog exoplanets. Mass measurements of such planets would yield massive science on planet formation, exoplanet demographics, free floating planets, planet frequencies towards the galaxy. High res follow-up observations of past microlens targets provide a mass measurement of microlens planets and hosts at an uncertainty of <20%. This will be primary method for mass measurement with WFIRST. We advocate for the fact that high resolution observations with AO, HST and JWST(in future) remain necessary in coming decade to develop the methods, to determine the field and filter selection, understand the systematics and to develop a robust pipeline to release high quality data products from WFIRST microlensing survey such that the astronomy community can promptly engage in the science. We also support future high res obs with US ELTs with advanced Laser AO systems in context of enhancing the science return of WFIRST microlensing survey. \nWe endorse the 2018 Exoplanet Science Strategy report published by the National Academy. This white paper extends and complements the material presented therein. In particular, this white paper supports the recommendation of the National Academy Exoplanet Science Strategy report that: NASA should launch WFIRST to conduct its microlensing survey of distant planets and to demonstrate the technique of coronagraphic spectroscopy on exoplanet targets. This white paper also supports to the finding from that report which states \"A number of activities, including precursor and concurrent observations using ground- and space-based facilities, would optimize the scientific yield of the WFIRST microlensing survey.\"", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-134731951", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-134731951", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.08185", "primary_object": { "basename": "1903.08185.pdf", "url": "https://authors.library.caltech.edu/records/kvgkr-z2r24/files/1903.08185.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Bhattacharya, Aparna; Akeson, Rachel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k04mq-nsv16", "eprint_id": 96558, "eprint_status": "archive", "datestamp": "2023-08-19 14:57:07", "lastmod": "2024-01-14 21:48:23", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Meyer-M-R", "name": { "family": "Meyer", "given": "Michael R." }, "orcid": "0000-0003-1227-3084" }, { "id": "Boss-A-P", "name": { "family": "Boss", "given": "Alan" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird" }, "orcid": "0000-0002-2167-8246" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Dragomir-D", "name": { "family": "Dragomir", "given": "Diana" }, "orcid": "0000-0003-2313-467X" }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "Jonathan" }, "orcid": "0000-0002-9843-4354" }, { "id": "Gaidos-E-J", "name": { "family": "Gaidos", "given": "Eric" }, "orcid": "0000-0002-5258-6846" }, { "id": "Hasegawa-Yasuhiro", "name": { "family": "Hasegawa", "given": "Yasuhiro" }, "orcid": "0000-0002-9017-3663" }, { "id": "Kitiashvili-I", "name": { "family": "Kitiashvili", "given": "Irina" }, "orcid": "0000-0003-4144-2270" }, { "id": "Konopacky-Q", "name": { "family": "Konopacky", "given": "Quinn" }, "orcid": "0000-0002-9936-6285" }, { "id": "Lee-Chien-Hsiu", "name": { "family": "Lee", "given": "Chien-Hsiu" }, "orcid": "0000-0003-1700-5740" }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole K." }, "orcid": "0000-0002-8507-1304" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael" }, "orcid": "0000-0003-2232-7664" }, { "id": "Lupu-R-E", "name": { "family": "Lupu", "given": "Roxana" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Melis-C", "name": { "family": "Melis", "given": "Carl" }, "orcid": "0000-0001-9834-7579" }, { "id": "L\u00f3pez-Morales-M", "name": { "family": "L\u00f3pez-Morales", "given": "Mercedes" }, "orcid": "0000-0003-3204-8183" }, { "id": "Morley-C-V", "name": { "family": "Morley", "given": "Caroline V." }, "orcid": "0000-0002-4404-0456" }, { "id": "Packham-C", "name": { "family": "Packham", "given": "Chris" }, "orcid": "0000-0001-7827-5758" }, { "id": "Peretz-E", "name": { "family": "Peretz", "given": "Eliad" } }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Ulmer-M", "name": { "family": "Ulmer", "given": "Mel" } } ] }, "title": "New Frontiers for Terrestrial-sized to Neptune-sized Exoplanets In the Era of Extremely Large Telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.07556.pdf
", "abstract": "Surveys reveal that terrestrial- to Neptune-sized planets (1", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-103543348", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-103543348", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.07556", "primary_object": { "basename": "1903.07556.pdf", "url": "https://authors.library.caltech.edu/records/k04mq-nsv16/files/1903.07556.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Wang, Ji; Meyer, Michael R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0dzps-xyx46", "eprint_id": 96556, "eprint_status": "archive", "datestamp": "2023-08-19 14:49:58", "lastmod": "2024-01-14 21:48:21", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lyra-W", "name": { "family": "Lyra", "given": "Wladimir" }, "orcid": "0000-0002-3768-7542" }, { "name": { "family": "Haworth", "given": "Thomas" } }, { "name": { "family": "Bitsch", "given": "Bertram" } }, { "name": { "family": "Casassus", "given": "Simon" } }, { "name": { "family": "Cuello", "given": "Nicol\u00e1s" } }, { "name": { "family": "Currie", "given": "Thayne" } }, { "name": { "family": "G\u00e1sp\u00e1r", "given": "Andras" } }, { "name": { "family": "Jang-Condell", "given": "Hannah" } }, { "name": { "family": "Klahr", "given": "Hubert" } }, { "name": { "family": "Leigh", "given": "Nathan" } }, { "name": { "family": "Lodato", "given": "Giuseppe" } }, { "name": { "family": "Mac Low", "given": "Mordecai-Mark" } }, { "name": { "family": "Maddison", "given": "Sarah" } }, { "name": { "family": "Mamatsashvili", "given": "George" } }, { "name": { "family": "McNally", "given": "Colin" } }, { "name": { "family": "Isella", "given": "Andrea" } }, { "name": { "family": "P\u00e9rez", "given": "Sebasti\u00e1n" } }, { "name": { "family": "Ricci", "given": "Luca" } }, { "name": { "family": "Sengupta", "given": "Debanjan" } }, { "name": { "family": "Stamatellos", "given": "Dimitris" } }, { "name": { "family": "Szul\u00e1gyi", "given": "Judit" } }, { "name": { "family": "Teague", "given": "Richard" } }, { "name": { "family": "Turner", "given": "Neal" } }, { "name": { "family": "Umurhan", "given": "Orkan" } }, { "name": { "family": "White", "given": "Jacob" } }, { "name": { "family": "Wootten", "given": "Al" } }, { "name": { "family": "Alarcon", "given": "Felipe" } }, { "name": { "family": "Apai", "given": "Daniel" } }, { "name": { "family": "Bayo", "given": "Amelia" } }, { "name": { "family": "Bergin", "given": "Edwin" } }, { "name": { "family": "Carrera", "given": "Daniel" } }, { "name": { "family": "Cleeves", "given": "Ilse" } }, { "name": { "family": "Cooray", "given": "Asantha" } }, { "name": { "family": "Golabek", "given": "Gregor" } }, { "name": { "family": "Gressel", "given": "Oliver" } }, { "name": { "family": "Gurwell", "given": "Mark" } }, { "name": { "family": "Krijt", "given": "Sebastiaan" } }, { "name": { "family": "Hall", "given": "Cassandra" } }, { "name": { "family": "Dong", "given": "Ruobing" } }, { "name": { "family": "Du", "given": "Fujun" } }, { "name": { "family": "Pascucci", "given": "Ilaria" } }, { "name": { "family": "Ilee", "given": "John" } }, { "name": { "family": "Izidoro", "given": "Andre" } }, { "name": { "family": "Jorgensen", "given": "Jes" } }, { "name": { "family": "Kama", "given": "Mihkel" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "Kim", "given": "Jinyoung Serena" } }, { "name": { "family": "Leisawitz", "given": "David" } }, { "name": { "family": "Lichtenberg", "given": "Tim" } }, { "name": { "family": "van der Marel", "given": "Nienke" } }, { "name": { "family": "Meixner", "given": "Margaret" } }, { "name": { "family": "Monnier", "given": "John" } }, { "name": { "family": "Picogna", "given": "Giovanni" } }, { "name": { "family": "Pontoppidan", "given": "Klaus" } }, { "name": { "family": "Shang", "given": "Hsien" } }, { "name": { "family": "Simon", "given": "Jake" } }, { "name": { "family": "Wilner", "given": "David" } } ] }, "title": "Planet formation: The case for large efforts on the computational side", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.04546.pdf
", "abstract": "Modern astronomy has finally been able to observe protoplanetary disks in\nreasonable resolution and detail, unveiling the processes happening during\nplanet formation. These observed processes are understood under the framework\nof disk-planet interaction, a process studied analytically and modeled\nnumerically for over 40 years. Long a theoreticians' game, the wealth of\nobservational data has been allowing for increasingly stringent tests of the\ntheoretical models. Modeling efforts are crucial to support the interpretation\nof direct imaging analyses, not just for potential detections but also to put\nmeaningful upper limits on mass accretion rates and other physical quantities\nin current and future large-scale surveys. This white paper addresses the\nquestions of what efforts on the computational side are required in the next\ndecade to advance our theoretical understanding, explain the observational\ndata, and guide new observations. We identified the nature of accretion, ab\ninitio planet formation, early evolution, and circumplanetary disks as major\nfields of interest in computational planet formation. We recommend that\nmodelers relax the approximations of alpha-viscosity and isothermal equations\nof state, on the grounds that these models use flawed assumptions, even if they\ngive good visual qualitative agreement with observations. We similarly\nrecommend that population synthesis move away from 1D hydrodynamics. The\ncomputational resources to reach these goals should be developed during the\nnext decade, through improvements in algorithms and the hardware for hybrid\nCPU/GPU clusters. Coupled with high angular resolution and great line\nsensitivity in ground based interferometers, ELTs and JWST, these advances in\ncomputational efforts should allow for large strides in the field in the next\ndecade.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-102652824", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-102652824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.04546", "primary_object": { "basename": "1903.04546.pdf", "url": "https://authors.library.caltech.edu/records/0dzps-xyx46/files/1903.04546.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Lyra, Wladimir; Haworth, Thomas; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mv73a-2bf98", "eprint_id": 96554, "eprint_status": "archive", "datestamp": "2023-08-19 14:51:19", "lastmod": "2024-01-14 21:48:17", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jang-Condell-H", "name": { "family": "Jang-Condell", "given": "Hannah" } }, { "name": { "family": "Brittain", "given": "Sean" } }, { "name": { "family": "Weinberger", "given": "Alycia" } }, { "name": { "family": "Liu", "given": "Michael" } }, { "name": { "family": "Faherty", "given": "Jacqueline" } }, { "name": { "family": "Bae", "given": "Jaehan" } }, { "name": { "family": "Andrews", "given": "Sean" } }, { "name": { "family": "Ansdell", "given": "Megan" } }, { "name": { "family": "Birnstiel", "given": "Til" } }, { "name": { "family": "Boss", "given": "Alan" } }, { "name": { "family": "Close", "given": "Laird" } }, { "name": { "family": "Currie", "given": "Thayne" } }, { "name": { "family": "Desch", "given": "Steven J" } }, { "name": { "family": "Dodson-Robinson", "given": "Sarah" } }, { "name": { "family": "Dong", "given": "Chuanfei" } }, { "name": { "family": "Duchene", "given": "Gaspard" } }, { "name": { "family": "Espaillat", "given": "Catherine" } }, { "name": { "family": "Follette", "given": "Kate" } }, { "name": { "family": "Gaidos", "given": "Eric" } }, { "name": { "family": "Gao", "given": "Peter" } }, { "name": { "family": "Haghighipour", "given": "Nader" } }, { "name": { "family": "Hartnett", "given": "Hilairy" } }, { "name": { "family": "Hasegawa", "given": "Yasuhiro" } }, { "name": { "family": "Kama", "given": "Mihkel" } }, { "name": { "family": "Kim", "given": "Jinyoung Serena" } }, { "name": { "family": "K\u00f3sp\u00e1l", "given": "\u00c1gnes" } }, { "name": { "family": "Lisse", "given": "Carey" } }, { "name": { "family": "Lyra", "given": "Wladimir" } }, { "name": { "family": "Macintosh", "given": "Bruce" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "name": { "family": "McGehee", "given": "Peregrine" } }, { "name": { "family": "Meyer", "given": "Michael" } }, { "name": { "family": "Peretz", "given": "Eliad" } }, { "name": { "family": "Perez", "given": "Laura" } }, { "name": { "family": "Pontoppidan", "given": "Klaus" } }, { "name": { "family": "Sallum", "given": "Steph" } }, { "name": { "family": "Salyk", "given": "Colette" } }, { "name": { "family": "Szentgyorgyi", "given": "Andrew" } }, { "name": { "family": "Wagner", "given": "Kevin" } } ] }, "title": "Protoplanetary Disk Science Enabled by Extremely Large Telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.05077.pdf
", "abstract": "The processes that transform gas and dust in circumstellar disks into diverse exoplanets remain poorly understood. One key pathway is to study exoplanets as they form in their young (\u223cfew~Myr) natal disks. Extremely Large Telescopes (ELTs) such as GMT, TMT, or ELT, can be used to establish the initial chemical conditions, locations, and timescales of planet formation, via (1)~measuring the physical and chemical conditions in protoplanetary disks using infrared spectroscopy and (2)~studying planet-disk interactions using imaging and spectro-astrometry. Our current knowledge is based on a limited sample of targets, representing the brightest, most extreme cases, and thus almost certainly represents an incomplete understanding. ELTs will play a transformational role in this arena, thanks to the high spatial and spectral resolution data they will deliver. We recommend a key science program to conduct a volume-limited survey of high-resolution spectroscopy and high-contrast imaging of the nearest protoplanetary disks that would result in an unbiased, holistic picture of planet formation as it occurs.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-101806526", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-101806526", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.05077", "primary_object": { "basename": "1903.05077.pdf", "url": "https://authors.library.caltech.edu/records/mv73a-2bf98/files/1903.05077.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Jang-Condell, Hannah; Brittain, Sean; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6z32y-hds87", "eprint_id": 96568, "eprint_status": "archive", "datestamp": "2023-08-19 14:53:28", "lastmod": "2024-01-14 21:48:29", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan" }, "orcid": "0000-0003-2649-2288" }, { "name": { "family": "Sallum", "given": "Steph" } }, { "name": { "family": "Boss", "given": "Alan" } }, { "name": { "family": "Brandt", "given": "Timothy" } }, { "name": { "family": "Briesemeister", "given": "Zack" } }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "name": { "family": "Close", "given": "Laird" }, "orcid": "0000-0002-2167-8246" }, { "name": { "family": "Crepp", "given": "Justin" } }, { "name": { "family": "Currie", "given": "Thayne" } }, { "name": { "family": "Fortney", "given": "Jonathan" } }, { "name": { "family": "Girard", "given": "Julien" } }, { "name": { "family": "Jensen-Clem", "given": "Rebecca" } }, { "name": { "family": "Kama", "given": "Mihkel" } }, { "name": { "family": "Kraus", "given": "Adam" } }, { "name": { "family": "Konopacky", "given": "Quinn" } }, { "name": { "family": "Liu", "given": "Michael" } }, { "name": { "family": "Marley", "given": "Mark" } }, { "name": { "family": "Marois", "given": "Christian" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "name": { "family": "Meyer", "given": "Michael" } }, { "name": { "family": "Morley", "given": "Caroline" } }, { "name": { "family": "Nielsen", "given": "Eric" } }, { "name": { "family": "Skemer", "given": "Andrew" } }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason" }, "orcid": "0000-0003-0774-6502" }, { "name": { "family": "Wu", "given": "Ya-Lin" } } ] }, "title": "The Demographics and Atmospheres of Giant Planets with the ELTs", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.06299.pdf
", "abstract": "Gas giants are the most readily detectable exoplanets but fundamental questions about their system architectures, formation, migration, and atmospheres have been unanswerable with the current generation of ground- and space-based facilities. The dominant techniques to detect and characterize giant planets \u2212 radial velocities, transits, direct imaging, microlensing, and astrometry \u2212 are each isolated to a limited range of planet masses, separations, ages, and temperatures. These windows into the arrangement and physical properties of giant planets have spawned new questions about the timescale and location of their assembly; the distributions of planet mass and orbital separation at young and old ages; the composition and structure of their atmospheres; and their orbital and rotational angular momentum architectures. The ELTs will address these questions by building bridges between these islands of mass, orbital distance, and age. The angular resolution, collecting area, all-sky coverage, and novel instrumentation suite of these facilities are needed to provide a complete map of the orbits and atmospheric evolution of gas giant planets (0.3\u221210 M_(Jup)) across space (0.1\u2212100 AU) and time (1 Myr to 10 Gyr). This white paper highlights the scientific potential of the GMT and TMT to address these outstanding questions, with a particular focus on the role of direct imaging and spectroscopy of large samples of giant planets that will soon be made available with Gaia.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-133911809", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-133911809", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.06299", "primary_object": { "basename": "1903.06299.pdf", "url": "https://authors.library.caltech.edu/records/6z32y-hds87/files/1903.06299.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Bowler, Brendan; Sallum, Steph; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/96sb7-4yb62", "eprint_id": 96514, "eprint_status": "archive", "datestamp": "2023-08-19 14:52:59", "lastmod": "2024-01-14 21:48:12", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kastner-J-H", "name": { "family": "Kastner", "given": "Joel H." }, "orcid": "0000-0002-3138-8250" }, { "id": "Allers-K-N", "name": { "family": "Allers", "given": "Katelyn" }, "orcid": "0000-0003-0580-7244" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan" }, "orcid": "0000-0003-2649-2288" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Drake-J-J", "name": { "family": "Drake", "given": "Jeremy" }, "orcid": "0000-0002-0210-2276" }, { "id": "Dupuy-T-J", "name": { "family": "Dupuy", "given": "Trent" }, "orcid": "0000-0001-9823-1445" }, { "id": "Faherty-J", "name": { "family": "Faherty", "given": "Jackie" }, "orcid": "0000-0001-6251-0573" }, { "id": "Gagn\u00e9-J", "name": { "family": "Gagn\u00e9", "given": "Jonathan" }, "orcid": "0000-0002-2592-9612" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael" }, "orcid": "0000-0003-2232-7664" }, { "id": "Mamajek-E-E", "name": { "family": "Mamajek", "given": "Eric" }, "orcid": "0000-0003-2008-1488" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Shkolnik-E-L", "name": { "family": "Shkolnik", "given": "Evgenya" }, "orcid": "0000-0002-7260-5821" }, { "id": "Song-Inseok", "name": { "family": "Song", "given": "Inseok" }, "orcid": "0000-0002-5815-7372" }, { "id": "White-R-J", "name": { "family": "White", "given": "Russel" }, "orcid": "0000-0001-5313-7498" }, { "id": "Zuckerman-B", "name": { "family": "Zuckerman", "given": "Ben" } } ] }, "title": "The Early Evolution of Stars and Exoplanet Systems: Exploring and Exploiting Nearby, Young Stars", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.06242.pdf
", "abstract": "Our knowledge of the population of young (age \u227e750 Myr) stars that lie within ~120 pc of the Sun is rapidly accelerating. The vast majority of these nearby, young stars can be placed in kinematically coherent groups (nearby, young moving groups; NYMGs). NYMGs and their member stars afford unmatched opportunities to explore a wide variety of aspects of the early evolution of stars and exoplanet systems, including stellar initial mass functions and age determination methods; the magnetic activities and high-energy radiation environments of young, late-type stars; the dynamics of young binary and hierarchical multiple systems; the late evolutionary stages of circumstellar disks; and, especially, direct-imaging discovery and characterization of massive young exoplanets. In this Astro2020 Science White Paper, we describe how our understanding of these and many other aspects of the early lives of stars and planetary systems is ripe for progress over the next decade via the identification and study of NYMG members with present and next-generation facilities and instruments.", "date": "2019-06-19", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190619-083616757", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190619-083616757", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.06242", "primary_object": { "basename": "1903.06242.pdf", "url": "https://authors.library.caltech.edu/records/96sb7-4yb62/files/1903.06242.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Kastner, Joel H.; Allers, Katelyn; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4wwn1-mmf51", "eprint_id": 96488, "eprint_status": "archive", "datestamp": "2023-08-19 14:49:49", "lastmod": "2024-01-14 21:48:02", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. Jeremy" } }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Marley-M-S", "name": { "family": "Marley", "given": "Mark S." }, "orcid": "0000-0002-5251-2943" }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "McElwain-M-W", "name": { "family": "McElwain", "given": "Michael" }, "orcid": "0000-0003-0241-8956" }, { "id": "Bendek-E-A", "name": { "family": "Bendek", "given": "Eduardo" } }, { "id": "Kuchner-M-J", "name": { "family": "Kuchner", "given": "Marc J." }, "orcid": "0000-0002-2387-5489" }, { "id": "Meyer-M-R", "name": { "family": "Meyer", "given": "Michael R." }, "orcid": "0000-0003-1227-3084" }, { "id": "Ammons-S-M", "name": { "family": "Ammons", "given": "S. Mark" }, "orcid": "0000-0001-5172-7902" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Hasegawa-Yasuhiro", "name": { "family": "Hasegawa", "given": "Yasuhiro" }, "orcid": "0000-0002-9017-3663" }, { "id": "L\u00f3pez-Morales-M", "name": { "family": "L\u00f3pez-Morales", "given": "Mercedes" }, "orcid": "0000-0003-3204-8183" }, { "id": "Lyra-W", "name": { "family": "Lyra", "given": "Wladimir" }, "orcid": "0000-0002-3768-7542" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Ben" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Packham-C", "name": { "family": "Packham", "given": "Chris" }, "orcid": "0000-0001-7827-5758" }, { "id": "Robinson-T-D", "name": { "family": "Robinson", "given": "Tyler" } } ] }, "title": "The Critical, Strategic Importance of Adaptive Optics-Assisted Ground-Based Telescopes for the Success of Future NASA Exoplanet Direct Imaging Missions", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.05468.pdf
", "abstract": "Ground-based telescopes coupled with adaptive optics (AO) have been playing a leading role in exoplanet direct imaging science and technological development for the past two decades and will continue to have an indispensable role for the next decade and beyond. Over the next decade, extreme AO systems on 8-10m telescopes will 1) mitigate risk for WFIRST-CGI by identifying numerous planets the mission can spectrally characterize, 2) validate performance requirements and motivate improvements to atmosphere models needed to unambiguously characterize solar system-analogues from space, and 3) mature novel technological innovations useful for space. Extremely Large Telescopes can deliver the first thermal infrared (10 \u03bcm) images of rocky planets around Sun-like stars and identify biomarkers. These data provide a future NASA direct imaging flagship mission (i.e. HabEx, LUVOIR) with numerous exo-Earth candidates and critical ancillary information to help clarify whether these planets are habitable.", "date": "2019-06-17", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190617-154836647", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190617-154836647", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.05468", "primary_object": { "basename": "1903.05468.pdf", "url": "https://authors.library.caltech.edu/records/4wwn1-mmf51/files/1903.05468.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "Currie, Thayne; Belikov, Ruslan; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5a7vt-zxp24", "eprint_id": 96390, "eprint_status": "archive", "datestamp": "2023-08-19 16:16:09", "lastmod": "2023-10-20 21:07:55", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hirsch-L-A", "name": { "family": "Hirsch", "given": "Lea A." }, "orcid": "0000-0001-8058-7443" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David R." }, "orcid": "0000-0002-5741-3047" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Marcy-G-W", "name": { "family": "Marcy", "given": "Geoffrey W." }, "orcid": "0000-0002-2909-0113" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Gonzalez-E-J", "name": { "family": "Gonzalez", "given": "Erica" } }, { "id": "Blunt-S-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Isaacson-H-T", "name": { "family": "Isaacson", "given": "Howard" }, "orcid": "0000-0002-0531-1073" }, { "id": "Kosiarek-M-R", "name": { "family": "Kosiarek", "given": "Molly" }, "orcid": "0000-0002-6115-4359" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Sinukoff-E", "name": { "family": "Sinukoff", "given": "Evan" }, "orcid": "0000-0002-5658-0601" }, { "id": "Weiss-L-M", "name": { "family": "Weiss", "given": "Lauren" }, "orcid": "0000-0002-3725-3058" } ] }, "title": "Discovery of a White Dwarf Companion to HD 159062", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: spectroscopic \u2013 binaries: visual \u2013 white dwarfs", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2018 October 1; revised 2019 April 16; accepted 2019 April 17; published 2019 June 12. \n\nWe would like to thank the anonymous referee for many helpful and detailed suggestions that have helped to improve this manuscript. We thank Pierre Bergeron for providing updated white dwarf cooling models including L'-band synthetic photometry. L.A.H. would like to thank James Graham for helpful discussion on this project, and Erik Petigura for carrying out HIRES observations and performing a spectroscopic analysis of the properties of HD 159062 A. M.R.K acknowledges support from the NSF Graduate Research Fellowship, grant No. DGE 1339067. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacilities: Keck:I (HIRES) - , Keck:II (NIRC2) - , Lick:Shane (ShARCS) - , Palomar:Hale (PHARO). - \n\nSoftware: Emcee (Foreman-Mackey et al. 2013), VIP (Gomez Gonzalez et al. 2017), isoclassify (Huber et al. 2017), pyKLIP (Wang et al. 2015), photutils (Bradley et al. 2017).\n\nPublished - Hirsch_2019_ApJ_878_50.pdf
Submitted - 1905.06440.pdf
", "abstract": "We report on the discovery of a white dwarf companion to the nearby late G dwarf star, HD 159062. The companion is detected in 14 years of precise radial velocity (RV) data, and in high-resolution imaging observations. RVs of HD 159062 from 2003 to 2018 reveal an acceleration of \u221213.3 \u00b1 0.12 m s^(-1) yr^(-1), indicating that it hosts a companion with a long-period orbit. Subsequent imaging observations with the ShaneAO system on the Lick Observatory 3 m Shane telescope, the PHARO AO system on the Palomar Observatory 5 m telescope, and the NIRC2 AO system at the Keck II 10 m telescope reveal a faint companion 2.\"7 from the primary star. We performed relative photometry, finding \u0394J = 10.09 \u00b1 0.38 mag, \u0394K_S = 10.06\u00b10.22 mag, and \u0394L\u2032 = 9.67\u00b10.08 mag for the companion from these observations. Analysis of the radial velocities, astrometry, and photometry reveals that the combined data set can only be reconciled for the scenario where HD 159062 B is a white dwarf. A full Bayesian analysis of the RV and imaging data to obtain the cooling age, mass, and orbital parameters of the white dwarf indicates that the companion is an old M_B = 0.65^(+0.12)_(\u22120.04) M_\u2299 white dwarf with an orbital period of P = 250^(+130)_(\u221276) yr, and a cooling age of \u03c4 = 8.2^(+0.3)_(\u22120.5) Gyr.", "date": "2019-06-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "878", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 50", "id_number": "CaltechAUTHORS:20190613-114026491", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190613-114026491", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1339067" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ab1b11", "primary_object": { "basename": "1905.06440.pdf", "url": "https://authors.library.caltech.edu/records/5a7vt-zxp24/files/1905.06440.pdf" }, "related_objects": [ { "basename": "Hirsch_2019_ApJ_878_50.pdf", "url": "https://authors.library.caltech.edu/records/5a7vt-zxp24/files/Hirsch_2019_ApJ_878_50.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Hirsch, Lea A.; Ciardi, David R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h06h5-9k287", "eprint_id": 93415, "eprint_status": "archive", "datestamp": "2023-08-19 15:44:52", "lastmod": "2023-10-20 17:07:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mejia-Prada-C", "name": { "family": "Mejia Prada", "given": "Camilo" } }, { "id": "Chen-Pin", "name": { "family": "Chen", "given": "Pin" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Vector vortex coronagraphy for exoplanet detection with spatially variant diffractive waveplates", "ispublished": "pub", "full_text_status": "restricted", "note": "\u00a9 2019 Optical Society of America. \n\nReceived 11 December 2018; accepted 15 December 2018; posted 9 January 2019 (Doc. ID 354564); published 11 February 2019. \n\nFunding: National Aeronautics and Space Administration (NASA). \n\nWe thank Beam Engineering for technical support and for developing the vortex phase masks discussed here.", "abstract": "Optical vortex coronagraphs have recently been deployed on most of the world's largest ground-based telescopes to assist in the search for faint exoplanets and dust emission near stars. These instruments typically make use of vector vortex phase masks, and at short near-infrared wavelengths, the phase masks tend to be spatially variant liquid-crystal-polymer-based diffractive waveplates. Optical vortex coronagraphs also hold great promise as a potential means of imaging terrestrial exoplanets in nearby solar systems with space-based telescopes, for which nearly ideal vortex phase masks will be needed. Here, we briefly summarize the optical vortex coronagraph, foreseen performance requirements for terrestrial exoplanet imaging detection, the obstacles to nearly ideal diffractive-waveplate-based vortex phase masks, and recent broadband performance demonstrations.", "date": "2019-05-01", "date_type": "published", "publication": "Journal of the Optical Society of America B", "volume": "36", "number": "5", "publisher": "Optical Society of America", "pagerange": "D13-D19", "id_number": "CaltechAUTHORS:20190304-082306585", "issn": "0740-3224", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190304-082306585", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1364/josab.36.000d13", "resource_type": "article", "pub_year": "2019", "author_list": "Serabyn, Eugene; Mejia Prada, Camilo; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6c6v7-cck54", "eprint_id": 91384, "eprint_status": "archive", "datestamp": "2023-08-19 15:44:26", "lastmod": "2023-10-19 22:28:02", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Levraud-N", "name": { "family": "Levraud", "given": "Nicolas" } } ] }, "title": "Vortex fiber nulling for exoplanet observations. I. Experimental demonstration in monochromatic light", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2019 Optical Society of America. \n\nReceived 8 November 2018; revised 29 March 2019; accepted 1 April 2019; posted 1 April 2019 (Doc. ID 349990); published 19 April 2019. \n\nFunding: National Science Foundation (NSF) (AST-1602444); Jet Propulsion Laboratory (JPL); California Institute of Technology.\n\nSubmitted - 1811.02083.pdf
", "abstract": "Vortex fiber nulling is a method for spectroscopically characterizing exoplanets at small angular separations, \u2272", "date": "2019-05-01", "date_type": "published", "publication": "Optics Letters", "volume": "44", "number": "9", "publisher": "Optical Society of America", "pagerange": "2204-2207", "id_number": "CaltechAUTHORS:20181130-143911660", "issn": "0146-9592", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181130-143911660", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "JPL" }, { "agency": "Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1364/OL.44.002204", "primary_object": { "basename": "1811.02083.pdf", "url": "https://authors.library.caltech.edu/records/6c6v7-cck54/files/1811.02083.pdf" }, "resource_type": "article", "pub_year": "2019", "author_list": "Echeverri, Daniel; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6h75w-73983", "eprint_id": 94592, "eprint_status": "archive", "datestamp": "2023-08-19 15:01:31", "lastmod": "2024-01-14 21:42:14", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "L\u00f3pez-Morales-M", "name": { "family": "L\u00f3pez-Morales", "given": "Mercedes" }, "orcid": "0000-0003-3204-8183" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Teske-J-K", "name": { "family": "Teske", "given": "Johanna K." } }, { "id": "Gaidos-E-J", "name": { "family": "Gaidos", "given": "Eric" }, "orcid": "0000-0002-5258-6846" }, { "id": "Kempton-E-M-R", "name": { "family": "Kempton", "given": "Eliza M.-R." }, "orcid": "0000-0002-1337-9051" }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole K." }, "orcid": "0000-0002-8507-1304" }, { "id": "Rackham-B-V", "name": { "family": "Rackham", "given": "Benjamin V." } }, { "id": "Ben-Ami-S", "name": { "family": "Ben-Ami", "given": "Sagi" }, "orcid": "0000-0001-6760-3074" }, { "id": "Bikby-J", "name": { "family": "Birkby", "given": "Jayne" } }, { "id": "Charbonneau-D", "name": { "family": "Charbonneau", "given": "David" }, "orcid": "0000-0002-9003-484X" }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird" }, "orcid": "0000-0002-2167-8246" }, { "id": "Crane-J-D", "name": { "family": "Crane", "given": "Jeff" } }, { "id": "Dressing-C-D", "name": { "family": "Dressing", "given": "Courtney" }, "orcid": "0000-0001-8189-0233" }, { "id": "Froning-C-S", "name": { "family": "Froning", "given": "Cynthia" }, "orcid": "0000-0001-8499-2892" }, { "id": "Hasegawa-Yasuhiro", "name": { "family": "Hasegawa", "given": "Yasuhiro" }, "orcid": "0000-0002-9017-3663" }, { "id": "Konopacky-Q-M", "name": { "family": "Konopacky", "given": "Quinn" }, "orcid": "0000-0002-9936-6285" }, { "id": "Kopparapu-R-K", "name": { "family": "Kopparapu", "given": "Ravi K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Ramirez-R", "name": { "family": "Ramirez", "given": "Ramses" } }, { "id": "Stelter-D", "name": { "family": "Stelter", "given": "Deno" } }, { "id": "Szentgyorgyi-A-H", "name": { "family": "Szentgyorgyi", "given": "Andrew" }, "orcid": "0000-0002-0255-2525" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "Detecting Earth-like Biosignatures on Rocky Exoplanets around Nearby Stars with Ground-based Extremely Large Telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "Submitted - 1903.09523.pdf
", "abstract": "As we begin to discover rocky planets in the habitable zone of nearby stars with missions like TESS and CHEOPS, we will need quick advancements on instrumentation and observational techniques that will enable us to answer key science questions, such as What are the atmospheric characteristics of habitable zone rocky planets? How common are Earth-like biosignatures in rocky\nplanets?} How similar or dissimilar are those planets to Earth? Over the next decade we expect to have discovered several Earth-analog candidates, but we will not have the tools to study the atmospheres of all of them in detail. Ground-based ELTs can identify biosignatures in the spectra of these candidate exo-Earths and understand how the planets' atmospheres compare to the Earth at different epochs. Transit spectroscopy, high-resolution spectroscopy, and reflected-light direct imaging on ELTs can identify multiple biosignatures for habitable zone, rocky planets around M stars at optical to near-infrared wavelengths. Thermal infrared direct imaging can detect habitable zone, rocky planets around AFGK stars, identifying ozone and motivating reflected-light\nfollow-up observations with NASA missions like HabEx/LUVOIR. Therefore, we recommend that the Astro2020 Decadal Survey Committee support: (1) the search for Earth-like biosignatures on rocky planets around nearby stars as a key science case; (2) the construction over the next decade of ground-based Extremely Large Telecopes (ELTs), which will provide the large aperture and\nspatial resolution necessary to start revealing the atmospheres of\nEarth-analogues around nearby stars; (3) the development of instrumentation that optimizes the detection of biosignatures; and (4) the generation of accurate line lists for potential biosignature gases, which are needed as model templates to detect those molecules.", "date": "2019-04-09", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20190409-125055281", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190409-125055281", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1903.09523", "primary_object": { "basename": "1903.09523.pdf", "url": "https://authors.library.caltech.edu/records/6h75w-73983/files/1903.09523.pdf" }, "resource_type": "monograph", "pub_year": "2019", "author_list": "L\u00f3pez-Morales, Mercedes; Currie, Thayne; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1yfh3-zj930", "eprint_id": 93785, "eprint_status": "archive", "datestamp": "2023-08-19 14:48:53", "lastmod": "2023-10-20 17:25:11", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Kasliwal-M-M", "name": { "family": "Kasliwal", "given": "Mansi M." }, "orcid": "0000-0002-5619-4938" }, { "id": "Krafton-K", "name": { "family": "Krafton", "given": "Kelsie" } }, { "id": "Lau-Ryan-M", "name": { "family": "Lau", "given": "Ryan" } }, { "id": "Rho-Jeonghee", "name": { "family": "Rho", "given": "Jeonghee" }, "orcid": "0000-0003-3643-839X" }, { "id": "Leonard-D-C", "name": { "family": "Leonard", "given": "Douglas C." } }, { "id": "De-Kishalay", "name": { "family": "De", "given": "Kishalay" }, "orcid": "0000-0002-8989-0542" }, { "id": "Jencson-J-E", "name": { "family": "Jencson", "given": "Jacob" }, "orcid": "0000-0001-5754-4007" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Yan-Lin", "name": { "family": "Yan", "given": "Lin" }, "orcid": "0000-0003-1710-9339" }, { "id": "Gehrz-R-D", "name": { "family": "Gehrz", "given": "Robert D." }, "orcid": "0000-0003-1319-4089" }, { "id": "Helou-G", "name": { "family": "Helou", "given": "George" }, "orcid": "0000-0003-3367-3415" }, { "id": "Van-Dyk-S-D", "name": { "family": "Van Dyk", "given": "Schuyler D." }, "orcid": "0000-0001-9038-9950" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Fox-O-D", "name": { "family": "Fox", "given": "Ori D." }, "orcid": "0000-0003-2238-1572" }, { "id": "Clayton-G", "name": { "family": "Clayton", "given": "Geoffrey" }, "orcid": "0000-0002-0141-7436" } ] }, "title": "Supernova 2017eaw: Molecule and Dust Formation from Infrared Observations", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter \u2013 supernovae: individual (SN2017eaw)", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2019 January 28; revised 2019 February 16; accepted 2019 February 18; published 2019 March 13. \n\nWe thank Jim Fuller and Luc Dessart for helpful discussions and input on the paper draft. We also thank the anonymous referee for reviewing the article. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Some of the data presented herein were obtained at Palomar Observatory, which is operated by a collaboration between California Institute of Technology, Jet Propulsion Laboratory, Yale University, and National Astronomical Observatories of China. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. R.D.G. was supported by NASA and the United States Air Force. \n\nFacilities: Hale (WIRC, TripleSpec) - , Spitzer - Spitzer Space Telescope satellite, Keck (MOSFIRE, NIRES) - . \n\nSoftware: astropy (Astropy Collaboration et al. 2013; Price-Whelan et al. 2018), spextool (Cushing et al. 2004), xtellcor (Vacca et al. 2003), MOSFIRE data reduction pipeline (McLean et al. 2012), MOCASSIN (v.2.02.72 Ercolano et al. 2003, 2005, 2008), Matplotlib (Hunter 2007).\n\nPublished - Tinyanont_2019_ApJ_873_127.pdf
Submitted - 1901.01940.pdf
", "abstract": "We present infrared (IR) photometry and spectroscopy of the Type II-P SN 2017eaw and its progenitor in the nearby galaxy NGC 6946. Progenitor observations in the Ks band in four epochs from 1 yr to 1 day before the explosion reveal no significant variability in the progenitor star greater than 6% that lasts longer than 200 days. SN 2017eaw is a typical SN II-P with near-IR and mid-IR photometric evolution similar to those of SNe 2002hh and 2004et, other normal SNe II-P in the same galaxy. Spectroscopic monitoring during the plateau phase reveals a possible high-velocity He I 1.083 \u03bcm absorption line, indicative of a shock interaction with the circumstellar medium. Spectra between 389 and 480 days postexplosion reveal a strong CO first overtone emission at 389 days, with a line profile matching that of SN 1987A from the same epoch, indicating ~10^(\u22123) M\u2299 of CO at 1800 K. From the 389 days epoch until the most recent observation at 566 days, the first overtone feature fades while the 4.5 \u03bcm excess, likely from the CO fundamental band, remains. This behavior indicates that the CO has not been destroyed, but that the gas has cooled enough that the levels responsible for first overtone emissions are no longer populated. Finally, the evolution of Spitzer 3.6 \u03bcm photometry shows evidence for dust formation in SN 2017eaw, with a dust mass of 10^(\u22126) or 10^(\u22124) M\u2299 assuming carbonaceous or silicate grains, respectively.", "date": "2019-03-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "873", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 127", "id_number": "CaltechAUTHORS:20190313-132337168", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190313-132337168", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/ab0897", "primary_object": { "basename": "Tinyanont_2019_ApJ_873_127.pdf", "url": "https://authors.library.caltech.edu/records/1yfh3-zj930/files/Tinyanont_2019_ApJ_873_127.pdf" }, "related_objects": [ { "basename": "1901.01940.pdf", "url": "https://authors.library.caltech.edu/records/1yfh3-zj930/files/1901.01940.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Tinyanont, Samaporn; Kasliwal, Mansi M.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/crwjn-e5v50", "eprint_id": 92934, "eprint_status": "archive", "datestamp": "2023-08-19 14:30:05", "lastmod": "2023-10-20 16:39:10", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Cook-Therese", "name": { "family": "Cook", "given": "Therese" } }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallack-N-L", "name": { "family": "Wallack", "given": "Nicole" }, "orcid": "0000-0003-0354-0187" }, { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W. Jerry" }, "orcid": "0000-0002-6618-1137" } ] }, "title": "Reference Star Differential Imaging of Close-in Companions and Circumstellar Disks with the NIRC2 Vortex Coronagraph at the W. M. Keck Observatory", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2018 November 28; revised 2019 January 13; accepted 2019 January 14; published 2019 February 14. \n\nG.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacility: Keck:II (NIRC2). - \n\nSoftware: VIP (Gomez Gonzalez et al. 2017), QACITS (Huby et al. 2015, 2017), Astropy (The Astropy Collaboration et al. 2018), orbitize (Blunt et al. 2018).\n\nPublished - Ruane_2019_AJ_157_118.pdf
Accepted Version - 1901.04090.pdf
", "abstract": "Reference star differential imaging (RDI) is a powerful strategy for high-contrast imaging. Using example observations taken with the vortex coronagraph mode of Keck/NIRC2 in L' band, we demonstrate that RDI provides improved sensitivity to point sources at small angular separations compared to angular differential imaging (ADI). Applying RDI to images of the low-mass stellar companions HIP 79124 C (192 mas separation, \u0394L' = 4.01) and HIP 78233 B (141 mas separation, \u0394L' = 4.78), the latter a first imaging detection, increases the significance of their detections by up to a factor of 5 with respect to ADI. We compare methods for reference frame selection and find that pre-selection of frames improves detection significance of point sources by up to a factor of 3. In addition, we use observations of the circumstellar disks around MWC 758 and 2MASS J16042165\u22122130284 to show that RDI allows for accurate mapping of scattered light distributions without self-subtraction artifacts.", "date": "2019-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "157", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 118", "id_number": "CaltechAUTHORS:20190214-105330131", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190214-105330131", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aafee2", "primary_object": { "basename": "1901.04090.pdf", "url": "https://authors.library.caltech.edu/records/crwjn-e5v50/files/1901.04090.pdf" }, "related_objects": [ { "basename": "Ruane_2019_AJ_157_118.pdf", "url": "https://authors.library.caltech.edu/records/crwjn-e5v50/files/Ruane_2019_AJ_157_118.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Ruane, Garreth; Ngo, Henry; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3vn41-hc225", "eprint_id": 97040, "eprint_status": "archive", "datestamp": "2023-08-19 14:38:33", "lastmod": "2023-10-20 21:51:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Van-Zandt-J", "name": { "family": "Van Zandt", "given": "Judah" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Spectral Calibration of VERVE", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2019 IEEE. \n\nThe authors thank Erik Hovland for extensive technical support with regard to VERVE's camera software. \n\nWe are also grateful to Daniel Echeverri for his efforts to refine VERVE's interferometry script. \n\nFinally, we thank Gary Ruane for his assistance in the implementation of the estimate_transform function in the forward model. This correction was indispensable in reaching our precision goal.", "abstract": "With the exception of the transit method employed by the Kepler Space Telescope, the radial velocity (RV)technique has proven to be the most fruitful exoplanet detection method to date. High precision measurements with state-of-the-art equipment have achieved RV precision on the order of 0.5 m s^(\u22121). Given that Earth's induced RV on the sun is on the order of 10 cm s^(\u22121), this regime represents the next milestone on the path to finding Earth-like planets orbiting distant stars. We describe the Vacuum Extreme Radial Velocity Experiment (VERVE), a single mode fiber-fed high-resolution echelle spectrometer which integrates interferometry with spectroscopy with the aim of achieving RV precision at the 10 cm s^(\u22121) level, on par with the ESPRESSO spectrograph (Pepe et al., 2014 [1]). The addition of interferometry relaxes the spectral calibration requirement by several orders of magnitude. We detail the spectral calibration of VERVE, including the development of a precise forward model and a data reduction pipeline to facilitate spectral extraction. We examine the model's agreement with the spectra of various calibration sources and present the results of spectral extractions performed on 635 nm and 780 nm laser sources to demonstrate VERVE's spectroscopic capabilities. We note the 10 cm s^(\u22121) RV precision threshold for detecting Earth-like planets, and show that the ~ 2 pixel agreement we achieve is consistent with this requirement. We briefly introduce results pertaining to interferometry and conclude by describing the future stages of testing to prepare VERVE for novel RV measurements.", "date": "2019-03", "date_type": "published", "publisher": "IEEE", "place_of_pub": "Piscataway, NJ", "pagerange": "1-11", "id_number": "CaltechAUTHORS:20190710-153753056", "isbn": "9781538668542", "book_title": "2019 IEEE Aerospace Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190710-153753056", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1109/aero.2019.8741644", "resource_type": "book_section", "pub_year": "2019", "author_list": "Van Zandt, Judah; Wallace, J. Kent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0v44h-6px71", "eprint_id": 93358, "eprint_status": "archive", "datestamp": "2023-08-19 14:07:07", "lastmod": "2023-10-20 17:04:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Engler-N", "name": { "family": "Engler", "given": "N." }, "orcid": "0000-0002-2719-2925" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "H. M." } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "J." }, "orcid": "0000-0002-9133-3091" }, { "id": "Maire-A-L", "name": { "family": "Maire", "given": "A.-L." }, "orcid": "0000-0002-2591-4138" }, { "id": "Henning-Th", "name": { "family": "Henning", "given": "T." } }, { "id": "Avenhaus-H", "name": { "family": "Avenhaus", "given": "H." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Feldt-M", "name": { "family": "Feldt", "given": "M." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "S." }, "orcid": "0000-0001-8074-2562" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Olofsson-J", "name": { "family": "Olofsson", "given": "J." } }, { "id": "Pantin-E-J", "name": { "family": "Pantin", "given": "E." } }, { "id": "Perrot-C", "name": { "family": "Perrot", "given": "C." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" } ] }, "title": "Investigating the presence of two belts in the HD 15115 system", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2019 ESO. Article published by EDP Sciences. \n\nReceived 31 May 2018; Accepted 6 December 2018; Published online 20 February 2019. \n\nBased on data collected at the European Southern Observatory, Chile under programs 098.C-0686 and 096.C-0640. \n\nWe would like to thank the referee for many thoughtful comments which helped to improve this paper. This work issupported by the Swiss National Science Foundation through the grant number 200020 - 162630. We acknowledge the financial support from the Programme National de Plan\u00e9tologie (PNP) of CNRS-INSU co-funded by the CNES, and by the Agence Nationale de la Recherche (ANR-14-CE33-0018). J.O. acknowledges financial support from the ICM (Iniciativa Cient\u00edfica Milenio) via the N\u00facleo Milenio de Formaci\u00f3n Planetaria grant, from the Universidad de Valpara\u00edso, and from Fondecyt (grant 1180395). J.M. acknowledges support from the NASA through the NASA Hubble Fellowship grant HST-HF2-51414.001 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555.\n\nPublished - aa33542-18.pdf
Submitted - 1812.02750.pdf
", "abstract": "Context. High-contrast instruments like SPHERE (Spectro- Polarimetric High-contrast Exoplanet REsearch) enable spatial resolution of young planetary systems and allow us to study the connection between planets and the dust contained in debris discs by the gravitational influence a planet can have on its environment. \n\nAims. We present new observations of the edge-on debris disc around HD 15115 (F star at 48.2 pc) obtained in the near-IR. We search for observational evidence for a second inner planetesimal ring in the system. \n\nMethods. We obtained total intensity and polarimetric data in the broad bands J and H and processed the data with differential imaging techniques achieving an angular resolution of about 40 mas. A grid of models describing the spatial distribution of the grains in the disc is generated to constrain the geometric parameters of the disc and to explore the presence of a second belt. We perform a photometric analysis of the data and compare disc brightness in two bands in scattered and in polarized light. \n\nResults. We observe an axisymmetric planetesimal belt with a radius of ~2\u2032\u2032, an inclination of 85.8\u00b0 \u00b1 0.7\u00b0 and position angle of 278.9\u00b0 \u00b1 0.1\u00b0. The photometric analysis shows that the west side is ~2.5 times brighter in total intensity than the east side in both bands, while for polarized light in the J band this ratio is only 1.25. We also find that the J\u2013H colour of the disc appears to be red for the radial separations r \u2272 2\u2032\u2032 and is getting bluer for the larger separations. The maximum polarization fraction is 15\u201320% at r ~ 2.5\u2032\u2032. The polarized intensity image shows some structural features inside the belt which can be interpreted as an additional inner belt. \n\nConclusions. The apparent change of disc colour from red to blue with an increasing radial separation from the star could be explained by the decreasing average grain size with distance. The presence of an inner belt slightly inclined with respect to the main planetesimal belt is suspected from the data but the analysis and modelling presented here cannot establish a firm conclusion due to the faintness of the disc and its high inclination.", "date": "2019-02", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "622", "publisher": "EDP Sciences", "pagerange": "Art. No. \tA192", "id_number": "CaltechAUTHORS:20190228-135738094", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190228-135738094", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Swiss National Science Foundation (SNSF)", "grant_number": "200020-162630" }, { "agency": "Programme National de Plan\u00e9tologie (PNP)" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Institut national des sciences de l'Univers (INSU)" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR-14-CE33-0018" }, { "agency": "Iniciativa Cient\u00edfica Milenio" }, { "agency": "Universidad de Valpara\u00edso" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1180395" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51414.001" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA Sagan Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201833542", "primary_object": { "basename": "aa33542-18.pdf", "url": "https://authors.library.caltech.edu/records/0v44h-6px71/files/aa33542-18.pdf" }, "related_objects": [ { "basename": "1812.02750.pdf", "url": "https://authors.library.caltech.edu/records/0v44h-6px71/files/1812.02750.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Engler, N.; Boccaletti, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/79bby-79h41", "eprint_id": 91767, "eprint_status": "archive", "datestamp": "2023-08-19 14:03:24", "lastmod": "2024-02-02 21:07:47", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell A." }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" }, { "id": "Kataria-T", "name": { "family": "Kataria", "given": "Tiffany" }, "orcid": "0000-0003-3759-9080" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Henderson-C-P", "name": { "family": "Henderson", "given": "Charles" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Hale-D-D-S", "name": { "family": "Hale", "given": "David" } }, { "id": "Smith-R-M", "name": { "family": "Smith", "given": "Roger" } }, { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" }, { "id": "Santos-L-D-Jr", "name": { "family": "Santos", "given": "Louis D., Jr" } }, { "id": "Kekas-J", "name": { "family": "Kekas", "given": "Jason" } }, { "id": "Escuti-M-J", "name": { "family": "Escuti", "given": "Michael J." } } ] }, "title": "WIRC+Pol: A Low-resolution Near-infrared Spectropolarimeter", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: polarimeters \u2013 methods: data analysis \u2013 methods: observational \u2013 techniques: polarimetric", "note": "\u00a9 2018. The Astronomical Society of the Pacific. \n\nReceived 2018 September 23; accepted 2018 November 7; published 2018 December 13. \n\nThis work is supported by the National Science Foundation under grant No. AAG-1816341. The WIRC+Pol upgrade was in part supported by a grant from the Mt. Cuba Astronomical Foundation. We thank Paulo Miles-P\u00e1ez for providing us polarized spectra of Elia 2\u201325 polarized standard star for comparison with our observations and for discussions on best practices in reducing near-IR spectropolarimetric data. We thank staff of Palomar Observatory for assisting our observations. Palomar Observatory is operated by a collaboration between California Institute of Technology, Jet Propulsion Laboratory, Yale University, and National Astronomical Observatories of China.\n\nAccepted Version - 1811.03138.pdf
", "abstract": "WIRC+Pol is a newly commissioned low-resolution (R ~ 100), near-infrared (J and H bands) spectropolarimetry mode of the Wide-field InfraRed Camera (WIRC) on the 200 inch Hale Telescope at Palomar Observatory. The instrument utilizes a novel polarimeter design based on a quarter-wave plate and a polarization grating (PG), which provides full linear polarization measurements (Stokes I, Q, and U) in one exposure. The PG also has high transmission across the J and H bands. The instrument is situated at the prime focus of an equatorially mounted telescope. As a result, the system only has one reflection in the light path providing minimal telescope induced polarization. A data reduction pipeline has been developed for WIRC+Pol to produce linear polarization measurements from observations. WIRC+Pol has been on-sky since 2017 February. Results from the first year commissioning data show that the instrument has a high dispersion efficiency as expected from the polarization grating. We demonstrate the polarimetric stability of the instrument with rms variation at 0.2% level over 30 minutes for a bright standard star (J = 8.7). While the spectral extraction is photon noise limited, polarization calibration between sources remain limited by systematics, likely related to gravity dependent pointing effects. We discuss instrumental systematics we have uncovered in the data, their potential causes, along with calibrations that are necessary to eliminate them. We describe a modulator upgrade that will eliminate the slowly varying systematics and provide polarimetric accuracy better than 0.1%.", "date": "2019-02", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "131", "number": "996", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 025001", "id_number": "CaltechAUTHORS:20181213-132118775", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181213-132118775", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1816341" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "NASA Hubble Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.1088/1538-3873/aaef0f", "primary_object": { "basename": "1811.03138.pdf", "url": "https://authors.library.caltech.edu/records/79bby-79h41/files/1811.03138.pdf" }, "resource_type": "article", "pub_year": "2019", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4fgrs-68k96", "eprint_id": 92031, "eprint_status": "archive", "datestamp": "2023-08-22 00:34:00", "lastmod": "2023-10-19 23:54:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Hirsch-L-A", "name": { "family": "Hirsch", "given": "Lea" }, "orcid": "0000-0001-8058-7443" }, { "id": "Lee-Eve-J", "name": { "family": "Lee", "given": "Eve J." }, "orcid": "0000-0002-1228-9820" }, { "id": "Ruffio-J-B", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan" }, "orcid": "0000-0003-2649-2288" }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David" }, "orcid": "0000-0002-5741-3047" }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos Alberto" }, "orcid": "0000-0003-2050-1710" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Isaacson-H-T", "name": { "family": "Isaacson", "given": "Howard" }, "orcid": "0000-0002-0531-1073" }, { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Kosiarek-M-R", "name": { "family": "Kosiarek", "given": "Molly" }, "orcid": "0000-0002-6115-4359" }, { "id": "Marcy-G-W", "name": { "family": "Marcy", "given": "Geoff" }, "orcid": "0000-0002-2909-0113" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Petigura-E-A", "name": { "family": "Petigura", "given": "Erik" }, "orcid": "0000-0003-0967-2893" }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Sinukoff-E", "name": { "family": "Sinukoff", "given": "Evan" }, "orcid": "0000-0002-5658-0601" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Weiss-L-M", "name": { "family": "Weiss", "given": "Lauren" }, "orcid": "0000-0002-3725-3058" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" } ] }, "title": "Deep Exploration of \u03f5 Eridani with Keck Ms-band Vortex Coronagraphy and Radial Velocities: Mass and Orbital Parameters of the Giant Exoplanet", "ispublished": "pub", "full_text_status": "public", "keywords": "planet\u2013disk interactions; planets and satellites: dynamical evolution and stability; planets and satellites: gaseous planets; planetary systems; techniques: high angular resolution; techniques: radial velocities", "note": "\u00a9 2019. The American Astronomical Society. \n\nReceived 2018 May 1; revised 2018 October 16; accepted 2018 October 29; published 2019 January 3. \n\nThe authors would like to acknowledge the contributions and useful comments from Prof. Debra Fischer and Prof. James Graham. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This work was partially performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. (C) 2017. All rights reserved. E.C. acknowledges support from NASA through Hubble Fellowship grant HF2-51355 awarded by STScI, which is operated by AURA, Inc. for NASA under contract NAS5-26555. We also acknowledge support from NASA/NExSS through grant no. NNX15AD95G. \n\nSoftware: RadVel (Fulton et al. 2018), emcee (Foreman-Mackey et al. 2013), VIP (Gomez Gonzalez et al. 2017), PyKLIP (Wang et al. 2015).\n\nPublished - Mawet_2019_AJ_157_33.pdf
Accepted Version - 1810.03794.pdf
", "abstract": "We present the most sensitive direct imaging and radial velocity (RV) exploration of epsilon Eridani to date. epsilon Eridani is an adolescent planetary system, reminiscent of the early solar system. It is surrounded by a prominent and complex debris disk that is likely stirred by one or several gas giant exoplanets. The discovery of the RV signature of a giant exoplanet was announced 15 yr ago, but has met with scrutiny due to possible confusion with stellar noise. We confirm the planet with a new compilation and analysis of precise RV data spanning 30 yr, and combine it with upper limits from our direct imaging search, the most sensitive ever performed. The deep images were taken in the Ms band (4.7 \u03bcm) with the vortex coronagraph recently installed in W.M. Keck Observatory's infrared camera NIRC2, which opens a sensitive window for planet searches around nearby adolescent systems. The RV data and direct imaging upper limit maps were combined in an innovative joint Bayesian analysis, providing new constraints on the mass and orbital parameters of the elusive planet. epsilon Eridani b has a mass of 0.78_(-0.12)^(+0.38} M_(Jup) and is orbiting epsilon Eridani at about 3.48 \u00b1 0.02 au with a period of 7.37 \u00b1 0.07 yr. The eccentricity of epsilon Eridani b's orbit is 0.07_(-0.05)^(+0.06), an order of magnitude smaller than early estimates and consistent with a circular orbit. We discuss our findings from the standpoint of planet\u2013disk interactions and prospects for future detection and characterization with the James Webb Space Telescope.", "date": "2019-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "157", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 33", "id_number": "CaltechAUTHORS:20190103-105531269", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-105531269", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "NNX15AD95G" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "Miller Institute for Basic Research in Science" }, { "agency": "NSF Graduate Research Fellowship" }, { "agency": "NSF Astronomy and Astrophysics Fellowship" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "TAPIR" }, { "id": "Walter-Burke-Institute-for-Theoretical-Physics" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aaef8a", "primary_object": { "basename": "1810.03794.pdf", "url": "https://authors.library.caltech.edu/records/4fgrs-68k96/files/1810.03794.pdf" }, "related_objects": [ { "basename": "Mawet_2019_AJ_157_33.pdf", "url": "https://authors.library.caltech.edu/records/4fgrs-68k96/files/Mawet_2019_AJ_157_33.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Mawet, Dimitri; Hirsch, Lea; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/fhrsk-yh704", "eprint_id": 94385, "eprint_status": "archive", "datestamp": "2023-08-22 00:36:52", "lastmod": "2023-10-20 17:55:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Calvin-B-A", "name": { "family": "Calvin", "given": "Benjamin" } }, { "id": "Levraud-N", "name": { "family": "Levraud", "given": "Nicolas" } }, { "id": "Roberson-M", "name": { "family": "Roberson", "given": "Milan" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita" } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } } ] }, "title": "Demonstration of an electric field conjugation algorithm for improved starlight rejection through a single mode optical fiber", "ispublished": "pub", "full_text_status": "public", "keywords": "exoplanets; high contrast imaging; wavefront control; wavefront sensing; spectroscopy", "note": "\u00a9 The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. \n\nPaper 18116 received Nov. 16, 2018; accepted for publication Mar. 7, 2019; published online Mar. 26, 2019.\n\nPublished - 019004_1.pdf
", "abstract": "Linking a coronagraph instrument to a spectrograph via a single-mode optical fiber is a pathway toward detailed characterization of exoplanet atmospheres with current and future ground- and space-based telescopes. However, given the extreme brightness ratio and small angular separation between planets and their host stars, the planet signal-to-noise ratio will likely be limited by the unwanted coupling of starlight into the fiber. To address this issue, we utilize a wavefront control loop and a deformable mirror to systematically reject starlight from the fiber by measuring what is transmitted through the fiber. The wavefront control algorithm is based on the formalism of electric field conjugation (EFC), which in our case accounts for the spatial mode selectivity of the fiber. This is achieved by using a control output that is the overlap integral of the electric field with the fundamental mode of a single-mode fiber. This quantity can be estimated by pairwise image plane probes injected using a deformable mirror. We present simulation and laboratory results that demonstrate our approach offers a significant improvement in starlight suppression through the fiber relative to a conventional EFC controller. With our experimental setup, which provides an initial normalized intensity of 3\u2009\u2009\u00d7\u2009\u200910\u2009\u2009\u2212\u2009\u20094 in the fiber at an angular separation of 4\u03bb\u2009\u2009/\u2009\u2009D, we obtain a final normalized intensity of 3\u2009\u2009\u00d7\u2009\u200910\u2009\u2009\u2212\u2009\u20096 in monochromatic light at \u03bb\u2009\u2009=\u2009\u2009635\u2009\u2009nm through the fiber (100\u2009\u2009\u00d7\u2009\u2009 suppression factor) and 2\u2009\u2009\u00d7\u2009\u200910\u2009\u2009\u2212\u2009\u20095 in \u0394\u03bb\u2009\u2009/\u2009\u2009\u03bb\u2009\u2009=\u2009\u20098\u2009\u2009%\u2009\u2009 broadband light about \u03bb\u2009\u2009=\u2009\u2009625\u2009\u2009nm (10\u2009\u2009\u00d7\u2009\u2009 suppression factor). The fiber-based approach improves the sensitivity of spectral measurements at high contrast and may serve as an integral part of future space-based exoplanet imaging missions as well as ground-based instruments.", "date": "2019-01", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "5", "number": "1", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 019004", "id_number": "CaltechAUTHORS:20190402-160051415", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190402-160051415", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.jatis.5.1.019004", "primary_object": { "basename": "019004_1.pdf", "url": "https://authors.library.caltech.edu/records/fhrsk-yh704/files/019004_1.pdf" }, "resource_type": "article", "pub_year": "2019", "author_list": "Llop Sayson, Jorge; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/39z93-fxc62", "eprint_id": 84406, "eprint_status": "archive", "datestamp": "2023-08-22 00:31:23", "lastmod": "2023-10-18 16:11:20", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Suh-Myoung-Gyun", "name": { "family": "Suh", "given": "Myoung-Gyun" }, "orcid": "0000-0002-9527-0585" }, { "id": "Yi-Xu", "name": { "family": "Yi", "given": "Xu" }, "orcid": "0000-0002-2485-1104" }, { "id": "Lai-Yu-Hung", "name": { "family": "Lai", "given": "Yu-Hung" }, "orcid": "0000-0002-9639-6569" }, { "id": "Leifer-Stephanie-D", "name": { "family": "Leifer", "given": "S." }, "orcid": "0000-0002-8980-7825" }, { "id": "Grudinin-Ivan-S", "name": { "family": "Grudinin", "given": "Ivan S." } }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Martin-Emily-C", "name": { "family": "Martin", "given": "Emily C." }, "orcid": "0000-0002-0618-5128" }, { "id": "Fitzgerald-Michael-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Doppmann-Gregory-W", "name": { "family": "Doppmann", "given": "G." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Papp-Scott-B", "name": { "family": "Papp", "given": "Scott B." }, "orcid": "0000-0001-8290-7076" }, { "id": "Diddams-Scott-A", "name": { "family": "Diddams", "given": "Scott A." }, "orcid": "0000-0002-2144-0764" }, { "id": "Beichman-Charles-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" }, { "id": "Vahala-K-J", "name": { "family": "Vahala", "given": "Kerry" }, "orcid": "0000-0003-1783-1380" } ] }, "title": "Searching for Exoplanets Using a Microresonator Astrocomb", "ispublished": "pub", "full_text_status": "public", "keywords": "Integrated optics; Nonlinear optics; Optics and photonics; Solitons", "note": "\u00a9 2018 Springer Nature Publishing AG.\n\nReceived 29 April 2018; Accepted 05 November 2018; Published\n14 December 2018.\n\nWe gratefully acknowledge J. Schlieder, A. Howard, F. Hadaegh and the support of the entire Keck summit team. We thank D. Carlson and H. Timmers for preparing the HNLF. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. This paper made use of data available in the NASA Exoplanet Archive and the Keck Observatory Archive. S.D. and S.P. acknowledge support from NIST. K.V., M.-G.S., X.Y. and Y.-H.L. thank the Kavli Nanoscience Institute and NASA for support under KJV.JPLNASA-1-JPL.1459106. This research was carried out at JPL and the California Institute of Technology under a contract with NASA and funded through the JPL Research and Technology Development Program.\n\nData availability:\nThe data that support the plots within this paper and other findings of this study are available from the corresponding authors upon reasonable request.\n\nContributions:\nM.-G.S., S.L., G.V., M.P.F., D.M., S.B.P., S.A.D., C.B. and K.V. conceived the experiments. All co-authors designed and performed experiments. M.-G.S. and X.Y. built the soliton microcomb set-up and EO comb set-up with S.L., I.S.G., S.A.D., S.B.P. and Y.-H.L. providing assistance. G.D. managed operations and the experimental interface of the Keck II telescope. E.C.M., J.W. and C.B. analysed NIRSPEC data. C.B. and K.V. supervised the experiment. M.-G.S., C.B. and K.V. prepared the manuscript with input from all co-authors.\n\nCompeting interests:\nThe authors declare no competing interests.\n\nAccepted Version - nihms-1511766.pdf
Submitted - 1801.05174.pdf
", "abstract": "Orbiting planets induce a weak radial velocity (RV) shift in the host star that provides a powerful method of planet detection. Importantly, the RV technique provides information about the exoplanet mass, which is unavailable with the complementary technique of transit photometry. However, RV detection of an Earth-like planet in the 'habitable zone' requires extreme spectroscopic precision that is only possible using a laser frequency comb (LFC). Conventional LFCs require complex filtering steps to be compatible with astronomical spectrographs, but a new chip-based microresonator device, the Kerr soliton microcomb, is an ideal match for astronomical spectrograph resolution and can eliminate these filtering steps. Here, we demonstrate an atomic/molecular line-referenced soliton microcomb for calibration of astronomical spectrographs. These devices can ultimately provide LFC systems that would occupy only a few cubic centimetres, thereby greatly expanding implementation of these technologies into remote and mobile environments beyond the research lab.", "date": "2019-01", "date_type": "published", "publication": "Nature Photonics", "volume": "13", "number": "1", "publisher": "Nature Publishing Group", "pagerange": "25-30", "id_number": "CaltechAUTHORS:20180119-080155783", "issn": "1749-4885", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180119-080155783", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "National Institute of Standards and Technology (NIST)" }, { "agency": "Kavli Nanoscience Institute" }, { "agency": "NASA", "grant_number": "KJV.JPLNASA-1-JPL.1459106" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "JPL Research and Technology Development Fund" } ] }, "local_group": { "items": [ { "id": "Kavli-Nanoscience-Institute" }, { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.1038/s41566-018-0312-3", "pmcid": "PMC6364311", "primary_object": { "basename": "1801.05174.pdf", "url": "https://authors.library.caltech.edu/records/39z93-fxc62/files/1801.05174.pdf" }, "related_objects": [ { "basename": "nihms-1511766.pdf", "url": "https://authors.library.caltech.edu/records/39z93-fxc62/files/nihms-1511766.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Suh, Myoung-Gyun; Yi, Xu; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/s7fcg-9cj50", "eprint_id": 91937, "eprint_status": "archive", "datestamp": "2023-09-15 06:12:55", "lastmod": "2023-10-23 21:24:30", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Jewell-J-B", "name": { "family": "Jewell", "given": "J." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "S." } }, { "id": "Stark-C-C", "name": { "family": "Stark", "given": "C." } } ] }, "title": "Segmented coronagraph design and analysis (SCDA): an initial design study of apodized vortex coronagraphs", "ispublished": "unpub", "full_text_status": "public", "note": "This work was performed in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA). This work was funded by the Exoplanet Exploration Program (ExEP). G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444.\n\nSubmitted - 1712.02042.pdf
", "abstract": "The segmented coronagraph design and analysis (SCDA) study is a coordinated effort, led by Stuart Shaklan (JPL) and supported by NASA's Exoplanet Exploration Program (ExEP), to provide efficient coronagraph design concepts for exoplanet imaging with future segmented aperture space telescopes. This document serves as an update on the apodized vortex coronagraph designs devised by the Caltech/JPL SCDA team. Apodized vortex coronagraphs come in two flavors, where the apodization is achieved either by use of 1) a gray-scale semi-transparent pupil mask or 2) a pair of deformable mirrors in series. Each approach has attractive benefits. This document presents a comprehensive review of the former type. Future theoretical investigations will further explore the use of deformable mirrors for apodization.", "date": "2018-12-21", "date_type": "published", "publisher": "arXiv", "id_number": "CaltechAUTHORS:20181220-112906957", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181220-112906957", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.48550/arXiv.1712.02042v1", "primary_object": { "basename": "1712.02042.pdf", "url": "https://authors.library.caltech.edu/records/s7fcg-9cj50/files/1712.02042.pdf" }, "resource_type": "monograph", "pub_year": "2018", "author_list": "Ruane, G.; Jewell, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mfbxv-y6d38", "eprint_id": 91064, "eprint_status": "archive", "datestamp": "2023-08-19 12:59:06", "lastmod": "2023-10-19 22:06:19", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "Jonathan J." }, "orcid": "0000-0002-9843-4354" }, { "id": "Hood-C", "name": { "family": "Hood", "given": "Callie" } }, { "id": "Morley-C-V", "name": { "family": "Morley", "given": "Caroline V." }, "orcid": "0000-0002-4404-0456" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" } ] }, "title": "Detecting Water In the atmosphere of HR 8799 c with L-band High Dispersion Spectroscopy Aided By Adaptive Optics", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: observational \u2013 planetary systems \u2013 planets and satellites: atmospheres \u2013 planets and\nsatellites: composition \u2013 techniques: high angular resolution \u2013 techniques: spectroscopic", "note": "\u00a9 2018 The American Astronomical Society. \n\nReceived 2018 June 25; revised 2018 September 21; accepted 2018 September 24; published 2018 November 20. \n\nWe thank the anonymous referee for constructive comments and suggestions that greatly improved the manuscript. We acknowledge Rowan Swain for carefully proofreading the manuscript. We thank Jason Wang and Olivier Wertz for providing precise astrometric predictions for HR 8799 c. We thank Roger Smith and the NIRSPEC team, especially Ian McLean, Mike Fitzgerald, and Emily Martin, for valuable input on the correlated noise of ALADDIN InSb detectors. We thank Geoff Blake and his group for offering advice for NIRSPEC L-band observation and sharing the PyNIRSPEC data reduction pipeline. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Wang_2018_AJ_156_272.pdf
Accepted Version - 1809.09080.pdf
", "abstract": "High-dispersion spectroscopy of brown dwarfs and exoplanets enables exciting science cases, e.g., mapping surface inhomogeneity and measuring spin rate. Here, we present L-band observations of HR 8799 c using Keck NIRSPEC (R = 15,000) in adaptive optics (AO) mode (NIRSPAO). We search for molecular species (H_2O and CH_4) in the atmosphere of HR 8799 c with a template-matching method, which involves cross-correlation between reduced spectra and a template spectrum. We detect H_2O but not CH_4, which suggests disequilibrium chemistry in the atmosphere of HR 8799 c, and this is consistent with previous findings. We conduct planet signal injection simulations to estimate the sensitivity of our AO-aided high-dispersion spectroscopy observations. We conclude that 10^(\u22124) contrast can be reached in the L band. The sensitivity is mainly limited by the accuracy of line list used in modeling spectra and detector noise. The latter will be alleviated by the NIRSPEC upgrade.", "date": "2018-12", "date_type": "published", "publication": "Astronomical Journal", "volume": "156", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 272", "id_number": "CaltechAUTHORS:20181120-073429737", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181120-073429737", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aae47b", "primary_object": { "basename": "Wang_2018_AJ_156_272.pdf", "url": "https://authors.library.caltech.edu/records/mfbxv-y6d38/files/Wang_2018_AJ_156_272.pdf" }, "related_objects": [ { "basename": "1809.09080.pdf", "url": "https://authors.library.caltech.edu/records/mfbxv-y6d38/files/1809.09080.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qc20s-gpq41", "eprint_id": 90866, "eprint_status": "archive", "datestamp": "2023-08-19 12:41:09", "lastmod": "2023-10-19 14:58:10", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } } ] }, "title": "Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 techniques: spectroscopic", "note": "\u00a9 2018. The American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2018 April 16; revised 2018 September 5; accepted 2018 September 15; published 2018 November 9. \n\nG.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444.\n\nPublished - Ruane_2018_ApJ_867_143.pdf
Accepted Version - 1809.06483
", "abstract": "Instrumentation designed to characterize potentially habitable planets may combine adaptive optics and high-resolution spectroscopy techniques to achieve the highest possible sensitivity to spectral signs of life. Detecting the weak signal from a planet containing biomarkers will require exquisite control of the optical wavefront to maximize the planet signal and significantly reduce unwanted starlight. We present an optical technique, known as vortex fiber nulling (VFN), that allows polychromatic light from faint planets at extremely small separations from their host stars (\u227e\u03bb/D) to be efficiently routed to a diffraction-limited spectrograph via a single-mode optical fiber, while light from the star is prevented from entering the spectrograph. VFN takes advantage of the spatial selectivity of a single-mode fiber to isolate the light from close-in companions in a small field of view around the star. We provide theoretical performance predictions of a conceptual design and show that VFN may be utilized to characterize planets detected by radial velocity (RV) instruments in the infrared without knowledge of the azimuthal orientation of their orbits. Using a spectral template-matching technique, we calculate an integration time of ~400, ~100, and ~30 hr for Ross 128 b with Keck, the Thirty Meter Telescope, and the Large Ultraviolet/Optical/Infrared Surveyor, respectively.", "date": "2018-11-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "867", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 143", "id_number": "CaltechAUTHORS:20181113-112609469", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181113-112609469", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/aae262", "primary_object": { "basename": "1809.06483", "url": "https://authors.library.caltech.edu/records/qc20s-gpq41/files/1809.06483" }, "related_objects": [ { "basename": "Ruane_2018_ApJ_867_143.pdf", "url": "https://authors.library.caltech.edu/records/qc20s-gpq41/files/Ruane_2018_ApJ_867_143.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Ruane, Garreth; Wang, Ji; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/b5ym7-cww07", "eprint_id": 90285, "eprint_status": "archive", "datestamp": "2023-08-22 00:13:45", "lastmod": "2023-10-18 23:20:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruffio-J-B", "name": { "family": "Ruffio", "given": "Jean-Baptiste" }, "orcid": "0000-0003-2233-4821" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Czekala-I", "name": { "family": "Czekala", "given": "Ian" }, "orcid": "0000-0002-1483-8811" }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "De-Rosa-R", "name": { "family": "De Rosa", "given": "Robert J." }, "orcid": "0000-0002-4918-0247" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Wang-Jason-J", "name": { "family": "Wang", "given": "Jason J." }, "orcid": "0000-0003-0774-6502" }, { "id": "Hirsch-L-A", "name": { "family": "Hirsch", "given": "Lea" }, "orcid": "0000-0001-8058-7443" }, { "id": "Zhu-Zhaohuan", "name": { "family": "Zhu", "given": "Zhaohuan" }, "orcid": "0000-0003-3616-6822" }, { "id": "Nielsen-E-L", "name": { "family": "Nielsen", "given": "Eric L." }, "orcid": "0000-0001-6975-9056" } ] }, "title": "A Bayesian Framework for Exoplanet Direct Detection and Non-detection", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics; instrumentation: high angular resolution; methods: statistical; planetary systems; planet\u2013disk interactions; planets and satellites: detection", "note": "\u00a9 2018. The American Astronomical Society. \n\nReceived 2018 June 14; revised 2018 August 30; accepted 2018 August 31; published 2018 October 12. \n\nThis research was supported by grants from NSF, including AST-1411868 (J.-B.R., B.M.) and AST-1518332 (R.J.D.R.). Support was provided by grants from NASA, including NNX14AJ80G (B.M., J.-B.R.), NNX15AD95G (R.J.D.R.) and NNX15AC89G (R.J.D.R.). This work benefited from NASAs Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by NASAs Science Mission Directorate. \n\nFacility: Keck:II(NIRC2). - \n\nSoftware: pyKLIP13 (Wang et al. 2015), astropy14 (Astropy Collaboration et al. 2013), Matplotlib15 (Hunter 2007).\n\nPublished - Ruffio_2018_AJ_156_196.pdf
Accepted Version - 1809.08261
", "abstract": "Rigorously quantifying the information in high-contrast imaging data is important for informing follow-up strategies to confirm the substellar nature of a point source, constraining theoretical models of planet\u2013disk interactions, and deriving planet occurrence rates. However, within the exoplanet direct imaging community, non-detections have almost exclusively been defined using a frequentist detection threshold (i.e., contrast curve) and associated completeness. This can lead to conceptual inconsistencies when included in a Bayesian framework. A Bayesian upper limit is such that the true value of a parameter lies below this limit with a certain probability. The associated probability is the integral of the posterior distribution with the upper limit as the upper bound. In summary, a frequentist upper limit is a statement about the detectability of planets while a Bayesian upper limit is a statement about the probability of a parameter to lie in an interval given the data. The latter is therefore better suited for rejecting hypotheses or theoretical models based on their predictions. In this work we emphasize that Bayesian statistics and upper limits are more easily interpreted and typically more constraining than the frequentist approach. We illustrate the use of Bayesian analysis in two different cases: (1) with a known planet location where we also propose to use model comparison to constrain the astrophysical nature of the point source and (2) gap-carving planets in TW Hya. To finish, we also mention the problem of combining radial velocity and direct imaging observations.", "date": "2018-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "156", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 196", "id_number": "CaltechAUTHORS:20181016-142931784", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181016-142931784", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1411868" }, { "agency": "NSF", "grant_number": "AST-1518332" }, { "agency": "NASA", "grant_number": "NNX14AJ80G" }, { "agency": "NASA", "grant_number": "NNX15AD95G" }, { "agency": "NASA", "grant_number": "NNX15AC89G" }, { "agency": "Kavli Institute for Particle Astrophysics and Cosmology" }, { "agency": "NSF Graduate Research Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aade95", "primary_object": { "basename": "1809.08261", "url": "https://authors.library.caltech.edu/records/b5ym7-cww07/files/1809.08261" }, "related_objects": [ { "basename": "Ruffio_2018_AJ_156_196.pdf", "url": "https://authors.library.caltech.edu/records/b5ym7-cww07/files/Ruffio_2018_AJ_156_196.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Ruffio, Jean-Baptiste; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7v2bn-psh58", "eprint_id": 90348, "eprint_status": "archive", "datestamp": "2023-08-19 12:23:57", "lastmod": "2023-10-18 23:23:13", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Aguilar-J", "name": { "family": "Aguilar", "given": "Jonathan" }, "orcid": "0000-0003-3184-0873" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Oppenheimer-Rebecca", "name": { "family": "Oppenheimer", "given": "Rebecca" }, "orcid": "0000-0001-7130-7681" }, { "id": "Su-Katherine-Y-L", "name": { "family": "Su", "given": "Kate Y. L." }, "orcid": "0000-0002-3532-5580" }, { "id": "Cady-E", "name": { "family": "Cady", "given": "Eric" }, "orcid": "0000-0002-8789-2931" }, { "id": "Lockhart-T-G", "name": { "family": "Lockhart", "given": "Thomas" } }, { "id": "Matthews-C", "name": { "family": "Matthews", "given": "Christopher" }, "orcid": "0000-0002-7782-0272" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Leisenring-J", "name": { "family": "Leisenring", "given": "Jarron" }, "orcid": "0000-0002-0834-6140" }, { "id": "Ygouf-M", "name": { "family": "Ygouf", "given": "Marie" }, "orcid": "0000-0001-7591-2731" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" } ] }, "title": "A Deep Search for Planets in the Inner 15 au around Vega", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter \u2013 planets and satellites: detection \u2013 stars: individual (Vega) \u2013 techniques: high angular resolution", "note": "\u00a9 2018 The American Astronomical Society. \n\nReceived 2018 June 11; revised 2018 September 5; accepted 2018 September 11; published 2018 October 18. \n\nWe thank the anonymous referee for their helpful suggestions that improved this paper. We thank the Palomar mountain crew, especially Bruce Baker, Mike Doyle, Carolyn Heffner, John Henning, Greg van Idsinga, Steve Kunsman, Dan McKenna, Jean Mueller, Kajsa Peffer, Paul Nied, Joel Pearman, Kevin Rykoski, Carolyn Heffner, Jamey Eriksen, and Pam Thompson. We thank AAron Veicht for his contributions to the data acquisition during the observations. K.Y.L.S. acknowledges the partial support from the NASA grant NNX15AI86G. G.V. acknowledges the JPL Research & Technology Program and the NASA XRP grant 399131.02.07.02.66.\n\nPublished - Meshkat_2018_AJ_156_214.pdf
Accepted Version - 1809.06941.pdf
", "abstract": "We present the results of a deep high-contrast imaging search for planets around Vega. Vega is an ideal target for high-contrast imaging because it is bright, nearby, and young with a face-on two-belt debris disk that may be shaped by unseen planets. We obtained J- and H-band data on Vega with the coronagraphic integral-field spectrograph Project 1640 (P1640) at Palomar Observatory. Two nights of data were obtained in 2016, in poor seeing conditions, and two additional nights in more favorable conditions in 2017. In total, we obtained 5.5 hours of integration time on Vega in moderate to good seeing conditions (<1farcs5). We did not detect any low-mass companions in this system. Our data present the most sensitive contrast limits around Vega at very small separations (2\u201315 au) thus far, allowing us to place new constraints on the companions that may be sculpting the Vega system. In addition to new constraints, as the deepest data obtained with P1640, these observations form the final legacy of the now decommissioned instrument.", "date": "2018-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "156", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 214", "id_number": "CaltechAUTHORS:20181023-090840047", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181023-090840047", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX15AI86G" }, { "agency": "JPL Research and Technology Development Fund" }, { "agency": "NASA", "grant_number": "399131.02.07.02.66" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aae14f", "primary_object": { "basename": "1809.06941.pdf", "url": "https://authors.library.caltech.edu/records/7v2bn-psh58/files/1809.06941.pdf" }, "related_objects": [ { "basename": "Meshkat_2018_AJ_156_214.pdf", "url": "https://authors.library.caltech.edu/records/7v2bn-psh58/files/Meshkat_2018_AJ_156_214.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Meshkat, Tiffany; Nilsson, Ricky; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kn7bd-sq597", "eprint_id": 88847, "eprint_status": "archive", "datestamp": "2023-09-15 06:00:42", "lastmod": "2023-10-23 21:22:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Collins-K-A", "name": { "family": "Collins", "given": "Karen A." }, "orcid": "0000-0001-6588-9574" }, { "id": "Berriman-G-B", "name": { "family": "Berriman", "given": "G. Bruce" }, "orcid": "0000-0001-8388-534X" }, { "id": "Good-J-C", "name": { "family": "Good", "given": "John C." } }, { "id": "Calchi-Novati-S", "name": { "family": "Calchi Novati", "given": "S." }, "orcid": "0000-0002-7669-1069" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David R." }, "orcid": "0000-0002-5741-3047" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The KELT Follow-up Network and Transit False-positive Catalog: Pre-vetted False Positives for TESS", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: observational \u2013 techniques: photometric \u2013 techniques: spectroscopic \u2013 techniques: radial velocities", "note": "\u00a9 2018 The American Astronomical Society. \n \nReceived 2018 March 2; revised 2018 September 13; accepted 2018 September 18; published 2018 November 1. \n \nThe authors thank the anonymous reviewer and scientific editor for helpful suggestions regarding both form and content. We also thank other KELT-FUN participants who enabled, gathered, and/or reduced data for this project, including Michael Endl, Chas Beichman, Lars Buchhave, Debra Fischer, Ian Crossfield, Rahul Patel, and many others. This project makes use of data from the KELT survey, including support from The Ohio State University, Vanderbilt University, and Lehigh University, along with the KELT follow-up collaboration. Work performed by J.E.R. was supported by the Harvard Future Faculty Leaders Postdoctoral fellowship. D.J.S. and B.S.G. were partially supported by NSF CAREER grant AST-1056524. Early work on KELT-North was supported by NASA grant NNG04GO70G. Work by S.V.Jr. is supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1343012 and the David G. Price Fellowship in Astronomical Instrumentation. Work by G.Z. is provided by NASA through Hubble Fellowship grant HST-HF2-51402.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. K.K.M. acknowledges the support of the Theodore Dunham, Jr. Fund for Astronomical Research and the NASA Massachusetts Space Grant consortium. J.R.C. acknowledges partial support from NASA grant NNX14AB85G. D.W.L., K.A.C., and S.N.Q. acknowledge partial support from the TESS Mission. M.D.J., D.C.S., and E.G.H. thank the Brigham Young University College of Physical and Mathematical Sciences for continued support of the WMO and OPO research facilities. This paper includes data taken at The McDonald Observatory of The University of Texas at Austin. Research at the Phillips Academy Observatory is supported by the Israel Family Foundation and the Abbot Academy Association. This work is partially based on observations obtained with the 1.54 m telescope at Estaci\u00f3n Astrof\u00edsica de Bosque Alegre dependent on the National University of C\u00f3rdoba, Argentina. This research made use of Montage. It is funded by the National Science Foundation under grant number ACI-1440620, and was previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office, Computation Technologies Project, under Cooperative Agreement Number NCC5-626 between NASA and the California Institute of Technology. This work makes use of observations from the LCOGT network. We thank T\u00dcB\u0130TAK for the partial support in using T100 telescope with project number 16CT100-1096. Authors from Ankara University also acknowledge the support by the research fund of Ankara University (BAP) through the project 13B4240006. This work has made use of NASA's Astrophysics Data System, the Extrasolar Planet Encyclopedia, the NASA Exoplanet Archive, the SIMBAD database operated at CDS, Strasbourg, France, and the VizieR catalogue access tool, CDS, Strasbourg, France. We make use of Filtergraph, an online data visualization tool developed at Vanderbilt University through the Vanderbilt Initiative in Data-intensive Astrophysics (VIDA). We also used data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles; the Jet Propulsion Laboratory/California Institute of Technology, which is funded by the National Aeronautics and Space Administration; the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. MINERVA is a collaboration among the Harvard-Smithsonian Center for Astrophysics, The Pennsylvania State University, the University of Montana, and the University of New South Wales. MINERVA is made possible by generous contributions from its collaborating institutions and Mt. Cuba Astronomical Foundation, The David & Lucile Packard Foundation, National Aeronautics and Space Administration (EPSCOR grant NNX13AM97A), The Australian Research Council (LIEF grant LE140100050), and the National Science Foundation (grants 1516242 and 1608203). Any opinions, findings, and conclusions or recommendations expressed are those of the authors and do not necessarily reflect the views of the National Science Foundation. The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The National Geographic Society\u2014Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society. The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation. The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory. The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt. All data are subject to the copyright given in the copyright summary. Copyright information specific to individual plates is provided in the downloaded FITS headers. Supplemental funding for sky-survey work at the ST ScI is provided by the European Southern Observatory. \n \nSoftware: AstroImageJ (Collins et al. 2017), FilterGraph (Burger et al. 2013), ISIS (Alard & Lupton 1998; Alard 2000), TAPIR (Jensen 2013).\n\nPublished - Collins_2018_AJ_156_234.pdf
Accepted Version - 1803.01869.pdf
", "abstract": "The Kilodegree Extremely Little Telescope (KELT) project has been conducting a photometric survey of transiting planets orbiting bright stars for over 10 years. The KELT images have a pixel scale of ~23'' pixel^(\u22121)\u2014very similar to that of NASA's Transiting Exoplanet Survey Satellite (TESS)\u2014as well as a large point-spread function, and the KELT reduction pipeline uses a weighted photometric aperture with radius 3'. At this angular scale, multiple stars are typically blended in the photometric apertures. In order to identify false positives and confirm transiting exoplanets, we have assembled a follow-up network (KELT-FUN) to conduct imaging with spatial resolution, cadence, and photometric precision higher than the KELT telescopes, as well as spectroscopic observations of the candidate host stars. The KELT-FUN team has followed-up over 1600 planet candidates since 2011, resulting in more than 20 planet discoveries. Excluding ~450 false alarms of non-astrophysical origin (i.e., instrumental noise or systematics), we present an all-sky catalog of the 1128 bright stars (6 < V < 13) that show transit-like features in the KELT light curves, but which were subsequently determined to be astrophysical false positives (FPs) after photometric and/or spectroscopic follow-up observations. The KELT-FUN team continues to pursue KELT and other planet candidates and will eventually follow up certain classes of TESS candidates. The KELT FP catalog will help minimize the duplication of follow-up observations by current and future transit surveys such as TESS.", "date": "2018-11", "date_type": "published", "publication": "Astronomical Journal", "volume": "156", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 234", "id_number": "CaltechAUTHORS:20180816-090243676", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180816-090243676", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Harvard University" }, { "agency": "NSF", "grant_number": "AST-1056524" }, { "agency": "NASA", "grant_number": "NNG04GO70G" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1343012" }, { "agency": "Ohio State University" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51402.001-A" }, { "agency": "NASA", "grant_number": "NAS 5-26555" }, { "agency": "Theodore Dunham, Jr. Fund for Astronomical Research" }, { "agency": "NASA Massachusetts Space Grant Consortium" }, { "agency": "NASA", "grant_number": "NNX14AB85G" }, { "agency": "TESS Mission" }, { "agency": "Israel Family Foundation" }, { "agency": "Abbot Academy Association" }, { "agency": "NSF", "grant_number": "ACI-1440620" }, { "agency": "NASA", "grant_number": "NCC5-626" }, { "agency": "T\u00fcrkiye Bilimsel ve Teknolojik Ara\u015ft\u0131rma Kurumu (T\u00dcB\u0130TAK)", "grant_number": "16CT100-1096" }, { "agency": "Ankara University", "grant_number": "13B4240006" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "David and Lucile Packard Foundation" }, { "agency": "NASA", "grant_number": "NNX13AM97A" }, { "agency": "Australian Research Council", "grant_number": "LE140100050" }, { "agency": "NSF", "grant_number": "AST-1516242" }, { "agency": "NSF", "grant_number": "AST-1608203" }, { "agency": "NASA", "grant_number": "NAG W-2166" }, { "agency": "National Geographic Society" }, { "agency": "Alfred P. Sloan Foundation" }, { "agency": "Samuel Oschin Foundation" }, { "agency": "Eastman Kodak Corporation" }, { "agency": "Science and Technology Facilities Council (STFC)" }, { "agency": "Anglo-Australian Observatory" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aae582", "primary_object": { "basename": "Collins_2018_AJ_156_234.pdf", "url": "https://authors.library.caltech.edu/records/kn7bd-sq597/files/Collins_2018_AJ_156_234.pdf" }, "related_objects": [ { "basename": "1803.01869.pdf", "url": "https://authors.library.caltech.edu/records/kn7bd-sq597/files/1803.01869.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Collins, Karen A.; Berriman, G. Bruce; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vhchg-taa69", "eprint_id": 91530, "eprint_status": "archive", "datestamp": "2023-08-19 12:04:36", "lastmod": "2023-10-19 23:10:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Matthews-E", "name": { "family": "Matthews", "given": "Elisabeth" } }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Kennedy-G", "name": { "family": "Kennedy", "given": "Grant" }, "orcid": "0000-0001-6831-7547" }, { "id": "Sutlieff-B", "name": { "family": "Sutlieff", "given": "Ben" } }, { "id": "Wickenden-D", "name": { "family": "Wickenden", "given": "Dawn" } }, { "id": "Treves-S-B", "name": { "family": "Treves", "given": "Sam" } }, { "id": "David-T-J", "name": { "family": "David", "given": "Trevor" }, "orcid": "0000-0001-6534-6246" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Morales-F-Y", "name": { "family": "Morales", "given": "Farisa" }, "orcid": "0000-0001-9414-3851" }, { "id": "Shannon-A", "name": { "family": "Shannon", "given": "Andrew" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" } ] }, "title": "Constraining the presence of giant planets in two-belt debris disc systems with VLT/SPHERE direct imaging and dynamical arguments", "ispublished": "pub", "full_text_status": "public", "keywords": "planet-disc interactions, circumstellar matter, planetary systems", "note": "\u00a9 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model). \n\nAccepted 2018 July 3. Received 2018 July 2; in original form 2018 April 11. \n\nEM thanks the University of Exeter for support through a Ph.D. studentship. GMK is supported by the Royal Society as a Royal Society University Research Fellow. AS is partially supported by funding from the Center for Exoplanets and Habitable Worlds. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. \n\nThis work is based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 095.C-0549, 095.C-0838, 097.C-0949, 097.C-1019, and 099.C-0734. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.\n\nPublished - sty1778.pdf
Supplemental Material - sty1778_supplemental_table_3.zip
", "abstract": "Giant, wide-separation planets often lie in the gap between multiple, distinct rings of circumstellar debris: this is the case for the HR\u20098799 and HD\u200995086 systems, and even the Solar system where the Asteroid and Kuiper belts enclose the four gas and ice giants. In the case that a debris disc, inferred from an infrared excess in the SED, is best modelled as two distinct temperatures, we infer the presence of two spatially separated rings of debris. Giant planets may well exist between these two belts of debris, and indeed could be responsible for the formation of the gap between these belts. We observe 24 such two-belt systems using the VLT/SPHERE high-contrast imager, and interpret our results under the assumption that the gap is indeed formed by one or more giant planets. A theoretical minimum mass for each planet can then be calculated, based on the predicted dynamical time-scales to clear debris. The typical dynamical lower limit is \u223c0.2M_J in this work, and in some cases exceeds 1M_J. Direct imaging data, meanwhile, are typically sensitive to planets down to \u223c3.6M_J at 1\u2009arcsec, and 1.7M_J in the best case. Together, these two limits tightly constrain the possible planetary systems present around each target, many of which will be detectable with the next generation of high-contrast imagers.", "date": "2018-10-21", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "480", "number": "2", "publisher": "Royal Astronomical Society", "pagerange": "2757-2783", "id_number": "CaltechAUTHORS:20181205-163501986", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181205-163501986", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "University of Exeter" }, { "agency": "Royal Society" }, { "agency": "Center for Exoplanets and Habitable Worlds" }, { "agency": "Eberly College of Science" }, { "agency": "Pennsylvania State University" }, { "agency": "Pennsylvania Space Grant Consortium" }, { "agency": "Gaia Multilateral Agreement" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.1093/mnras/sty1778", "primary_object": { "basename": "sty1778.pdf", "url": "https://authors.library.caltech.edu/records/vhchg-taa69/files/sty1778.pdf" }, "related_objects": [ { "basename": "sty1778_supplemental_table_3.zip", "url": "https://authors.library.caltech.edu/records/vhchg-taa69/files/sty1778_supplemental_table_3.zip" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Matthews, Elisabeth; Hinkley, Sasha; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vpgb9-k0288", "eprint_id": 91954, "eprint_status": "archive", "datestamp": "2023-08-22 00:09:52", "lastmod": "2023-10-19 23:51:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "David-T-J", "name": { "family": "David", "given": "Trevor J." }, "orcid": "0000-0001-6534-6246" }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne A." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Albrecht-S", "name": { "family": "Albrecht", "given": "Simon" } }, { "id": "Liu-Zibo", "name": { "family": "Liu", "given": "Zibo" } } ] }, "title": "EPIC 203868608: A Low-mass Quadruple Star System in the Upper Scorpius OB Association", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: close; binaries: eclipsing; binaries: spectroscopic; stars: late-type; stars: low-mass; techniques: radial velocities", "note": "\u00a9 2018. The American Astronomical Society. \n\nReceived 2018 July 2; revised 2018 August 31; accepted 2018 September 2; published 2018 October 3. \n\nWe thank the anonymous referee for his or her comments and suggestions that significantly improved the manuscript. We acknowledge Konstantin Batygin, Jim Fuller, and Fred Adams for discussions on tidal evolution and Kozai\u2013Lidov perturbation in EPIC 203868608. We thank the PIs of KOA NIRC2 data, Christoph Baranec and Andrew Mann. S.A. acknowledges the support of the Danish Council for Independent Research, through DFF Sapere Aude Starting Grant No. 4181-00487B. Funding for the Stellar Astrophysics Centre is provided by The Danish National Research Foundation (Grant Agreement No. DNRF106). Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. T.J.D. acknowledges support from the JPL Exoplanetary Science Initiative. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - Wang_2018_ApJ_865_141.pdf
Accepted Version - 1809.01689.pdf
", "abstract": "Young multiple star systems provide excellent testing grounds for theories of star formation and evolution. EPIC 203868608 was previously studied as a triple star system in the Upper Scorpius OB association, but the followup Keck NIRC2/HIRES/NIRSPAO observations reported here reveal its quadruple nature. We find that the system consists of a double-lined spectroscopic binary (SB2) Aab (M5+M5) and an eclipsing binary (EB) Bab with a total mass that is lower than that of the SB2. Furthermore, we measure the obliquity of the EB using the Doppler tomography technique during the primary eclipse. EPIC 203868608 Bab is likely on an inclined orbit with a projected obliquity of -57_(-36)^(+40) degrees. The inclined orbit is used to constrain the tidal quality factor for low-mass stars and the evolution of the quadruple system. The analytic framework to infer obliquity that has been developed in this paper can be applied to other EB systems as well as transiting planets.", "date": "2018-10-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "865", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 141", "id_number": "CaltechAUTHORS:20181221-105356785", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181221-105356785", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Danish Council for Independent Research", "grant_number": "4181-00487B" }, { "agency": "Danish National Research Foundation", "grant_number": "DNRF106" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/aadee8", "primary_object": { "basename": "1809.01689.pdf", "url": "https://authors.library.caltech.edu/records/vpgb9-k0288/files/1809.01689.pdf" }, "related_objects": [ { "basename": "Wang_2018_ApJ_865_141.pdf", "url": "https://authors.library.caltech.edu/records/vpgb9-k0288/files/Wang_2018_ApJ_865_141.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Wang, Ji; David, Trevor J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/75sbs-2z649", "eprint_id": 89641, "eprint_status": "archive", "datestamp": "2023-08-22 00:06:06", "lastmod": "2024-02-02 21:05:34", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W. Jerry" }, "orcid": "0000-0002-6618-1137" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "Vanessa P." }, "orcid": "0000-0002-5407-2806" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Alvarez-C", "name": { "family": "Alvarez", "given": "Carlos" } }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "id": "Cook-Therese", "name": { "family": "Cook", "given": "Therese" } }, { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda Castell\u00e1", "given": "Bruno" } }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Ragland-S", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Zawol-Z", "name": { "family": "Zawol", "given": "Zo\u00eb" } } ] }, "title": "Characterizing the Performance of the NIRC2 Vortex Coronagraph at W. M. Keck Observatory", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics; planets and satellites: detection", "note": "\u00a9 2018. The American Astronomical Society. \n\nReceived 2018 May 28; revised 2018 August 2; accepted 2018 August 14; published 2018 September 14. \n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This work was funded, in part, by a Summer Undergraduate Research Fellowship (SURF) from California Institute of Technology. W.J.X. would like to thank Johanna Hardin at Pomona College for her advice on implementing the statistical models. G.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. E.C. acknowledges support from NASA through Hubble Fellowship grant HF2-51355 awarded by STScI, which is operated by AURA, Inc. for NASA under contract NAS5-26555. O.A. is an F.R.S-FNRS research associate. V.B. acknowledges government sponsorship; this research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. \n\nFacility: Keck II (NIRC2). - \n\nSoftware: VIP (Gomez Gonzalez et al. 2017), QACITS (Huby et al. 2015, 2017), Astropy (The Astropy Collaboration et al. 2018), Matplotlib (Hunter 2007), caret (Kuhn 2008), scikit-image (van der Walt et al. 2014), Mongo (https://docs.mongodb.com/).\n\nPublished - Xuan_2018_AJ_156_156.pdf
Accepted Version - 1808.05297.pdf
", "abstract": "The NIRC2 vortex coronagraph is an instrument on Keck II designed to directly image exoplanets and circumstellar disks at mid-infrared bands L' (3.4\u20134.1 \u03bcm) and M_s (4.55\u20134.8 \u03bcm). We analyze imaging data and corresponding adaptive optics telemetry, observing conditions, and other metadata over a three-year time period to characterize the performance of the instrument and predict the detection limits of future observations. We systematically process images from 359 observations of 304 unique stars to subtract residual starlight (i.e., the coronagraphic point-spread function) of the target star using two methods: angular differential imaging (ADI) and reference star differential imaging (RDI). We find that for the typical parallactic angle (PA) rotation of our data set (~10\u00b0), RDI provides gains over ADI for angular separations smaller than 0farcs25. Furthermore, we find a power-law relation between the angular separation from the host star and the minimum PA rotation required for ADI to outperform RDI, with a power-law index of \u22121.18 \u00b1 0.08. Finally, we use random forest models to estimate ADI and RDI post-processed detection limits a priori. These models, which we provide publicly on a website, explain 70%\u201380% of the variance in ADI detection limits and 30%\u201350% of the variance in RDI detection limits. Averaged over a range of angular separations, our models predict both ADI and RDI contrast to within a factor of 2. These results illuminate important factors in high-contrast imaging observations with the NIRC2 vortex coronagraph, help improve observing strategies, and inform future upgrades to the hardware.", "date": "2018-10", "date_type": "published", "publication": "Astronomical Journal", "volume": "156", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 156", "id_number": "CaltechAUTHORS:20180914-100923902", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180914-100923902", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/aadae6", "primary_object": { "basename": "1808.05297.pdf", "url": "https://authors.library.caltech.edu/records/75sbs-2z649/files/1808.05297.pdf" }, "related_objects": [ { "basename": "Xuan_2018_AJ_156_156.pdf", "url": "https://authors.library.caltech.edu/records/75sbs-2z649/files/Xuan_2018_AJ_156_156.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Xuan, W. Jerry; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/355ky-nvq88", "eprint_id": 88293, "eprint_status": "archive", "datestamp": "2023-08-19 11:26:28", "lastmod": "2023-10-18 21:56:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Guidi-G-M", "name": { "family": "Guidi", "given": "G." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Williams-J-P", "name": { "family": "Williams", "given": "J. P." }, "orcid": "0000-0001-5058-695X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Testi-L", "name": { "family": "Testi", "given": "L." }, "orcid": "0000-0003-1859-3070" }, { "id": "Zurlo-A", "name": { "family": "Zurlo", "given": "A." }, "orcid": "0000-0002-5903-8316" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda-Castell\u00e1", "given": "B." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Isella-A", "name": { "family": "Isella", "given": "A." }, "orcid": "0000-0001-8061-2207" }, { "id": "Kastner-J-H", "name": { "family": "Kastner", "given": "J." }, "orcid": "0000-0002-3138-8250" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "T." }, "orcid": "0000-0001-6126-2467" }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "M." }, "orcid": "0000-0003-2911-0898" }, { "id": "Riggs-A", "name": { "family": "Riggs", "given": "A." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Wallack-N-L", "name": { "family": "Wallack", "given": "N." }, "orcid": "0000-0003-0354-0187" } ] }, "title": "High-contrast imaging of HD 163296 with the Keck/NIRC2 L\u2032-band vortex coronograph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 protoplanetary discs \u2013 stars: individual: HD 163296 \u2013 stars: pre-main-sequence \u2013 infrared: planetary systems", "note": "\u00a9 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices). \n\nAccepted 2018 June 15. Received 2018 June 14; in original form 2018 February 27. Published: 22 June 2018. \n\nGR is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Part of this work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under contract with NASA. JPW was supported by NASA grant NNX15AC92G. JHK acknowledges support from NASA Exoplanets programme grant NNX16AB43G to RIT. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement no. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. EC acknowledges support from NASA through Hubble Fellowship grant HF2-51355 awarded by STScI, which is operated by AURA, Inc. for NASA under contract NAS5-26555, for research carried out at the Jet Propulsion Laboratory, California Institute of Technology. This work used archival data from HST programme GO-10177 (PI: G. Schneider), which were obtained from the Mikulski Archive for Space Telescopes (MAST) at STScI, as well as data reprocessed as part of the ALICE program, which was supported by NASA through grants HST-AR-12652 (PI: R. Soummer), HST-GO-11136 (PI: D. Golimowski), HST-GO-13855 (PI: E. Choquet), HST-GO-13331 (PI: L. Pueyo), and STScI Director's Discretionary Research funds. AZ acknowledges support from the CONICYT + PAI/ Convocatoria nacional subvenci\u00f3n a la instalaci\u00f3n en la academia, convocatoria 2017 + Folio PAI77170087. This work was partly supported by the Italian Ministero dell'Istruzione, Universit\u00e0 e Ricerca through the grant Progetti Premiali 2012 \u2013 iALMA (CUP C52I13000140001), by the Deutsche Forschungs-gemeinschaft (DFG, German Research Foundation) - Ref no. FOR 2634/1 TE 1024/1-1, and by the DFG cluster of excellence Origin and Structure of the Universe (www.universe-cluster.de).\n\nPublished - sty1642.pdf
", "abstract": "We present observations of the nearby (D\u223c100\u2009pc) Herbig star HD 163296 taken with the vortex coronograph at Keck/NIRC2 in the L\u2032 band (3.7 \u03bcm) to search for planetary mass companions in the ringed disc surrounding this pre-main-sequence star. The images reveal an arc-like region of scattered light from the disc surface layers that is likely associated with the first bright ring detected with ALMA in the \u03bb = 1.3\u2009mm dust continuum at \u223c65 au. We also detect a point-like source at \u223c0.5\u2009arcsec projected separation in the north-east direction, close to the inner edge of the second gap in the millimetre images. Comparing the point source photometry with the atmospheric emission models of non-accreting giant planets, we obtain a mass of 6\u20137 M_J for a putative protoplanet, assuming a system age of 5 Myr. Based on the contrast at a 95\u2009per\u2009cent level of completeness calculated on the emission-free regions of our images, we set upper limits for the masses of giant planets of 8\u201315 M_J, 4.5\u20136.5 M_J, and 2.5\u20134.0 M_J at the locations of the first, second, and third gap in the millimetre dust continuum, respectively. Further deep, high-resolution thermal IR imaging of the HD 163296 system are warranted to confirm the presence and nature of the point source and to better understand the structure of the dust disc.", "date": "2018-09-11", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "479", "number": "2", "publisher": "Royal Astronomical Society", "pagerange": "1505-1513", "id_number": "CaltechAUTHORS:20180726-075612565", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180726-075612565", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "NNX15AC92G" }, { "agency": "NASA", "grant_number": "NNX16AB43G" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "French Community of Belgium" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "HST-AR-12652" }, { "agency": "NASA", "grant_number": "HST-GO-11136" }, { "agency": "NASA", "grant_number": "HST-GO-13855" }, { "agency": "NASA", "grant_number": "HST-GO-13331" }, { "agency": "Space Telescope Science Institute" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "PAI77170087" }, { "agency": "Ministero dell'Istruzione, Universit\u00e0 e Ricerca (MIUR)", "grant_number": "CUP C52I13000140001" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "FOR 2634/1 TE 1024/1-1" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.1093/mnras/sty1642", "primary_object": { "basename": "sty1642.pdf", "url": "https://authors.library.caltech.edu/records/355ky-nvq88/files/sty1642.pdf" }, "resource_type": "article", "pub_year": "2018", "author_list": "Guidi, G.; Ruane, G.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/043gn-48605", "eprint_id": 90160, "eprint_status": "archive", "datestamp": "2023-08-19 11:18:56", "lastmod": "2023-10-18 23:15:00", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Casassus-S", "name": { "family": "Casassus", "given": "S." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Kimeswenger-S", "name": { "family": "Kimeswenger", "given": "S." }, "orcid": "0000-0003-2379-0474" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C. A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Girard-J", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Ram\u00edrez-R", "name": { "family": "Ram\u00edrez", "given": "R." } }, { "id": "Wertz-O", "name": { "family": "Wertz", "given": "O." }, "orcid": "0000-0003-3849-2285" }, { "id": "Zurlo-A", "name": { "family": "Zurlo", "given": "A." }, "orcid": "0000-0002-5903-8316" }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" }, { "id": "Flores-C", "name": { "family": "Flores", "given": "C." }, "orcid": "0000-0002-8591-472X" }, { "id": "Salinas-V-N", "name": { "family": "Salinas", "given": "V." } }, { "id": "Jord\u00e1n-Andr\u00e9s", "name": { "family": "Jord\u00e1n", "given": "A." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Characterization of low-mass companion HD\u00a0142527 B", "ispublished": "pub", "full_text_status": "public", "keywords": "protoplanetary disks \u2013 stars: individual: HD 142527 \u2013 stars: low-mass \u2013 binaries: close \u2013 stars: pre-main sequence", "note": "\u00a9 2018 ESO. Article published by EDP Sciences. \n\nReceived 1 August 2016; Accepted 12 June 2018; Published online 18 September 2018. \n\nBased on observations made with ESO Telescopes at the Paranal Observatory under program ID 084.C-0952 and 093.C-0526. \n\nWe acknowledge the anonymous referee for his/her constructive comments. We are grateful to the VLT/SINFONI telescope staff (Kora Muzic and Ivan Aranda) for their precious help during the observing run. We thank Micka\u00ebl Bonnefoy, Jackie Faherty, Gregory Herczeg, Sylvestre Lacour and Gerrit van der Plas for useful discussions. We are also thankful to Ignacio Mendigut\u00eda for sharing the X-shooter spectrum of HD 142527. VC acknowledges support from CONICYT through CONICYT-PCHA/Doctorado Nacional/2016-21161112. VC and SC acknowledge support by the Millennium Science Initiative (Chilean Ministry of Economy), through grant RC130007. VC, OA, CGG and OW acknowledge support from the European Research Council under the European Union's Seventh Framework Program (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action. AZ acknowledges support from the CONICYT + PAI/ Convocatoria nacional subvenci\u00f3n a la instalaci\u00f3n en la academia, convocatoria 2017 + Folio PAI77170087 This research has benefitted from the SpeX Prism Library (and/or SpeX Prism Library Analysis Toolkit), maintained by Adam Burgasser at http://www.browndwarfs.org/spexprism.\n\nPublished - aa29454-16.pdf
Accepted Version - 1806.04792.pdf
", "abstract": "Context. The circumstellar disk of the Herbig Fe star HD 142527 is host to several remarkable features including a warped inner disk, a 120 au-wide annular gap, a prominent dust trap and several spiral arms. A low-mass companion, HD 142527 B, was also found orbiting the primary star at ~14 au.\nAims. This study aims to better characterize this companion, which could help explain its impact on the peculiar geometry of the disk.\nMethod. We observed the source with VLT/SINFONI in H + K band in pupil-tracking mode. Data were post-processed with several algorithms based on angular differential imaging (ADI).\nResults. HD 142527 B is conspicuously re-detected in most spectral channels, which enables us to extract the first medium-resolution spectrum of a low-mass companion within 0.\u20331 from its central star. Fitting our spectrum with both template and synthetic spectra suggests that the companion is a young M2.5 \u00b1 1.0 star with an effective temperature of 3500 \u00b1 100 K, possibly surrounded with a hot (1700 K) circum-secondary environment. Pre-main sequence evolutionary tracks provide a mass estimate of 0.34 \u00b1 0.06 M\u2299, independent of the presence of a hot environment. However, the estimated stellar radius and age do depend on that assumption; we find a radius of 1.37 \u00b1 0.05 R\u2299 (resp. 1.96 \u00b1 0.10 R\u2299) and an age of 1.8_(-0.5)^(+1.2) Myr (resp. 0.75 \u00b1 0.25 Myr) in the case of the presence (resp. absence) of a hot environment contributing in H + K. Our new values for the mass and radius of the companion yield a mass accretion rate of 4.1\u20135.8\u00d710^(\u22129) M\u2299 yr^(\u22121) (2\u20133% that of the primary).\nConclusions. We have constrained the physical properties of HD 142527 B, thereby illustrating the potential for SINFONI+ADI to characterize faint close-in companions. The new spectral type makes HD 142527 B a twin of the well-known TW Hya T Tauri star, and the revision of its mass to higher values further supports its role in shaping the disk.", "date": "2018-09", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "617", "publisher": "EDP Sciences", "pagerange": "Art. No. A37", "id_number": "CaltechAUTHORS:20181008-143055163", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181008-143055163", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "2016-21161112" }, { "agency": "Millennium Nucleus", "grant_number": "RC130007" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "F\u00e9d\u00e9ration Wallonie-Bruxelles" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "PAI77170087" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201629454", "primary_object": { "basename": "1806.04792.pdf", "url": "https://authors.library.caltech.edu/records/043gn-48605/files/1806.04792.pdf" }, "related_objects": [ { "basename": "aa29454-16.pdf", "url": "https://authors.library.caltech.edu/records/043gn-48605/files/aa29454-16.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Christiaens, V.; Casassus, S.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/388yr-p7m84", "eprint_id": 88140, "eprint_status": "archive", "datestamp": "2023-08-19 11:08:45", "lastmod": "2024-01-14 20:29:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Riggs-A-D", "name": { "family": "Riggs", "given": "A." } }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "C. T." }, "orcid": "0000-0002-9954-7887" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "S. B." } }, { "id": "Sidick-E", "name": { "family": "Sidick", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "J." } }, { "id": "Balasubramanian-K", "name": { "family": "Balasubramanian", "given": "K." } }, { "id": "Stark-C-C", "name": { "family": "Stark", "given": "C. C." } } ] }, "title": "Fast Linearized Coronagraph Optimizer (FALCO) IV. Coronagraph design survey for obstructed and segmented apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nG. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 106984U.pdf
Submitted - 1807.06758.pdf
", "abstract": "Coronagraph instruments on future space telescopes will enable the direct detection and characterization of Earth-like exoplanets around Sun-like stars for the first time. The quest for the optimal optical coronagraph designs has made rapid progress in recent years thanks to the Segmented Coronagraph Design and Analysis (SCDA) initiative led by the Exoplanet Exploration Program at NASA's Jet Propulsion Laboratory. As a result, several types of high-performance designs have emerged that make use of dual deformable mirrors to (1) correct for optical aberrations and (2) suppress diffracted starlight from obstructions and discontinuities in the telescope pupil. However, the algorithms used to compute the optimal deformable mirror surface tend to be computationally intensive, prohibiting large scale design surveys. Here, we utilize the Fast Linearized Coronagraph Optimizer (FALCO), a tool that allows for rapid optimization of deformable mirror shapes, to explore trade-offs in coronagraph designs for obstructed and segmented space telescopes. We compare designs for representative shaped pupil Lyot and vortex coronagraphs, two of the most promising concepts for the LUVOIR space mission concept. We analyze the optical performance of each design, including their throughput and ability to passively suppress light from partially resolved stars in the presence of low-order aberrations. Our main result is that deformable mirror based apodization can suffciently suppress diffraction from support struts and inter-segment gaps whose widths are on the order of ~0.1% of the primary mirror diameter to detect Earth-sized planets within a few tens of milliarcseconds from the star.", "date": "2018-08-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106984U", "id_number": "CaltechAUTHORS:20180723-152618824", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-152618824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312973", "primary_object": { "basename": "106984U.pdf", "url": "https://authors.library.caltech.edu/records/388yr-p7m84/files/106984U.pdf" }, "related_objects": [ { "basename": "1807.06758.pdf", "url": "https://authors.library.caltech.edu/records/388yr-p7m84/files/1807.06758.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Ruane, G.; Riggs, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/phjcv-deb15", "eprint_id": 91551, "eprint_status": "archive", "datestamp": "2023-08-19 11:10:23", "lastmod": "2024-01-14 21:15:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Rud-M", "name": { "family": "Rud", "given": "Mayer" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nissen-J-A", "name": { "family": "Nissen", "given": "Joel" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Marchen-L-F", "name": { "family": "Marchen", "given": "Luis" } } ] }, "title": "HabEx space telescope exoplanet instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, space telescope", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe information in this paper on the HabEx concept is provided prior to any decisions or commitments being made and is provided for planning and discussion purposes only. This work was conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Copyright 2018 California Institute of Technology. Government sponsorship acknowledged. All rights reserved. URS#274214.\n\nPublished - 106980T.pdf
", "abstract": "The HabEx (Habitable Exoplanet) space telescope mission concept carries two complementary optical systems as part of its baseline design, a coronagraph and a starshade, that are designed to detect and characterize planetary systems around nearby stars. The starshade is an external occulter which would be 72 m in diameter and fly some 124,000 km ahead of the telescope. A starshade instrument on board the telescope enables formation flying to maintain the starshade within 1 m of the line of sight to the star. The starshade instrument has various modes, including imaging from the near UV through to the near infrared and integral field spectroscopy in the visible band. The coronagraph would provide imaging and integral field spectroscopy in the visible band and would reach out to 1800 nm for low resolution spectroscopy in the near infrared. To provide the necessary stability for the coronagraph, the telescope would be equipped with a laser metrology system allowing measurement and control of the relative positions of the principal mirrors. In addition, a fine guidance sensor is needed for precision attitude control. The requirements for telescope stability for coronagraphy are discussed. The design and requirements on the starshade will also be discussed.", "date": "2018-08-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980T", "id_number": "CaltechAUTHORS:20181207-083716033", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181207-083716033", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2314410", "primary_object": { "basename": "106980T.pdf", "url": "https://authors.library.caltech.edu/records/phjcv-deb15/files/106980T.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Martin, Stefan; Rud, Mayer; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hpsq3-a9k09", "eprint_id": 91555, "eprint_status": "archive", "datestamp": "2023-08-19 10:58:06", "lastmod": "2024-01-14 21:16:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gaudi-B-S", "name": { "family": "Gaudi", "given": "B. Scott" }, "orcid": "0000-0003-0395-9869" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Seager-S", "name": { "family": "Seager", "given": "Sara" }, "orcid": "0000-0002-6892-6948" }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri" } }, { "id": "Clarke-J-T", "name": { "family": "Clarke", "given": "John" } }, { "id": "Domagal-Goldman-S", "name": { "family": "Domagal-Goldman", "given": "Shawn" } }, { "id": "Feinberg-L", "name": { "family": "Feinberg", "given": "Lee" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Kasdin-J", "name": { "family": "Kasdin", "given": "Jeremy" } }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Prusti-T", "name": { "family": "Prusti", "given": "Timo" } }, { "id": "Quirrenbach-A", "name": { "family": "Quirrenbach", "given": "Andreas" } }, { "id": "Robinson-T-D", "name": { "family": "Robinson", "given": "Tyler" } }, { "id": "Rogers-L-A", "name": { "family": "Rogers", "given": "Leslie" }, "orcid": "0000-0003-0638-3455" }, { "id": "Scowen-P-A", "name": { "family": "Scowen", "given": "Paul" } }, { "id": "Somerville-R-S", "name": { "family": "Somerville", "given": "Rachel" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stark-C", "name": { "family": "Stark", "given": "Christopher" } }, { "id": "Stern-D", "name": { "family": "Stern", "given": "Daniel" }, "orcid": "0000-0003-2686-9241" }, { "id": "Still-M", "name": { "family": "Still", "given": "Martin" } }, { "id": "Turnbull-M-C", "name": { "family": "Turnbull", "given": "Margaret" } }, { "id": "Booth-J", "name": { "family": "Booth", "given": "Jeffrey" } }, { "id": "Kiessling-A", "name": { "family": "Kiessling", "given": "Alina" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } } ] }, "title": "Habitable Exoplanet Observatory (HabEx)", "ispublished": "unpub", "full_text_status": "public", "keywords": "decadal, exoplanets, biosignatures, high contrast imaging, galaxy formation and evolution, coronagraph, starshade", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 106980P.pdf
", "abstract": "The Habitable-Exoplanet Observatory (HabEx) is a candidate flagship mission being studied by NASA and the astrophysics community in preparation of the 2020 Decadal Survey. The first HabEx mission concept that has been studied is a large (~4m) diffraction-limited optical space telescope, providing unprecedented resolution and contrast in the optical, with extensions into the near ulttraviolet and near infrared domains. We report here on our team's efforts in defining a scientifically compelling HabEx mission that is technologically executable, affordable within NASA's expected budgetary envelope, and timely for the next decade. We also briefly discuss our plans to explore less ambitious, descoped missions relative to the primary mission architecture discussed here.", "date": "2018-08-01", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980P", "id_number": "CaltechAUTHORS:20181207-083716481", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181207-083716481", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312278", "primary_object": { "basename": "106980P.pdf", "url": "https://authors.library.caltech.edu/records/hpsq3-a9k09/files/106980P.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Gaudi, B. Scott; Mennesson, Bertrand; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kmh23-nt253", "eprint_id": 88430, "eprint_status": "archive", "datestamp": "2023-08-19 10:42:43", "lastmod": "2023-10-18 22:03:17", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gaudi-B-S", "name": { "family": "Gaudi", "given": "B. Scott" }, "orcid": "0000-0003-0395-9869" }, { "id": "Seager-S", "name": { "family": "Seager", "given": "Sara" }, "orcid": "0000-0002-6892-6948" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Kiessling-A", "name": { "family": "Kiessling", "given": "Alina" } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The Habitable Exoplanet Observatory", "ispublished": "pub", "full_text_status": "restricted", "note": "\u00a9 2018 Springer Nature Limited. \n\nPublished 01 August 2018.", "abstract": "The Habitable Exoplanet Observatory (HabEx) is a conceptual space-based 4-m telescope with the means to image and characterize potentially habitable planets orbiting Sun-like stars, and with ultraviolet to near-infrared imaging and spectroscopic capabilities suited to general observatory science.", "date": "2018-08", "date_type": "published", "publication": "Nature Astronomy", "volume": "2", "number": "8", "publisher": "Nature Publishing Group", "pagerange": "600-604", "id_number": "CaltechAUTHORS:20180801-092836524", "issn": "2397-3366", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180801-092836524", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1038/s41550-018-0549-2", "resource_type": "article", "pub_year": "2018", "author_list": "Gaudi, B. Scott; Seager, Sara; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/74jre-h4r65", "eprint_id": 92051, "eprint_status": "archive", "datestamp": "2023-08-19 10:29:15", "lastmod": "2024-01-14 21:24:12", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } } ] }, "title": "Demonstration of a speckle nulling algorithm and Kalman filter estimator with a fiber injection unit for observing exoplanets with high-dispersion coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, fiber injection unit, speckle nulling, Kalman filter, spectrograph, exoplanet characterization", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nhe authors would like to acknowledge the financial support of the Caltech Student Faculty Program (SFP) office and the Jean Dixon SURF Fellowship.\n\nPublished - 107036Z.pdf
", "abstract": "High-dispersion coronagraphy (HDC) combines high contrast imaging techniques with high spectral resolution spectroscopy to observe exoplanets and determine characteristics such as chemical composition, temperature, and rotational velocities. It has been demonstrated in lab that with monochromatic light, a fiber injection unit (FIU), in which an optical fiber is used to couple to light from the exoplanet, could be used to direct exoplanet light to a high-resolution spectrograph, with robust performance and speckle suppression that exceeds conventional image-based speckle nulling. We now demonstrate in lab a FIU based speckle nulling scheme with a Kalman filter estimator. We currently find that speckle nulling with a Kalman filter is more stable and outperforms traditional speckle nulling by 10% in suppression in the presence of white detector noise.", "date": "2018-07-18", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107036Z", "id_number": "CaltechAUTHORS:20190103-153503823", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-153503823", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Caltech Summer Undergraduate Research Fellowship (SURF)" }, { "agency": "Jean Dixon SURF Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312357", "primary_object": { "basename": "107036Z.pdf", "url": "https://authors.library.caltech.edu/records/74jre-h4r65/files/107036Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Xin, Yeyuan; Llop Sayson, Jorge; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h995s-zfb19", "eprint_id": 92138, "eprint_status": "archive", "datestamp": "2023-08-19 10:29:20", "lastmod": "2024-01-14 21:24:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M", "name": { "family": "Fitzgerald", "given": "M." } } ] }, "title": "First version of the fiber injection unit for the Keck Planet Imager and Characterizer", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391.\n\nPublished - 107033B.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500 after upgrade) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module was integrated at Caltech and shipped to Hawaii at the beginning of 2018 and is currently undergoing characterization. Its transfer to Keck is planned in September and first on-sky tests sometime in December.", "date": "2018-07-18", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107033B", "id_number": "CaltechAUTHORS:20190108-112614029", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190108-112614029", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313774", "primary_object": { "basename": "107033B.pdf", "url": "https://authors.library.caltech.edu/records/h995s-zfb19/files/107033B.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0t17n-qas82", "eprint_id": 87815, "eprint_status": "archive", "datestamp": "2023-08-19 10:28:51", "lastmod": "2024-01-14 20:24:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared" } } ] }, "title": "Wavefront control architecture and expected performance for the TMT planetary systems imager", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, High Contrast Imaging, Adaptive Optics, Coronagraphy", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe author acknowledges funding support from the Japanese Society for the Promotion of Sciences (JSPS), the Japanese Astrobiology Center, National Institutes for Natural Sciences (ABC/NINS). The authors acknowledge support from the JSPS (Grant-in-Aid for Research 23340051 and 26220704). The authors wish to acknowledge the Center for Adaptive Optics Fall Retreat and the TMT Science Forum, where much of this work originated.\n\nPublished - 107030Z.pdf
", "abstract": "The Planetary Systems Imager (PSI) is a modular instrument optimized for direct imaging and characterization of exoplanet and disks with the Thirty Meter Telescope (TMT). PSI will operate across a wide wavelength range (\u22480.6 - 5\u03bcm) to image exoplanets and circumstellar disks in both reflected light and thermal emission. Thanks to the TMT's large collecting area, PSI will have the sensitivity to directly image and spectrally characterize large gaseous planets with unprecedented sensitivity. PSI will also be capable of imaging rocky planets in the habitable zones of the nearest M-type stars in reflected light and search for biomarkers in their atmospheres. Imaging habitable planets in reflected light is PSI's most challenging goal, requiring high contrast imaging (HCI) capabilities well beyond what current instruments achieve. This science goal drives PSI's wavefront sensing and control requirements and defines the corresponding architecture discussed in this paper. We show that PSI must deliver 1e-5 image contrast \u224815 mas separation at \u03bb \u2248 1\u03bcm-1.5\u03bcm, and that a conventional extreme-AO architecture relying on a single high speed wavefront sensor (WFS) is not sufficient to meet this requirement. We propose a wavefront control architecture relying on both visible light (\u03bb < 1.1 \u03bcm) sensing to optimize sensitivity, and near-IR (\u03bb > 1.1 \u03bcm) sensors to address wavefront chromaticity terms and provide high contrast imaging capability. We show that this combination will enable speckle halo suppression at the < 1e-5 raw contrast level in near-IR, allowing detection and spectroscopic characterization of potentially habitable exoplanets orbiting nearby M-type stars.", "date": "2018-07-17", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107030Z", "id_number": "CaltechAUTHORS:20180712-155553779", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-155553779", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23340051" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "26220704" }, { "agency": "National Institutes of Natural Sciences of Japan" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "corp_creators": { "items": [ "TMT-PSI Instrument Team" ] }, "doi": "10.1117/12.2314331", "primary_object": { "basename": "107030Z.pdf", "url": "https://authors.library.caltech.edu/records/0t17n-qas82/files/107030Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Guyon, Olivier; Mazin, Benjamin; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/c86ca-tnb09", "eprint_id": 91396, "eprint_status": "archive", "datestamp": "2023-08-19 10:28:20", "lastmod": "2024-01-14 21:14:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" }, { "id": "Stelter-D", "name": { "family": "Stelter", "given": "Deno" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael" }, "orcid": "0000-0002-0176-8973" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Briesemeister-Z", "name": { "family": "Briesemeister", "given": "Zackery" } }, { "id": "Brandt-T-D", "name": { "family": "Brandt", "given": "Timothy" }, "orcid": "0000-0003-2630-8073" }, { "id": "Chilcote-J-K", "name": { "family": "Chilcote", "given": "Jeffrey" }, "orcid": "0000-0001-6305-7272" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "Jessica" }, "orcid": "0000-0001-9611-0009" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "The Planetary Systems Imager: 2-5 Micron Channel", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive optics, integral field spectroscopy, exoplanet imaging, exoplanet instrumentation", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors wish to acknowledge the Center for Adaptive Optics Fall Retreat and the TMT Science Forum, where much of this work originated. This paper is based on work funded by NSF Grants 1608834 and 1614320.\n\nPublished - 10702A5.pdf
Submitted - 1808.03304.pdf
", "abstract": "We summarize the red channel (2-5 micron) of the Planetary Systems Imager (PSI), a proposed second-generation instrument for the TMT. Cold exoplanets emit the majority of their light in the thermal infrared, which means these exoplanets can be detected at a more modest contrast than at other wavelengths. PSI-Red will be able to detect and characterize a wide variety of exoplanets, including radial-velocity planets on wide orbits, accreting protoplanets in nearby star-forming regions, and reflected-light planets around the nearest stars. PSI-Red will feature an imager, a low-resolution lenslet integral field spectrograph, a medium-resolution lenslet+slicer integral field spectrograph, and a fiber-fed high-resolution spectrograph.", "date": "2018-07-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 10702A5", "id_number": "CaltechAUTHORS:20181203-101750008", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181203-101750008", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1608834" }, { "agency": "NSF", "grant_number": "AST-1614320" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314173", "primary_object": { "basename": "1808.03304.pdf", "url": "https://authors.library.caltech.edu/records/c86ca-tnb09/files/1808.03304.pdf" }, "related_objects": [ { "basename": "10702A5.pdf", "url": "https://authors.library.caltech.edu/records/c86ca-tnb09/files/10702A5.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Skemer, Andrew J.; Stelter, Deno; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6zg50-0bq85", "eprint_id": 98197, "eprint_status": "archive", "datestamp": "2023-08-19 10:26:21", "lastmod": "2024-01-14 21:54:30", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Optimizing optics and opto-mechanical mounting to minimize static aberrations in high-contrast instruments", "ispublished": "unpub", "full_text_status": "public", "keywords": "High Contrast Imaging, Instrumentation, Opto-Mechanical Systems", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 1070358.pdf
", "abstract": "One of the goals of high-contrast imaging is to reach contrasts of 10^(-10) at small inner working angles to directly image Earth-like exoplanets around solar-type stars. In most imaging systems, a deformable mirror (DM) in the pupil plane can correct for phase errors but surface errors in out-of-pupil optics get coupled into amplitude errors which can only be controlled with a second, out of pupil, DM. Furthermore, correcting static errors introduced by the optics can take up valuable DM stroke. Thus, minimizing the wavefront error within the system is critical to reaching high contrast levels. For example, the High Contrast Spectroscopy for Segmented Telescopes Testbed (HCST) in the Exoplanet Technologoy lab at Caltech aims to develop exoplanet imaging technologies down to small inner working angles (< 3\u03bb/D) which requires an RMS wavefront error of less than 10 nm per optic to achieve a contrast of 10^(\u22125) with the DM flattened. While aligning HCST, it was determined that despite the excellent surface quality of all the optics, the mounts were introducing significant wavefront errors. Here we assess the effect of mount-induced wavefront errors that can rapidly consume the wavefront budget of a high-contrast system. We also present the method used to mitigate this effect within HCST such that a mean contrast of 6 \u00d7 10^(-6) from 3-10\u03bb/D was achieved with a vortex coronagraph and flattened DM.", "date": "2018-07-13", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070358", "id_number": "CaltechAUTHORS:20190823-134014824", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134014824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313887", "primary_object": { "basename": "1070358.pdf", "url": "https://authors.library.caltech.edu/records/6zg50-0bq85/files/1070358.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Echeverri, D.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tdnex-7aw95", "eprint_id": 88139, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:33", "lastmod": "2024-01-14 20:29:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zhang-Manxuan", "name": { "family": "Zhang", "given": "Manxuan" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" }, "orcid": "0000-0001-5213-6207" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } } ] }, "title": "Characterization of microdot apodizers for imaging exoplanets with next-generation space telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nG. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 106985X.pdf
Submitted - 1807.06761.pdf
", "abstract": "A major science goal of future, large-aperture, optical space telescopes is to directly image and spectroscopically analyze reflected light from potentially habitable exoplanets. To accomplish this, the optical system must suppress diffracted light from the star to reveal point sources approximately ten orders of magnitude fainter than the host star at small angular separation. Coronagraphs with microdot apodizers achieve the theoretical performance needed to image Earth-like planets with a range of possible telescope designs, including those with obscured and segmented pupils. A test microdot apodizer with various bulk patterns (step functions, gradients, and sinusoids) and 4 different dot sizes (3 \u03bcm, 5 \u03bcm, 7 \u03bcm, and 10 \u03bcm) made of small chrome squares on anti-reflective glass was characterized with microscopy, optical laser interferometry, as well as transmission and reflectance measurements at wavelengths \u03bb=600 nm and \u03bb=800 nm. Microscopy revealed the microdots were fabricated to high precision. Results from laser interferometry showed that the phase shifts observed in reflection vary with the local microdot fill factor. This effect is not explained purely by interference between reflected fields from the chrome and glass portions. Transmission measurements showed that microdot fill factor and transmission were linearly related for dot sizes \u22655 \u03bcm. However, anomalously high transmittance was measured when the dot size is <5\u00d7 the wavelength (i.e. \u223c3 \u03bcm) and the fill factor is approximately 50%, where the microdot pattern becomes periodic. The transmission excess is not as prominent in the case of larger dot sizes suggesting that it is likely to be caused by the interaction between the incident field and electronic resonances in the surface of the metallic microdots. We used our empirical models of the microdot apodizers to optimize a second generation of reflective apodizer designs, specifically for demonstrating end-to-end instrumentation for planet characterization at Caltech's High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST), and confirmed that the amplitude and phase of the reflected beam closely matches the ideal wavefront.", "date": "2018-07-12", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106985X", "id_number": "CaltechAUTHORS:20180723-152238522", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-152238522", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312831", "primary_object": { "basename": "106985X.pdf", "url": "https://authors.library.caltech.edu/records/tdnex-7aw95/files/106985X.pdf" }, "related_objects": [ { "basename": "1807.06761.pdf", "url": "https://authors.library.caltech.edu/records/tdnex-7aw95/files/1807.06761.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Zhang, Manxuan; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8mkt8-fxz40", "eprint_id": 92164, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:43", "lastmod": "2024-01-14 21:25:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita" } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Yeyuan" } } ] }, "title": "Wavefront control for minimization of speckle coupling into a fiber injection unit based on the electric field conjugation algorithm", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Wavefront control, Wavefront sensing, Fiber injection unit, Electric Field\nConjugation", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 1070372.pdf
", "abstract": "A fiber injection unit situated in the focal plane behind a coronagraph feeding a high resolution spectrograph can be used to couple light from an exoplanet to obtain high resolution spectra with improved sensitivity. However, the signal-to-noise ratio of the planet signal is limited by the coupling of starlight into the single mode fiber. To minimize this coupling, we need to apply a control loop on the stellar wavefront at the input of the fiber. We present here a wavefront control algorithm based on the formalism of the Electric Field Conjugation (EFC) controller that accounts for the effect of the fiber. The control output is the overlap integral of the electric field with the fundamental mode of a single mode fiber. This overlap integral is estimated by sending probes to a deformable mirror. We present results from simulations, and laboratory results obtained at the Caltech Exoplanet Technology Lab's transmissive testbed. We show that our approach offers a significant improvement in starlight suppression through the fiber relative to a conventional EFC controller. This new approach improves the contrast of a high contrast instrument and could be used in future missions.", "date": "2018-07-12", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070372", "id_number": "CaltechAUTHORS:20190109-105316778", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190109-105316778", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2313657", "primary_object": { "basename": "1070372.pdf", "url": "https://authors.library.caltech.edu/records/8mkt8-fxz40/files/1070372.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Llop Sayson, Jorge; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ggn18-x8k73", "eprint_id": 87813, "eprint_status": "archive", "datestamp": "2023-08-19 10:24:56", "lastmod": "2024-01-14 20:24:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte" } }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Lockhart-C", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Goebel-S", "name": { "family": "Goebel", "given": "Sean" } }, { "id": "Wetherell-E", "name": { "family": "Wetherell", "given": "Ed" } } ] }, "title": "A near-infrared pyramid wavefront sensor for Keck adaptive optics: real-time controller", "ispublished": "unpub", "full_text_status": "public", "keywords": "Real-Time Control, Pyramid Wavefront Sensor, Adaptive Optics", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared PWS is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. ASF-1106391. We would like to acknowledge the technical contributions of Kevin Tsubota, Sam Ragland, Jason Chin, Jon Chock at WMKO, Eric Warmbier at IfA, Nemamja Jovanovic, Jacques-Robert Delorme at Caltech, the SCExAO team at Subaru and Frantz Martinache at Observatoire de la Cote d'Azur. Finally, we would like to thank Accelerate Diagnostics for providing the first GPU used in the RTC. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 1070339.pdf
", "abstract": "A new real-time control system will be implemented within the Keck II adaptive optics system to support the new near-infrared pyramid wavefront sensor. The new real-time computer has to interface with an existing, very productive adaptive optics system. We discuss our solution to install it in an operational environment without impacting science. This solution is based on an independent SCExAO-based pyramid wavefront sensor realtime processor solution using the hardware interfaces provided by the existing Keck II real-time controller. We introduce the new pyramid real-time controller system design, its expected performance, and the modification of the operational real-time controller to support the pyramid system including interfacing with the existing deformable and tip-tilt mirrors. We describe the integration of the Saphira detector-based camera and the Boston Micromachines kilo-DM in this new architecture. We explain the software architecture and philosophy, the shared memory concept and how the real-time computer uses the power of GPUs for adaptive optics control. We discuss the strengths and weaknesses of this architecture and how it can benefit other projects. The motion control of the devices deployed on the Keck II adaptive optics bench to support the alignment of the light on the sensors is also described. The interfaces, developed to deal with the rest of the Keck telescope systems in the observatory distributed system, are reviewed. Based on this experience, we present which design ideas could have helped us integrate the new system with the previous one and the resultant performance gains.", "date": "2018-07-11", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070339", "id_number": "CaltechAUTHORS:20180712-154055689", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-154055689", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2311781", "primary_object": { "basename": "1070339.pdf", "url": "https://authors.library.caltech.edu/records/ggn18-x8k73/files/1070339.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Cetre, Sylvain; Guyon, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wnh24-mnm20", "eprint_id": 87814, "eprint_status": "archive", "datestamp": "2023-08-19 10:25:01", "lastmod": "2024-01-14 20:24:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott J." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Bond-C-Z", "name": { "family": "Cond", "given": "Charlotte Z." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "Shane M." } }, { "id": "Taheri-Mojtaba", "name": { "family": "Taheri", "given": "Mojtaba" } }, { "id": "Vandenberg-A", "name": { "family": "Vandenberg", "given": "Adam" } } ] }, "title": "Near-infrared pyramid wavefront sensor for Keck adaptive optics: opto-mechanical design", "ispublished": "unpub", "full_text_status": "public", "keywords": "AO, KPIC, near-infrared pyramid wavefront sensor", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain\n\nPublished - 107033G.pdf
", "abstract": "A near-infrared, high order pyramid wavefront sensor will be implemented on the Keck telescope, with the aim of providing high resolution adaptive optics correction for the study of exoplanets around M-type stars and planet formation in obscured star forming regions. The pyramid wavefront sensor is designed to support adaptive optics correction of the light to an imaging vortex coronagraph and to a fiber injection unit that will feed a spectrograph. We present the opto-mechanical design of the near-infrared pyramid wavefront sensor, the optical performance, and the alignment strategy. The challenges of designing the assembly, as well as a fiber injection unit, to fit into the limited available space on the Keck adaptive optics bench, will also be discussed.", "date": "2018-07-11", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107033G", "id_number": "CaltechAUTHORS:20180712-154840322", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-154840322", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312838", "primary_object": { "basename": "107033G.pdf", "url": "https://authors.library.caltech.edu/records/wnh24-mnm20/files/107033G.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Lilley, Scott J.; Wizinowich, Peter; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z2qjj-q1c82", "eprint_id": 98184, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:15", "lastmod": "2024-01-14 21:54:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "Charlotte Z." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Wetherell-E", "name": { "family": "Wetherell", "given": "Edward" } }, { "id": "Jacobson-S-M", "name": { "family": "Jacobson", "given": "Shane" } }, { "id": "Lockhart-C", "name": { "family": "Lockhart", "given": "Charles" } }, { "id": "Warmbier-E-A", "name": { "family": "Warmbier", "given": "Eric" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "Donald N." } }, { "id": "Goebel-S-B", "name": { "family": "Goebel", "given": "Sean" }, "orcid": "0000-0003-3763-2418" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Plantet-C", "name": { "family": "Plantet", "given": "Cedric" } }, { "id": "Agapito-G", "name": { "family": "Agapito", "given": "Guido" } }, { "id": "Giordano-C", "name": { "family": "Giordano", "given": "Christophe" } }, { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda-Castella", "given": "Bruno" } } ] }, "title": "Adaptive optics with an infrared Pyramid wavefront sensor", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, adaptive optics, Pyramid wavefront sensor, infrared", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 107031Z.pdf
", "abstract": "Wavefront sensing in the infrared is highly desirable for the study of M-type stars and cool red objects, as they are sufficiently bright in the infrared to be used as the adaptive optics guide star. This aids in high contrast imaging, particularly for low mass stars where the star-to-planet brightness ratio is reduced. Here we discuss the combination of infrared detector technology with the highly sensitive Pyramid wavefront sensor (WFS) for a new generation of systems. Such sensors can extend the capabilities of current telescopes and meet the requirements for future instruments, such as those proposed for the giant segmented mirror telescopes. Here we introduce the infrared Pyramid WFS and discuss the advantages and challenges of this sensor. We present a new infrared Pyramid WFS for Keck, a key sub-system of the Keck Planet Imager and Characterizer (KPIC). The design, integration and testing is reported on, with a focus on the characterization of the SAPHIRA detector used to provide the H-band wavefront sensing. Initial results demonstrate a required effective read noise <1e^\u2013 at high gain.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031Z", "id_number": "CaltechAUTHORS:20190823-134013491", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013491", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2314121", "primary_object": { "basename": "107031Z.pdf", "url": "https://authors.library.caltech.edu/records/z2qjj-q1c82/files/107031Z.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Bond, Charlotte Z.; Wizinowich, Peter; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xtvez-s0671", "eprint_id": 87801, "eprint_status": "archive", "datestamp": "2023-08-19 10:20:55", "lastmod": "2024-01-14 20:24:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J.-R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "M." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Hall-D", "name": { "family": "Hall", "given": "D." } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" } ] }, "title": "Keck Planet Imager and Characterizer (KPIC): status update", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working angle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization, Extremely Large Telescopes", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The camera used with the pyramid wavefront sensor is provided by Don Hall with support by the National Science Foundation under Grant No. AST-1106391. The fiber injection unit is supported by the Heising-Simons Foundation. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nThis work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 1070306.pdf
", "abstract": "Here we report on the status of the The Keck Planet Imager and Characterizer (KPIC), which is an on-going series of upgrades to the W.M. Keck II adaptive optics system and instrument suite focused on exoplanet imaging and spectroscopic characterization. The KPIC infrared pyramid wavefront sensor and fiber injection unit to high-resolution infrared spectrograph NIRSPEC have been assembled, integrated and are under-going tests at the University of Hawaii before installation at the Summit in the Fall of 2018.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070306", "id_number": "CaltechAUTHORS:20180712-110818688", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-110818688", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "NSF", "grant_number": "AST-1106391" }, { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2314037", "primary_object": { "basename": "1070306.pdf", "url": "https://authors.library.caltech.edu/records/xtvez-s0671/files/1070306.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Mawet, D.; Bond, C. Z.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bpbjn-f5j75", "eprint_id": 98186, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:23", "lastmod": "2024-01-14 21:54:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "Nemanja" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge D." } }, { "id": "Zhang-Manxuan-Rebecca", "name": { "family": "Zhang", "given": "Manxuan (Rebecca)" } }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } } ] }, "title": "Laboratory testing of coronagraphs for future space telescopes on the Caltech high contrast spectroscopy testbed for segmented telescopes (HCST) (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Imaging Earth-like exoplanets with future space telescopes will require a coronagraph instrument that is capable of creating a dark zone in the starlight at the image plane that is ten orders of magnitude fainter than the off-axis image of the host star. What is more, the coronagraph must simultaneously provide a stable dark zone and high throughput over the angular separations that correspond to habitable zones around nearby Sun-like stars (~10-100 milliarcseconds). Since the pupils of most large-aperture space telescope architectures are likely to be obstructed by secondary mirrors, spider support structures, and gaps between mirror segments, the coronagraph optics must also be specially tailored to passively suppress starlight diffracted from the obstructions and discontinuities in the telescope pupil. Here, we demonstrate an apodized vortex coronagraph optimized for an off-axis segmented telescope on the new High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) at Caltech. The coronagraph consists of a microdot apodizer, a liquid crystal vortex phase mask in the focal plane, and a Lyot stop. The microdot apodizer is an AR-coated glass window with 10um gold microdots to be used in reflection around lambda=800nm. We describe the HCST optical system; the apodizer optimization, fabrication, and metrology procedures; and present end-to-end testbed results of the coronagraph coupled with a 32x32 Boston Micromachines deformable mirror for wavefront control. We aim to achieve a dark zone 10^(-7) times fainter than the simulated host star over a wavelength range of 800\u00b140nm in Spring 2018. Finally, we will outline future plans to demonstrate coronagraph concepts for centrally obscured telescopes.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106981F", "id_number": "CaltechAUTHORS:20190823-134013721", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013721", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Mackenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2312851", "resource_type": "book_section", "pub_year": "2018", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/se6m6-dvt96", "eprint_id": 87811, "eprint_status": "archive", "datestamp": "2023-08-19 10:21:11", "lastmod": "2024-01-14 20:24:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Pannetier-C", "name": { "family": "Pannetier", "given": "C." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "J.-F." } }, { "id": "Rayes-C", "name": { "family": "Reyes", "given": "C." } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Cantalloube-F", "name": { "family": "Cantalloube", "given": "F." } }, { "id": "Tristram-K-R-W", "name": { "family": "Tristram", "given": "K." } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Telle-A", "name": { "family": "Telle", "given": "A." } }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "M." }, "orcid": "0000-0002-1721-3294" } ] }, "title": "Low wind effect on VLT/SPHERE: impact, mitigation strategy, and results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Low Wind Effect, SPHERE, Radiative Cooling, Spiders, Island Effect", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nJ.M. thanks ESO staff and technical operators at the Paranal Observatory, especially the System & Optics team for their work to apply the low-emissivity coating on the telescope spiders, and the Software team to allow to use an early release of the ESO Data Lab24 for the statistical analysis presented in this paper. He thanks W. Brandner for providing him VLTI data during a night with low wind, to evaluate the symmetry of the PSF on all 4 UTs. He thanks V. Bailey, B. Macintosh, G. Perez, M. Boccas, P. Wizinowich, J. Males, L. Close, J. Lozi and S. Vievard for providing information on the LWE and spiders properties on Gemini South, Magellan, Keck and Subaru telescopes respectively. He thanks P. Figueira for interesting discussion on statistical estimators of the LWE occurence rate. Last but not least, he thanks J. Smoker for his careful english language editing. This research has made use of the following python packages: matplotlib, pandas, scipy and astropy.\n\nPublished - 107032A.pdf
", "abstract": "The low wind effect is a phenomenon disturbing the phase of the wavefront in the pupil of a large telescope obstructed by spiders, in the absence of wind. It can be explained by the radiative cooling of the spiders, creating air temperature inhomogeneities across the pupil. Because it is unseen by traditional adaptive optics (AO) systems, thus uncorrected, it significantly degrades the quality of AO-corrected images. We provide a statistical analysis of the strength of this effect as seen by VLT/SPHERE after 4 years of operations. We analyse its dependence upon the wind and temperature conditions. We describe the mitigation strategy implemented in 2017: a specific coating with low thermal emissivity in the mid-infrared was applied on the spiders of Unit Telescope 3. We quantify the improvement in terms of image quality, contrast and wave front error using both focal plane images and measured phase maps.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107032A", "id_number": "CaltechAUTHORS:20180712-135345877", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-135345877", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2311499", "primary_object": { "basename": "107032A.pdf", "url": "https://authors.library.caltech.edu/records/se6m6-dvt96/files/107032A.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Milli, J.; Kasper, M.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/f4rrd-q3r17", "eprint_id": 87812, "eprint_status": "archive", "datestamp": "2023-08-19 10:21:16", "lastmod": "2024-01-14 20:24:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rodack-A-T", "name": { "family": "Rodack", "given": "Alexander T." } }, { "id": "Males-J-R", "name": { "family": "Males", "given": "Jared R." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin A." } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Real-time estimation and correction of quasi-static aberrations in ground-based high contrast imaging systems with high frame-rates", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, Extreme adaptive optics, Active speckle control, Quasi-static speckles, Exoplanets", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was supported in part by NSF ATI Award #1710356 and by NSF MRI Award #1625441. The authors would also like to thank Dr. Richard A. Frazin for his work developing the base algorithm and his support in our endeavors.\n\nPublished - 107032N.pdf
", "abstract": "The success of ground-based, high contrast imaging for the detection of exoplanets in part depends on the ability to differentiate between quasi-static speckles caused by aberrations not corrected by adaptive optics (AO) systems, known as non-common path aberrations (NCPAs), and the planet intensity signal. Frazin (ApJ, 2013) introduced a post-processing algorithm demonstrating that simultaneous millisecond exposures in the science camera and wavefront sensor (WFS) can be used with a statistical inference procedure to determine both the series expanded NCPA coefficients and the planetary signal. We demonstrate, via simulation, that using this algorithm in a closed-loop AO system, real-time estimation and correction of the quasi-static NCPA is possible without separate deformable mirror (DM) probes. Thus the use of this technique allows for the removal of the quasi-static speckles that can be mistaken for planetary signals without the need for new optical hardware, improving the efficiency of ground-based exoplanet detection. In our simulations, we explore the behavior of the Frazin Algorithm (FA) and the dependence of its convergence to an accurate estimate on factors such as Strehl ratio, NCPA strength, and number of algorithm search basis functions. We then apply this knowledge to simulate running the algorithm in real-time in a nearly ideal setting. We then discuss adaptations that can be made to the algorithm to improve its real-time performance, and show their efficacy in simulation. A final simulation tests the technique's resilience against imperfect knowledge of the AO residual phase, motivating an analysis of the feasibility of using this technique in a real closed-loop Extreme AO system such as SCExAO or MagAO-X, in terms of computational complexity and the accuracy of the estimated quasi-static NCPA correction.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107032N", "id_number": "CaltechAUTHORS:20180712-153453502", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180712-153453502", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1710356" }, { "agency": "NSF", "grant_number": "AST-1625441" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312218", "primary_object": { "basename": "107032N.pdf", "url": "https://authors.library.caltech.edu/records/f4rrd-q3r17/files/107032N.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Rodack, Alexander T.; Males, Jared R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xxe1n-zh490", "eprint_id": 98185, "eprint_status": "archive", "datestamp": "2023-08-19 10:23:19", "lastmod": "2024-01-14 21:54:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Simulating high dispersion coronagraphy (HDC) observations for large ground-based telescopes (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Spectroscopy of exoplanets can potentially detect biomarkers in habitable planets around other stars. The high dispersion coronagraphy (HDC) technique provides a pathway to search for biomarkers in planets around M dwarfs with next-generation ground-based extremely large telescopes (ELTs). The HDC consists of a coronagraph operating behind an extreme adaptive optics (AO) system, a single-mode fiber injection unit, and a high resolution spectrometer (HRS). The coronagraph spatially filters out starlight while the HRS spectrally discriminates starlight from planet light, reaching a starlight suppression level that enables biomarker detection. I will simulating ELT HDC instrument performance as a function of wavelength, spectral resolution, starlight suppression, and planet types, considering realistic noise budget that includes speckle noise, thermal and sky background and exozodical background.", "date": "2018-07-10", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107031R", "id_number": "CaltechAUTHORS:20190823-134013622", "isbn": "9781510619593", "book_title": "Adaptive Optics Systems VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013622", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "Schreiber-L", "name": { "family": "Schreiber", "given": "Laura" } }, { "id": "Schmidt-D", "name": { "family": "Schmidt", "given": "Dirk" } } ] }, "doi": "10.1117/12.2312387", "resource_type": "book_section", "pub_year": "2018", "author_list": "Wang, Ji and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yy9gg-w9w54", "eprint_id": 98180, "eprint_status": "archive", "datestamp": "2023-08-19 10:19:42", "lastmod": "2024-01-14 21:53:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Hinz-P-M", "name": { "family": "Hinz", "given": "Philip" }, "orcid": "0000-0002-1954-4564" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "Aissa" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans-Ulrich" } }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "Matthew" }, "orcid": "0000-0002-7064-8270" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Orban-de-Xivry-G", "name": { "family": "Orban de Xivry", "given": "Gilles" }, "orcid": "0000-0002-4790-415X" }, { "id": "Pantin-E-J", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Riggs-A-J-E", "name": { "family": "Riggs", "given": "A. J. Eldorado" }, "orcid": "0000-0002-0863-6228" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } } ] }, "title": "Around the world: status and prospects with the infrared vortex coronagraph (Conference Presentation)", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).", "abstract": "Since its first light at the VLT in 2012, the Annular Groove Phase Mask (AGPM) has been used to implement vortex coronagraphy into AO-assisted infrared cameras at two additional world-leading observatories: the Keck Observatory and the LBT. In this paper, we review the status of these endeavors, and briefly highlight the main scientific results obtained so far. We explore the performance of the AGPM vortex coronagraph as a function of instrumental constraints, and identify the main limitations to the sensitivity to faint, off-axis companions in high-contrast imaging. These limitations include the AGPM itself, non-common path aberrations, as well as the data processing pipeline; we briefly describe our on-going efforts to further improve these various aspects. Based on the lessons learned from the first five years of on-sky exploitation of the AGPM, we are now preparing its implementation in a new generation of high-contrast imaging instruments. We detail the specificities of these instruments, and how they will enable the full potential of vortex coronagraphy to be unleashed in the future. In particular, we explain how the AGPM will be used to hunt for planets in the habitable zone of alpha Centauri A and B with a refurbished, AO-assisted version of the VISIR mid-infrared camera at the VLT (aka the NEAR project), and how this project paves the way towards mid-infrared coronagraphy on the ELT with the METIS instrument. We also discuss future LM-band applications of the AGPM with VLT/ERIS, ELT/METIS, and with a proposed upgrade of Keck/NIRC2, as well as future applications at shorter wavelengths, such as a possible upgrade of VLT/SPHERE with a K-band AGPM.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107020T", "id_number": "CaltechAUTHORS:20190823-134013036", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134013036", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2312783", "resource_type": "book_section", "pub_year": "2018", "author_list": "Absil, Olivier; Karlsson, Mikael; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7ccz1-1xq59", "eprint_id": 88138, "eprint_status": "archive", "datestamp": "2023-08-19 10:18:11", "lastmod": "2024-01-14 20:29:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Coker-C-T", "name": { "family": "Coker", "given": "C." }, "orcid": "0000-0002-9954-7887" }, { "id": "Delacroix-A", "name": { "family": "Delacroix", "given": "A." } }, { "id": "Levraud-N", "name": { "family": "Levraud", "given": "N." } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "Jorge" } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Riddle-R-L", "name": { "family": "Riddle", "given": "R." }, "orcid": "0000-0002-0387-370X" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "M. A." }, "orcid": "0000-0001-6205-9233" } ] }, "title": "High-contrast spectroscopy testbed for Segmented Telescopes: instrument overview and development progress", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, common path wavefront sensing, coherent differential imaging, high contrast imaging, exoplanets", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 107024E.pdf
Submitted - 1807.07020.pdf
", "abstract": "The High Contrast spectroscopy testbed for Segmented Telescopes (HCST) is being developed at Caltech. It aims at addressing the technology gap for future exoplanet imagers and providing the U.S. community with an academic facility to test components and techniques for high contrast imaging, focusing on segmented apertures proposed for future ground-based (TMT, ELT) and space-based telescopes (HabEx, LUVOIR). We present an overview of the design of the instrument and a detailed look at the testbed build and initial alignment. We offer insights into stumbling blocks encountered along the path and show that the testbed is now operational and open for business. We aim to use the testbed in the future for testing of high contrast imaging techniques and technologies with amongst with thing, a TMT-like pupil.", "date": "2018-07-09", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107024E", "id_number": "CaltechAUTHORS:20180723-151740832", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-151740832", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314325", "primary_object": { "basename": "107024E.pdf", "url": "https://authors.library.caltech.edu/records/7ccz1-1xq59/files/107024E.pdf" }, "related_objects": [ { "basename": "1807.07020.pdf", "url": "https://authors.library.caltech.edu/records/7ccz1-1xq59/files/1807.07020.pdf" } ], "resource_type": "book_section", "pub_year": "2018", "author_list": "Jovanovic, N.; Ruane, G.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pzv5v-0gv93", "eprint_id": 92173, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:24", "lastmod": "2024-01-14 21:25:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Bond-C-Z", "name": { "family": "Bond", "given": "C. Z." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Lilley-S", "name": { "family": "Lilley", "given": "S." } }, { "id": "Jacobson-S", "name": { "family": "Jacobson", "given": "S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" } ] }, "title": "First version of the fiber injection unit for the Keck Planet Imager and Characterizer", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The near-infrared pyramid wavefront sensor is supported by the National Science Foundation under Grant No. AST-1611623. The fiber injection unit is supported by the Heising-Simons Foundation. The PWS camera was provided by Don Hall as part of his National Science Foundation funding under Grant No. AST 1106391.\n\nPublished - 1070225.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500 after upgrade) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module was integrated at Caltech and shipped to Hawaii at the beginning of 2018 and is currently undergoing characterization. Its transfer to Keck is planned in September and first on-sky tests sometime in December.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070225", "id_number": "CaltechAUTHORS:20190109-125342618", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190109-125342618", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1611623" }, { "agency": "Heising-Simons Foundation" }, { "agency": "NSF", "grant_number": "AST-1106391" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2310063", "primary_object": { "basename": "1070225.pdf", "url": "https://authors.library.caltech.edu/records/pzv5v-0gv93/files/1070225.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Jovanovic, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dkxah-vz065", "eprint_id": 87993, "eprint_status": "archive", "datestamp": "2023-08-19 10:14:32", "lastmod": "2024-01-14 20:28:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kassis-M", "name": { "family": "Kassis", "given": "Marc" } }, { "id": "Chan-Dwight", "name": { "family": "Chan", "given": "Dwight" } }, { "id": "Kwok-Shui", "name": { "family": "Kwok", "given": "Shui" } }, { "id": "Krasuski-T", "name": { "family": "Krasuski", "given": "Tomas" } }, { "id": "Lyke-J-E", "name": { "family": "Lyke", "given": "James E." } }, { "id": "Ragland-S-D", "name": { "family": "Ragland", "given": "Sam" } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "Scott" } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "Sylvain" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Lewis-H-A", "name": { "family": "Lewis", "given": "Hilton A." } }, { "id": "Gomez-P", "name": { "family": "Gomez", "given": "Percy" } }, { "id": "Rizzi-L", "name": { "family": "Rizzi", "given": "Luca" }, "orcid": "0000-0003-0882-2327" }, { "id": "Larkin-J-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Do-Tuan", "name": { "family": "Do", "given": "Tuan" }, "orcid": "0000-0001-9554-6062" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andy" }, "orcid": "0000-0001-6098-3924" }, { "id": "Prochaska-J-X", "name": { "family": "Prochaska", "given": "J. Xavier" }, "orcid": "0000-0002-7738-6875" }, { "id": "Westfall-K-B", "name": { "family": "Westfall", "given": "Kyle" } }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Ben" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Martin-D-Christopher", "name": { "family": "Martin", "given": "Christopher" }, "orcid": "0000-0002-8650-1644" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "Jessica R." }, "orcid": "0000-0001-9611-0009" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark R." } } ] }, "title": "Innovations and advances in instrumentation at the W. M. Keck Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Infrared, Instrumentation, Integral Field, Laser Guide Star, Spectrograph, Telescope Control, Adaptive Optics", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE). \n\nThe data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFor the projects described in this paper, there are several sources of funding we wish to acknowledge. The development of the blue channel of KCWI is supported in part by a grant from National Science Foundation under Scientific Program Order No. 5 as issued for support of the Telescope Systems Instrumentation Program (TSIP), in accordance with Proposal No. AST-0335461 submitted by AURA. Support for KCWI has also come from the Heising-Simons Foundation and the Mount Cuba Foundation. KCRM is supported in part by the National Science Foundation under Grant No. AST-1429890. The OSIRIS spectrograph upgrade including DRP development is supported by the National Science Foundation under Grant No. AST-1311102 while the imager upgrade project is supported by funding from the Gordon and Betty Moore Foundation. K1DM3 is supported in part by the National Science Foundation under Grant No. AST-1337609. The NIRSPEC upgrade is supported in part by the National Science Foundation under Grant No. AST-1532315 and by the Heising-Simons Foundation. The wave front controller supported by the National Science Foundation under Grant AST-1727071. Development of KPF is supported by the Heising-Simons Foundation.\n\nPublished - 1070207.pdf
", "abstract": "Since the start of operations in 1993, the twin 10 meter W. M. Keck Observatory telescopes have continued to maximize their scientific impact and to produce transformative discoveries that keep the observing community on the frontiers of astronomical research. Upgraded capabilities and new instrumentation are provided though collaborative partnerships with Caltech and UC instrument development teams. The observatory adapts and responds to the observers' evolving needs as defined in the observatory's strategic plan, periodically refreshed in collaboration with the science community. This paper summarizes the performance of recently commissioned infrastructure projects, technology upgrades, and new additions to the suite of instrumentation at the observatory. We will also provide a status of projects currently in the design or development phase, and since we need to keep our eye on the future, we mention projects in exploratory phases that originate from our strategic plan. Recently commissioned projects include telescope control system upgrades, OSIRIS spectrometer and imager upgrades, and deployments of the Keck Cosmic Web Imager (KCWI), the Near-Infrared Echellette Spectrometer (NIRES), and the Keck I Deployable Tertiary Mirror (KIDM3). Under development are upgrades to the NIRSPEC instrument and adaptive optics (AO) system. Major instrumentation in design phases include the Keck Cosmic Reionization Mapper and the Keck Planet Finder. Future instrumentation studies and proposals underway include a Ground Layer Adaptive Optics system, NIRC2 upgrades, the energy sensitive instrument KRAKENS, an integral field spectrograph LIGER, and a laser tomography AO upgrade. Last, we briefly discuss recovering MOSFIRE and its return to science operations.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 1070207", "id_number": "CaltechAUTHORS:20180719-102954010", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180719-102954010", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-0335461" }, { "agency": "Heising-Simons Foundation" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "NSF", "grant_number": "AST-1429890" }, { "agency": "NSF", "grant_number": "AST-1311102" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "NSF", "grant_number": "AST-1337609" }, { "agency": "NSF", "grant_number": "AST-1532315" }, { "agency": "NSF", "grant_number": "AST-1727071" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2312316", "primary_object": { "basename": "1070207.pdf", "url": "https://authors.library.caltech.edu/records/dkxah-vz065/files/1070207.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Kassis, Marc; Chan, Dwight; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/c5jpb-h5t97", "eprint_id": 92119, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:04", "lastmod": "2024-01-14 21:24:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans-Ulrich" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Arsenault-R", "name": { "family": "Arsenault", "given": "Robin" } }, { "id": "Jakob-G", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Leveratto-S", "name": { "family": "Leveratto", "given": "Serban" } }, { "id": "Zins-G", "name": { "family": "Zins", "given": "G\u00e9rard" } }, { "id": "Fuenteseca-E", "name": { "family": "Fuenteseca", "given": "Eloy" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Sterzik-M", "name": { "family": "Sterzik", "given": "Michael" } }, { "id": "Ageorges-N", "name": { "family": "Ageorges", "given": "Nancy" } }, { "id": "Gutruf-S", "name": { "family": "Gutruf", "given": "Sven" } }, { "id": "Kampf-D", "name": { "family": "Kampf", "given": "Dirk" } }, { "id": "Reutlinger-A", "name": { "family": "Reutlinger", "given": "Arnd" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Klupar-P", "name": { "family": "Klupar", "given": "Peter" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } } ] }, "title": "NEAR: New Earths in the Alpha Cen Region (bringing VISIR as a \"visiting instrument\" to ESO-VLT-UT4)", "ispublished": "unpub", "full_text_status": "public", "keywords": "exo-Earth, alpha-Cen, habitable zone, coronagraphy, apodization, extreme AO, thermal infrared", "note": "\u00a9 2018 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nThis project was only possible with the enthusiastic support of many staff at ESO, but also in the community.\nOf particular importance is a grant by the Breakthrough Initiatives and the generous offer of DDT by ESO's\nDirector General.\n\nPublished - 107020D.pdf
", "abstract": "By adding a dedicated coronagraph, ESO in collaboration with the Breakthrough Initiatives, modifies the Very Large Telescope mid-IR imager (VISIR) to further boost the high dynamic range imaging capability this instru- ment has. After the VISIR upgrade in 2012, where coronagraphic masks were first added to VISIR, it became evident that coronagraphy at a ground-based 8m-class telescope critically needs adaptive optics, even at wavelengths as long as 10\u03bcm. For VISIR, a work-horse observatory facility instrument in normal operations, this is \"easiest\" achieved by bringing VISIR as a visiting instrument to the ESO-VLT-UT4 having an adaptive M2. This \"visit\" enables a meaningful search for Earth-like planets in the habitable zone around both \u03b1-Cen1,2. Meaningful here means, achieving a contrast of \u2248 10^(-6) within \u2248 0.8arcsec from the star while maintaining basically the normal sensitivity of VISIR. This should allow to detect a planet twice the diameter of Earth. Key components will be a diffractive coronagraphic mask, the annular groove phase mask (AGPM), optimized for the most sensitive spectral band-pass in the N-band, complemented by a sophisticated apodizer at the level of the Lyot stop. For VISIR noise filtering based on fast chopping is required. A novel internal chopper system will be integrated into the cryostat. This chopper is based on the standard technique from early radio astronomy, conceived by the microwave pioneer Robert Dicke in 1946, which was instrumental for the discovery of the 3K radio background.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107020D", "id_number": "CaltechAUTHORS:20190107-142202163", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190107-142202163", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2313395", "primary_object": { "basename": "107020D.pdf", "url": "https://authors.library.caltech.edu/records/c5jpb-h5t97/files/107020D.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "K\u00e4ufl, Hans-Ulrich; Kasper, Markus; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k6xfx-x0d65", "eprint_id": 98179, "eprint_status": "archive", "datestamp": "2023-08-19 10:16:42", "lastmod": "2024-01-14 21:53:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Morgan-R-M", "name": { "family": "Morgan", "given": "Rhonda" } }, { "id": "Warfield-K-R", "name": { "family": "Warfield", "given": "Keith" } }, { "id": "Kuan-Gary", "name": { "family": "Kuan", "given": "Gary" } }, { "id": "Stahl-H-P", "name": { "family": "Stahl", "given": "H. Phi" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Balasubramanian-B", "name": { "family": "Balasubramanian", "given": "Bala" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nikzad-S", "name": { "family": "Nikzad", "given": "Shouleh" } }, { "id": "Nissen-J-A", "name": { "family": "Nissen", "given": "Joel" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Warwick-S", "name": { "family": "Warwick", "given": "Steve" } } ] }, "title": "Technology maturity for the habitable-zone exoplanet imaging observatory (HabEx) concept", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanets, technology gaps, HabEx, detectors, coronagraph, starshade, deformable mirror", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe HabEx Concept design is pre-decisional information presented for planning and discussion purposes only. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 106980S.pdf
", "abstract": "HabEx Architecture A is a 4m unobscured telescope mission concept optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and also enables a wide range of general astrophysics science. The exoplanet detection and characterization drives the enabling core technologies. A hybrid starlight suppression approach of a starshade and coronagraph diversifies technology maturation risk. In this paper we assess these exoplanet-driven technologies, including elements of coronagraphs, starshades, mirrors, jitter mitigation, wavefront control, and detectors. By utilizing high technology readiness solutions where feasible, and identifying required technology development that can begin early, HabEx will be well positioned for assessment by the community in 2020 Astrophysics Decadal Survey.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 106980S", "id_number": "CaltechAUTHORS:20190823-134012861", "isbn": "9781510619494", "book_title": "Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134012861", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Mackenzie" } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Batalha-N-M", "name": { "family": "Batalha", "given": "Natalie" } }, { "id": "Siegler-N", "name": { "family": "Siegler", "given": "Nicholas" } }, { "id": "Tong-Edward-C", "name": { "family": "Tong", "given": "Edward C." } } ] }, "doi": "10.1117/12.2313845", "primary_object": { "basename": "106980S.pdf", "url": "https://authors.library.caltech.edu/records/k6xfx-x0d65/files/106980S.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Morgan, Rhonda; Warfield, Keith; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9v1fq-a6a63", "eprint_id": 92049, "eprint_status": "archive", "datestamp": "2023-08-19 10:15:44", "lastmod": "2024-02-02 21:12:04", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Tinyanont-S", "name": { "family": "Tinyanont", "given": "Samaporn" }, "orcid": "0000-0002-1481-4676" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Maxwell" }, "orcid": "0000-0001-6205-9233" }, { "id": "Nilsson-R", "name": { "family": "Nilsson", "given": "Ricky" }, "orcid": "0000-0002-5408-4954" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" }, { "id": "Kataria-T", "name": { "family": "Kataria", "given": "Tiffany" }, "orcid": "0000-0003-3759-9080" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Henderson-C-P", "name": { "family": "Henderson", "given": "Charles" } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer W." } }, { "id": "Hale-D-D-S", "name": { "family": "Hale", "given": "David" } }, { "id": "Smith-R-M", "name": { "family": "Smith", "given": "Roger" } }, { "id": "Vissapragada-S", "name": { "family": "Vissapragada", "given": "Shreyas" }, "orcid": "0000-0003-2527-1475" } ] }, "title": "WIRC+Pol: low-resolution near-infrared spectropolarimeter", "ispublished": "unpub", "full_text_status": "public", "keywords": "spectropolarimetry, polarization grating", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWIRC+Pol instrument upgrade was funded by Mt. Cuba Astronomical Foundation. We thank Paulo Miles-P\u00e1ez for providing us polarized spectra of Elia 2-25 polarized standard star for comparison with our observations and for discussions on best practices in reducing near-infrared spectropolarimetric data. We thank staff of Palomar Observatory for assisting our observations. Palomar Observatory is operated by a collaboration between California Institute of Technology, Jet Propulsion Laboratory, Yale University, and National Astronomical Observatories of China.\n\nPublished - 107023J.pdf
", "abstract": "WIRC+Pol is a newly commissioned low-resolution (R 100), near-infrared (J and H bands) spectropolarimetry mode of the Wide-field InfraRed Camera (WIRC) on the 200-inch Hale Telescope at Palomar Observatory. The instrument utilizes a novel polarimeter design based on a quarter-wave plate and a polarization grating (PG), which provides full linear polarization measurements (Stokes I, Q, and U ) in one exposure with no need for a polarimetric modulator. The PG also has high transmission across the J and H bands. The instrument is situated at the prime focus of an equatorially mounted telescope. As a result, the system only has one reflection in the light path and the instrument does not rotate with respect to the sky, which provides minimal and stable telescope induced polarization. A data reduction pipeline has been developed for WIRC+Pol to produce linear polarization measurements from observations, allowing, e.g., real-time monitoring of the signal-to-noise ratio of ongoing observations. WIRC+Pol has been on-sky since February 2017. Results from the first year commissioning data show that the instrument has a high dispersion efficiency as expected from the polarization grating. We discuss instrumental systematics we have uncovered in the data, their potential causes, along with calibrations that are necessary to eliminate them. We demonstrate the polarimetric stability of the instrument with RMS variation at 0.2% level over 30 minutes for a bright standard star (J = 8.7). While the spectral extraction is photon noise limited, polarization calibration between sources remain limited by systematics.", "date": "2018-07-06", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 107023J", "id_number": "CaltechAUTHORS:20190103-153503630", "isbn": "9781510619579", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190103-153503630", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Mt. Cuba Astronomical Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Chriostopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2314161", "primary_object": { "basename": "107023J.pdf", "url": "https://authors.library.caltech.edu/records/9v1fq-a6a63/files/107023J.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Tinyanont, Samaporn; Millar-Blanchaer, Maxwell; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9gn99-kh080", "eprint_id": 85881, "eprint_status": "archive", "datestamp": "2023-08-19 09:25:15", "lastmod": "2023-10-18 19:04:11", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meeker-Seth-R", "name": { "family": "Meeker", "given": "Seth R." } }, { "id": "Mazin-Benjamin-A", "name": { "family": "Mazin", "given": "Benjamin A." } }, { "id": "Walter-Alex-B", "name": { "family": "Walter", "given": "Alex B." } }, { "id": "Strader-Paschal", "name": { "family": "Strader", "given": "Paschal" } }, { "id": "Fruitwala-Neelay", "name": { "family": "Fruitwala", "given": "Neelay" } }, { "id": "Bockstiegel-Clint", "name": { "family": "Bockstiegel", "given": "Clint" } }, { "id": "Szypryt-Paul", "name": { "family": "Szypryt", "given": "Paul" } }, { "id": "Ulbricht-Gerhard", "name": { "family": "Ulbricht", "given": "Gerhard" } }, { "id": "Coiffard-Gr\u00e9goire", "name": { "family": "Coiffard", "given": "Gr\u00e9goire" } }, { "id": "Bumble-Bruce", "name": { "family": "Bumble", "given": "Bruce" } }, { "id": "Cancelo-Gustavo", "name": { "family": "Cancelo", "given": "Gustavo" } }, { "id": "Zmuda-Ted", "name": { "family": "Zmuda", "given": "Ted" } }, { "id": "Treptow-Ken", "name": { "family": "Treptow", "given": "Ken" } }, { "id": "Wilcer-Neal", "name": { "family": "Wilcer", "given": "Neal" } }, { "id": "Collura-Giulia", "name": { "family": "Collura", "given": "Giulia" } }, { "id": "Dodkins-Rupert", "name": { "family": "Dodkins", "given": "Rupert" }, "orcid": "0000-0002-3973-7646" }, { "id": "Lipartito-Isabel", "name": { "family": "Lipartito", "given": "Isabel" }, "orcid": "0000-0003-4792-6479" }, { "id": "Zobrist-Nicholas", "name": { "family": "Zobrist", "given": "Nicholas" } }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Shelton-J-Chris", "name": { "family": "Shelton", "given": "J. Chris" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "van-Eyken-Julian-C", "name": { "family": "van Eyken", "given": "Julian C." }, "orcid": "0000-0003-2192-5371" }, { "id": "Vasisht-Gautam", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "DARKNESS: A Microwave Kinetic Inductance Detector Integral Field Spectrograph for High-contrast Astronomy", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 instrumentation: detectors \u2013 instrumentation: spectrographs \u2013 Instrumentation: coronagraphs \u2013 planets and satellites: detection", "note": "\u00a9 2018 The Astronomical Society of the Pacific. \n\nReceived 2017 October 24; accepted 2018 March 8; published 2018 April 16. \n\nThe authors would like to thank the anonymous referee for the thorough and helpful comments. We also extend a special thanks to the amazing staff of Palomar Observatory. Their patience, knowledge, and support have been vital to the successful design and operation of DARKNESS. DARKNESS was funded by an NSF ATI grant AST-1308556. S.R.M., P.S., and N.Z. were supported throughout this work by NASA Office of the Chief Technologist's Space Technology Research Fellowships (NSTRF). The research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was performed in part by Fermi Research Alliance, LLC under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. This work is based on observations obtained at the Hale Telescope, Palomar Observatory as part of a continuing collaboration between the California Institute of Technology, NASA/JPL, Yale University, and the National Astronomical Observatories of China. \n\nFacilities: Hale (PALM-3000 - , Stellar Double Coronagraph).\n\nAccepted Version - 1803.10420.pdf
", "abstract": "We present DARKNESS (the DARK-speckle Near-infrared Energy-resolving Superconducting Spectrophotometer), the first of several planned integral field spectrographs to use optical/near-infrared Microwave Kinetic Inductance Detectors (MKIDs) for high-contrast imaging. The photon counting and simultaneous low-resolution spectroscopy provided by MKIDs will enable real-time speckle control techniques and post-processing speckle suppression at frame rates capable of resolving the atmospheric speckles that currently limit high-contrast imaging from the ground. DARKNESS is now operational behind the PALM-3000 extreme adaptive optics system and the Stellar Double Coronagraph at Palomar Observatory. Here, we describe the motivation, design, and characterization of the instrument, early on-sky results, and future prospects.", "date": "2018-06", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "130", "number": "988", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 065001", "id_number": "CaltechAUTHORS:20180416-141508782", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180416-141508782", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1308556" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-AC02-07CH11359" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.1088/1538-3873/aab5e7", "primary_object": { "basename": "1803.10420.pdf", "url": "https://authors.library.caltech.edu/records/9gn99-kh080/files/1803.10420.pdf" }, "resource_type": "article", "pub_year": "2018", "author_list": "Meeker, Seth R.; Mazin, Benjamin A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/v729x-1gk54", "eprint_id": 84625, "eprint_status": "archive", "datestamp": "2023-09-29 01:31:17", "lastmod": "2023-10-24 15:26:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "K\u00fchn-J", "name": { "family": "K\u00fchn", "given": "J." }, "orcid": "0000-0002-6344-4835" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "J." }, "orcid": "0000-0002-3047-1845" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Currie-T", "name": { "family": "Currie", "given": "T." }, "orcid": "0000-0002-7405-3119" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "id": "Kudo-T", "name": { "family": "Kudo", "given": "T." } }, { "id": "Martinache-F", "name": { "family": "Martinache", "given": "F." }, "orcid": "0000-0003-1180-4138" }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Singh-G", "name": { "family": "Singh", "given": "G." } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "M." }, "orcid": "0000-0002-6510-0681" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Hagelberg-J", "name": { "family": "Hagelberg", "given": "J." }, "orcid": "0000-0002-1096-1433" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" } ] }, "title": "An H-band Vector Vortex Coronagraph for the Subaru Coronagraphic Extreme Adaptive Optics System", "ispublished": "pub", "full_text_status": "public", "keywords": "infrared: planetary systems \u2013 instrumentation: high angular resolution \u2013 planets and satellites: detection \u2013 techniques: high angular resolution", "note": "\u00a9 2018. The Astronomical Society of the Pacific. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2017 November 3; accepted 2017 December 5; published 2018 January 29. \n\nPart of this work was performed at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under contract with NASA. The vortex coronagraph presented herein is a loaned part by JPL to the SCExAO instrument team. The development of SCExAO was supported by the JSPS (Grant-in-Aid for Research #23340051, #26220704, #23103002), the Astrobiology Center (ABC) of the National Institutes of Natural Sciences, Japan, the Mt. Cuba Foundation and the directors contingency fund at Subaru Telescope. J.K. and J.H. are/were supported by the Swiss National Science Foundation (SNF) for this work, through the grants #PZ00P2_154800 and #PA00P2_136416 for J.K., and #P2GEP2_151842 for J.H.. We wish to emphasize the pivotal cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the privilege to conduct scientific observations from this mountain.\n\nPublished - Kuhn_2018_PASP_130_035001.pdf
Submitted - 1712_02040.pdf
", "abstract": "The vector vortex is a coronagraphic imaging mode of the recently commissioned Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) platform on the 8 m Subaru Telescope. This multi-purpose high-contrast visible and near-infrared (R- to K-band) instrument is not only intended to serve as a VLT-class \"planet-imager\" instrument in the northern hemisphere, but also to operate as a technology demonstration testbed ahead of the ELTs-era, with a particular emphasis on small inner-working angle (IWA) coronagraphic capabilities. The given priority to small-IWA imaging led to the early design choice to incorporate focal-plane phase-mask coronagraphs. In this context, a test H-band vector vortex liquid crystal polymer waveplate was provided to SCExAO, to allow a one-to-one comparison of different small-IWA techniques on the same telescope instrument, before considering further steps. Here we present a detailed overview of the vector vortex coronagraph, from its installation and performances on the SCExAO optical bench, to the on-sky results in the extreme AO regime, as of late 2016/early 2017. To this purpose, we also provide a few recent on-sky imaging examples, notably high-contrast ADI detection of the planetary-mass companion \u03ba Andromedae b, with a signal-to-noise ratio above 100 reached in less than 10 mn exposure time.", "date": "2018-03", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "130", "number": "985", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 035001", "id_number": "CaltechAUTHORS:20180201-112824694", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180201-112824694", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23340051" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "26220704" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23103002" }, { "agency": "National Institutes of Natural Sciences (Japan)" }, { "agency": "Mt. Cuba Astronomical Foundation" }, { "agency": "Subaru Telescope" }, { "agency": "Swiss National Science Foundation (SNSF)", "grant_number": "PZ00P2_154800" }, { "agency": "Swiss National Science Foundation (SNSF)", "grant_number": "PA00P2_136416" }, { "agency": "Swiss National Science Foundation (SNSF)", "grant_number": "P2GEP2_151842" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1088/1538-3873/aa9fe5", "primary_object": { "basename": "1712_02040.pdf", "url": "https://authors.library.caltech.edu/records/v729x-1gk54/files/1712_02040.pdf" }, "related_objects": [ { "basename": "Kuhn_2018_PASP_130_035001.pdf", "url": "https://authors.library.caltech.edu/records/v729x-1gk54/files/Kuhn_2018_PASP_130_035001.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "K\u00fchn, J.; Serabyn, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5sccq-1tw24", "eprint_id": 85757, "eprint_status": "archive", "datestamp": "2023-08-19 08:02:18", "lastmod": "2023-10-18 18:45:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "M." }, "orcid": "0000-0003-2911-0898" }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C. A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "B." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "K." } }, { "id": "Barraza-M", "name": { "family": "Barraza", "given": "M." }, "orcid": "0000-0002-9994-4284" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "B." } }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Orban-de-Xivry-G", "name": { "family": "Orban de Xivry", "given": "G." }, "orcid": "0000-0002-4790-415X" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "P." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catal\u00e1n-E", "name": { "family": "Vargas Catal\u00e1n", "given": "E." } }, { "id": "Wertz-O", "name": { "family": "Wertz", "given": "O." }, "orcid": "0000-0003-3849-2285" } ] }, "title": "Discovery of a point-like source and a third spiral arm in the transition disk around the Herbig Ae star MWC 758", "ispublished": "pub", "full_text_status": "public", "keywords": "protoplanetary disks / planet-disk interactions / stars: pre-main sequence / stars: individual: MWC 758 (HD 36112)", "note": "\u00a9 ESO 2018. \n\nReceived 29 September 2017 / Accepted 30 November 2017.\n\nWe would like to acknowledge the anonymous referee for the helpful comments. We thank Simon Casassus and Sebasti\u00e1n Perez for fruitful discussions on the spiral arms, and Farzana Meru for useful insights on disk cavities. This research was founded by the European Research Council under the European Union's Seventh Framework Program (ERC Grant Agreement n. 337569) and by the French Community of Belgium through an ARC grant for Concerted Research Action. V.C. acknowledges support from CONICYT through CONICYT-PCHA/Doctorado Nacional/2016-21161112, and from the Millennium Science Initiative (Chilean Ministry of Economy), through grant RC130007. G.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. E.C. acknowledges support from NASA through Hubble Fellowship grant HST-HF2-51355 awarded by STScI, operated by AURA Inc. for NASA under contract NAS5-2655. This work used data reprocessed as part of the ALICE program, which was supported by NASA through grant HST-AR-12652, HST-GO-11136, HST-GO-13855, HST-GO-1331, and STScI Director's Discretionary Research Funds. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.\n\nPublished - aa32016-17.pdf
", "abstract": "Context. Transition disks offer the extraordinary opportunity to look for newly born planets and to investigate the early stages of planet formation. \n\nAim. In this context we observed the Herbig A5 star MWC 758 with the L\u2032-band vector vortex coronagraph installed in the near-infrared camera and spectrograph NIRC2 at the Keck II telescope, with the aim of unveiling the nature of the spiral structure by constraining the presence of planetary companions in the system. \n\nMethods. Our high-contrast imaging observations show a bright (\u0394L\u2032 = 7.0 \u00b1 0.3 mag) point-like emission south of MWC 758 at a deprojected separation of ~20 au (r = 0.\u2032\u2032111 \u00b1 0.\u2032\u2032004) from the central star. We also recover the two spiral arms (southeast and northwest), already imaged by previous studies in polarized light, and discover a third arm to the southwest of the star. No additional companions were detected in the system down to 5 Jupiter masses beyond 0.\u2032\u20326 from the star. \n\nResults. We propose that the bright L\u2032-band emission could be caused by the presence of an embedded and accreting protoplanet, although the possibility of it being an asymmetric disk feature cannot be excluded. The spiral structure is probably not related to the protoplanet candidate, unless on an inclined and eccentric orbit, and it could be due to one (or more) yet undetected planetary companions at the edge of or outside the spiral pattern. Future observations and additional simulations will be needed to shed light on the true nature of the point-like source and its link with the spiral arms.", "date": "2018-03", "date_type": "published", "publication": "Astronomy & Astrophysics", "volume": "611", "publisher": "EDP Sciences", "pagerange": "Art. No. A74", "id_number": "CaltechAUTHORS:20180411-114500404", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180411-114500404", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "2016-21161112" }, { "agency": "Iniciativa Cient\u00edfica Milenio", "grant_number": "RC130007" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "HST-AR-12652" }, { "agency": "NASA", "grant_number": "HST-GO-11136" }, { "agency": "NASA", "grant_number": "HST-GO-13855" }, { "agency": "NASA", "grant_number": "HST-GO-1331" }, { "agency": "Space Telescope Science Institute" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201732016", "primary_object": { "basename": "aa32016-17.pdf", "url": "https://authors.library.caltech.edu/records/5sccq-1tw24/files/aa32016-17.pdf" }, "resource_type": "article", "pub_year": "2018", "author_list": "Reggiani, M.; Christiaens, V.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cw7ak-tx344", "eprint_id": 84809, "eprint_status": "archive", "datestamp": "2023-08-21 22:46:29", "lastmod": "2023-10-18 16:43:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Bryden-G", "name": { "family": "Bryden", "given": "G." } }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "M. D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R." }, "orcid": "0000-0003-2753-2819" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "Cheng-Christine-H", "name": { "family": "Cheng", "given": "C. H." }, "orcid": "0000-0002-8382-0447" }, { "id": "Debes-J-H", "name": { "family": "Debes", "given": "J. H." }, "orcid": "0000-0002-1783-8817" }, { "id": "Gofas-Salas-E", "name": { "family": "Gofas-Salas", "given": "E." } }, { "id": "Hagan-J-B", "name": { "family": "Hagan", "given": "J. B." } }, { "id": "Hines-D-C", "name": { "family": "Hines", "given": "D. C." }, "orcid": "0000-0003-4653-6161" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Morales-F-Y", "name": { "family": "Morales", "given": "F." }, "orcid": "0000-0001-9414-3851" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Rajan-A", "name": { "family": "Rajan", "given": "A." } }, { "id": "Ren-Bin", "name": { "family": "Ren", "given": "B." }, "orcid": "0000-0003-1698-9696" }, { "id": "Schneider-G", "name": { "family": "Schneider", "given": "G." }, "orcid": "0000-0002-4511-5966" }, { "id": "Stark-C-C", "name": { "family": "Stark", "given": "C. C." } }, { "id": "Wolff-S-C", "name": { "family": "Wolff", "given": "S." } } ] }, "title": "HD 104860 and HD 192758: Two Debris Disks Newly Imaged in Scattered Light with the Hubble Space Telescope", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter; stars: individual (HD 104860, HD 192758); techniques: image processing", "note": "\u00a9 2018 American Astronomical Society. \n\nReceived 2017 December 16. Accepted 2018 January 15. Published 2018 February 12. \n\nE.C. acknowledges support from NASA through Hubble Fellowship grant HF2-51355 awarded by STScI, which is operated by AURA, Inc. for NASA under contract NAS5-26555, for research carried out at the Jet Propulsion Laboratory, California Institute of Technology. J.-C.A. acknowledges support from the \"Programme National de Plan\u00e9tologie\" (PNP) of CNRS/INSU co-funded by the CNES. This work is based on data reprocessed as part of the ALICE program, which was supported by NASA through grants HST-AR-12652 (PI: R. Soummer), HST-GO-11136 (PI: D. Golimowski), HST-GO-13855 (PI: E. Choquet), HST-GO-13331 (PI: L. Pueyo), and STScI Director's Discretionary Research funds. Part of these data were calibrated as part of the LAPLACE program, which was supported by NASA through grants HST-AR-11279 (PI: G. Schneider). This research has made use of NASA's Astrophysics Data System (ADS), the Washington Double Star Catalog, maintained at the U.S. Naval Observatory, the Keck Observatory Archive (KOA), operated by the W. M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI) under contract with NASA, the SIMBAD database, operated at CDS, Strasbourg, France, and of data from the European Space Agency (ESA) mission Gaia. This research has used archival data from HST programs HST-GO-10527 (PI: D. Hines) and HST-GO-11157 (PI: J. Rhee), and from Keck programs. We thank the anonymous referee for comments which made the paper much clearer. \n\nFacility: HST(NICMOS) - Hubble Space Telescope satellite.\n\nPublished - Choquet_2018_ApJ_854_53.pdf
Submitted - 1801.05424.pdf
", "abstract": "We present the first scattered-light images of two debris disks around the F8 star HD 104860 and the F0V star HD 192758, respectively ~45 and ~67 pc away. We detected these systems in the F110W and F160W filters through our reanalysis of archival Hubble Space Telescope (HST) NICMOS data with modern starlight-subtraction techniques. Our image of HD 104860 confirms the morphology previously observed by Herschel in thermal emission with a well-defined ring at a radius of ~114 au inclined by ~58\u00b0. Although the outer edge profile is consistent with dynamical evolution models, the sharp inner edge suggests sculpting by unseen perturbers. Our images of HD 192758 reveal a disk at radius ~95 au inclined by ~59\u00b0, never resolved so far. These disks have low scattering albedos of 10% and 13%, respectively, inconsistent with water ice grain compositions. They are reminiscent of several other disks with similar inclination and scattering albedos: Fomalhaut, HD 92945, HD 202628, and HD 207129. They are also very distinct from brighter disks in the same inclination bin, which point to different compositions between these two populations. Varying scattering albedo values can be explained by different grain porosities, chemical compositions, or grain size distributions, which may indicate distinct formation mechanisms or dynamical processes at work in these systems. Finally, these faint disks with large infrared excesses may be representative of an underlying population of systems with low albedo values. Searches with more sensitive instruments on HST or on the James Webb Space Telescope and using state-of-the art starlight-subtraction methods may help discover more of such faint systems.", "date": "2018-02-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "854", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 53", "id_number": "CaltechAUTHORS:20180213-095214522", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180213-095214522", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Hubble Fellowship", "grant_number": "HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "Programme National de Plan\u00e9tologie (PNP)" }, { "agency": "NASA", "grant_number": "HST-AR-12652" }, { "agency": "NASA", "grant_number": "HST-GO-11136" }, { "agency": "NASA", "grant_number": "HST-GO-13855" }, { "agency": "NASA", "grant_number": "HST-GO-13331" }, { "agency": "Space Telescope Science Institute" }, { "agency": "NASA", "grant_number": "HST-AR-11279" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/aaa892", "primary_object": { "basename": "1801.05424.pdf", "url": "https://authors.library.caltech.edu/records/cw7ak-tx344/files/1801.05424.pdf" }, "related_objects": [ { "basename": "Choquet_2018_ApJ_854_53.pdf", "url": "https://authors.library.caltech.edu/records/cw7ak-tx344/files/Choquet_2018_ApJ_854_53.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Choquet, \u00c9.; Bryden, G.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1se8z-kch33", "eprint_id": 87166, "eprint_status": "archive", "datestamp": "2023-08-19 07:26:52", "lastmod": "2024-01-14 20:15:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N. S." } }, { "id": "Llop-Sayson-J-D", "name": { "family": "Llop Sayson", "given": "J. D." } }, { "id": "Zhang-R", "name": { "family": "Zhang", "given": "R." } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Y." } }, { "id": "Riddle-R-L", "name": { "family": "Riddle", "given": "R." }, "orcid": "0000-0002-0387-370X" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Randolph-M", "name": { "family": "Randolph", "given": "M." } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" } ] }, "title": "High-contrast spectroscopy testbed for segmented telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, Testbed, Segmented Telescopes Simulator, High contrast imaging, Wavefront\ncontrol, High Spectral Resolution, High Dispersion Coronagraphy", "note": "\u00a9 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was also supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA. Finally, we would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 104000X.pdf
", "abstract": "The High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) at Caltech is aimed at filling gaps in technology for future exoplanet imagers and providing the U.S. community with an academic facility to test components and techniques for high contrast imaging with future segmented ground-based telescope (TMT, E-ELT) and space-based telescopes (HabEx, LUVOIR). The HCST will be able to simulate segmented telescope geometries up to 1021 hexagonal segments and time-varying external wavefront disturbances. It also contains a wavefront corrector module based on two deformable mirrors followed by a classical 3-plane single-stage corona- graph (entrance apodizer, focal-plane mask, Lyot stop) and a science instrument. The back-end instrument will consist of an imaging detector and a high-resolution spectrograph, which is a unique feature of the HCST. The spectrograph instrument will utilize spectral information to characterize simulated planets at the photon-noise limit, measure the chromaticity of new optimized coronagraph and wavefront control concepts, and test the overall scientific functions of high-resolution spectrographs on future segmented telescopes.", "date": "2018-01-22", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000X", "id_number": "CaltechAUTHORS:20180615-144222840", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-144222840", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274893", "primary_object": { "basename": "104000X.pdf", "url": "https://authors.library.caltech.edu/records/1se8z-kch33/files/104000X.pdf" }, "resource_type": "book_section", "pub_year": "2018", "author_list": "Delorme, J. R.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/n1v9w-fp087", "eprint_id": 84107, "eprint_status": "archive", "datestamp": "2023-08-21 22:30:11", "lastmod": "2023-10-18 14:41:55", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Currie-T", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "Matthew A." }, "orcid": "0000-0002-7064-8270" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Tanner-A-M", "name": { "family": "Tanner", "given": "Angelle" }, "orcid": "0000-0002-2903-2140" }, { "id": "Cantalloube-F", "name": { "family": "Cantalloube", "given": "Faustine" } } ] }, "title": "A New Standard for Assessing the Performance of High Contrast Imaging Systems", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: statistical; techniques: high angular resolution", "note": "\u00a9 2017. The American Astronomical Society. \n\nReceived 2017 February 12; revised 2017 October 31; accepted 2017 October 31; published 2017 December 15. \n\nThis work has been supported by the Keck Institute for Space Studies and the NASA Exoplanet Exploration Program Study Analysis Group #19: Exoplanet Imaging Signal Detection Theory and Rigorous Contrast Metrics. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1144469. G.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. C.G.G. and O.A. acknowledge funding from the European Research Council Under the European Union's Seventh Framework Program (ERC Grant Agreement No. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action. \n\nSoftware: Vortex Image Processing (Gomez Gonzalez et al. 2017).\n\nPublished - Jensen-Clem_2018_AJ_155_19.pdf
Submitted - 1711.01215.pdf
", "abstract": "As planning for the next generation of high contrast imaging instruments (e.g., WFIRST, HabEx, and LUVOIR, TMT-PFI, EELT-EPICS) matures and second-generation ground-based extreme adaptive optics facilities (e.g., VLT-SPHERE, Gemini-GPI) finish their principal surveys, it is imperative that the performance of different designs, post-processing algorithms, observing strategies, and survey results be compared in a consistent, statistically robust framework. In this paper, we argue that the current industry standard for such comparisons\u2014the contrast curve\u2014falls short of this mandate. We propose a new figure of merit, the \"performance map,\" that incorporates three fundamental concepts in signal detection theory: the true positive fraction, the false positive fraction, and the detection threshold. By supplying a theoretical basis and recipe for generating the performance map, we hope to encourage the widespread adoption of this new metric across subfields in exoplanet imaging.", "date": "2018-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "155", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 19", "id_number": "CaltechAUTHORS:20180104-153536985", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180104-153536985", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Keck Institute for Space Studies (KISS)" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144469" }, { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "local_group": { "items": [ { "id": "Keck-Institute-for-Space-Studies" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aa97e4", "primary_object": { "basename": "Jensen-Clem_2018_AJ_155_19.pdf", "url": "https://authors.library.caltech.edu/records/n1v9w-fp087/files/Jensen-Clem_2018_AJ_155_19.pdf" }, "related_objects": [ { "basename": "1711.01215.pdf", "url": "https://authors.library.caltech.edu/records/n1v9w-fp087/files/1711.01215.pdf" } ], "resource_type": "article", "pub_year": "2018", "author_list": "Jensen-Clem, Rebecca; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2v24g-6sc28", "eprint_id": 86915, "eprint_status": "archive", "datestamp": "2023-08-21 22:32:10", "lastmod": "2023-10-18 20:41:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Jewell-J-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Vortex coronagraphs for the Habitable Exoplanet Imaging Mission concept: theoretical performance and telescope requirements", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation; exoplanets; direct detection; coronagraphs", "note": "\u00a9 The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. \n\nPaper 17093P received Nov. 14, 2017; accepted for publication Mar. 9, 2018; published online Mar. 28, 2018. \n\nWe thank the HabEx Coronagraph Technology Working Group (CTWG) for useful discussions. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 015004.pdf
", "abstract": "The Habitable Exoplanet Imaging Mission concept requires an optical coronagraph that provides deep starlight suppression over a broad spectral bandwidth, high throughput for point sources at small angular separation, and insensitivity to temporally varying, low-order aberrations. Vortex coronagraphs are a promising solution that performs optimally on off-axis, monolithic telescopes and may also be designed for segmented telescopes with minor losses in performance. We describe the key advantages of vortex coronagraphs on off-axis telescopes such as (1) unwanted diffraction due to aberrations is passively rejected in several low-order Zernike modes relaxing the wavefront stability requirements for imaging Earth-like planets from <10 to <100\u2009\u2009pm\u2009rms, (2) stars with angular diameters <0.1\u2009\u03bb\u2009\u2009/\u2009\u2009D may be sufficiently suppressed, (3) the absolute planet throughput is <10\u2009\u2009%\u2009\u2009, even for unfavorable telescope architectures, and (4) broadband solutions (\u0394\u03bb\u2009\u2009/\u2009\u2009\u03bb\u2009\u2009<\u2009\u20090.1) are readily available for both monolithic and segmented apertures. The latter make use of grayscale apodizers in an upstream pupil plane to provide suppression of diffracted light from amplitude discontinuities in the telescope pupil without inducing additional stroke on the deformable mirrors. We set wavefront stability requirements on the telescope, based on a stellar irradiance threshold set at an angular separation of 3\u2009\u2009\u00b1\u2009\u20090.5\u03bb\u2009\u2009/\u2009\u2009D from the star, and discuss how some requirements may be relaxed by trading robustness to aberrations for planet throughput.", "date": "2018-01", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "4", "number": "1", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 015004", "id_number": "CaltechAUTHORS:20180608-102446089", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180608-102446089", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1117/1.JATIS.4.1.015004", "primary_object": { "basename": "015004.pdf", "url": "https://authors.library.caltech.edu/records/2v24g-6sc28/files/015004.pdf" }, "resource_type": "article", "pub_year": "2018", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/m8pas-z2t50", "eprint_id": 82326, "eprint_status": "archive", "datestamp": "2023-08-19 06:14:37", "lastmod": "2023-10-17 22:11:50", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "Tiffany" }, "orcid": "0000-0001-6126-2467" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl R." }, "orcid": "0000-0002-2805-7338" }, { "id": "Batygin-K", "name": { "family": "Batygin", "given": "Konstantin" }, "orcid": "0000-0002-7094-7908" }, { "id": "Padgett-D-L", "name": { "family": "Padgett", "given": "Deborah" }, "orcid": "0000-0001-5334-5107" }, { "id": "Morales-F-Y", "name": { "family": "Morales", "given": "Farisa Y." }, "orcid": "0000-0001-9414-3851" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Brandt-T-D", "name": { "family": "Brandt", "given": "Timothy D." }, "orcid": "0000-0003-2630-8073" }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" } ] }, "title": "A Direct Imaging Survey of Spitzer detected debris disks: Occurrence of giant planets in dusty systems", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter \u2013 methods: statistical \u2013 planets and satellites: detection \u2013 techniques: high angular resolution", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2017 March 31; revised 2017 September 15; accepted 2017 September 15; published 2017 November 21. \n\nWe thank the anonymous referee for helpful comments and suggestions that improved this paper. This work was performed with support from the Exoplanetary Science Initiative at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. This work was performed in part under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. Support for this work was provided by NASA through Hubble Fellowship grant #HST-HF2-51369.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. for NASA, under contract NAS5-26555. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. We thank Rahul Patel, Geoff Bryden, Patrick Lowrance, and Grant Kennedy for detailed discussion about AB Pic.\n\nPublished - Meshkat_2017_AJ_154_245.pdf
Submitted - 1710.04185.pdf
", "abstract": "We describe a joint high-contrast imaging survey for planets at the Keck and Very Large Telescope of the last large sample of debris disks identified by the Spitzer Space Telescope. No new substellar companions were discovered in our survey of 30 Spitzer-selected targets. We combine our observations with data from four published surveys to place constraints on the frequency of planets around 130 debris disk single stars, the largest sample to date. For a control sample, we assembled contrast curves from several published surveys targeting 277 stars that do not show infrared excesses. We assumed a double power-law distribution in mass and semimajor axis (SMA) of the form f(m, a) = cM^\u03b1a^\u03b2, where we adopted power-law values and logarithmically flat values for the mass and SMA of planets. We find that the frequency of giant planets with masses 5\u201320 M_(Jup) and separations 10\u20131000 au around stars with debris disks is 6.27% (68% confidence interval 3.68%\u20139.76%), compared to 0.73% (68% confidence interval 0.20%\u20131.80%) for the control sample of stars without disks. These distributions differ at the 88% confidence level, tentatively suggesting distinctness of these samples.", "date": "2017-12", "date_type": "published", "publication": "Astronomical Journal", "volume": "154", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 245", "id_number": "CaltechAUTHORS:20171012-145251179", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20171012-145251179", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51369.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA Sagan Fellowship" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/aa8e9a", "primary_object": { "basename": "1710.04185.pdf", "url": "https://authors.library.caltech.edu/records/m8pas-z2t50/files/1710.04185.pdf" }, "related_objects": [ { "basename": "Meshkat_2017_AJ_154_245.pdf", "url": "https://authors.library.caltech.edu/records/m8pas-z2t50/files/Meshkat_2017_AJ_154_245.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Meshkat, Tiffany; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/d304f-dbb04", "eprint_id": 84865, "eprint_status": "archive", "datestamp": "2023-08-19 05:07:31", "lastmod": "2024-01-14 19:31:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jewell-J-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Redding-D-C", "name": { "family": "Redding", "given": "Dave" } } ] }, "title": "Optimization of coronagraph design for segmented aperture telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, optimization, deformable mirrors, apodization", "note": "\u00a9 2017 SPIE. \n\nWe thank Matthew Bolcar (NASA Goddard Space Flight Center) for providing the aperture for the LUVOIR architecture 'A' design used in this paper. This work was partially performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Adminstration. Government sponsorship acknowledged.\n\nPublished - 104000H.pdf
", "abstract": "The goal of directly imaging Earth-like planets in the habitable zone of other stars has motivated the design of coronagraphs for use with large segmented aperture space telescopes. In order to achieve an optimal trade-off between planet light throughput and diffracted starlight suppression, we consider coronagraphs comprised of a stage of phase control implemented with deformable mirrors (or other optical elements), pupil plane apodization masks (gray scale or complex valued), and focal plane masks (either amplitude only or complex-valued, including phase only such as the vector vortex coronagraph). The optimization of these optical elements, with the goal of achieving 10 or more orders of magnitude in the suppression of on-axis (starlight) diffracted light, represents a challenging non-convex optimization problem with a nonlinear dependence on control degrees of freedom. We develop a new algorithmic approach to the design optimization problem, which we call the \"Auxiliary Field Optimization\" (AFO) algorithm. The central idea of the algorithm is to embed the original optimization problem, for either phase or amplitude (apodization) in various planes of the coronagraph, into a problem containing additional degrees of freedom, specifically fictitious \"auxiliary\" electric fields which serve as targets to inform the variation of our phase or amplitude parameters leading to good feasible designs. We present the algorithm, discuss details of its numerical implementation, and prove convergence to local minima of the objective function (here taken to be the intensity of the on-axis source in a \"dark hole\" region in the science focal plane). Finally, we present results showing application of the algorithm to both unobscured off-axis and obscured on-axis segmented telescope aperture designs. The application of the AFO algorithm to the coronagraph design problem has produced solutions which are capable of directly imaging planets in the habitable zone, provided end-to-end telescope system stability requirements can be met. Ongoing work includes advances of the AFO algorithm reported here to design in additional robustness to a resolved star, and other phase or amplitude aberrations to be encountered in a real segmented aperture space telescope.", "date": "2017-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-092345021", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-092345021", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274574", "primary_object": { "basename": "104000H.pdf", "url": "https://authors.library.caltech.edu/records/d304f-dbb04/files/104000H.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Jewell, Jeffrey; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7f1w5-32072", "eprint_id": 84862, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:37", "lastmod": "2024-01-14 19:31:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J. R." } }, { "id": "Jovanovic-N", "name": { "family": "Jovanovic", "given": "N." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R. D." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P. L." }, "orcid": "0000-0002-1646-442X" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" }, { "id": "Lilley-S", "name": { "family": "Lilley", "given": "S." } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N." } }, { "id": "Xin-Yeyuan", "name": { "family": "Xin", "given": "Y." } } ] }, "title": "A fiber injection unit for the Keck Planet Imager and Characterizer (KPIC)", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High contrast imaging, High resolution spectroscopy, Exoplanet characterization, Doppler imaging", "note": "\u00a9 2017 SPIE.\n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. This work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Finally, we would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 1040029.pdf
", "abstract": "Coupling a high-contrast imaging instrument to a high-resolution spectrograph has the potential to enable the most detailed characterization of exoplanet atmospheres, including spin measurements and Doppler mapping. The high-contrast imaging system serves as a spatial filter to separate the light from the star and the planet while the high-resolution spectrograph acts as a spectral filter, which differentiates between features in the stellar and planetary spectra. The Keck Planet Imager and Characterizer (KPIC) located downstream from the current W. M. Keck II adaptive optics (AO) system will contain a fiber injection unit (FIU) combining a high-contrast imaging system and a fiber feed to Keck's high resolution infrared spectrograph NIRSPEC. Resolved thermal emission from known young giant exoplanets will be injected into a single-mode fiber linked to NIRSPEC, thereby allowing the spectral characterization of their atmospheres. Moreover, the resolution of NIRSPEC (R = 37,500) is high enough to enable spin measurements and Doppler imaging of atmospheric weather phenomenon. The module will be integrated and tested at Caltech before being transferred to Keck in 2018.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-085457592", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-085457592", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274891", "primary_object": { "basename": "1040029.pdf", "url": "https://authors.library.caltech.edu/records/7f1w5-32072/files/1040029.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Mawet, D.; Delorme, J. R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/51ncn-fmp90", "eprint_id": 84870, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:58", "lastmod": "2024-01-14 19:31:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita S." } }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" } ] }, "title": "Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts", "ispublished": "unpub", "full_text_status": "public", "keywords": "HabEx, LUVOIR, Biosignature, Life, High Dispersion Coronagraphy", "note": "\u00a9 2017 SPIE. \n\nWe would like to thank Rowan Swain for proofreading the manuscript.\n\nPublished - 104000Z.pdf
Submitted - 1806.04324.pdf
", "abstract": "A milestone in understanding life in the universe is the detection of biosignature gases in the atmospheres of habitable exoplanets. Future mission concepts under study by the 2020 decadal survey, e.g., HabEx and LUVOIR, have the potential of achieving this goal. We investigate the baseline requirements for detecting four molecular species, H_2O, O_2, CH_4, and CO_2. These molecules are highly relevant to habitability and life activity on Earth and other planets. Through numerical simulations, we find the minimum requirement for spectral resolution (R) and starlight suppression level (C) for a given exposure time. We consider scenarios in which different molecules are detected. For example, R = 6400 (400) and C = 5 \u00d7 10^(\u221210) (2 \u00d7 10^(\u22129)) are required for HabEx (LUVOIR) to detect O_2 and H_2O for an exposure time of 400 hours for an Earth analog around a solar-type star at a distance of 5 pc. The full results are given in Table 2. The impact of exo-zodiacal contamination and thermal background is also discussed.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000Z", "id_number": "CaltechAUTHORS:20180216-134344780", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-134344780", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2275222", "primary_object": { "basename": "104000Z.pdf", "url": "https://authors.library.caltech.edu/records/51ncn-fmp90/files/104000Z.pdf" }, "related_objects": [ { "basename": "1806.04324.pdf", "url": "https://authors.library.caltech.edu/records/51ncn-fmp90/files/1806.04324.pdf" } ], "resource_type": "book_section", "pub_year": "2017", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yffrx-dxb75", "eprint_id": 82070, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:16", "lastmod": "2024-01-14 05:39:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Performance and sensitivity of vortex coronagraphs on segmented space telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2017 SPIE. \n\nWe thank Matthew Bolcar (NASA GSFC) for providing information regarding the LUVOIR telescope concept as well as Laurent Pueyo (STScI) and Kevin Fogarty (JHU) for fruitful discussion regarding optimal vortex coronagraph designs. G. Ruane is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.\n\nPublished - 104000J.pdf
Submitted - 1708.05787.pdf
", "abstract": "The detection of molecular species in the atmospheres of earth-like exoplanets orbiting nearby stars requires an optical system that suppresses starlight and maximizes the sensitivity to the weak planet signals at small angular separations. Achieving sufficient contrast performance on a segmented aperture space telescope is particularly challenging due to unwanted diffraction within the telescope from amplitude and phase discontinuities in the pupil. Apodized vortex coronagraphs are a promising solution that theoretically meet the performance needs for high contrast imaging with future segmented space telescopes. We investigate the sensitivity of apodized vortex coronagraphs to the expected aberrations, including segment co-phasing errors in piston and tip/tilt as well as other low-order and mid-spatial frequency aberrations. Coronagraph designs and their associated telescope requirements are identified for conceptual HabEx and LUVOIR telescope designs.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 104000J", "id_number": "CaltechAUTHORS:20171004-141719560", "isbn": "9781510612570", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VIII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20171004-141719560", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Astronomy and Astrophysics Fellowship", "grant_number": "AST-1602444" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2274508", "primary_object": { "basename": "104000J.pdf", "url": "https://authors.library.caltech.edu/records/yffrx-dxb75/files/104000J.pdf" }, "related_objects": [ { "basename": "1708.05787.pdf", "url": "https://authors.library.caltech.edu/records/yffrx-dxb75/files/1708.05787.pdf" } ], "resource_type": "book_section", "pub_year": "2017", "author_list": "Ruane, Garreth; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/atsgj-5cv40", "eprint_id": 84869, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:52", "lastmod": "2024-01-14 19:31:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "N." } }, { "id": "Xin-Yinzi", "name": { "family": "Xin", "given": "Y." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "J.-R." } }, { "id": "Xuan-Wenhao-Jerry", "name": { "family": "Xuan", "given": "W." }, "orcid": "0000-0002-6618-1137" }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "D." }, "orcid": "0000-0002-1583-2040" }, { "id": "Randolph-M", "name": { "family": "Randolph", "given": "M." } }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "Utilizing active single-mode fiber injection for speckle nulling in exoplanet characterization", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex coronagraph, fiber injection unit, speckle nulling, broadband, spectrograph, exoplanet characterization, instrumentation", "note": "\u00a9 2017 SPIE. \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation.\n\nPublished - 104000Y.pdf
", "abstract": "Despite recent advances in high-contrast imaging techniques, high resolution spectroscopy for characterization of exoplanet atmospheres is still limited by our ability to suppress residual starlight speckles at the planet's location. We have demonstrated a new concept for speckle nulling by injecting directly imaged planet light into a single-mode fiber, linking a high-contrast adaptively-corrected coronagraph to a high-resolution spectrograph (diffraction-limited or not). The restrictions on the incident electric field that will couple into the single-mode fiber give the adaptive optics system additional degrees of freedom to suppress the speckle noise on top of destructive interference. We are able to achieve a starlight suppression gains that are an order of magnitude better than conventional techniques in broadband light with minimal planet throughput losses.", "date": "2017-09-01", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20180216-132039857", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180216-132039857", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2275173", "primary_object": { "basename": "104000Y.pdf", "url": "https://authors.library.caltech.edu/records/atsgj-5cv40/files/104000Y.pdf" }, "resource_type": "book_section", "pub_year": "2017", "author_list": "Klimovich, N.; Xin, Y.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0nyqq-vcj43", "eprint_id": 79529, "eprint_status": "archive", "datestamp": "2023-08-19 04:19:01", "lastmod": "2023-10-26 16:16:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Kastner-J-H", "name": { "family": "Kastner", "given": "J." }, "orcid": "0000-0002-3138-8250" }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "T." }, "orcid": "0000-0001-6126-2467" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda Castell\u00e1", "given": "B." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C." }, "orcid": "0000-0003-2050-1710" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Zhu-Zhaohuan", "name": { "family": "Zhu", "given": "Z." }, "orcid": "0000-0003-3616-6822" }, { "id": "Jenson-Clem-R", "name": { "family": "Jenson-Clem", "given": "R." } }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "Deep Imaging Search for Planets Forming in the TW Hya Protoplanetary Disk with the Keck/NIRC2 Vortex Coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter \u2013 stars: individual (TW Hya) \u2013 stars: pre-main sequence", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2017 May 19; revised 2017 June 19; accepted 2017 June 22; published 2017 July 27. \n\nG.R. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602444. The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. J.H.K. acknowledges support from NASA Exoplanets program grant NNX16AB43G to RIT. Part of this work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under contract with NASA. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. E.C. acknowledges support from NASA through Hubble Fellowship grant HF2-51355 awarded by STScI, which is operated by AURA, Inc. for NASA under contract NAS5-26555, for research carried out at the Jet Propulsion Laboratory, California Institute of Technology. \n\nFacility: Keck:II (NIRC2) - .\n\nPublished - Ruane_2017_AJ_154_73.pdf
Submitted - 1706.07489.pdf
", "abstract": "Distinct gap features in the nearest protoplanetary disk, TW Hya (distance of 59.5 \u00b1 0.9 pc), may be signposts of ongoing planet formation. We performed long-exposure thermal infrared coronagraphic imaging observations to search for accreting planets, especially within dust gaps previously detected in scattered light and submillimeter-wave thermal emission. Three nights of observations with the Keck/NIRC2 vortex coronagraph in L' (3.4\u20134.1 \u03bcm) did not reveal any statistically significant point sources. We thereby set strict upper limits on the masses of non-accreting planets. In the four most prominent disk gaps at 24, 41, 47, and 88 au, we obtain upper mass limits of 1.6\u20132.3, 1.1\u20131.6, 1.1\u20131.5, and 1.0\u20131.2 Jupiter masses (M_J), assuming an age range of 7\u201310 Myr for TW Hya. These limits correspond to the contrast at 95% completeness (true positive fraction of 0.95) with a 1% chance of a false positive within 1'' of the star. We also approximate an upper limit on the product of the planet mass and planetary accretion rate of M_pM \u227e 10^(-8) M^2_j yr^(-1) implying that any putative ~0.1 M J planet, which could be responsible for opening the 24 au gap, is presently accreting at rates insufficient to build up a Jupiter mass within TW Hya's pre-main-sequence lifetime.", "date": "2017-08", "date_type": "published", "publication": "Astronomical Journal", "volume": "154", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 73", "id_number": "CaltechAUTHORS:20170728-084506248", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170728-084506248", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1602444" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA", "grant_number": "NNX16AB43G" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 Fran\u00e7aise" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aa7b81", "primary_object": { "basename": "1706.07489.pdf", "url": "https://authors.library.caltech.edu/records/0nyqq-vcj43/files/1706.07489.pdf" }, "related_objects": [ { "basename": "Ruane_2017_AJ_154_73.pdf", "url": "https://authors.library.caltech.edu/records/0nyqq-vcj43/files/Ruane_2017_AJ_154_73.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Ruane, G.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wagek-x3669", "eprint_id": 78722, "eprint_status": "archive", "datestamp": "2023-08-21 21:23:15", "lastmod": "2023-10-26 00:19:45", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Matthews-E", "name": { "family": "Matthews", "given": "Elisabeth" } }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Kennedy-G-M", "name": { "family": "Kennedy", "given": "Grant" }, "orcid": "0000-0001-6831-7547" }, { "id": "Rizzuto-A-C", "name": { "family": "Rizzuto", "given": "Aaron" }, "orcid": "0000-0001-9982-1332" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Booth-M", "name": { "family": "Booth", "given": "Mark" } }, { "id": "Chen-Christine", "name": { "family": "Chen", "given": "Christine" } }, { "id": "Jang-Condell-Hannah", "name": { "family": "Jang-Condell", "given": "Hannah" } } ] }, "title": "The First Scattered-light Image of the Debris Disk around the Sco\u2013Cen Target HD 129590", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems; stars: early-type; stars: individual (HD 129590)", "note": "\u00a9 2017 American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2017 April 11. Accepted 2017 June 13. Published 2017 June 30. \n\nBased on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 095.C-0549 and 097.C-1019. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. E.M. thanks the University of Exeter for support through a Ph.D. studentship. M.B. acknowledges support from DFG project Kr 2164/15-1. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow.\n\nPublished - Matthews_2017_ApJL_843_L12.pdf
Submitted - 1706.04624.pdf
", "abstract": "We present the first scattered-light image of the debris disk around HD 129590, a ~1.3 M_\u2299 G1V member of the Scorpius\u2013Centaurus association with an age of ~10\u201316 Myr. The debris disk is imaged with the high contrast imaging instrument SPHERE at the Very Large Telescope, and is revealed by both the IRDIS and IFS subsytems, operating in the H and YJ bands respectively. The disk has a high infrared luminosity of L_(IR)/(L)_(star) ~ 5 \u00d7 10^(\u22123), and has been resolved in other studies using ALMA. We detect a nearly edge-on ring, with evidence of an inner clearing. We fit the debris disk using a model characterized by a single bright ring, with radius ~60\u201370 au, in broad agreement with previous analyses of the target SED. The disk is vertically thin, and has an inclination angle of ~75\u00b0. Along with other previously imaged edge-on disks in the Sco\u2013Cen association such as HD 110058, HD 115600, and HD 111520, this disk image will allow of the structure and morphology of very young debris disks, shortly after the epoch of planet formation has ceased.", "date": "2017-07-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "843", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L12", "id_number": "CaltechAUTHORS:20170630-095704999", "issn": "2041-8213", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170630-095704999", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "Kr 2164/15-1" }, { "agency": "Royal Society" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/2041-8213/aa7943", "primary_object": { "basename": "1706.04624.pdf", "url": "https://authors.library.caltech.edu/records/wagek-x3669/files/1706.04624.pdf" }, "related_objects": [ { "basename": "Matthews_2017_ApJL_843_L12.pdf", "url": "https://authors.library.caltech.edu/records/wagek-x3669/files/Matthews_2017_ApJL_843_L12.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Matthews, Elisabeth; Hinkley, Sasha; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/b4yjb-tfa71", "eprint_id": 77565, "eprint_status": "archive", "datestamp": "2023-08-21 21:20:10", "lastmod": "2023-10-25 23:15:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos Alberto" }, "orcid": "0000-0003-2050-1710" }, { "id": "Wertz-O", "name": { "family": "Wertz", "given": "Olivier" }, "orcid": "0000-0003-3849-2285" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Absil-Pierre-Antoine", "name": { "family": "Absil", "given": "Pierre-Antoine" }, "orcid": "0000-0003-2946-4178" }, { "id": "Van-Droogenbroeck-M", "name": { "family": "Van Droogenbroeck", "given": "Marc" } }, { "id": "Cantalloube-F", "name": { "family": "Cantalloube", "given": "Faustine" } }, { "id": "Hinz-P-M", "name": { "family": "Hinz", "given": "Philip M." }, "orcid": "0000-0002-1954-4564" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "Andrew J." }, "orcid": "0000-0001-6098-3924" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "VIP: Vortex Image Processing package for high-contrast direct imaging", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: data analysis; planetary systems; planets and satellites: detection; techniques: high angular resolution; techniques: image processing", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2016 June 23; revised 2017 May 9; accepted 2017 May 15; published 2017 June 13. \n\nThe authors would like to thank the whole python open-source community and the developers of the powerful open-source stack of scientific libraries. Special thanks to the creators of the Ipython Jupyter application. We also thank Elsa Huby, Maddalena Reggiani, and Rebecca Jensen-Clem for useful discussions and early bug reports. Finally, we thank the referee, Tim Brandt, for his constructive questions and valuable comments. The research leading to these results has received funding from the European Research Council Under the European Union's Seventh Framework Program (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action. V.C. acknowledges financial support provided by Millennium Nucleus grant RC130007 (Chilean Ministry of Economy). The LBTI is funded by the National Aeronautics and Space Administration as part of its Exoplanet Exploration Program. The LBT is an international collaboration among institutions in the United States, Italy, and Germany. LBT Corporation partners are The University of Arizona on behalf of the Arizona university system; Instituto Nazionale di Astrofisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. This research was supported by NASA's Origins of Solar Systems Program, grant NNX13AJ17G. \n\nSoftware: numpy (van der Walt et al. 2011), scipy (Jones et al. 2001), matplotlib (Hunter 2007), astropy (Astropy Collaboration et al. 2013), photutils (Bradley et al. 2016), scikit-learn (Pedregosa et al. 2011), pandas (McKinney 2010), scikit-image (van der Walt et al. 2014), emcee (Foreman-Mackey et al. 2013), OpenCV (Bradski 2000), SAOImage DS9, nestle.\n\nPublished - Gomez_Gonzalez_2017_AJ_154_7.pdf
Submitted - 1705.06184.pdf
", "abstract": "We present the Vortex Image Processing (VIP) library, a python package dedicated to astronomical high-contrast imaging. Our package relies on the extensive python stack of scientific libraries and aims to provide a flexible framework for high-contrast data and image processing. In this paper, we describe the capabilities of VIP related to processing image sequences acquired using the angular differential imaging (ADI) observing technique. VIP implements functionalities for building high-contrast data processing pipelines, encompassing pre- and post-processing algorithms, potential source position and flux estimation, and sensitivity curve generation. Among the reference point-spread function subtraction techniques for ADI post-processing, VIP includes several flavors of principal component analysis (PCA) based algorithms, such as annular PCA and incremental PCA algorithms capable of processing big datacubes (of several gigabytes) on a computer with limited memory. Also, we present a novel ADI algorithm based on non-negative matrix factorization, which comes from the same family of low-rank matrix approximations as PCA and provides fairly similar results. We showcase the ADI capabilities of the VIP library using a deep sequence on HR 8799 taken with the LBTI/LMIRCam and its recently commissioned L-band vortex coronagraph. Using VIP, we investigated the presence of additional companions around HR 8799 and did not find any significant additional point source beyond the four known planets. VIP is available at http://github.com/vortex-exoplanet/VIP and is accompanied with Jupyter notebook tutorials illustrating the main functionalities of the library.", "date": "2017-07", "date_type": "published", "publication": "Astronomical Journal", "volume": "154", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 7", "id_number": "CaltechAUTHORS:20170518-102114519", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170518-102114519", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Millennium Nucleus", "grant_number": "RC130007" }, { "agency": "NASA", "grant_number": "NNX13AJ17G" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aa73d7", "primary_object": { "basename": "1705.06184.pdf", "url": "https://authors.library.caltech.edu/records/b4yjb-tfa71/files/1705.06184.pdf" }, "related_objects": [ { "basename": "Gomez_Gonzalez_2017_AJ_154_7.pdf", "url": "https://authors.library.caltech.edu/records/b4yjb-tfa71/files/Gomez_Gonzalez_2017_AJ_154_7.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Gomez Gonzalez, Carlos Alberto; Wertz, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dayyd-jt966", "eprint_id": 77568, "eprint_status": "archive", "datestamp": "2023-08-19 03:19:01", "lastmod": "2024-02-02 21:08:21", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "id": "Blunt-S-C", "name": { "family": "Blunt", "given": "Sarah" }, "orcid": "0000-0002-3199-2888" }, { "id": "Nielsen-E-L", "name": { "family": "Nielsen", "given": "Eric L." }, "orcid": "0000-0001-6975-9056" }, { "id": "Batygin-K", "name": { "family": "Batygin", "given": "Konstantin" }, "orcid": "0000-0002-7094-7908" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "No difference in orbital parameters of RV-detected giant planets between 0.1 and 5 au in single vs multi-stellar systems", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: close \u2013 binaries: eclipsing \u2013 methods: observational \u2013 planetary systems \u2013 planets and satellites: dynamical evolution and stability \u2013 techniques: high angular resolution", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2017 February 11; revised 2017 April 5; accepted 2017 April 6; published 2017 May 4. \n\nWe would like to thank John A Johnson, Christopher Spalding, and Benjamin Montet for helpful discussions. We also appreciate the useful suggestions from the anonymous referee and the statistics editor. This work was supported by NASA grant NNX14AD24G. H.N. is grateful for funding support from the Natural Sciences and Engineering Research Council of Canada and the NASA Earth and Space Science Fellowship Program grant NNX15AR12H. H.A.K. acknowledges support from the Sloan Foundation. E.L.N. and S.C.B. are supported by NASA grant NNX14AJ80G. \n\nThis work was based on observations at the W. M. Keck Observatory granted by the California Institute of Technology. We thank the observers who contributed to the measurements reported here and acknowledge the efforts of the Keck Observatory staff. We extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. \n\nFacility: Keck:II - KECK II Telescope. \n\nSoftware: Astropy (Astropy Collaboration et al. 2013), OFTI (Blunt et al. 2017), emcee (Foreman-Mackey et al. 2013), corner.py (Foreman-Mackey 2016).\n\nPublished - Ngo_2017_AJ_153_242.pdf
Submitted - 1704.02326.pdf
", "abstract": "Our Keck/NIRC2 imaging survey searches for stellar companions around 144 systems with radial velocity (RV) detected giant planets to determine whether stellar binaries influence the planets' orbital parameters. This survey, the largest of its kind to date, finds eight confirmed binary systems and three confirmed triple systems. These include three new multi-stellar systems (HD 30856, HD 86081, and HD 207832) and three multi-stellar systems with newly confirmed common proper motion (HD 43691, HD 116029, and HD 164509). We combine these systems with seven RV planet-hosting multi-stellar systems from the literature in order to test for differences in the properties of planets with semimajor axes ranging between 0.1 and 5 au in single versus multi-stellar systems. We find no evidence that the presence or absence of stellar companions alters the distribution of planet properties in these systems. Although the observed stellar companions might influence the orbits of more distant planetary companions in these systems, our RV observations currently provide only weak constraints on the masses and orbital properties of planets beyond 5 au. In order to aid future efforts to characterize long-period RV companions in these systems, we publish our contrast curves for all 144 targets. Using four years of astrometry for six hierarchical triple star systems hosting giant planets, we fit the orbits of the stellar companions in order to characterize the orbital architecture in these systems. We find that the orbital plane of the secondary and tertiary companions are inconsistent with an edge-on orbit in four out of six cases.", "date": "2017-06", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 242", "id_number": "CaltechAUTHORS:20170518-103324368", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170518-103324368", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX14AD24G" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "NNX15AR12H" }, { "agency": "Alfred P. Sloan Foundation" }, { "agency": "NASA", "grant_number": "NNX14AJ80G" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/aa6cac", "primary_object": { "basename": "1704.02326.pdf", "url": "https://authors.library.caltech.edu/records/dayyd-jt966/files/1704.02326.pdf" }, "related_objects": [ { "basename": "Ngo_2017_AJ_153_242.pdf", "url": "https://authors.library.caltech.edu/records/dayyd-jt966/files/Ngo_2017_AJ_153_242.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Ngo, Henry; Knutson, Heather A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/en4gh-50168", "eprint_id": 78330, "eprint_status": "archive", "datestamp": "2023-08-19 03:21:19", "lastmod": "2024-02-02 21:10:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Crossfield-I-J-M", "name": { "family": "Crossfield", "given": "Ian J. M." }, "orcid": "0000-0002-1835-1891" }, { "id": "Ciardi-D-R", "name": { "family": "Ciardi", "given": "David R." }, "orcid": "0000-0002-5741-3047" }, { "id": "Isaacson-H-T", "name": { "family": "Isaacson", "given": "Howard" }, "orcid": "0000-0002-0531-1073" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Petigura-E-A", "name": { "family": "Petigura", "given": "Erik A." }, "orcid": "0000-0003-0967-2893" }, { "id": "Weiss-L-M", "name": { "family": "Weiss", "given": "Lauren M." }, "orcid": "0000-0002-3725-3058" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Sinukoff-E", "name": { "family": "Sinukoff", "given": "Evan" }, "orcid": "0000-0002-5658-0601" }, { "id": "Schlieder-J-E", "name": { "family": "Schlieder", "given": "Joshua E." }, "orcid": "0000-0001-5347-7062" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "de-Pater-I", "name": { "family": "de Pater", "given": "Imke" }, "orcid": "0000-0002-4278-3168" }, { "id": "de-Kleer-K-R", "name": { "family": "de Kleer", "given": "Katherine" }, "orcid": "0000-0002-9068-3428" }, { "id": "Davies-A-G", "name": { "family": "Davies", "given": "Ashley G." }, "orcid": "0000-0003-1747-8142" }, { "id": "Christiansen-J-L", "name": { "family": "Christiansen", "given": "Jessie L." }, "orcid": "0000-0002-8035-4778" }, { "id": "Dressing-C-D", "name": { "family": "Dressing", "given": "Courtney D." }, "orcid": "0000-0001-8189-0233" }, { "id": "Hirsch-L-A", "name": { "family": "Hirsch", "given": "Lea" }, "orcid": "0000-0001-8058-7443" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" }, { "id": "Kosiarek-M-R", "name": { "family": "Kosiarek", "given": "Molly" }, "orcid": "0000-0002-6115-4359" }, { "id": "Livingston-J-M", "name": { "family": "Livingston", "given": "John" } }, { "id": "Gonzales-E-J", "name": { "family": "Gonzales", "given": "Erica" } }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles A." }, "orcid": "0000-0002-5627-5471" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" } ] }, "title": "Two Small Transiting Planets and a Possible Third Body Orbiting HD 106315", "ispublished": "pub", "full_text_status": "public", "keywords": "eclipses \u2013 stars: individual (HD 106315) \u2013 techniques: photometric \u2013 techniques: spectroscopi", "note": "\u00a9 2017 The American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2017 January 13; revised 2017 February 13; accepted 2017 February 15; published 2017 May 19. \n\nThis work made use of the SIMBAD database (operated at CDS, Strasbourg, France) and NASA's Astrophysics Data System Bibliographic Services. This research has made use of the NASA Exoplanet Archive and the Infrared Science Archive, which are operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration. Portions of this work were performed at the California Institute of Technology under contract with the National Aeronautics and Space Administration. Some of the data presented herein were obtained at the WM Keck Observatory (which is operated as a scientific partnership among Caltech, UC, and NASA). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. I.J.M.C. was supported for this work under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. A.W.H. acknowledges support for this K2 work from a NASA Astrophysics Data Analysis Program grant, support from the K2 Guest Observer Program, and a NASA Key Strategic Mission Support Project. L.M.W. acknowledges support from the Trottier family. \n\nFacility: Kepler, Keck-II (NIRC2), Keck-II (HIRES). \n\nNote added in review:\nWhile preparing this paper, we became aware of another paper describing the identification of HD 106315 as a planet-hosing system (Rodriguez et al. 2017). We are pleased that both groups report consistent results despite the fact that no detailed information was shared prior to submission of the two papers.\n\nPublished - Crossfield_2017_AJ_153_255.pdf
Submitted - 1701.03811.pdf
", "abstract": "The masses, atmospheric makeups, spin\u2013orbit alignments, and system architectures of extrasolar planets can be best studied when the planets orbit bright stars. We report the discovery of three bodies orbiting HD 106315, a bright (V = 8.97 mag) F5 dwarf targeted by our K2 survey for transiting exoplanets. Two small transiting planets are found to have radii 2.23^(+0.30)_(-0.25)R\u2295 and 3.95^(+0.42)_(-0.39)R\u2295 and orbital periods 9.55 days and 21.06 days, respectively. A radial velocity (RV) trend of 0.3 \u00b1 0.1 m s^(\u22121) day^(\u22121) indicates the likely presence of a third body orbiting HD 106315 with period \u2273160 days and mass \u227345 M\u2295. Transits of this object would have depths \u22730.1% and are definitively ruled out. Although the star has v sin i = 13.2 km s^(\u22121), it exhibits a short-timescale RV variability of just 6.4 m s^(\u22121). Thus, it is a good target for RV measurements of the mass and density of the inner two planets and the outer object's orbit and mass. Furthermore, the combination of RV noise and moderate v sin i makes HD 106315 a valuable laboratory for studying the spin\u2013orbit alignment of small planets through the Rossiter\u2013McLaughlin effect. Space-based atmospheric characterization of the two transiting planets via transit and eclipse spectroscopy should also be feasible. This discovery demonstrates again the power of K2 to find compelling exoplanets worthy of future study.", "date": "2017-06", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "6", "publisher": "American Astronomical Society", "pagerange": "Art. No. 255", "id_number": "CaltechAUTHORS:20170619-123025887", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170619-123025887", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Sagan Fellowship" }, { "agency": "Trottier Family Foundation" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/aa6e01", "primary_object": { "basename": "1701.03811.pdf", "url": "https://authors.library.caltech.edu/records/en4gh-50168/files/1701.03811.pdf" }, "related_objects": [ { "basename": "Crossfield_2017_AJ_153_255.pdf", "url": "https://authors.library.caltech.edu/records/en4gh-50168/files/Crossfield_2017_AJ_153_255.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Crossfield, Ian J. M.; Ciardi, David R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kx6wq-q1626", "eprint_id": 77037, "eprint_status": "archive", "datestamp": "2023-08-19 02:51:41", "lastmod": "2023-10-25 17:14:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rappaport-S", "name": { "family": "Rappaport", "given": "S." }, "orcid": "0000-0003-3182-5569" }, { "id": "Vanderburg-A", "name": { "family": "Vanderburg", "given": "A." }, "orcid": "0000-0001-7246-5438" }, { "id": "Borkovits-T", "name": { "family": "Borkovits", "given": "T." }, "orcid": "0000-0002-8806-496X" }, { "id": "Kalomeni-B", "name": { "family": "Kalomeni", "given": "B." } }, { "id": "Halpern-J-P", "name": { "family": "Halpern", "given": "J. P." } }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" }, { "id": "Mace-G-N", "name": { "family": "Mace", "given": "G. N." }, "orcid": "0000-0001-7875-6391" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "B. J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "A. W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Isaacson-H-T", "name": { "family": "Isaacson", "given": "H." }, "orcid": "0000-0002-0531-1073" }, { "id": "Petigura-E-A", "name": { "family": "Petigura", "given": "E. A." }, "orcid": "0000-0003-0967-2893" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Kristiansen-M-H", "name": { "family": "Kristiansen", "given": "M. H." } }, { "id": "Jacobs-T-L", "name": { "family": "Jacobs", "given": "T. L." } }, { "id": "LaCourse-D", "name": { "family": "LaCourse", "given": "D." } }, { "id": "Bieryla-A", "name": { "family": "Bieryla", "given": "A." }, "orcid": "0000-0001-6637-5401" }, { "id": "Forg\u00e1cs-Dajka-E", "name": { "family": "Forg\u00e1cs-Dajka", "given": "E." } }, { "id": "Nelson-L", "name": { "family": "Nelson", "given": "L." } } ] }, "title": "EPIC 220204960: A Quadruple Star System Containing Two Strongly Interacting Eclipsing Binaries", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: close, binaries: eclipsing, binaries: general, binaries: visual, stars: low-mass", "note": "\u00a9 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. \n\nAccepted 2017 January 16. Received 2017 January 16; in original form 2016 December 15. \n\nAV is supported by the National Science Foundation Graduate Research Fellowship, Grant no. DGE 1144152. BK gratefully acknowledges the support provided by the Turkish Scientific and Technical Research Council (T\u00dcB\u0130TAK-112T766 and T\u00dcB\u0130TAK-B\u0130DEP 2219). TB and EF-D acknowledge the financial support of the Hungarian National Research, Development and Innovation Office \u2013 NKFIH Grant OTKA K-113117. MHK, DL and TLJ acknowledge Allan R. Schmitt for making his light-curve examining software 'lctools' freely available. LN thanks Natural Sciences and Engineering Research Council (Canada) for financial support and F. Maisonneuve for his work on the stellar models. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, Inc., under National Aeronautics and Space Administration (NASA) contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts. The MDM Observatory is operated by Dartmouth College, Columbia University, Ohio State University, Ohio University and the University of Michigan. A portion of this work was based on observations at the W. M. Keck Observatory granted by the California Institute of Technology. We thank the observers who contributed to the measurements reported here and acknowledge the efforts of the Keck Observatory staff. We extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. Some of these results made use of the Discovery Channel Telescope at Lowell Observatory. Lowell is a private, non-profit institution dedicated to astrophysical research and public appreciation of astronomy and operates the Discovery Channel Telescope in partnership with Boston University, the University of Maryland, the University of Toledo, Northern Arizona University and Yale University. This latter work used the Immersion Grating Infrared Spectrometer (IGRINS) that was developed under a collaboration between the University of Texas at Austin and the Korea Astronomy and Space Science Institute (KASI) with the financial support of the US National Science Foundation under grant AST-1229522, of the University of Texas at Austin, and of the Korean GMT Project of KASI. Some results are based on data from the Carlsberg Meridian Catalogue 15 Data Access Service at Centro de Astrobiolog\u00eda (CAB, INTA-CSIC) (INTA-CSIC).\n\nPublished - stx143.pdf
Submitted - 1701.05281.pdf
", "abstract": "We present a strongly interacting quadruple system associated with the K2 target EPIC 220204960. The K2 target itself is a Kp = 12.7-mag star at Teff \u2243 6100 K, which we designate as 'B-N' (blue northerly image). The host of the quadruple system, however, is a Kp \u2243 17-mag star with a composite M-star spectrum, which we designate as 'R-S' (red southerly image). With a 3.2-arcsec separation and similar radial velocities and photometric distances, 'B-N' is likely physically associated with 'R-S', making this a quintuple system, but that is incidental to our main claim of a strongly interacting quadruple system in 'R-S'. The two binaries in 'R-S' have orbital periods of 13.27 and 14.41 d, respectively, and each has an inclination angle of \u227389\u00b0. From our analysis of radial-velocity (RV) measurements, and of the photometric light curve, we conclude that all four stars are very similar with masses close to 0.4\u2009M_\u2299. Both of the binaries exhibit significant eclipse-timing variations where those of the primary and secondary eclipses 'diverge' by 0.05 d over the course of the 80-d observations. Via a systematic set of numerical simulations of quadruple systems consisting of two interacting binaries, we conclude that the outer orbital period is very likely to be between 300 and 500 d. If sufficient time is devoted to RV studies of this faint target, the outer orbit should be measurable within a year.", "date": "2017-05", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "467", "number": "2", "publisher": "Royal Astronomical Society", "pagerange": "2160-2179", "id_number": "CaltechAUTHORS:20170428-072710031", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170428-072710031", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144152" }, { "agency": "T\u00fcrkiye Bilimsel ve Teknolojik Ara\u015ft\u0131rma Kurumu (T\u00dcB\u0130TAK)", "grant_number": "T\u00dcB\u0130TAK-112T766" }, { "agency": "T\u00fcrkiye Bilimsel ve Teknolojik Ara\u015ft\u0131rma Kurumu (T\u00dcB\u0130TAK)", "grant_number": "T\u00dcB\u0130TAK-B\u0130DEP 2219" }, { "agency": "Hungarian Scientific Research Fund (OTKA)", "grant_number": "OTKA K-113117" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA Office of Space Science", "grant_number": "NNX09AF08G" }, { "agency": "Caltech" }, { "agency": "NSF", "grant_number": "AST-1229522" }, { "agency": "University of Texas at Austin" }, { "agency": "Korea Astronomy and Space Science Institute (KASI)" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1093/mnras/stx143", "primary_object": { "basename": "1701.05281.pdf", "url": "https://authors.library.caltech.edu/records/kx6wq-q1626/files/1701.05281.pdf" }, "related_objects": [ { "basename": "stx143.pdf", "url": "https://authors.library.caltech.edu/records/kx6wq-q1626/files/stx143.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Rappaport, S.; Vanderburg, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2eewg-arw64", "eprint_id": 68895, "eprint_status": "archive", "datestamp": "2023-08-19 02:47:13", "lastmod": "2023-10-20 15:51:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Pepper-J", "name": { "family": "Pepper", "given": "Joshua" }, "orcid": "0000-0002-3827-8417" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" } ] }, "title": "KELT-11b: A Highly Inflated Sub-Saturn Exoplanet Transiting the V = 8 Subgiant HD 93396", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems \u2013 planets and satellites: detection \u2013 stars: individual (KELT-11) \u2013 techniques: photometric \u2013 techniques: radial velocities", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2016 July 6; revised 2017 March 3; accepted 2017 March 6; published 2017 April 18. \n\nWork by B.S.G. and D.J.S. was partially supported by NSF CAREER Grant AST-1056524. M.B. is supported by a NASA Space Technology Research Fellowship. J.P. would like to thank Stephen Faulkner and Katheryn Kirkwood for help during a difficult time. D.W.L acknowledges partial support from the Kepler Extended Mission under Cooperative Agreement NNX13AB58A with the Smithsonian Astrophysical Observatory. D.B. acknowledges financial support from the National Centre for Competence in Research PlanetS supported by the Swiss National Science Foundation. T.B. was partially supported by funding from the Center for Exoplanets and Habitable Worlds. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. \n\nB.J.F. notes that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. 2014184874. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors(s) and do not necessarily reflect the views of the National Science Foundation. \n\nThis work has made use of NASAs Astrophysics Data System, the Extrasolar Planet Encyclopedia at exoplanet.eu (Schneider et al. 2011), the SIMBAD database operated at CDS, Strasbourg, France, and the VizieR catalog access tool, CDS, Strasbourg, France (Ochsenbein et al. 2000). \n\nCertain calculations in this paper were carried out on the Ruby cluster operated by the Ohio Supercomputer Center (Center 1987). \n\nMINERVA is a collaboration among the Harvard-Smithsonian Center for Astrophysics, The Pennsylvania State University, University of Montana, and University of New South Wales. MINERVA is made possible by generous contributions from its collaborating institutions and Mt. Cuba Astronomical Foundation, The David & Lucile Packard Foundation, National Aeronautics and Space Administration (EPSCOR grant NNX13AM97A), and The Australian Research Council (LIEF grant LE140100050). \n\nThis publication makes use of data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. \n\nThis publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. \n\nThis paper makes use of data from the first public release of the WASP data (Butters et al. 2010) as provided by the WASP consortium and services at the NASA Exoplanet Archive (Akeson et al. 2013), which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program, the Exoplanet Orbit Database, and the Exoplanet Data Explorer at exoplanets.org (Han et al. 2014).\n\nPublished - Pepper_2017_AJ_153_215.pdf
Submitted - 1607.01755v1.pdf
", "abstract": "We report the discovery of a transiting exoplanet, KELT-11b, orbiting the bright (V = 8.0) subgiant HD 93396. A global analysis of the system shows that the host star is an evolved subgiant star with T_(eff) = 5370\u00b151 K, M\u2217 = 1.438^(+0.061)_(\u22120.052) M\u2299, R\u2217 = 2.72^(+0.21)_(\u22120.17) R\u2299, log g\u2217= 3.727^(+0.040)_(\u22120.046), and [Fe/H]= 0.180 \u00b1 0.075. The planet is a low-mass gas giant in a P = 4.736529 \u00b1 0.00006 day orbit, with M_P = 0.195 \u00b1 0.018 M_J, R_P = 1.37^(+0.15)_(\u22120.12) R_J, \u03c1_P = 0.093^(+0.028)_(\u22120.024) g cm^(\u22123) , surface gravity log g_P = 2.407^(+0.080)_(\u22120.086), and equilibrium temperature T_(eq) = 1712^(+51)_(\u221246) K. KELT-11 is the brightest known transiting exoplanet host in the southern hemisphere by more than a magnitude, and is the 6th brightest transit host to date. The planet is one of the most inflated planets known, with an exceptionally large atmospheric scale height (2763 km), and an associated size of the expected atmospheric transmission signal of 5.6%. These attributes make the KELT-11 system a valuable target for follow-up and atmospheric characterization, and it promises to become one of the benchmark systems for the study of inflated exoplanets.", "date": "2017-05", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "5", "publisher": "American Astronomical Society", "pagerange": "Art. No. 215", "id_number": "CaltechAUTHORS:20160707-151707005", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160707-151707005", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-1056524" }, { "agency": "NASA Space Technology Research Fellowship" }, { "agency": "NASA", "grant_number": "NNX13AB58A" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "Center for Exoplanets and Habitable Worlds" }, { "agency": "Pennsylvania State University" }, { "agency": "Eberly College of Science" }, { "agency": "Pennsylvania Space Grant Consortium" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "2014184874" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aa6572", "primary_object": { "basename": "Pepper_2017_AJ_153_215.pdf", "url": "https://authors.library.caltech.edu/records/2eewg-arw64/files/Pepper_2017_AJ_153_215.pdf" }, "related_objects": [ { "basename": "1607.01755v1.pdf", "url": "https://authors.library.caltech.edu/records/2eewg-arw64/files/1607.01755v1.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Pepper, Joshua; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pg1v3-qgj08", "eprint_id": 75536, "eprint_status": "archive", "datestamp": "2023-08-21 20:46:46", "lastmod": "2023-10-25 15:07:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Xuan-Wenhao", "name": { "family": "Xuan", "given": "Wenhao" } }, { "id": "Echeverri-D", "name": { "family": "Echeverri", "given": "Daniel" }, "orcid": "0000-0002-1583-2040" }, { "id": "Klimovich-N-S", "name": { "family": "Klimovich", "given": "Nikita S." } }, { "id": "Randolph-M", "name": { "family": "Randolph", "given": "Michael" } }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "Jason" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Delorme-J-R", "name": { "family": "Delorme", "given": "Jacques-Robert" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Observing Exoplanets with High-Dispersion Coronagraphy. II. Demonstration of an Active Single-Mode Fiber Injection Unit", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs; instrumentation: adaptive optics; instrumentation: spectrographs; techniques: high angular resolution; techniques: spectroscopic", "note": "\u00a9 2017. The American Astronomical Society. \n\nReceived 2016 October 24; revised 2017 February 12; accepted 2017 February 28; published 2017 March 30. \n\nThe authors would like to acknowledge the referee for the thorough review and constructive comments. The authors would like to acknowledge the financial support of the Heising\u2013Simons foundation. \n\nFacility: Caltech's High-Contrast Spectroscopy Testbed for Segmented Telescopes (HCST). -\n\nPublished - Mawet_2017_ApJ_838_92.pdf
Submitted - 1703.00583.pdf
Supplemental Material - apjaa647ff7_video.mp4
", "abstract": "High-dispersion coronagraphy (HDC) optimally combines high contrast imaging techniques such as adaptive optics/wavefront control plus coronagraphy to high spectral resolution spectroscopy. HDC is a critical pathway towards fully characterizing exoplanet atmospheres across a broad range of masses from giant gaseous planets down to Earth-like planets. In addition to determining the molecular composition of exoplanet atmospheres, HDC also enables Doppler mapping of atmosphere inhomogeneities (temperature, clouds, wind), as well as precise measurements of exoplanet rotational velocities. Here, we demonstrate an innovative concept for injecting the directly-imaged planet light into a single-mode fiber, linking a high-contrast adaptively-corrected coronagraph to a high-resolution spectrograph (diffraction-limited or not). Our laboratory demonstration includes three key milestones: close-to-theoretical injection efficiency, accurate pointing and tracking, on-fiber coherent modulation and speckle nulling of spurious starlight signal coupling into the fiber. Using the extreme modal selectivity of single-mode fibers, we also demonstrated speckle suppression gains that outperform conventional image-based speckle nulling by at least two orders of magnitude.", "date": "2017-04-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "838", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 92", "id_number": "CaltechAUTHORS:20170330-075341818", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170330-075341818", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "NSF Astronomy and Astrophysics Fellowship" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-4357/aa647f", "primary_object": { "basename": "apjaa647ff7_video.mp4", "url": "https://authors.library.caltech.edu/records/pg1v3-qgj08/files/apjaa647ff7_video.mp4" }, "related_objects": [ { "basename": "1703.00583.pdf", "url": "https://authors.library.caltech.edu/records/pg1v3-qgj08/files/1703.00583.pdf" }, { "basename": "Mawet_2017_ApJ_838_92.pdf", "url": "https://authors.library.caltech.edu/records/pg1v3-qgj08/files/Mawet_2017_ApJ_838_92.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Mawet, Dimitri; Ruane, Garreth; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/74aw2-1f226", "eprint_id": 75535, "eprint_status": "archive", "datestamp": "2023-08-22 19:56:29", "lastmod": "2023-10-25 15:07:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" } ] }, "title": "Observing Exoplanets with High Dispersion Coronagraphy. I. The scientific potential of current and next-generation large ground and space telescopes", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs; instrumentation: spectrographs; planetary systems; techniques: high angular resolution; techniques: spectroscopic", "note": "\u00a9 2017. The American Astronomical Society. \n\nReceived 2016 October 24; revised 2017 February 15; accepted 2017 February 16; published 2017 March 30. \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. The authors acknowledge ideas and advice from the participants in the Exoplanet Imaging and Characterization: Coherent Differential Imaging and Signal Detection Statistics workshop organized by the W.M. Keck Institute for Space Studies.\n\nPublished - Wang_2017_AJ_153_183.pdf
Submitted - 1703.00582.pdf
", "abstract": "Direct imaging of exoplanets presents a formidable technical challenge owing to the small angular separation and high contrast between exoplanets and their host stars. High Dispersion Coronagraphy (HDC) is a pathway to achieve unprecedented sensitivity to Earth-like planets in the habitable zone. Here, we present a framework to simulate HDC observations and data analyses. The goal of these simulations is to perform a detailed analysis of the trade-off between raw star light suppression and spectral resolution for various instrument configurations, target types, and science cases. We predict the performance of an HDC instrument at Keck observatory for characterizing directly imaged gas-giant planets in near infrared bands. We also simulate HDC observations of an Earth-like planet using next-generation ground-based (TMT) and spaced-base telescopes (HabEx and LUVOIR). We conclude that ground-based ELTs are more suitable for HDC observations of an Earth-like planet than future space-based missions owing to the considerable difference in collecting area. For ground-based telescopes, HDC observations can detect an Earth-like planet in the habitable zone around an M dwarf star at 10^(\u22124) starlight suppression level. Compared to the 10^(\u22127) planet/star contrast, HDC relaxes the starlight suppression requirement by a factor of 10^3. For space-based telescopes, detector noise will be a major limitation at spectral resolutions higher than 10^4. Considering detector noise and speckle chromatic noise, R=400 (1600) is the optimal spectral resolutions for HabEx(LUVOIR). The corresponding starlight suppression requirement to detect a planet with planet/star contrast = 6.1\u00d710^(\u221211) is relaxed by a factor of 10 (100) for HabEx (LUVOIR).", "date": "2017-04", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "4", "publisher": "American Astronomical Society", "pagerange": "Art. No. 183", "id_number": "CaltechAUTHORS:20170330-074837646", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170330-074837646", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "Keck Institute for Space Studies (KISS)" } ] }, "local_group": { "items": [ { "id": "Keck-Institute-for-Space-Studies" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/aa6474", "primary_object": { "basename": "1703.00582.pdf", "url": "https://authors.library.caltech.edu/records/74aw2-1f226/files/1703.00582.pdf" }, "related_objects": [ { "basename": "Wang_2017_AJ_153_183.pdf", "url": "https://authors.library.caltech.edu/records/74aw2-1f226/files/Wang_2017_AJ_153_183.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h5e64-gt991", "eprint_id": 77903, "eprint_status": "archive", "datestamp": "2023-08-19 02:27:12", "lastmod": "2023-10-25 23:33:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "B." } }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" } ] }, "title": "On-sky performance of the QACITS pointing control technique with the Keck/NIRC2 vortex coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 techniques: high angular resolution \u2013 methods: observational", "note": "\u00a9 ESO 2017. \n\nReceived: 12 December 2016. Accepted: 20 January 2017. \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - aa30232-16.pdf
Submitted - 1701.06397.pdf
", "abstract": "Context. A vortex coronagraph is now available for high contrast observations with the Keck/NIRC2 instrument at L band. The vortex coronagraph uses a vortex phase mask in a focal plane and a Lyot stop in a downstream pupil plane to provide high contrast at small angular separations from the observed host star.\nAims. Reaching the optimal performance of the coronagraph requires fine control of the wavefront incident on the phase mask. In particular, centering errors can lead to significant stellar light leakage that degrades the contrast performance and prevents the observation of faint planetary companions around the observed stars. It is thus critical to correct for the possible slow drift of the star image from the phase mask center, generally due to mechanical flexures induced by temperature and/or gravity field variation, or to misalignment between the optics that rotate in pupil tracking mode.\nMethods. A control loop based on the QACITS algorithm for the vortex coronagraph has been developed and deployed for the Keck/NIRC2 instrument. This algorithm executes the entire observing sequence, including the calibration steps, initial centering of the star on the vortex center, and stabilisation during the acquisition of science frames.\nResults. On-sky data show that the QACITS control loop stabilizes the position of the star image down to 2.4 mas rms at a frequency of about 0.02 Hz. However, the accuracy of the estimator is probably limited by a systematic error due to a misalignment of the Lyot stop with respect to the entrance pupil, estimated to be on the order of 4.5 mas. A method to reduce the amplitude of this bias down to 1 mas is proposed.\nConclusions. The QACITS control loop has been successfully implemented and provides a robust method to center and stabilize the star image on the vortex mask. In addition, QACITS ensures a repeatable pointing quality and significantly improves the observing efficiency compared to manual operations. It is now routinely used for vortex coronagraph observations at Keck/NIRC2, providing contrast and angular resolution capabilities suited for exoplanet and disk imaging.", "date": "2017-04", "date_type": "published", "publication": "Astronomy & Astrophysics", "volume": "600", "publisher": "EDP Sciences", "pagerange": "Art. No. A46", "id_number": "CaltechAUTHORS:20170602-063112801", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170602-063112801", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201630232", "primary_object": { "basename": "1701.06397.pdf", "url": "https://authors.library.caltech.edu/records/h5e64-gt991/files/1701.06397.pdf" }, "related_objects": [ { "basename": "aa30232-16.pdf", "url": "https://authors.library.caltech.edu/records/h5e64-gt991/files/aa30232-16.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Huby, E.; Bottom, M.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/v9m9w-5wf62", "eprint_id": 76746, "eprint_status": "archive", "datestamp": "2023-08-19 02:06:45", "lastmod": "2023-10-25 16:49:15", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Prato-L", "name": { "family": "Prato", "given": "Lisa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Time-resolved High Spectral Resolution Observation of 2MASSW J0746425+200032AB", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: spectroscopic \u2013 brown dwarfs \u2013 infrared: stars \u2013 methods: observational \u2013 stars: atmospheres", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2017 January 25; revised 2017 February 23; accepted 2017 February 24; published 2017 March 21. \n\nWe would like to thank Ian Crossfield for sharing the VLT CRIRES data for Luhman 16 AB and for constructive discussions on BD spectral variability and Doppoler imaging. We would also like to thank Courtney Dressing for her suggestion of binning CRIRES data to investigate the impact of reduced spectral resolution on Keck NIRSPEC data. \n\nThe authors would like to acknowledge the financial support of the Heising-Simons foundation. \n\nThe data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. \n\nFacility: Keck:II (NIRSPEC).\n\nPublished - Wang_2017_ApJ_838_35.pdf
Submitted - 1702.07769.pdf
", "abstract": "Many brown dwarfs (BDs) exhibit photometric variability at levels from tenths to tens of percents. The photometric variability is related to magnetic activity or patchy cloud coverage, characteristic of BDs near the L\u2013T transition. Time-resolved spectral monitoring of BDs provides diagnostics of cloud distribution and condensate properties. However, current time-resolved spectral studies of BDs are limited to low spectral resolution (R ~ 100) with the exception of the study of Luhman 16 AB at a resolution of 100,000 using the VLT+CRIRES. This work yielded the first map of BD surface inhomogeneity, highlighting the importance and unique contribution of high spectral resolution observations. Here, we report on the time-resolved high spectral resolution observations of a nearby BD binary, 2MASSW J0746425+200032AB. We find no coherent spectral variability that is modulated with rotation. Based on simulations, we conclude that the coverage of a single spot on 2MASSW J0746425+200032AB is smaller than 1% or 6.25% if spot contrast is 50% or 80% of its surrounding flux, respectively. Future high spectral resolution observations aided by adaptive optics systems can put tighter constraints on the spectral variability of 2MASSW J0746425+200032AB and other nearby BDs.", "date": "2017-03-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "838", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 35", "id_number": "CaltechAUTHORS:20170420-080833167", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170420-080833167", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Heising-Simons Foundation" }, { "agency": "W. M. Keck Foundation" } ] }, "collection": "CaltechAUTHORS", "local_group": { "items": [ { "id": "Astronomy-Department", "value": "Astronomy Department" } ] }, "doi": "10.3847/1538-4357/aa6345", "primary_object": { "basename": "1702.07769.pdf", "url": "https://authors.library.caltech.edu/records/v9m9w-5wf62/files/1702.07769.pdf" }, "related_objects": [ { "basename": "Wang_2017_ApJ_838_35.pdf", "url": "https://authors.library.caltech.edu/records/v9m9w-5wf62/files/Wang_2017_ApJ_838_35.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Wang, Ji; Prato, Lisa; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/crtag-hfp33", "eprint_id": 81912, "eprint_status": "archive", "datestamp": "2023-08-19 01:52:52", "lastmod": "2023-10-17 21:55:15", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "De-Boer-J", "name": { "family": "De Boer", "given": "J." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Canovas-H", "name": { "family": "Canovas", "given": "H." }, "orcid": "0000-0001-7668-8022" }, { "id": "Min-Min", "name": { "family": "Min", "given": "M." }, "orcid": "0000-0003-1519-5069" }, { "id": "Sitko-M-L", "name": { "family": "Sitko", "given": "M." }, "orcid": "0000-0003-1799-1755" }, { "id": "Ginski-C", "name": { "family": "Ginski", "given": "C." } }, { "id": "Jeffers-S-V", "name": { "family": "Jeffers", "given": "S. V." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Rodenhuis-M", "name": { "family": "Rodenhuis", "given": "M." } }, { "id": "Snik-F", "name": { "family": "Snik", "given": "F." } }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "C. U." } } ] }, "title": "BP Piscium: its flaring disc imaged with SPHERE/ZIMPOL", "ispublished": "pub", "full_text_status": "public", "keywords": "polarization \u2013 techniques: high angular resolution \u2013 techniques: polarimetric \u2013 protoplanetary discs \u2013 circumstellar matter \u2013 stars: evolution", "note": "\u00a9 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. \n\nAccepted 2016 October 20. Received 2016 October 20; in original form 2016 May 15. Published: 26 October 2016. \n\nThe observations were taken during SPHERE science verification by the European Southern Observatory, Chile (ESO program ID: 60.A-9375(A)). \n\nWe are thankful to the European Southern Observatory (ESO) support staff on Paranal and the SPHERE science verification team for their support and the successful observations. HC acknowledges support from the Spanish Econom\u00eda, Industria y Competitividad grant AYA 2014-55840-P.\n\nPublished - deBoer2017pL7.pdf
Submitted - 1610.06609.pdf
", "abstract": "Whether BP Piscium (BP Psc) is either a pre-main sequence T Tauri star at d \u2248 80 pc, or a post-main sequence G giant at d \u2248 300 pc is still not clear. As a first-ascent giant, it is the first to be observed with a molecular and dust disc. Alternatively, BP Psc would be among the nearest T Tauri stars with a protoplanetary disc (PPD). We investigate whether the disc geometry resembles typical PPDs, by comparing polarimetric images with radiative transfer models. Our Very Large Telescope/Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE)/Zurich IMaging Polarimeter (ZIMPOL) observations allow us to perform polarimetric differential imaging, reference star differential imaging, and Richardson\u2013Lucy deconvolution. We present the first visible light polarization and intensity images of the disc of BP Psc. Our deconvolution confirms the disc shape as detected before, mainly showing the southern side of the disc. In polarized intensity the disc is imaged at larger detail and also shows the northern side, giving it the typical shape of high-inclination flared discs. We explain the observed disc features by retrieving the large-scale geometry with MCMAX radiative transfer modelling, which yields a strongly flared model, atypical for discs of T Tauri stars.", "date": "2017-03", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society: Letters", "volume": "466", "number": "1", "publisher": "Royal Astronomical Society", "pagerange": "L7-L12", "id_number": "CaltechAUTHORS:20170929-082302721", "issn": "1745-3925", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170929-082302721", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "AYA 2014-55840-P" } ] }, "collection": "CaltechAUTHORS", "local_group": { "items": [ { "id": "Astronomy-Department", "value": "Astronomy Department" } ] }, "doi": "10.1093/mnrasl/slw219", "primary_object": { "basename": "1610.06609.pdf", "url": "https://authors.library.caltech.edu/records/crtag-hfp33/files/1610.06609.pdf" }, "related_objects": [ { "basename": "deBoer2017pL7.pdf", "url": "https://authors.library.caltech.edu/records/crtag-hfp33/files/deBoer2017pL7.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "De Boer, J.; Girard, J. H.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sxk0m-22670", "eprint_id": 74153, "eprint_status": "archive", "datestamp": "2023-08-19 01:44:22", "lastmod": "2023-10-24 22:09:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Oberst-T-E", "name": { "family": "Oberst", "given": "Thomas E." } }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Calchi-Novati-S", "name": { "family": "Calchi Novati", "given": "Sebastiano" }, "orcid": "0000-0002-7669-1069" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "Benjamin J." }, "orcid": "0000-0003-3504-5316" } ] }, "title": "KELT-16b: A Highly Irradiated, Ultra-short Period Hot Jupiter Nearing Tidal Disruption", "ispublished": "pub", "full_text_status": "public", "keywords": "planets and satellites: detection \u2013 planets and satellites: gaseous planets \u2013 methods: observational \u2013\ntechniques: photometric \u2013 techniques: radial velocities", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2016 July 30; revised 2016 December 23; accepted 2016 December 29; published 2017 February 7. \n\nWe thank an anonymous referee for thoughtfully reviewing this manuscript and offering several helpful suggestions. \n\nT.E.O. acknowledges a sabbatical award from Westminster College. B.S.G. and D.J.S. acknowledge support from NSF CAREER Grant AST-1056524. D.A. acknowledges support from an appointment to the NASA Postdoctoral Program at Goddard Space Flight Center, administered by the Universities Space Research Association (USRA) through a contract with NASA. K.K.M. acknowledges the purchase of SDSS filters for Whitin Observatory by the Theodore Dunham, Jr., Grant of the Fund for Astronomical Research. The AO data in this work were obtained at the W.M. Keck Observatory, which was financed by the W.M. Keck Foundation and is operated as a scientific partnership between the California Institute of Technology, the University of California, and NASA. \n\nIn addition, this research has made use of the following services and databases: The Smithsonian Astrophysical Observatory/NASA Astrophysics Data System (SAO/NASA ADS); Vizier (Ochsenbein et al. 2000); The SIMBAD Astronomical Database (Wenger et al. 2000); The Spanish Virtual Observatory (SVO) Filter Profile Service (http://svo2.cab.inta-csic.es/svo/theory/fps3/index.php?mode=browse); and the American Association of Variable Star Observers (AAVSO) Photometric All-Sky Survey (APASS), whose funding is provided by the Robert Martin Ayers Sciences Fund and the AAVSO Endowment (https://www.aavso.org/aavso-photometric-all-sky-survey-data-release-1).\n\nPublished - Oberst_2017_AJ_153_97.pdf
Submitted - 1608.00618.pdf
", "abstract": "We announce the discovery of KELT-16b, a highly irradiated, ultra-short period hot Jupiter transiting the relatively bright (V = 11.7) star TYC 2688-1839-1/KELT-16. A global analysis of the system shows KELT-16 to be an F7V star with T_(eff) = 6236 \u00b1 54 K, log g\u22c6 = 4.253^(+0.031)_(-0.036), [Fe/H] = -0.002^(+0.086)_(-0.085), M\u22c6 = 1.211^(+0.043)_(-0.046) M\u2299, and R\u22c6 = 1.360^(+0.064)_(-0.15)R\u2299. The planet is a relatively high-mass inflated gas giant with M_P = 2.75^(+0.16)_(-0.15)M_J, R_P = 1.415^(+0.084)_(-0.067)R_J, density \u03a1_p = 1.20 \u00b1 0.18 g cm^(\u22123), surface gravity Log g_P = 3.530^(+0.042)_(-0.049), and T_(eq) = 2453^(+55)_(-47)K. The best-fitting linear ephemeris is T_C = 2457247.24791 \u00b1 0.00019 BJD_(TBD) and P = 0.9689951 \u00b1 0.0000024 day. KELT-16b joins WASP-18b, \u221219b, \u221243b, \u2212103b, and HATS-18b as the only giant transiting planets with P < 1 day. Its ultra-short period and high irradiation make it a benchmark target for atmospheric studies by the Hubble Space Telescope, Spitzer, and eventually the James Webb Space Telescope. For example, as a hotter, higher-mass analog of WASP-43b, KELT-16b may feature an atmospheric temperature\u2013pressure inversion and day-to-night temperature swing extreme enough for TiO to rain out at the terminator. KELT-16b could also join WASP-43b in extending tests of the observed mass\u2013metallicity relation of the solar system gas giants to higher masses. KELT-16b currently orbits at a mere ~1.7 Roche radii from its host star, and could be tidally disrupted in as little as a few \u00d7105 years (for a stellar tidal quality factor of Q'* = 10^5). Finally, the likely existence of a widely separated bound stellar companion in the KELT-16 system makes it possible that Kozai\u2013Lidov (KL) oscillations played a role in driving KELT-16b inward to its current precarious orbit.", "date": "2017-03", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "3", "publisher": "American Astronomical Society", "pagerange": "Art. No. 97", "id_number": "CaltechAUTHORS:20170208-100601219", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170208-100601219", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Westminster College" }, { "agency": "NSF", "grant_number": "AST-1056524" }, { "agency": "NASA Postdoctoral Program" }, { "agency": "Fund for Astronomical Research" }, { "agency": "W. M. Keck Foundation" } ] }, "collection": "CaltechAUTHORS", "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)", "value": "Infrared Processing and Analysis Center (IPAC)" }, { "id": "Astronomy-Department", "value": "Astronomy Department" } ] }, "doi": "10.3847/1538-3881/153/3/97", "primary_object": { "basename": "Oberst_2017_AJ_153_97.pdf", "url": "https://authors.library.caltech.edu/records/sxk0m-22670/files/Oberst_2017_AJ_153_97.pdf" }, "related_objects": [ { "basename": "1608.00618.pdf", "url": "https://authors.library.caltech.edu/records/sxk0m-22670/files/1608.00618.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Oberst, Thomas E.; Ngo, Henry; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/afem8-sn211", "eprint_id": 76591, "eprint_status": "archive", "datestamp": "2023-08-19 01:47:11", "lastmod": "2023-10-25 16:08:36", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Schlieder-J-E", "name": { "family": "Schlieder", "given": "J. E." }, "orcid": "0000-0001-5347-7062" } ] }, "title": "Near-infrared scattered light properties of the HR 4796 A dust ring A measured scattering phase function from 13.6\u00b0 to 166.6\u00b0", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution, planet-disk interactions, planets and satellites: detection, scattering, planetary systems", "note": "\u00a9 2017 ESO. \n\nReceived: 26 November 2015. Accepted: 16 December 2016. \n\nJ.M. acknowledges financial support from the ESO fellowship programme. A.M.L. acknowledges the support from the ANR blanche GIPSE (ANR-14-CE33-0018) and the Labex OSUG. L.M. acknowledges support by STFC and ESO through graduate studentships and by the European Union through ERC grant number 279973. We would like to thank ESO staff and technical operators at the Paranal Observatory. We thank M. Meyer and D. Rouan for their valueable suggestions and comments during the review by the SPHERE internal board. We thank P. Delorme and E. Lagadec (SPHERE Data Center) for their work during the data reduction process. We thank V. Faramaz for the discussion on the eccentricity of the disc. SPHERE is an instrument designed and built by a consortium consisting of IPAG (Grenoble, France), MPIA (Heidelberg, Germany), LAM (Marseille, France), LESIA (Paris, France), Laboratoire Lagrange (Nice, France), INAF \u2013 Osservatorio di Padova (Italy), Observatoire de Gen\u00e8ve (Switzerland), ETH Zurich (Switzerland), NOVA (Netherlands), ONERA (France) and ASTRON (Netherlands) in collaboration with ESO. SPHERE was funded by ESO, with additional contributions from CNRS (France), MPIA (Germany), INAF (Italy), FINES (Switzerland) and NOVA (Netherlands). SPHERE also received funding from the European Commission Sixth and Seventh Framework Programmes as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under grant number RII3-Ct-2004-001566 for FP6 (2004\u20132008), grant number 226604 for FP7 (2009\u20132012) and grant number 312430 for FP7 (2013\u20132016).\n\nPublished - aa27838-15.pdf
Submitted - 1701.00750.pdf
", "abstract": "Context. HR\u20094796\u2009A is surrounded by a debris disc, observed in scattered light as an inclined ring with a high surface brightness. Past observations have raised several questions. First, a strong brightness asymmetry detected in polarised reflected light has recently challenged our understanding of scattering by the dust particles in this system. Secondly, the morphology of the ring strongly suggests the presence of planets, although no planets have been detected to date. \n\nAims. We aim here at measuring with high accuracy the morphology and photometry of the ring in scattered light, in order to derive the phase function of the dust and constrain its near-infrared spectral properties. We also want to constrain the presence of planets and set improved constraints on the origin of the observed ring morphology. \n\nMethods. We obtained high-angular resolution coronagraphic images of the circumstellar environment around HR\u20094796\u2009A with VLT/SPHERE during the commissioning of the instrument in May 2014 and during guaranteed-time observations in February 2015. The observations reveal for the first time the entire ring of dust, including the semi-minor axis that was previously hidden either behind the coronagraphic spot or in the speckle noise.\nResults. We determine empirically the scattering phase function of the dust in the H band from 13.6\u00b0 to 166.6\u00b0. It shows a prominent peak of forward scattering, never detected before, for scattering angles below 30\u00b0. We analyse the reflectance spectra of the disc from the 0.95 \u03bcm to 1.6 \u03bcm, confirming the red colour of the dust, and derive detection limits on the presence of planetary mass objects. \n\nConclusions. We confirm which side of the disc is inclined towards the Earth. The analysis of the phase function, especially below 45\u00b0, suggests that the dust population is dominated by particles much larger than the observation wavelength, of about 20 \u03bcm. Compact Mie grains of this size are incompatible with the spectral energy distribution of the disc, however the observed rise in scattering efficiency beyond 50\u00b0 points towards aggregates which could reconcile both observables. We do not detect companions orbiting the star, but our high-contrast observations provide the most stringent constraints yet on the presence of planets responsible for the morphology of the dust.", "date": "2017-03", "date_type": "published", "publication": "Astronomy & Astrophysics", "volume": "599", "publisher": "EDP Sciences", "pagerange": "Art. No. A108", "id_number": "CaltechAUTHORS:20170417-093723203", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170417-093723203", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR-14-CE33-0018" }, { "agency": "Labex OSUG" }, { "agency": "Science and Technology Facilities Council (STFC)" }, { "agency": "European Research Council (ERC)", "grant_number": "279973" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Max Planck Institute for Astronomy (MPIA)" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "FINES (Switzerland)" }, { "agency": "Nederlandse Onderzoekschool voor de Astronomie (NOVA)" }, { "agency": "European Commission", "grant_number": "RII3-Ct-2004-001566" }, { "agency": "European Research Council (ERC)", "grant_number": "226604" }, { "agency": "European Research Council (ERC)", "grant_number": "312430" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201527838", "primary_object": { "basename": "1701.00750.pdf", "url": "https://authors.library.caltech.edu/records/afem8-sn211/files/1701.00750.pdf" }, "related_objects": [ { "basename": "aa27838-15.pdf", "url": "https://authors.library.caltech.edu/records/afem8-sn211/files/aa27838-15.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Milli, J.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ytcg5-bpg58", "eprint_id": 76634, "eprint_status": "archive", "datestamp": "2023-08-19 01:26:33", "lastmod": "2023-10-25 16:10:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wertz-O", "name": { "family": "Wertz", "given": "O." }, "orcid": "0000-0003-3849-2285" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C. A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" } ] }, "title": "VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy Orbital architecture analysis with PyAstrOFit", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems stars: individual: HR8799 methods: data analysis", "note": "\u00a9 2017 ESO. \n\nReceived: 15 April 2016. Accepted: 7 October 2016. Published online: 06 February 2017. \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - aa28730-16.pdf
Submitted - 1610.04014.pdf
", "abstract": "Context. HR8799 is orbited by at least four giant planets, making it a prime target for the recently commissioned Spectro-Polarimetric High-contrast Exoplanet REsearch (VLT/SPHERE). As such, it was observed on five consecutive nights during the SPHERE science verification in December 2014.\nAims. We aim to take full advantage of the SPHERE capabilities to derive accurate astrometric measurements based on H-band images acquired with the Infra-Red Dual-band Imaging and Spectroscopy (IRDIS) subsystem, and to explore the ultimate astrometric performance of SPHERE in this observing mode. We also aim to present a detailed analysis of the orbital parameters for the four planets.\nMethods. We performed thorough post-processing of the IRDIS images with the Vortex Imaging Processing (VIP) package to derive a robust astrometric measurement for the four planets. This includes the identification and careful evaluation of the different contributions to the error budget, including systematic errors. Combining our astrometric measurements with the ones previously published in the literature, we constrain the orbital parameters of the four planets using PyAstrOFit, our new open-source python package dedicated to orbital fitting using Bayesian inference with Monte-Carlo Markov Chain sampling.\nResults. We report the astrometric positions for epoch 2014.93 with an accuracy down to 2.0 mas, mainly limited by the astrometric calibration of IRDIS. For each planet, we derive the posterior probability density functions for the six Keplerian elements and identify sets of highly probable orbits. For planet d, there is clear evidence for nonzero eccentricity (e ~ 0.35), without completely excluding solutions with smaller eccentricities. The three other planets are consistent with circular orbits, although their probability distributions spread beyond e = 0.2, and show a peak at e \u2243 0.1 for planet e. The four planets have consistent inclinations of approximately 30\u00b0 with respect to the sky plane, but the confidence intervals for the longitude of the ascending node are disjointed for planets b and c, and we find tentative evidence for non-coplanarity between planets b and c at the 2\u03c3 level.", "date": "2017-02-06", "date_type": "published", "publication": "Astronomy & Astrophysics", "volume": "598", "publisher": "EDP Sciences", "pagerange": "Art. No. A83", "id_number": "CaltechAUTHORS:20170418-110403489", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170418-110403489", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.1051/0004-6361/201628730", "primary_object": { "basename": "1610.04014.pdf", "url": "https://authors.library.caltech.edu/records/ytcg5-bpg58/files/1610.04014.pdf" }, "related_objects": [ { "basename": "aa28730-16.pdf", "url": "https://authors.library.caltech.edu/records/ytcg5-bpg58/files/aa28730-16.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Wertz, O.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0c8v6-43k34", "eprint_id": 73359, "eprint_status": "archive", "datestamp": "2023-08-19 01:03:00", "lastmod": "2023-10-24 15:15:23", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "First Scattered-light Images of the Gas-rich Debris Disk around 49 Ceti", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter \u2013 stars: individual (49 Ceti) \u2013 techniques: image processing", "note": "\u00a9 2017 The American Astronomical Society. \n\nReceived 2016 November 9; revised 2016 December 19; accepted 2016 December 19; published 2017 January 9. \n\nE.C. acknowledges support from NASA through Hubble Fellowship grant HST-HF2-51355 awarded by STScI, operated by AURA, Inc. under contract NAS5-26555, and support from HST-AR-12652, for research carried out at the Jet Propulsion Laboratory, California Institute of Technology. J.M. acknowledges ESO through the ESO fellowship program. M.B. acknowledges support from DFG project Kr 2164/15-1. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. C.d.B. is supported by Mexican CONACyT research grant CB-2012-183007. L.M. acknowledges support by STFC through a graduate studentship. J.C.A. acknowledges support by the Programme National de Plan\u00e9tologie. We acknowledge support by the European Union through ERC grant 337569 for O.A. and C.A.G.G. and grant 279973 for M.W. and L.M.\n\nPublished - Choquet_2017_ApJL_834_L12.pdf
Submitted - 1612.07320v1.pdf
", "abstract": "We present the first scattered-light images of the debris disk around 49 Ceti, a ~40 Myr A1 main-sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and molecular gas. The outer disk is revealed in reprocessed archival Hubble Space Telescope NICMOS-F110W images, as well as new coronagraphic H-band images from the Very Large Telescope SPHERE instrument. The disk extends from 1\".1 (65 au) to 4\".6 (250 au) and is seen at an inclination of 73\u00b0, which refines previous measurements at lower angular resolution. We also report no companion detection larger than 3 M_(Jup) at projected separations beyond 20 au from the star (0\".34). Comparison between the F110W and H-band images is consistent with a gray color of 49 Ceti's dust, indicating grains larger than \u22732 \u03bcm. Our photometric measurements indicate a scattering efficiency/infrared excess ratio of 0.2\u20130.4, relatively low compared to other characterized debris disks. We find that 49 Ceti presents morphological and scattering properties very similar to the gas-rich HD 131835 system. From our constraint on the disk inclination we find that the atomic gas previously detected in absorption must extend to the inner disk, and that the latter must be depleted of CO gas. Building on previous studies, we propose a schematic view of the system describing the dust and gas structure around 49 Ceti and hypothetical scenarios for the gas nature and origin.", "date": "2017-01-10", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "834", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. L12", "id_number": "CaltechAUTHORS:20170110-072851219", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170110-072851219", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51355" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "HST-AR-12652" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "Kr 2164/15-1" }, { "agency": "Royal Society" }, { "agency": "Consejo Nacional de Ciencia y Tecnolog\u00eda (CONACYT)", "grant_number": "CB-2012-183007" }, { "agency": "Science and Technology Facilities Council (STFC)" }, { "agency": "Programme National de Plan\u00e9tologie" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "European Research Council (ERC)", "grant_number": "27997" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/2041-8213/834/2/L12", "primary_object": { "basename": "1612.07320v1.pdf", "url": "https://authors.library.caltech.edu/records/0c8v6-43k34/files/1612.07320v1.pdf" }, "related_objects": [ { "basename": "Choquet_2017_ApJL_834_L12.pdf", "url": "https://authors.library.caltech.edu/records/0c8v6-43k34/files/Choquet_2017_ApJL_834_L12.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Choquet, \u00c9lodie and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/00smb-v2960", "eprint_id": 73205, "eprint_status": "archive", "datestamp": "2023-08-22 19:24:47", "lastmod": "2023-10-24 15:07:38", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "Bruno" } }, { "id": "Lebreton-J", "name": { "family": "Lebreton", "given": "J\u00e9r\u00e9my" }, "orcid": "0000-0003-1476-5963" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Wertz-O", "name": { "family": "Wertz", "given": "Olivier" }, "orcid": "0000-0003-3849-2285" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "Aissa" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Pinte-C", "name": { "family": "Pinte", "given": "Christophe" }, "orcid": "0000-0001-5907-5179" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } } ] }, "title": "Characterization of the Inner Disk around HD 141569 A from Keck/NIRC2 L-Band Vortex Coronagraphy", "ispublished": "pub", "full_text_status": "public", "keywords": "planet\u2013disk interactions; planetary systems; planets and satellites: formation; protoplanetary disks; stars: pre-main sequence; stars: variables: T Tauri, Herbig Ae/Be", "note": "\u00a9 2017. The American Astronomical Society. \n\nReceived 2016 September 22; revised 2016 October 31; accepted 2016 November 16; published 2017 January 4. \n\nBased on observations made at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. We would like to acknowledge J.-C. Augereau for the development and the sharing of the GRaTer disk modeling tool. Support for this work was provided by NASA through Hubble Fellowship grant #HST-HF2-51355.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. \n\nFacilities: W.M. Keck Observatory - , Keck II - . \n\nSoftware: GRaTer (Augereau et al. 1999; Lebreton et al. 2012), MCFOST (Pinte et al. 2006, 2009).\n\nPublished - Mawet_2017_AJ_153_44.pdf
", "abstract": "HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phase. Here, we present a new image of the third inner disk component of HD 141569 A made in the L' band (3.8 \u03bcm) during the commissioning of the vector vortex coronagraph that has recently been installed in the near-infrared imager and spectrograph NIRC2 behind the W.M. Keck Observatory Keck II adaptive optics system. We used reference point-spread function subtraction, which reveals the innermost disk component from the inner working distance of sime23 au and up to \u224370 au. The spatial scale of our detection roughly corresponds to the optical and near-infrared scattered light, thermal Q, N, and 8.6 \u03bcm PAH emission reported earlier. We also see an outward progression in dust location from the L' band to the H band (Very Large Telescope/SPHERE image) to the visible (Hubble Space Telescope (HST)/STIS image), which is likely indicative of dust blowout. The warm disk component is nested deep inside the two outer belts imaged by HST-NICMOS in 1999 (at 406 and 245 au, respectively). We fit our new L'-band image and spectral energy distribution of HD 141569 A with the radiative transfer code MCFOST. Our best-fit models favor pure olivine grains and are consistent with the composition of the outer belts. While our image shows a putative very faint point-like clump or source embedded in the inner disk, we did not detect any true companion within the gap between the inner disk and the first outer ring, at a sensitivity of a few Jupiter masses.", "date": "2017-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 44", "id_number": "CaltechAUTHORS:20170104-111050993", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170104-111050993", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51355.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/153/1/44", "primary_object": { "basename": "Mawet_2017_AJ_153_44.pdf", "url": "https://authors.library.caltech.edu/records/00smb-v2960/files/Mawet_2017_AJ_153_44.pdf" }, "resource_type": "article", "pub_year": "2017", "author_list": "Mawet, Dimitri; Choquet, \u00c9lodie; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yt9yd-3vq45", "eprint_id": 75033, "eprint_status": "archive", "datestamp": "2023-08-19 00:52:05", "lastmod": "2023-10-25 14:41:06", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD\u2009206893", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 circumstellar matter \u2013 planet-disk interactions \u2013 planetary systems", "note": "\u00a9 2016 ESO. \n\nReceived: 15 October 2016; Accepted: 28 November 2016; Published online 19 December 2016. \n\nJ.M. is supported by the ESO fellowship programme. He thanks R. Galicher for his re-reduction of the NIRI data, and O. Wertz for his help with VIP and NEGFC. E.C. is supported by NASA through Hubble Fellowship grant HST-HF2-51355 and HST-AR-12652 awarded by STScI, operated by the AURA, Inc., for NASA under contract NAS5-26555. O.A. is a F.R.S.-FNRS Research Associate. The research leading to these results was partly funded by the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569), and by the French Community of Belgium through an ARC grant for Concerted Research Action. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. M.C.W. and L.M. are supported by the European Union through ERC grant 279973. V.C. acknowledges J. Smoker and M. Espinoza for their help with NaCo. V.C. is supported by the Millennium Science Initiative (Chilean Ministry of Economy) through grant RC130007. C.d.B. acknowledges support from the Mexican CONACyT research grant CB-2012-183007.\n\nPublished - aa29908-16.pdf
Submitted - 1612.00333.pdf
", "abstract": "Aims. Uncovering the ingredients and the architecture of planetary systems is a very active field of research that has fuelled many new theories on giant planet formation, migration, composition, and interaction with the circumstellar environment. We aim at discovering and studying new such systems, to further expand our knowledge of how low-mass companions form and evolve. \n\nMethods. We obtained high-contrast H-band images of the circumstellar environment of the F5V star HD\u2009206893, known to host a debris disc never detected in scattered light. These observations are part of the SPHERE High Angular Resolution Debris Disc Survey (SHARDDS) using the InfraRed Dual-band Imager and Spectrograph (IRDIS) installed on VLT/SPHERE.\nResults. We report the detection of a source with a contrast of 3.6 \u00d7 10^(-5) in the H-band, orbiting at a projected separation of 270 milliarcsec or 10\u2009au, corresponding to a mass in the range 24 to 73 M_(Jup) for an age of the system in the range 0.2 to 2 Gyr. The detection was confirmed ten months later with VLT/NaCo, ruling out a background object with no proper motion. A faint extended emission compatible with the disc scattered light signal is also observed. \n\nConclusions. The detection of a low-mass companion inside a massive debris disc makes this system an analog of other young planetary systems such as \u03b2 Pictoris, HR\u20098799 or HD\u200995086 and requires now further characterisation of both components to understand their interactions.", "date": "2017-01", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "597", "publisher": "EDP Sciences", "pagerange": "Art. No. L2", "id_number": "CaltechAUTHORS:20170310-131531783", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170310-131531783", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51355" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-AR-12652" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Royal Society" }, { "agency": "European Research Council", "grant_number": "279973" }, { "agency": "Ministry of Economy (Chile)", "grant_number": "RC130007" }, { "agency": "Consejo Nacional de Ciencia y Tecnolog\u00eda (CONACYT)", "grant_number": "CB-2012-183007" } ] }, "collection": "CaltechAUTHORS", "local_group": { "items": [ { "id": "Astronomy-Department", "value": "Astronomy Department" } ] }, "doi": "10.1051/0004-6361/201629908", "primary_object": { "basename": "aa29908-16.pdf", "url": "https://authors.library.caltech.edu/records/yt9yd-3vq45/files/aa29908-16.pdf" }, "related_objects": [ { "basename": "1612.00333.pdf", "url": "https://authors.library.caltech.edu/records/yt9yd-3vq45/files/1612.00333.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Milli, J. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/scf9s-pgv03", "eprint_id": 68902, "eprint_status": "archive", "datestamp": "2023-08-19 00:44:15", "lastmod": "2023-10-20 16:18:45", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bayliss-D", "name": { "family": "Bayliss", "given": "D." }, "orcid": "0000-0001-6023-1335" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "B." }, "orcid": "0000-0003-3504-5316" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" }, { "id": "Petigura-E-A", "name": { "family": "Petigura", "given": "E." }, "orcid": "0000-0003-0967-2893" }, { "id": "Fulton-B-J", "name": { "family": "Fulton", "given": "B." }, "orcid": "0000-0003-3504-5316" } ] }, "title": "EPIC 201702477b: A Transiting Brown Dwarf from K2 in a 41 day Orbit", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems \u2013 techniques: photometric \u2013 techniques: spectroscopic", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2016 June 3; revised 2016 September 29; accepted 2016 October 14; published 2016 December 20. \n\nThis work has been carried out within the framework of the National Centre for Competence in Research \"PlanetS\" supported by the Swiss National Science Foundation (SNSF). This paper includes data collected by the K2 mission. Funding for the K2 mission is provided by the NASA Science Mission directorate. This paper makes use of data and services from NASA Exoplanet Archive (Akeson et al. 2013), which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. We are grateful to our colleagues who have performed some of the observations presented here with the HARPS spectrograph: F. Motalebi, A. Wyttenbach, and B. Lavie. The Porto group acknowledges the support from the Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, FCT (Portugal) in the form of the grants, projects, and contracts UID/FIS/04434/2013 (POCI-01-0145-FEDER-007672), PTDC/FIS-AST/1526/2014 (POCI-01-0145-FEDER-016886), IF/00169/2012, IF/00028/2014, IF/01312/2014 and POPH/FSE (EC) by FEDER funding through the Programa Operacional de Factores de Competitividade\u2014COMPETE. Partly based on observations made at Observatoire de Haute Provence (CNRS), France and with ESO Telescopes at the La Silla Paranal Observatory under programme ID 096.C-0657. Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. A.S. is supported by the European Union under a Marie Curie Intra-European Fellowship for Career Development with reference FP7-PEOPLE-2013-IEF, number 627202. J.L.-B. acknowledges financial support from the Marie Curie Actions of the European Commission (FP7-COFUND) and the Spanish grant AYA2012-38897-C02-01. J.M.A. acknowledges funding from the European Research Council under the ERC Grant Agreement n. 337591-ExTrA. D.J.A. and D.P. acknowledge funding from the European Union Seventh Framework programme (FP7/2007-2013) under grant agreement No. 313014 (ETAEARTH). O.D. acknowledges support by CNES through contract 567133. S.C.C.B. acknowledges support by the Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, (FCT) through the Investigador FCT Contract No. IF/01312/2014 and the grant reference PTDC/FIS- AST/1526/2014. K.H. and A.C.C. acknowledge support from UK Science and Technology Facilities Council (STFC) grant ST/M001296/1. D. Dragomir acknowledges support provided by NASA through Hubble Fellowship grant HST-HF2-51372.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. D.J.A.B. acknowledges support from the UKSA and the University of Warwick. B.J.F. notes that this material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. 2014184874. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors(s) and do not necessarily reflect the views of the National Science Foundation. W.D.C. acknowledges support from NASA Grants NNX15AV58G and NNX16AE70G. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1144469. This work was performed in part under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. Facilities: CAO:2.2m (AstraLux) - , ESO:3.6m (HARPS) - , K2 - , Keck:II (NIRC2) - , Keck:I (HIRES) - , LCOGT - , OHP:1.93m (SOPHIE) - , ANU:2.3m (WiFeS).\n\nPublished - Bayliss_2017_AJ_153_15.pdf
Submitted - 1606.04047.pdf
", "abstract": "We report the discovery of EPIC 201702477b, a transiting brown dwarf in a long period (40.73691 \u00b1 0.00037 day) and eccentric (e = 0.2281 \u00b1 0.0026) orbit. This system was initially reported as a planetary candidate based on two transit events seen in K2 Campaign 1 photometry and later validated as an exoplanet candidate. We confirm the transit and refine the ephemeris with two subsequent ground-based detections of the transit using the Las Cumbres Observatory Global Telescope 1 m telescope network. We rule out any transit timing variations above the level of ~30 s. Using high precision radial velocity measurements from HARPS and SOPHIE we identify the transiting companion as a brown dwarf with a mass, radius, and bulk density of 66.9 \u00b1 1.7 M_J, 0.757 \u00b1 0.065 R_J, and 191 \u00b1 51 g cm^(\u22123) respectively. EPIC 201702477b is the smallest radius brown dwarf yet discovered, with a mass just below the H-burning limit. It has the highest density of any planet, substellar mass object, or main-sequence star discovered so far. We find evidence in the set of known transiting brown dwarfs for two populations of objects\u2014high mass brown dwarfs and low mass brown dwarfs. The higher-mass population have radii in very close agreement to theoretical models, and show a lower-mass limit around 60 M_J. This may be the signature of mass-dependent ejection of systems during the formation process.", "date": "2017-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 15", "id_number": "CaltechAUTHORS:20160708-072044484", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160708-072044484", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "UID/FIS/04434/2013" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "POCI-01-0145-FEDER-007672" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/FIS-AST/1526/2014" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "POCI-01-0145-FEDER-016886" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "IF/00169/2012" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "IF/00028/2014" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "IF/01312/2014" }, { "agency": "Fonds Europ\u00e9en de D\u00e9veloppement \u00c9conomique et R\u00e9gional (FEDER)" }, { "agency": "W. M. Keck Foundation" }, { "agency": "Marie Curie Fellowship", "grant_number": "627202" }, { "agency": "Ministerio de Econom\u00eda y Competitividad (MINECO)", "grant_number": "AYA2012-38897-C02-01" }, { "agency": "European Research Council (ERC)", "grant_number": "337591-ExTrA" }, { "agency": "European Research Council (ERC)", "grant_number": "313014" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)", "grant_number": "567133" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/M001296/1" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51372.001-A" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "United Kingdom Space Agency (UKSA)" }, { "agency": "University of Warwick" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "2014184874" }, { "agency": "NASA", "grant_number": "NNX15AV58G" }, { "agency": "NASA", "grant_number": "NNX16AE70G" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144469" } ] }, "collection": "CaltechAUTHORS", "local_group": { "items": [ { "id": "Astronomy-Department", "value": "Astronomy Department" } ] }, "doi": "10.3847/1538-3881/153/1/15", "primary_object": { "basename": "Bayliss_2017_AJ_153_15.pdf", "url": "https://authors.library.caltech.edu/records/scf9s-pgv03/files/Bayliss_2017_AJ_153_15.pdf" }, "related_objects": [ { "basename": "1606.04047.pdf", "url": "https://authors.library.caltech.edu/records/scf9s-pgv03/files/1606.04047.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Bayliss, D.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kp66a-vwa71", "eprint_id": 73219, "eprint_status": "archive", "datestamp": "2023-08-22 19:24:57", "lastmod": "2024-02-02 21:10:52", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cartier-K-M-S", "name": { "family": "Cartier", "given": "Kimberly M. S." }, "orcid": "0000-0001-8213-1597" }, { "id": "Beatty-T-G", "name": { "family": "Beatty", "given": "Thomas G." }, "orcid": "0000-0002-9539-4203" }, { "id": "Zhao-Ming", "name": { "family": "Zhao", "given": "Ming" }, "orcid": "0000-0002-4258-9517" }, { "id": "Line-M-R", "name": { "family": "Line", "given": "Michael" }, "orcid": "0000-0002-2338-476X" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stassun-K-G", "name": { "family": "Stassun", "given": "Keivan G." }, "orcid": "0000-0002-3481-9052" }, { "id": "Wright-J-T", "name": { "family": "Wright", "given": "Jason T." }, "orcid": "0000-0001-6160-5888" }, { "id": "Kreidberg-L", "name": { "family": "Kreidberg", "given": "Laura" }, "orcid": "0000-0003-0514-1147" }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "Jonathan" }, "orcid": "0000-0002-9843-4354" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather" }, "orcid": "0000-0002-5375-4725" } ] }, "title": "Near-infrared Emission Spectrum of WASP-103b Using Hubble Space Telescope/Wide Field Camera 3", "ispublished": "pub", "full_text_status": "public", "keywords": "eclipses; planetary systems; planets and satellites: atmospheres; techniques: photometric; techniques: spectroscopic", "note": "\u00a9 2016. The American Astronomical Society. \n\nReceived 2016 October 3; revised 2016 November 22; accepted 2016 November 25; published 2016 December 29. \n\nThis work is partially funded by Hubble Space Telescope grants HST-GO-13660.005 (PI Wright) and HST-GO-13660.001-A (PI Zhao), and partially supported by funding from the Center for Exoplanets and Habitable Worlds. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. Some of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. We gratefully acknowledge the use of SOA/NASA ADS, NASA, and STScI resources. \n\nFacilities: HST (WFC3), Keck (NIRC2). \n\nBased on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555.\n\nPublished - Cartier_2017_AJ_153_34.pdf
", "abstract": "We present here our observations and analysis of the dayside emission spectrum of the hot Jupiter WASP-103b. We observed WASP-103b during secondary eclipse using two visits of the Hubble Space Telescope with the G141 grism on Wide Field Camera 3 in spatial scan mode. We generated secondary eclipse light curves of the planet in both blended white-light and spectrally binned wavechannels from 1.1-1.7 \u00b5m and corrected the light curves for flux contamination from a nearby companion star. We modeled the detector systematics and secondary eclipse spectrum using Gaussian process regression and found that the near-IR emission spectrum of WASP-103b is featureless across the observed near-IR region to down to a sensitivity of 175 ppm, and shows a shallow slope toward the red. The atmosphere has a single brightness temperature of T_B = 2890 K across this wavelength range. This region of the spectrum is indistinguishable from isothermal, but may not manifest from a physically isothermal system, i.e., pseudo-isothermal. A solar-metallicity profile with a thermal inversion layer at 10^(\u22122) bar fits the spectrum of WASP-103b with high confidence, as do an isothermal profile with solar metallicity and a monotonically decreasing atmosphere with C/O > 1. The data rule out a monotonically decreasing atmospheric profile with solar composition, and we rule out a low-metallicity decreasing profile as unphysical for this system. The pseudo-isothermal profile could be explained by a thermal inversion layer just above the layer probed by our observations, or by clouds or haze in the upper atmosphere. Transmission spectra at optical wavelengths would allow us to better distinguish between potential atmospheric models.", "date": "2017-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 34", "id_number": "CaltechAUTHORS:20170104-141040048", "issn": "1538-3881", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170104-141040048", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "HST-GO-13660.005" }, { "agency": "NASA", "grant_number": "HST-GO-13660.001-A" }, { "agency": "Center for Exoplanets and Habitable Worlds" }, { "agency": "Eberly College of Science" }, { "agency": "Pennsylvania Space Grant Consortium" }, { "agency": "NASA", "grant_number": "NAS 5-26555" }, { "agency": "NASA", "grant_number": "NNX13AC07G" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" }, { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/1538-3881/153/1/34", "primary_object": { "basename": "Cartier_2017_AJ_153_34.pdf", "url": "https://authors.library.caltech.edu/records/kp66a-vwa71/files/Cartier_2017_AJ_153_34.pdf" }, "resource_type": "article", "pub_year": "2017", "author_list": "Cartier, Kimberly M. S.; Beatty, Thomas G.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6b135-dxy75", "eprint_id": 74164, "eprint_status": "archive", "datestamp": "2023-08-19 00:49:24", "lastmod": "2023-10-24 22:09:48", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Malo-Lison", "name": { "family": "Malo", "given": "Lison" } }, { "id": "Mace-G-N", "name": { "family": "Mace", "given": "Gregory N." }, "orcid": "0000-0001-7875-6391" }, { "id": "McLane-J-N", "name": { "family": "McLane", "given": "Jacob N." } }, { "id": "Lu-Jessica-R", "name": { "family": "Lu", "given": "Jessica R." }, "orcid": "0000-0001-9611-0009" }, { "id": "Tristan-I-I", "name": { "family": "Tristan", "given": "Isaiah I." } }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne A." } }, { "id": "Shkolnik-E-L", "name": { "family": "Shkolnik", "given": "Evgenya L." }, "orcid": "0000-0002-7260-5821" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" }, { "id": "Best-W-M-J", "name": { "family": "Best", "given": "William M. J." }, "orcid": "0000-0003-0562-1511" } ] }, "title": "Planets around Low-mass Stars (PALMS). VI. Discovery of a Remarkably Red Planetary-mass Companion to the AB Dor Moving Group Candidate 2MASS J22362452+4751425", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2016 August 28; revised 2016 October 12; accepted 2016 October 31; published 2016 December 21. \n\nSome of the data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation.\n\nWe thank A. Kraus for helpful discussions about the age of the host star and the entire Keck Observatory staff for their exceptional support. I.T. was supported by the Department of Astronomy at the University of Texas at Austin through the Cox Endowment and Board of Visitors Funds, as well as a NASA WIYN PI Data Award administered by the NASA Exoplanet Science Institute as part of NN-EXPLORE through the scientific partnership of NASA, the National Science Foundation, and the National Optical Astronomy Observatory. This paper includes data taken at The McDonald Observatory of The University of Texas at Austin. It is also based on observations obtained with ESPaDOnS, located at the Canada\u2013France\u2013Hawaii Telescope (CFHT). CFHT is operated by the National Research Council of Canada, the Institut National des Sciences de l'Univers of the Centre National de la Recherche Scientique of France, and the University of Hawai'i. ESPaDOnS is a collaborative project funded by France (CNRS, MENESR, OMP, LATT), Canada (NSERC), CFHT and ESA. We utilized data products from 2MASS, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by NASA and the National Science Foundation. NASA's Astrophysics Data System Bibliographic Services together with the VizieR catalogue access tool and SIMBAD database operated at CDS, Strasbourg, France, were invaluable resources for this work. This work used the Immersion Grating Infrared Spectrometer (IGRINS) that was developed under a collaboration between the University of Texas at Austin and the Korea Astronomy and Space Science Institute (KASI) with the financial support of the US National Science Foundation under grant AST-1229522, to the University of Texas at Austin, and of the Korean GMT Project of KASI. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by NASA. Finally, mahalo nui loa to the kama'\u0101ina of Hawai'i for their support of Keck and the Maunakea observatories. We are grateful to have been able to conduct observations from this mountain. \n\nFacilities: Keck:II (NIRC2) - , Keck:I (OSIRIS) - , Smith (IGRINS) - , IRTF (SpeX) - , CFHT (ESPaDOnS).\n\nPublished - Bowler_2017_AJ_153_18.pdf
Submitted - 1611.00364.pdf
", "abstract": "We report the discovery of an extremely red planetary-mass companion to 2MASS J22362452+4751425, a \u22480.6 M\u2299 late-K dwarf likely belonging to the ~120 Myr AB Doradus moving group. 2M2236+4751 b was identified in multi-epoch NIRC2 adaptive optics imaging at Keck Observatory at a separation of 3.\"7, or 230 \u00b1 20 AU in projection at the kinematic distance of 63 \u00b1 5 pc to its host star. Assuming membership in the AB Dor group, as suggested from its kinematics, the inferred mass of 2M2236+4751 b is 11\u201314 M_(Jup). Follow-up Keck/OSIRIS K-band spectroscopy of the companion reveals strong CO absorption similar to other faint red L dwarfs and lacks signs of methane absorption, despite having an effective temperature of \u2248900\u20131200 K. With a (J\u2013K)_(MKO) color of 2.69 \u00b1 0.12 mag, the near-infrared slope of 2M2236+4751 b is redder than all of the HR 8799 planets and instead resembles the \u224823 Myr isolated planetary-mass object PSO J318.5\u201322, implying that similarly thick photospheric clouds can persist in the atmospheres of giant planets at ages beyond 100 Myr. In near-infrared color\u2013magnitude diagrams, 2M2236+4751 b is located at the tip of the red L dwarf sequence and appears to define the \"elbow\" of the AB Dor substellar isochrone separating low-gravity L dwarfs from the cooler young T dwarf track. 2M2236+4751 b is the reddest substellar companion to a star and will be a valuable benchmark to study the shared atmospheric properties of young low-mass brown dwarfs and extrasolar giant planets.", "date": "2017-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 18", "id_number": "CaltechAUTHORS:20170208-134934181", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170208-134934181", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "University of Texas at Austin" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NSF", "grant_number": "AST-1229522" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" }, { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/153/1/18", "primary_object": { "basename": "1611.00364.pdf", "url": "https://authors.library.caltech.edu/records/6b135-dxy75/files/1611.00364.pdf" }, "related_objects": [ { "basename": "Bowler_2017_AJ_153_18.pdf", "url": "https://authors.library.caltech.edu/records/6b135-dxy75/files/Bowler_2017_AJ_153_18.pdf" } ], "resource_type": "article", "pub_year": "2017", "author_list": "Bowler, Brendan P.; Liu, Michael C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/fkwma-8z123", "eprint_id": 73207, "eprint_status": "archive", "datestamp": "2023-08-19 00:47:54", "lastmod": "2023-10-24 15:07:43", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "B." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Campbell-R", "name": { "family": "Campbell", "given": "R." }, "orcid": "0000-0002-3289-5203" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "B." } }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C." }, "orcid": "0000-0003-2050-1710" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A." } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "K." } }, { "id": "Lilley-S-J", "name": { "family": "Lilley", "given": "S." } }, { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "P." } }, { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "M." }, "orcid": "0000-0003-2911-0898" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Tran-Hien-D", "name": { "family": "Tran", "given": "H." } }, { "id": "Vargas-Catal\u00e1n-E", "name": { "family": "Vargas Catal\u00e1n", "given": "E." } }, { "id": "Wertz-O", "name": { "family": "Wertz", "given": "O." }, "orcid": "0000-0003-3849-2285" } ] }, "title": "The W. M. Keck Observatory Infrared Vortex Coronagraph and a First Image of HIP 79124 B", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics", "note": "\u00a9 2017. The American Astronomical Society. \n\nReceived 2016 August 3; revised 2016 October 26; accepted 2016 November 21; published 2017 January 4. \n\nWe thank the Keck Science Steering Committee for their approval of this project, and especially J. Cohen for her support in getting this project off the drawing board. We also thank the director of the Caltech Optical Observatories, Shri Kulkarni, for providing test time for this new mode. Finally, we thank the W.M. Keck Observatory staff for their able and enthusiastic assistance with the observations. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569), the French Community of Belgium through an ARC grant for Concerted Research Action, and the Swedish Research Council (VR) through project grant 621-2014-5959. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.\n\nPublished - Serabyn_2017_AJ_153_43.pdf
", "abstract": "An optical vortex coronagraph has been implemented within the NIRC2 camera on the Keck II telescope and used to carry out on-sky tests and observations. The development of this new L'-band observational mode is described, and an initial demonstration of the new capability is presented: a resolved image of the low-mass companion to HIP 79124, which had previously been detected by means of interferometry. With HIP 79124 B at a projected separation of 186.5 mas, both the small inner working angle of the vortex coronagraph and the related imaging improvements were crucial in imaging this close companion directly. Due to higher Strehl ratios and more relaxed contrasts in L' band versus H band, this new coronagraphic capability will enable high-contrast, small-angle observations of nearby young exoplanets and disks on a par with those of shorter-wavelength extreme adaptive optics coronagraphs.", "date": "2017-01", "date_type": "published", "publication": "Astronomical Journal", "volume": "153", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. no. 43", "id_number": "CaltechAUTHORS:20170104-112311784", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170104-112311784", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Swedish Research Council", "grant_number": "621-2014-5959" }, { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Astronomy-Department" } ] }, "doi": "10.3847/1538-3881/153/1/43", "primary_object": { "basename": "Serabyn_2017_AJ_153_43.pdf", "url": "https://authors.library.caltech.edu/records/fkwma-8z123/files/Serabyn_2017_AJ_153_43.pdf" }, "resource_type": "article", "pub_year": "2017", "author_list": "Serabyn, E.; Huby, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/eemqj-cqf20", "eprint_id": 73998, "eprint_status": "archive", "datestamp": "2023-08-19 00:17:34", "lastmod": "2023-10-24 21:59:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Kennedy-G-M", "name": { "family": "Kennedy", "given": "Grant" }, "orcid": "0000-0001-6831-7547" }, { "id": "Ertel-S", "name": { "family": "Ertel", "given": "Steve" }, "orcid": "0000-0002-2314-7289" }, { "id": "Matr\u00e0-L", "name": { "family": "Matr\u00e0", "given": "Luca" }, "orcid": "0000-0003-4705-3188" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "del-Burgo-C", "name": { "family": "del Burgo", "given": "Carlos" } }, { "id": "Wyatt-M-C", "name": { "family": "Wyatt", "given": "Mark" } }, { "id": "Pinte-C", "name": { "family": "Pinte", "given": "Christophe" }, "orcid": "0000-0001-5907-5179" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne-Marie" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "Carlos A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Kobayashi-Hiroshi", "name": { "family": "Kobayashi", "given": "Hiroshi" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Dent-W-R-F", "name": { "family": "Dent", "given": "William R. F." } }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "Jean-Charles" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" } ] }, "title": "The SHARDDS survey: First resolved image of the HD 114082 debris disk in the Lower Centaurus Crux with SPHERE", "ispublished": "pub", "full_text_status": "public", "keywords": "stars: individual: HD 114082 techniques: high angular resolution planetary systems", "note": "\u00a9 ESO, 2016. \n\nReceived: 21 September 2016. Accepted: 7 November 2016. \n\nWe would like to thank the ESO staff and the technical operators at the Paranal Observatory. O.A. is F.R.S.-FNRS Research Associate. O.A. and C.G.G. acknowledge support by the European Union through ERC grant number 337569. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. C.B. has been supported by Mexican CONACyT research grant CB-2012-183007. E.C. acknowledges support for this work from NASA through Hubble Fellowship grant HST-HF2-51355 awarded by STScI, which is operated by the AURA, Inc., for NASA under contract NAS5-26555.\n\nPublished - aa29769-16.pdf
Submitted - 1611.05866v1.pdf
", "abstract": "We present the first resolved image of the debris disk around the 16\u2009\u00b1\u20098 Myr old star, HD 114082. The observation was made in the H-band using the SPHERE instrument. The star is at a distance of 92 \u00b1 6 pc in the Lower Centaurus Crux association. Using a Markov chain Monte Carlo analysis, we determined that the debris is likely in the form of a dust ring with an inner edge of 27.7^(+2.8)_(-3.5) au, position angle \u201374.3\u00b0^(+0.5)_(-1.5), and an inclination with respect to the line of sight of 6.7\u00b0^(+3.8)_(-0.4). The disk imaged in scattered light has a surface density that is declining with radius of ~r-4, which is steeper than expected for grain blowout by radiation pressure. We find only marginal evidence (2\u03c3) of eccentricity and rule out planets more massive than 1.0 M_(Jup) orbiting within 1 au of the inner edge of the ring, since such a planet would have disrupted the disk. The disk has roughly the same fractional disk luminosity (L_(disk)/L_\u2217 = 3.3 \u00d7 10^(-3)) as HR 4796 A and \u03b2 Pictoris, however it was not detected by previous instrument facilities most likely because of its small angular size (radius ~0.4\"), low albedo (~0.2), and low scattering efficiency far from the star due to high scattering anisotropy. With the arrival of extreme adaptive optics systems, such as SPHERE and GPI, the morphology of smaller, fainter, and more distant debris disks are being revealed, providing clues to planet-disk interactions in young protoplanetary systems.", "date": "2016-12", "date_type": "published", "publication": "Astronomy & Astrophysics", "volume": "596", "publisher": "EDP Sciences", "pagerange": "Art. No. L4", "id_number": "CaltechAUTHORS:20170203-071518784", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170203-071518784", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Royal Society" }, { "agency": "Consejo Nacional de Ciencia y Tecnolog\u00eda (CONACYT)", "grant_number": "CB-2012-183007" }, { "agency": "NASA Hubble Fellowship", "grant_number": "HST-HF2-51355" }, { "agency": "Science and Technology Facilities Council (STFC)" }, { "agency": "NASA", "grant_number": "NAS5-26555" } ] }, "collection": "CaltechAUTHORS", "doi": "10.1051/0004-6361/201629769", "primary_object": { "basename": "aa29769-16.pdf", "url": "https://authors.library.caltech.edu/records/eemqj-cqf20/files/aa29769-16.pdf" }, "related_objects": [ { "basename": "1611.05866v1.pdf", "url": "https://authors.library.caltech.edu/records/eemqj-cqf20/files/1611.05866v1.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Wahhaj, Zahed; Milli, Julien; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rhsej-ghx34", "eprint_id": 67857, "eprint_status": "archive", "datestamp": "2023-08-22 19:06:25", "lastmod": "2023-10-18 21:49:13", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Laboratory demonstration of a dual-stage vortex coronagraph", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Coronagraphy; Starlight rejection; High contrast imaging", "note": "\u00a9 2016 Elsevier. \n\nReceived 22 February 2016, Revised 14 May 2016, Accepted 15 May 2016, Available online 1 June 2016. \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA, United States.", "abstract": "While an ideal optical vortex coronagraph operating behind a clear, circular, unaberrated telescope aperture can theoretically provide perfect rejection of the incident plane wave from an unresolved star, use of a telescope with an on-axis secondary mirror limits the rejection. In theory, a dual-stage vortex coronagraph can provide improved starlight rejection for an on-axis telescope, and here we provide experimental confirmation of the predicted distribution of the residual light in the output pupil plane of a dual-stage vortex coronagraph. In addition, a simple method of further improving the rejection of such a coronagraph is suggested: by slightly oversizing the first Lyot stop and phase-shifting the light within the exposed annulus by half a wave, the residual starlight within the pupil can be canceled to deeper levels.", "date": "2016-11-15", "date_type": "published", "publication": "Optics Communications", "volume": "379", "publisher": "Elsevier", "pagerange": "64-67", "id_number": "CaltechAUTHORS:20160610-155813167", "issn": "0030-4018", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160610-155813167", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1016/j.optcom.2016.05.042", "resource_type": "article", "pub_year": "2016", "author_list": "Serabyn, Eugene; Liewer, Kurt; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xe5j0-87h72", "eprint_id": 73144, "eprint_status": "archive", "datestamp": "2023-08-20 14:22:41", "lastmod": "2023-10-24 15:04:27", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vargas-Catal\u00e1n-E", "name": { "family": "Vargas Catal\u00e1n", "given": "E." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "B." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" } ] }, "title": "Optimizing the subwavelength grating of L-band annular groove phase masks for high coronagraphic performance", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution / planetary systems / planets and satellites: detection", "note": "\u00a9 ESO, 2016. \n\nReceived 19 April 2016 / Accepted 4 August 2016. \n\nThe authors are grateful to J\u00e9r\u00f4me Parisot (LESIA, Observatoire de Paris), who manages the YACADIRE test bench, for his availability and help during every AGPM test campaigns. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569), the French Community of Belgium through an ARC grant for Concerted Research Action, and the Swedish Research Council (VR) through project grant 621-2014-5959.\n\nPublished - aa28739-16.pdf
", "abstract": "Context. The annular groove phase mask (AGPM) is one possible implementation of the vector vortex coronagraph, where the helical phase ramp is produced by a concentric subwavelength grating. For several years, we have been manufacturing AGPMs by etching gratings into synthetic diamond substrates using inductively coupled plasma etching. \n\nAims. We aim to design, fabricate, optimize, and evaluate new L-band AGPMs that reach the highest possible coronagraphic performance, for applications in current and forthcoming infrared high-contrast imagers. \n\nMethods. Rigorous coupled wave analysis (RCWA) is used for designing the subwavelength grating of the phase mask. Coronagraphic performance evaluation is performed on a dedicated optical test bench. The experimental results of the performance evaluation are then used to accurately determine the actual profile of the fabricated gratings, based on RCWA modeling. \n\nResults. The AGPM coronagraphic performance is very sensitive to small errors in etch depth and grating profile. Most of the fabricated components therefore show moderate performance in terms of starlight rejection (a few 100:1 in the best cases). Here we present new processes for re-etching the fabricated components in order to optimize the parameters of the grating and hence significantly increase their coronagraphic performance. Starlight rejection up to 1000:1 is demonstrated in a broadband L filter on the coronagraphic test bench, which corresponds to a raw contrast of about 10-5 at two resolution elements from the star for a perfect input wave front on a circular, unobstructed aperture. \n\nConclusions. Thanks to their exquisite performance, our latest L-band AGPMs are good candidates for installation in state of the art and future high-contrast thermal infrared imagers, such as METIS for the E-ELT.", "date": "2016-11", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "595", "publisher": "EDP Sciences", "pagerange": "Art. No. A127", "id_number": "CaltechAUTHORS:20161222-104537389", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161222-104537389", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Swedish Research Council", "grant_number": "621-2014-5959" } ] }, "doi": "10.1051/0004-6361/201628739", "primary_object": { "basename": "aa28739-16.pdf", "url": "https://authors.library.caltech.edu/records/xe5j0-87h72/files/aa28739-16.pdf" }, "resource_type": "article", "pub_year": "2016", "author_list": "Vargas Catal\u00e1n, E.; Huby, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h499r-32a64", "eprint_id": 79155, "eprint_status": "archive", "datestamp": "2023-08-20 13:30:05", "lastmod": "2024-01-13 20:35:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" } ] }, "title": "Adaptive Optics in High-Contrast Imaging", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2016 Springer International Publishing Switzerland. \n\nFirst Online: 25 August 2016.", "abstract": "While most confirmed exoplanets were discovered by indirect techniques such as radial velocities or transits, adaptive optics (AO) assisted direct imaging is a very rich and complementary method that can reveal the orbital motion of the planet, the spectrophotometry of its atmosphere but also the architecture and properties of its circumstellar environment. It can unveil possible interactions with a disc, whether a proto-planetary disc in case of on-going planetary accretion, or a debris disc for more evolved, gas-poor systems. From a statistical point of view, it probes a region, in the mass versus semi-major axis discovery space, different from other techniques, as illustrated in Fig.\u20092.1. Reaching a uniform sampling of such a parameter space is essential to derive the frequency of planets as a function of mass and semi-major axis, and therefore constrain the planet formation mechanisms. For instance, theories of planet formation predict a higher efficiency of giant planet formation close to the snow line, where radial velocity and transit techniques are poorly sensitive. They require additional ingredients such as migrations and orbital instabilities to explain the current view depicted in Fig.\u20092.1.", "date": "2016-08-25", "date_type": "published", "publisher": "Springer", "place_of_pub": "Cham, Switzerland", "pagerange": "17-41", "id_number": "CaltechAUTHORS:20170718-110428004", "isbn": "978-3-319-39737-5", "book_title": "Astronomy at High Angular Resolution: A Compendium of Techniques in the Visible and Near-Infrared", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170718-110428004", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "Henri M. J." } }, { "id": "Hussain-G", "name": { "family": "Hussain", "given": "Gaitee" } }, { "id": "Berger-J-P", "name": { "family": "Berger", "given": "Jean-Philippe" } }, { "id": "Schmidtobreick-L", "name": { "family": "Schmidtobreick", "given": "Linda" } } ] }, "doi": "10.1007/978-3-319-39739-9_2", "resource_type": "book_section", "pub_year": "2016", "author_list": "Milli, Julien; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zzsab-9ra62", "eprint_id": 71991, "eprint_status": "archive", "datestamp": "2023-08-20 13:29:39", "lastmod": "2024-01-13 20:19:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The Habitable Exoplanet (HabEx) Imaging Mission: preliminary science drivers and technical requirements", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, biosignatures, high contrast imaging, galaxy formation and evolution, coronagraph, starshade", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPart of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 99040L.pdf
", "abstract": "HabEx is one of four candidate flagship missions being studied in detail by NASA, to be submitted for consideration to the 2020 Decadal Survey in Astronomy and Astrophysics for possible launch in the 2030s. It will be optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and will also enable a wide range of general astrophysics science. HabEx aims to fully characterize planetary systems around nearby solar-type stars for the first time, including rocky planets, possible water worlds, gas giants, ice giants, and faint circumstellar debris disks. In particular, it will explore our nearest neighbors and search for signs of habitability and biosignatures in the atmospheres of rocky planets in the habitable zones of their parent stars. Such high spatial resolution, high contrast observations require a large (roughly greater than 3.5m), stable, and diffraction-limited optical space telescope. Such a telescope also opens up unique capabilities for studying the formation and evolution of stars and galaxies. We present some preliminary science objectives identified for HabEx by our Science and Technology Definition Team (STDT), together with a first look at the key challenges and design trades ahead.", "date": "2016-08-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99040L", "id_number": "CaltechAUTHORS:20161114-114454825", "isbn": "978-1-5106-0187-1", "book_title": "Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161114-114454825", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } } ] }, "doi": "10.1117/12.2240457", "primary_object": { "basename": "99040L.pdf", "url": "https://authors.library.caltech.edu/records/zzsab-9ra62/files/99040L.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mennesson, Bertrand and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7qph0-aba22", "eprint_id": 68898, "eprint_status": "archive", "datestamp": "2023-08-22 18:31:11", "lastmod": "2024-02-02 21:06:47", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta L." }, "orcid": "0000-0002-6076-5967" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Kraus-A-L", "name": { "family": "Kraus", "given": "Adam L." }, "orcid": "0000-0001-9811-568X" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Nielsen-E-L", "name": { "family": "Nielsen", "given": "Eric L." }, "orcid": "0000-0001-6975-9056" }, { "id": "Blunt-S-C", "name": { "family": "Blunt", "given": "Sarah C." }, "orcid": "0000-0002-3199-2888" } ] }, "title": "Searching for Scatterers: High-Contrast Imaging of Young Stars Hosting Wide-Separation Planetary-Mass Companions", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: statistical; planetary systems; techniques: high angular resolution", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2016 February 13; revised 2016 May 30; accepted 2016 June 16; published 2016 August 11.\n\nThe data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. We acknowledge the efforts of the Keck Observatory staff. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - apj_827_2_100.pdf
Submitted - 1606.06744v1.pdf
", "abstract": "We have conducted an angular differential imaging survey with NIRC2 at Keck in search of close-in substellar companions to a sample of seven systems with confirmed planetary-mass companions (PMCs) on wide orbits (>50 au). These wide-separation PMCs pose significant challenges to all three possible formation mechanisms: core accretion plus scattering, disk instability, and turbulent fragmentation. We explore the possibility that these companions formed closer in and were scattered out to their present-day locations by searching for other massive bodies at smaller separations. The typical sensitivity for this survey is \u0394K ~ 12.5 at 1\". We identify eight candidate companions, whose masses would reach as low as one Jupiter mass if gravitationally bound. From our multi-epoch astrometry we determine that seven of these are conclusively background objects, while the eighth near DH Tau is ambiguous and requires additional monitoring. We rule out the presence of >7 M_(Jup) bodies in these systems down to 15\u201350 au that could be responsible for scattering. This result combined with the totality of evidence suggests that dynamical scattering is unlikely to have produced this population of PMCs. We detect orbital motion from the companions ROXs 42B b and ROXs 12 b, and from this determine 95% upper limits on the companions' eccentricities of 0.58 and 0.83 respectively. Finally, we find that the 95% upper limit on the occurrence rate of additional planets with masses between 5 and 15 M_(Jup) outside of 40 au in systems with PMCs is 54%.", "date": "2016-08-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "827", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 100", "id_number": "CaltechAUTHORS:20160707-154148781", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160707-154148781", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA" }, { "agency": "W. M. Keck Foundation" } ] }, "local_group": { "items": [ { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/0004-637X/827/2/100", "primary_object": { "basename": "1606.06744v1.pdf", "url": "https://authors.library.caltech.edu/records/7qph0-aba22/files/1606.06744v1.pdf" }, "related_objects": [ { "basename": "apj_827_2_100.pdf", "url": "https://authors.library.caltech.edu/records/7qph0-aba22/files/apj_827_2_100.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Bryan, Marta L.; Bowler, Brendan P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h3bw2-7ah21", "eprint_id": 72031, "eprint_status": "archive", "datestamp": "2023-08-20 13:26:43", "lastmod": "2024-01-13 20:20:06", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "Renyu" }, "orcid": "0000-0003-2215-8485" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "Bj\u00f6rn" }, "orcid": "0000-0001-5578-1498" } ] }, "title": "High-contrast imaging and high-resolution spectroscopy observation of exoplanets", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanet, coronagraph, high-contrast imaging, high-resolution spectrograph, atmospheric modeling", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 99112T.pdf
", "abstract": "Detection and characterization of exoplanets faces challenges of smaller angular separation and high contrast between exoplanets and their host stars. High contrast imaging (HCI) instruments equipped with coronagraphs are built to meet these challenges, providing a way of spatially suppressing and separating stellar flux from that of a planet. Another way of separating stellar flux can be achieved by high-resolution spectroscopy (HRS), exploiting the fact that spectral features are different between a star and a planet. Observing exoplanets with HCI+HRS will achieve a higher contrast than the spatial or the spectroscopic method alone, improving the sensitivity to planet detection and enabling the study of the physical and chemical processes. Here, we simulate the performance of a HCI+HRS instrument (i.e., the upgrade Keck NIRSPEC and the fiber injection unit) to study its potential in detecting and characterizing currently known directly imaged planets. The simulation considers the spectral information content of an exoplanet, telescope and instrument specifications and realistic noise sources. The result of the simulation helps to set system requirement and informs designs at system-level. We also perform a trade study for a HCI+HRS instrument for a space mission to study an Earth-like planet orbiting a Sun-like star at 10 pc.", "date": "2016-08-18", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99112T", "id_number": "CaltechAUTHORS:20161115-110140716", "isbn": "978-1-5106-0201-4", "book_title": "Modeling, Systems Engineering, and Project Management for Astronomy VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161115-110140716", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Angeli-G-Z", "name": { "family": "Angeli", "given": "George Z." } }, { "id": "Dierickx-P", "name": { "family": "Dierickx", "given": "Philippe" } } ] }, "doi": "10.1117/12.2235216", "primary_object": { "basename": "99112T.pdf", "url": "https://authors.library.caltech.edu/records/h3bw2-7ah21/files/99112T.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Wang, Ji; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/w3p4n-gec81", "eprint_id": 68897, "eprint_status": "archive", "datestamp": "2023-08-22 18:28:55", "lastmod": "2024-02-02 21:07:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Knutson-H-A", "name": { "family": "Knutson", "given": "Heather A." }, "orcid": "0000-0002-5375-4725" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Bryan-M-L", "name": { "family": "Bryan", "given": "Marta" }, "orcid": "0000-0002-6076-5967" }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" }, { "id": "Batygin-K", "name": { "family": "Batygin", "given": "Konstantin" }, "orcid": "0000-0002-7094-7908" }, { "id": "Crossfield-I-J-M", "name": { "family": "Crossfield", "given": "Ian" }, "orcid": "0000-0002-1835-1891" }, { "id": "Hansen-B-M-S", "name": { "family": "Hansen", "given": "Brad" }, "orcid": "0000-0001-7840-3502" }, { "id": "Howard-A-W", "name": { "family": "Howard", "given": "Andrew W." }, "orcid": "0000-0001-8638-0320" }, { "id": "Johnson-J-A", "name": { "family": "Johnson", "given": "John A." }, "orcid": "0000-0001-9808-7172" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Morton-T-D", "name": { "family": "Morton", "given": "Timothy D." }, "orcid": "0000-0002-8537-5711" }, { "id": "Muirhead-P-S", "name": { "family": "Muirhead", "given": "Philip S." }, "orcid": "0000-0002-0638-8822" }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "Ji" }, "orcid": "0000-0002-4361-8885" } ] }, "title": "Friends of Hot Jupiters. IV. Stellar companions beyond 50 AU might facilitate giant planet formation, but most are unlikely to cause Kozai-Lidov migration", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: close \u2013 binaries: eclipsing \u2013 methods: observational \u2013 planetary systems \u2013 planets and satellites: dynamical evolution and stability \u2013 techniques: high angular resolution", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2016 May 16; revised 2016 June 16; accepted 2016 June 17; published 2016 August 3. \n\nThis work was supported by NASA grant NNX14AD24G. H.N. is grateful for funding support from the Natural Sciences and Engineering Research Council of Canada and the NASA Earth and Space Science Fellowship Program grant NNX15AR12H. \n\nThis work was based on observations at the W. M. Keck Observatory granted by the California Institute of Technology. We thank the observers who contributed to the measurements reported here and acknowledge the efforts of the Keck Observatory staff. We extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. \n\nFacility: Keck:II (NIRC2) - KECK II Telescope.\n\nPublished - Ngo_2016_ApJ_827_8.pdf
Submitted - 1606.07102v1.pdf
", "abstract": "Stellar companions can influence the formation and evolution of planetary systems, but there are currently few observational constraints on the properties of planet-hosting binary star systems. We search for stellar companions around 77 transiting hot Jupiter systems to explore the statistical properties of this population of companions as compared to field stars of similar spectral type. After correcting for survey incompleteness, we find that 47% \u00b1 7% of hot Jupiter systems have stellar companions with semimajor axes between 50 and 2000 au. This is 2.9 times larger than the field star companion fraction in this separation range, with a significance of 4.4\u03c3. In the 1\u201350 au range, only 3.9^(+4.5)_(-2.0)% of hot Jupiters host stellar companions, compared to the field star value of 16.4% \u00b1 0.7%, which is a 2.7\u03c3 difference. We find that the distribution of mass ratios for stellar companions to hot Jupiter systems peaks at small values and therefore differs from that of field star binaries which tend to be uniformly distributed across all mass ratios. We conclude that either wide separation stellar binaries are more favorable sites for gas giant planet formation at all separations, or that the presence of stellar companions preferentially causes the inward migration of gas giant planets that formed farther out in the disk via dynamical processes such as Kozai\u2013Lidov oscillations. We determine that less than 20% of hot Jupiters have stellar companions capable of inducing Kozai\u2013Lidov oscillations assuming initial semimajor axes between 1 and 5 au, implying that the enhanced companion occurrence is likely correlated with environments where gas giants can form efficiently.", "date": "2016-08-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "827", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 8", "id_number": "CaltechAUTHORS:20160707-153537679", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160707-153537679", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX14AD24G" }, { "agency": "Natural Sciences and Engineering Research Council of Canada (NSERC)" }, { "agency": "NASA Earth and Space Science Fellowship", "grant_number": "NNX15AR12H" } ] }, "local_group": { "items": [ { "id": "Division-of-Geological-and-Planetary-Sciences" } ] }, "doi": "10.3847/0004-637X/827/1/8", "primary_object": { "basename": "1606.07102v1.pdf", "url": "https://authors.library.caltech.edu/records/w3p4n-gec81/files/1606.07102v1.pdf" }, "related_objects": [ { "basename": "Ngo_2016_ApJ_827_8.pdf", "url": "https://authors.library.caltech.edu/records/w3p4n-gec81/files/Ngo_2016_ApJ_827_8.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Ngo, Henry; Knutson, Heather A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8rkbz-w4t10", "eprint_id": 74399, "eprint_status": "archive", "datestamp": "2023-08-20 13:21:06", "lastmod": "2024-01-13 20:25:04", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Wildi-F", "name": { "family": "Wildi", "given": "Francois" } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "Jean Francois" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "Jean-Luc" } }, { "id": "Puget-P", "name": { "family": "Puget", "given": "Pascal" } }, { "id": "Le-Mignant-D", "name": { "family": "Le Mignant", "given": "David" } }, { "id": "Roelfsema-R", "name": { "family": "Roelfsema", "given": "Ronald" } }, { "id": "Pragt-J", "name": { "family": "Pragt", "given": "Johan" } }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "Hands Martin" } }, { "id": "Gratton-R-G", "name": { "family": "Gratton", "given": "Raffaele" } }, { "id": "Mesa-D", "name": { "family": "Mesa", "given": "Dino" } }, { "id": "Claudi-R", "name": { "family": "Claudi", "given": "Ricardo" } }, { "id": "Langlois-M", "name": { "family": "Langlois", "given": "Maud" } }, { "id": "Costille-A", "name": { "family": "Costille", "given": "Anne" } }, { "id": "Hugot-E", "name": { "family": "Hugot", "given": "Emmanuel" }, "orcid": "0000-0002-5879-6318" }, { "id": "O'Neil-J", "name": { "family": "O'Neil", "given": "Jared" } }, { "id": "Guerra-J-C", "name": { "family": "Guerra", "given": "Juan Carlos" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Zins-G", "name": { "family": "Zins", "given": "Gerard" } } ] }, "title": "SPHERE on-sky performance compared with budget predictions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme adaptive optics, High contrast imaging, System analysis, Wave front PSD budgeting", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nSPHERE is an instrument designed and built by a consortium consisting of IPAG, MPIA, LAM, LESIA, Laboratoire Fizeau, INAF, Observatoire de Gen\u00e8ve, ETH, NOVA, ONERA and ASTRON in collaboration with ESO. We are grateful to all the consortium members who contributed to build, test, and validate the instrument in Europe and in Chile. We also thank the ESO staff involved with the installation and operation of SPHERE on the VLT-UT3.\n\nPublished - 99083D.pdf
", "abstract": "The SPHERE (spectro-photometric exoplanet research) extreme-AO planet hunter saw first light at the VLT observatory on Mount Paranal in May 2014 after ten years of development. Great efforts were put into modelling its performance, particularly in terms of achievable contrast, and to budgeting instrumental features such as wave front errors and optical transmission to each of the instrument's three focal planes, the near infrared dual imaging camera IRDIS, the near infrared integral field spectrograph IFS and the visible polarimetric camera ZIMPOL. In this paper we aim at comparing predicted performance with measured performance. In addition to comparing on-sky contrast curves and calibrated transmission measurements, we also compare the PSD-based wave front error budget with in-situ wave front maps obtained thanks to a Zernike phase mask, ZELDA, implemented in the infrared coronagraph wheel. One of the most critical elements of the SPHERE system is its high-order deformable mirror, a prototype 40x40 actuator piezo stack design developed in parallel with the instrument itself. The development was a success, as witnessed by the instrument performance, in spite of some bad surprises discovered on the way. The devastating effects of operating without taking properly into account the loss of several actuators and the thermally and temporally induced variations in the DM shape will be analysed, and the actions taken to mitigate these defects through the introduction of specially designed Lyot stops and activation of one of the mirrors in the optical train will be described.", "date": "2016-08-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99083D", "id_number": "CaltechAUTHORS:20170217-082008486", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-082008486", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233953", "primary_object": { "basename": "99083D.pdf", "url": "https://authors.library.caltech.edu/records/8rkbz-w4t10/files/99083D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Dohlen, Kjetil; Vigan, Arthur; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/se4pf-12t28", "eprint_id": 74403, "eprint_status": "archive", "datestamp": "2023-08-20 13:17:17", "lastmod": "2024-01-13 20:25:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Adkins-S-M", "name": { "family": "Adkins", "given": "Sean M." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Larkin-J-E", "name": { "family": "Larkin", "given": "James E." }, "orcid": "0000-0001-7687-3965" }, { "id": "Lewis-H-A", "name": { "family": "Lewis", "given": "Hilton A." } }, { "id": "Martin-D-Christopher", "name": { "family": "Martin", "given": "Christopher" }, "orcid": "0000-0002-8650-1644" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Prochaska-J-X", "name": { "family": "Prochaska", "given": "J. X." }, "orcid": "0000-0002-7738-6875" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" } ] }, "title": "New developments in instrumentation at the W. M. Keck Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Infrared, Instrumentation, Integral Field, Laser Guide Star, Spectrograph, Targets of Opportunity, Telescope Control", "note": "\u00a9 2016 SPIE. \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. \n\nThe development of the Keck II next generation laser is made possible through the support of the Gordon and Betty Moore Foundation, the W. M. Keck Foundation, the Bob & Renee Parsons Foundation, Friends of Keck Observatory, and the Thirty Meter Telescope Project. \n\nThe development of the blue channel of KCWI is supported in part by a grant from National Science Foundation under Scientific Program Order No. 5 as issued for support of the Telescope Systems Instrumentation Program (TSIP), in accordance with Proposal No. AST-0335461 submitted by AURA. Support for KCWI has also come from the Heising-Simons Foundation and the Mount Cuba Foundation. \n\nObservatory operations are supported in part by the National Aeronautics and Space Administration under Grant and Cooperative Agreement No. NNX13AH26A. The OSIRIS spectrograph upgrade is supported by the National Science Foundation under Grant No. AST-1311102, K1DM3 is supported in part by the National Science Foundation under Grant No. AST-1337609, the red channel of KCWI is supported in part by the National Science Foundation under Grant No. AST-1429890. The NIRSPEC upgrade is supported in part by the National Science Foundation under Grant No. AST-1532315, and by the Heising-Simons Foundation. The OSIRIS grating upgrade project was funded in part by the Dunlap Institute, University of Toronto. The OSIRIS imager upgrade project is supported by funding from the Gordon and Betty Moore Foundation. Development of KPF is supported by the Heising-Simons Foundation.\n\nPublished - 990805.pdf
", "abstract": "The W. M. Keck Observatory is committed to maintaining the scientific leadership of our observing community by matching our observers' skills and passions in their fields of astronomical science with a continuing dedication by the Observatory and its collaborators to the development of state of the art instrumentation and systems. Our science driven strategic plan guides these developments and informs our plans for the future. In this paper we describe the performance of recently completed new instruments, instrument upgrades, and infrastructure upgrade projects. We also describe the expected performance of projects currently in the development or construction phases. Projects recently completed include a new laser for the Keck II AO system, the upgrade of the spectrograph detector in the OSIRIS instrument, and the upgrade to the telescope control system on the Keck II telescope. Projects in development include an upgrade to the telescope control system on the Keck I telescope, the blue channel of the Keck Cosmic Web Imager, the red channel of the Keck Cosmic Web Imager, the Keck Planet Finder, a deployable tertiary mirror for the Keck I telescope, an upgrade to the imager of OSIRIS, a major upgrade to the NIRSPEC instrument, and a fiber feed from the Keck II AO system to NIRSPEC.", "date": "2016-08-03", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990805", "id_number": "CaltechAUTHORS:20170217-125257372", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-125257372", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Bob and Renee Parsons Foundation" }, { "agency": "Friends of Keck Observatory" }, { "agency": "Thirty Meter Telescope Project" }, { "agency": "NSF", "grant_number": "AST-0335461" }, { "agency": "Heising-Simons Foundation" }, { "agency": "Mt. Cuba Foundation" }, { "agency": "NASA", "grant_number": "NNX13AH26A" }, { "agency": "NSF", "grant_number": "AST-1311102" }, { "agency": "NSF", "grant_number": "AST-1337609" }, { "agency": "NSF", "grant_number": "AST-1429890" }, { "agency": "NSF", "grant_number": "AST-1532315" }, { "agency": "University of Toronto" } ] }, "local_group": { "items": [ { "id": "Thirty-Meter-Telescope" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233759", "primary_object": { "basename": "990805.pdf", "url": "https://authors.library.caltech.edu/records/se4pf-12t28/files/990805.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Adkins, Sean M.; McLean, Ian S.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/shc1h-8jb65", "eprint_id": 87167, "eprint_status": "archive", "datestamp": "2023-08-20 13:17:26", "lastmod": "2024-01-14 20:15:12", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans Ulrich" } }, { "id": "Tristram-K-R-W", "name": { "family": "Tristram", "given": "Konrad" } }, { "id": "Asmus-D", "name": { "family": "Asmus", "given": "Daniel" }, "orcid": "0000-0003-0220-2063" }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Di-Lieto-N", "name": { "family": "Di Lieto", "given": "Nicola" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Duhoux-P", "name": { "family": "Duhoux", "given": "Philippe" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Hummel-Christian", "name": { "family": "Hummel", "given": "Christian" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Jakob-G", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Sanchez-Joel", "name": { "family": "Sanchez", "given": "Joel" } }, { "id": "Sandrock-S", "name": { "family": "Sandrock", "given": "Stefan" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Stegmaier-J\u00f6rg", "name": { "family": "Stegmaier", "given": "J\u00f6rg" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Acker-M", "name": { "family": "van den Acker", "given": "Mario" } }, { "id": "Valdes-G", "name": { "family": "Valdes", "given": "Guillermo" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } } ] }, "title": "VISIR Upgrade: all's well that ends well", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, upgrade, ESO VLT, mid-IR, AQUARIUS, excess low frequency noise, chopping, water vapour, lessons learned", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWe gratefully acknowledge the support by Paranal staff and the good collaboration. In particular we thank M. Tapia and the staff of the machine shop for their quick and effective support. Great support was already provided by system engineering and science operations. Special thanks go to Prof. Peter Tuthill (The University of Sydney, Australia) for designing the sparse aperture mask.\n\nPublished - 99080D.pdf
", "abstract": "We present an overview of the VISIR instrument after its upgrade and return to science operations. VISIR is the midinfrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan was based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As AQUARIUS detector array manufactured by Raytheon. In addition, a new prism spectroscopic mode covers the whole N-band in a single observation. Finally, new scientific capabilities for high resolution and high-contrast imaging are offered by sub-aperture mask and coronagraphic modes. In order to make optimal use of favourable atmospheric conditions, a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a user-defined constraint on water vapour. During the commissioning in 2012, it was found that the on-sky sensitivity of the AQUARIUS detector was significantly below expectations. Extensive testing of the detector arrays in the laboratory and on-sky enabled us to diagnose the cause for the shortcoming of the detector as excess low frequency noise. It is inherent to the design chosen for this detector and cannot be remedied by changing the detector set-up. Since this is a form of correlated noise, its impact can be limited by modulating the scene recorded by the detector. After careful analysis, we have implemented fast (up to 4 Hz) chopping with field stabilization using the secondary mirror of the VLT. During commissioning, the upgraded VISIR has been confirmed to be more sensitive than the old instrument, and in particular for low-resolution spectroscopy in the N-band, a gain of a factor 6 is realized in observing efficiency. After overcoming several additional technical problems, VISIR is back in Science Operations since April 2015. In addition an upgrade of the IT infrastructure related to VISIR has been conducted in order to support burst-mode operations. Science Verification of the new modes was performed in Feb 2016. The upgraded VISIR is a powerful instrument providing close to background limited performance for diffraction-limited observations at an 8-m telescope. It offers synergies with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey works like WISE. In addition, it will bring confirmation of the technical readiness and scientific value of several aspects for future mid-IR instrumentation at Extremely Large Telescopes. We also present several lessons learned during the project.", "date": "2016-08-03", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99080D", "id_number": "CaltechAUTHORS:20180615-153348012", "isbn": "9781510601956", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-153348012", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2232441", "primary_object": { "basename": "99080D.pdf", "url": "https://authors.library.caltech.edu/records/shc1h-8jb65/files/99080D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Kerber, Florian; K\u00e4ufl, Hans Ulrich; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gw9vy-7pa34", "eprint_id": 72034, "eprint_status": "archive", "datestamp": "2023-08-20 13:01:58", "lastmod": "2024-01-13 20:20:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Norman-C", "name": { "family": "Norman", "given": "Colin" } } ] }, "title": "Correcting for the effects of pupil discontinuities with the ACAD method", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, WFIRST-AFTA, High-contrast imaging, adaptive optics, wave-front error correction, segmentation, aperture discontinuities, deformable mirror", "note": "\u00a9 2016 SPIE. \n\nThis material is based upon work carried out under subcontract #1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology. We would like to thanks J. Krist (JPL) for his helpful comments on the throughput and contrast definition.\n\nPublished - 99044T.pdf
", "abstract": "The current generation of ground-based coronagraphic instruments uses deformable mirrors to correct for phase errors and to improve contrast levels at small angular separations. Improving these techniques, several space and ground based instruments are currently developed using two deformable mirrors to correct for both phase and amplitude errors. However, as wavefront control techniques improve, more complex telescope pupil geometries (support structures, segmentation) will soon be a limiting factor for these next generation coronagraphic instruments. The technique presented in this proceeding, the Active Correction of Aperture Discontinuities method, is taking advantage of the fact that most future coronagraphic instruments will include two deformable mirrors, and is proposing to find the shapes and actuator movements to correct for the effect introduced by these complex pupil geometries. For any coronagraph previously designed for continuous apertures, this technique allow to obtain similar performance in contrast with a complex aperture (with segmented and secondary mirror support structures), with high throughput and flexibility to adapt to changing pupil geometry (e.g. in case of segment failure or maintenance of the segments). We here present the results of the parametric analysis realized on the WFIRST pupil for which we obtained high contrast levels with several deformable mirror setups (size, separation between them), coronagraphs (Vortex charge 2, vortex charge 4, APLC) and spectral bandwidths. However, because contrast levels and separation are not the only metrics to maximize the scientific return of an instrument, we also included in this study the influence of these deformable mirror shapes on the throughput of the instrument and sensitivity to pointing jitters. Finally, we present results obtained on another potential space based telescope segmented aperture. The main result of this proceeding is that we now obtain comparable performance than the coronagraphs previously designed for WFIRST. First result from the parametric analysis strongly suggest that the 2 deformable mirror set up (size and distance between them) have a important impact on the performance in contrast and throughput of the final instrument.", "date": "2016-07-29", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99044T", "id_number": "CaltechAUTHORS:20161115-122345576", "isbn": "978-1-5106-0187-1", "book_title": "Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161115-122345576", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "Lystrup-M", "name": { "family": "Lystrup", "given": "Makenzie" } } ] }, "doi": "10.1117/12.2232907", "primary_object": { "basename": "99044T.pdf", "url": "https://authors.library.caltech.edu/records/gw9vy-7pa34/files/99044T.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mazoyer, Johan; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1ade7-pqs94", "eprint_id": 72546, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:19", "lastmod": "2024-01-13 20:21:38", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "Matthew" }, "orcid": "0000-0002-7064-8270" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "Christoph U." } }, { "id": "Otten-G", "name": { "family": "Otten", "given": "Gilles" } }, { "id": "Feldt-M", "name": { "family": "Feldt", "given": "Markus" } }, { "id": "Hippler-S", "name": { "family": "Hippler", "given": "Stefan" } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } }, { "id": "Brandl-B-R", "name": { "family": "Brandl", "given": "Bernhard R." } } ] }, "title": "End-to-end simulations of the E-ELT/METIS coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets detection, Mid-IR, Vector Vortex Coronagraphs, Apodizing Phase Plate coronagraphs, E-ELT/METIS instrument, end-to-end simulations", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 990973.pdf
", "abstract": "The direct detection of low-mass planets in the habitable zone of nearby stars is an important science case for future E-ELT instruments such as the mid-infrared imager and spectrograph METIS, which features vortex phase masks and apodizing phase plates (APP) in its baseline design. In this work, we present end-to-end performance simulations, using Fourier propagation, of several METIS coronagraphic modes, including focal-plane vortex phase masks and pupil-plane apodizing phase plates, for the centrally obscured, segmented E-ELT pupil. The atmosphere and the AO contributions are taken into account. Hybrid coronagraphs combining the advantages of vortex phase masks and APPs are considered to improve the METIS coronagraphic performance.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990973", "id_number": "CaltechAUTHORS:20161205-092810966", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-092810966", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233444", "primary_object": { "basename": "990973.pdf", "url": "https://authors.library.caltech.edu/records/1ade7-pqs94/files/990973.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Carlomagno, Brunella; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yta9h-qj084", "eprint_id": 72537, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:04", "lastmod": "2024-01-13 20:21:22", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Banas-T", "name": { "family": "Banas", "given": "T." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A. M." } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "J.-F." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } } ] }, "title": "Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images", "ispublished": "unpub", "full_text_status": "public", "keywords": "Extreme Adaptive Optics, Speckles, High Contrast", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nJ.M. acknowledges support from the ESO fellowship program and we thank ESO staff and technical operators at the Paranal Observatory. T.B. acknowledges the Adaptive Optics groups at ESO Santiago and ESO Garching for support of this research.\n\nPublished - 99094Z.pdf
Submitted - 1608.02149v2.pdf
", "abstract": "The major source of noise in high-contrast imaging is the presence of slowly evolving speckles that do not average with time. The temporal stability of the point-spread-function (PSF) is therefore critical to reach a high contrast with extreme adaptive optics (XAO) instruments. Understanding on which timescales the PSF evolves and what are the critical parameters driving the speckle variability allow to design an optimal observing strategy and data reduction technique to calibrate instrumental aberrations and reveal faint astrophysical sources. We have obtained a series of 52 min, AO-corrected, coronagraphically occulted, high-cadence (1.6Hz), H-band images of the star HR 3484 with the SPHERE (Spectro-Polarimeter High-contrast Exoplanet REsearch1) instrument on the VLT. This is a unique data set from an XAO instrument to study its stability on timescales as short as one second and as long as several tens of minutes. We find different temporal regimes of decorrelation. We show that residuals from the atmospheric turbulence induce a fast, partial decorrelation of the PSF over a few seconds, before a transition to a regime with a linear decorrelation with time, at a rate of several tens parts per million per second (ppm/s). We analyze the spatial dependence of this decorrelation within the well-corrected radius of the adaptive optics system and show that the linear decorrelation is faster at short separations. Last, we investigate the influence of the distance to the meridian on the decorrelation.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99094Z", "id_number": "CaltechAUTHORS:20161202-145424511", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161202-145424511", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2231703", "primary_object": { "basename": "1608.02149v2.pdf", "url": "https://authors.library.caltech.edu/records/yta9h-qj084/files/1608.02149v2.pdf" }, "related_objects": [ { "basename": "99094Z.pdf", "url": "https://authors.library.caltech.edu/records/yta9h-qj084/files/99094Z.pdf" } ], "resource_type": "book_section", "pub_year": "2016", "author_list": "Milli, J.; Banas, T.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/a9n7p-13t03", "eprint_id": 87168, "eprint_status": "archive", "datestamp": "2023-08-20 13:00:56", "lastmod": "2024-01-14 20:15:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Femenia-B", "name": { "family": "Femenia", "given": "Bruno" } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Milburn-J-W", "name": { "family": "Milburn", "given": "Jennifer" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Speckle nulling wavefront control for Palomar and Keck", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, adaptive optics, wavefront correction", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990955.pdf
", "abstract": "We present a speckle nulling code currently being used for high contrast imaging at the Palomar and Keck telescopes. The code can operate in open and closed loop and is self-calibrating, requiring no system model and minimal hand-coded parameters. Written in a modular fashion, it is straightforward to port to different instruments. It has been used with systems operating in the optical through thermal infrared, and can deliver nearly an order of magnitude improvement in raw contrast. We will be releasing this code to the public in the near future.", "date": "2016-07-27", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990955", "id_number": "CaltechAUTHORS:20180615-154328287", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-154328287", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233025", "primary_object": { "basename": "990955.pdf", "url": "https://authors.library.caltech.edu/records/a9n7p-13t03/files/990955.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Bottom, Michael; Femenia, Bruno; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5nncp-jxs06", "eprint_id": 72545, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:35", "lastmod": "2024-01-13 20:21:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Femen\u00eda-Castell\u00e1-B", "name": { "family": "Femen\u00eda-Castell\u00e1", "given": "Bruno" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" } ] }, "title": "Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "W.M. Keck Observatory, NIRC2, high-contrast imaging, coronagraph, vortex phase mask", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 990922.pdf
", "abstract": "On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7\u03bcm. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990922", "id_number": "CaltechAUTHORS:20161205-080725840", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080725840", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233228", "primary_object": { "basename": "990922.pdf", "url": "https://authors.library.caltech.edu/records/5nncp-jxs06/files/990922.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Femen\u00eda-Castell\u00e1, Bruno; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5b36g-2m517", "eprint_id": 86796, "eprint_status": "archive", "datestamp": "2023-08-20 12:59:05", "lastmod": "2024-01-14 20:14:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "P." }, "orcid": "0000-0002-1646-442X" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "R." } }, { "id": "Chun-Miyoung", "name": { "family": "Chun", "given": "M." } }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "D." } }, { "id": "Cetre-S", "name": { "family": "Cetre", "given": "S." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "B." }, "orcid": "0000-0003-2649-2288" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "M." }, "orcid": "0000-0003-2232-7664" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "R." } }, { "id": "Wang-Ji", "name": { "family": "Wang", "given": "J." }, "orcid": "0000-0002-4361-8885" }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "G." }, "orcid": "0000-0002-1871-6264" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "M." }, "orcid": "0000-0002-0176-8973" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "A." }, "orcid": "0000-0001-6098-3924" }, { "id": "Ireland-M-J", "name": { "family": "Ireland", "given": "M." }, "orcid": "0000-0002-6194-043X" }, { "id": "Fucik-J-R", "name": { "family": "Fucik", "given": "J." } }, { "id": "Fortney-J-J", "name": { "family": "Fortney", "given": "J." }, "orcid": "0000-0002-9843-4354" }, { "id": "Crossfield-I-J-M", "name": { "family": "Crossfield", "given": "I." }, "orcid": "0000-0002-1835-1891" }, { "id": "Hu-Renyu", "name": { "family": "Hu", "given": "R." }, "orcid": "0000-0003-2215-8485" }, { "id": "Benneke-B", "name": { "family": "Benneke", "given": "B." }, "orcid": "0000-0001-5578-1498" } ] }, "title": "Keck Planet Imager and Characterizer: concept and phased implementation", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, high contrast high resolution spectroscopy, small inner working\nangle coronagraphy, vortex coronagraph, on-axis segmented telescopes, apodization, Extremely Large Telescopes", "note": "\u00a9 2016 SPIE. \n\nThis work was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 99090D.pdf
", "abstract": "The Keck Planet Imager and Characterizer (KPIC) is a cost-effective upgrade path to the W.M. Keck observatory (WMKO) adaptive optics (AO) system, building on the lessons learned from first and second-generation extreme AO (ExAO) coronagraphs. KPIC will explore new scientific niches in exoplanet science, while maturing critical technologies and systems for future ground-based (TMT, EELT, GMT) and space-based planet imagers (HabEx, LUVOIR). The advent of fast low-noise IR cameras (IR-APD, MKIDS, electron injectors), the rapid maturing of efficient wavefront sensing (WFS) techniques (Pyramid, Zernike), small inner working angle (IWA) coronagraphs (e.g., vortex) and associated low-order wavefront sensors (LOWFS), as well as recent breakthroughs in high contrast high resolution spectroscopy, open new direct exoplanet exploration avenues that are complementary to planet imagers such as VLT-SPHERE and the Gemini Planet Imager (GPI). For instance, the search and detailed characterization of planetary systems on solar-system scales around late-type stars, mostly beyond SPHERE and GPI's reaches, can be initiated now at WMKO.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99090D", "id_number": "CaltechAUTHORS:20180605-131826047", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180605-131826047", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233658", "primary_object": { "basename": "99090D.pdf", "url": "https://authors.library.caltech.edu/records/5b36g-2m517/files/99090D.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Mawet, D.; Wizinowich, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g44e2-ae444", "eprint_id": 72543, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:26", "lastmod": "2024-01-13 20:21:32", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "Chun-Mark-R", "name": { "family": "Chun", "given": "Mark" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Agapito-G", "name": { "family": "Agapito", "given": "Guido" } }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Hall-D-N-B", "name": { "family": "Hall", "given": "Donald" } }, { "id": "Plantet-C", "name": { "family": "Plantet", "given": "Cedric" } }, { "id": "Rigaut-F-J", "name": { "family": "Rigaut", "given": "Fran\u00e7ois" } } ] }, "title": "Near-Infrared Wavefront Sensing", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optics, wavefront sensing, tip-tilt sensing, near infrared, pyramid, Keck, LIFT", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The Keck I near-IR tip-tilt sensor was supported by the National Science Foundation under Grant No. AST-1007058 and by the Gordon and Betty Moore Foundation under Grant No. 4046. \n\nThe authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.\n\nPublished - 990915.pdf
", "abstract": "We discuss the advantages of wavefront sensing at near-infrared (IR) wavelengths with low-noise detector technologies that have recently become available. In this paper, we consider low order sensing with laser guide star (LGS) adaptive optics (AO) and high order sensing with natural guide star (NGS) AO. We then turn to the application of near-IR sensing with the W. M. Keck Observatory (WMKO) AO systems for science and as a demonstrator for similar systems on extremely large telescopes (ELTs). These demonstrations are based upon an LGS AO near-IR tip-tilt-focus sensor and our collaboration to implement a near-IR pyramid wavefront sensor (PWFS) for a NGS AO L-band coronagraphic imaging survey to identify exoplanet candidates.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990915", "id_number": "CaltechAUTHORS:20161205-080523798", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080523798", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "W. M. Keck Foundation" }, { "agency": "NSF", "grant_number": "AST-1007058" }, { "agency": "Gordon and Betty Moore Foundation", "grant_number": "4046" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233035", "primary_object": { "basename": "990915.pdf", "url": "https://authors.library.caltech.edu/records/g44e2-ae444/files/990915.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Wizinowich, Peter; Chun, Mark; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qjm8c-q3050", "eprint_id": 87169, "eprint_status": "archive", "datestamp": "2023-08-20 12:59:09", "lastmod": "2024-01-14 20:15:18", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "Jean Fran\u00e7ois" } }, { "id": "Fusco-T", "name": { "family": "Fusco", "given": "Thierry" } }, { "id": "Lamb-Masen", "name": { "family": "Lamb", "given": "Masen" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Brinkmann-M", "name": { "family": "Brinkmann", "given": "Martin" } }, { "id": "Guesalaga-A", "name": { "family": "Guesalaga", "given": "Andres" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter" }, "orcid": "0000-0002-1646-442X" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "Jean-Luc" } }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Le-Louarn-M", "name": { "family": "Le Louarn", "given": "Miska" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Neichel-B", "name": { "family": "Neichel", "given": "Beno\u00eet" } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Tackling down the low wind effect on SPHERE instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, adaptive optics, dome seeing", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990916.pdf
", "abstract": "SPHERE is the VLT second generation planet hunter instrument. Installed since May 2014 on UT3, the system has been commissioned and verified for more than one year now and routinely delivers unprecedented images of star surroundings, exoplanets and dust disks. The exceptional performance required for this kind of observation makes the appointment: a repeatable Strehl Ratio of 90% in H band, a rough contrast level of 10-5@0.5 arcsec, and reaches 10-6 at the same separation after differential imaging (SDI, ADI). The instrument also presents high contrast levels in the visible and an unprecedented 17mas diffraction-limited resolution at 0.65 microns wavelength. SAXO is the SPHERE XAO system, allowing the system to reach its final detectivity. Its high performance and therefore highly sensitive capacities turns a new eye on telescope environment. Even if XAO performance are reached as expected, some unexpected limitations are here described and a first work around is proposed and discussed. Spatial limitation: wave-front aberrations have been identified, deviating from kolmogorov statistics, and therefore not easily seen and compensated for by the XAO system. The impact of this limitations results in a degraded performance in some particular low wind conditions. Solutions are developed and tested on sky to propose a new operation procedure reducing this limitation. Temporal limitation: high amplitude vibrations on the low order modes have been issued, due to telescope environment and XAO behaviour. Again, a solution is developed and an assessment of its performance is dressed. The potential application of these solutions to E-ELT is proposed.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990916", "id_number": "CaltechAUTHORS:20180615-154904987", "isbn": "9781510601970", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-154904987", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2232459", "primary_object": { "basename": "990916.pdf", "url": "https://authors.library.caltech.edu/records/qjm8c-q3050/files/990916.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Sauvage, Jean Fran\u00e7ois; Fusco, Thierry; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gdsr5-nh307", "eprint_id": 72544, "eprint_status": "archive", "datestamp": "2023-08-20 12:58:30", "lastmod": "2024-01-13 20:21:34", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Femen\u00eca-C", "name": { "family": "Femen\u00eca", "given": "Castell\u00e0" } }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The QACITS pointing sensor: from theory to on-sky operation on Keck/NIRC2", "ispublished": "unpub", "full_text_status": "public", "keywords": "Wavefront sensing, vector vortex coronagraph, tip-tilt sensor, pointing sensor", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 990920.pdf
", "abstract": "Small inner working angle coronagraphs are essential to benefit from the full potential of large and future extremely large ground-based telescopes, especially in the context of the detection and characterization of exoplanets. Among existing solutions, the vortex coronagraph stands as one of the most effective and promising solutions. However, for focal-plane coronagraph, a small inner working angle comes necessarily at the cost of a high sensitivity to pointing errors. This is the reason why a pointing control system is imperative to stabilize the star on the vortex center against pointing drifts due to mechanical flexures, that generally occur during observation due for instance to temperature and/or gravity variations. We have therefore developed a technique called QACITS1 (Quadrant Analysis of Coronagraphic Images for Tip-tilt Sensing), which is based on the analysis of the coronagraphic image shape to infer the amount of pointing error. It has been shown that the flux gradient in the image is directly related to the amount of tip-tilt affecting the beam. The main advantage of this technique is that it does not require any additional setup and can thus be easily implemented on all current facilities equipped with a vortex phase mask. In this paper, we focus on the implementation of the QACITS sensor at Keck/NIRC2, where an L-band AGPM has been recently commissioned (June and October 2015), successfully validating the QACITS estimator in the case of a centrally obstructed pupil. The algorithm has been designed to be easily handled by any user observing in vortex mode, which is available for science in shared risk mode since 2016B.", "date": "2016-07-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 990920", "id_number": "CaltechAUTHORS:20161205-080638386", "isbn": "978-1-5106-0198-7", "book_title": "Adaptive Optics Systems V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161205-080638386", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2233274", "primary_object": { "basename": "990920.pdf", "url": "https://authors.library.caltech.edu/records/gdsr5-nh307/files/990920.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Huby, Elsa; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/e86vs-yyn43", "eprint_id": 72673, "eprint_status": "archive", "datestamp": "2023-08-20 12:57:01", "lastmod": "2024-01-13 20:22:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth" }, "orcid": "0000-0003-4769-1665" }, { "id": "Jewell-Jeffrey-B", "name": { "family": "Jewell", "given": "Jeffrey" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "Apodized vortex coronagraph designs for segmented aperture telescopes", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2016 SPIE. Society of Photo-Optical Instrumentation Engineers. \n\nThe authors thank Brunella Carlomagno and Olivier Absil from the University of Li\u00e8ge (ULg), Alexis Carlotti from Institute of Planetology and Astrophysics of Grenoble (IPAG), and Christian Delacroix from Cornell University for many fruitful discussions regarding coronagraph performance and optimization. This work was supported by the Exoplanet Exploration Program (ExEP), Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration (NASA).\n\nPublished - 99122L.pdf
", "abstract": "Current state-of-the-art high contrast imaging instruments take advantage of a number of elegant coronagraph designs to suppress starlight and image nearby faint objects, such as exoplanets and circumstellar disks. The ideal performance and complexity of the optical systems depends strongly on the shape of the telescope aperture. Unfortunately, large primary mirrors tend to be segmented and have various obstructions, which limit the performance of most conventional coronagraph designs. We present a new family of vortex coronagraphs with numerically-optimized gray-scale apodizers that provide the sensitivity needed to directly image faint exoplanets with large, segmented aperture telescopes, including the Thirty Meter Telescope (TMT) as well as potential next-generation space telescopes.", "date": "2016-07-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99122L", "id_number": "CaltechAUTHORS:20161208-143555472", "isbn": "978-1-5106-0203-8", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161208-143555472", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Burge-J-H", "name": { "family": "Burge", "given": "James H." } } ] }, "doi": "10.1117/12.2231715", "primary_object": { "basename": "99122L.pdf", "url": "https://authors.library.caltech.edu/records/e86vs-yyn43/files/99122L.pdf" }, "resource_type": "book_section", "pub_year": "2016", "author_list": "Ruane, Garreth; Jewell, Jeffrey; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zqj24-gnh02", "eprint_id": 68899, "eprint_status": "archive", "datestamp": "2023-08-20 12:53:18", "lastmod": "2023-10-20 16:18:36", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rappaport-S-A", "name": { "family": "Rappaport", "given": "S." } }, { "id": "Lehmann-H", "name": { "family": "Lehmann", "given": "H." } }, { "id": "Kalomeni-B", "name": { "family": "Kalomeni", "given": "B." } }, { "id": "Borkovits-T", "name": { "family": "Borkovits", "given": "T." }, "orcid": "0000-0002-8806-496X" }, { "id": "Latham-D-W", "name": { "family": "Latham", "given": "D." }, "orcid": "0000-0001-9911-7388" }, { "id": "Bieryla-A", "name": { "family": "Bieryla", "given": "A." }, "orcid": "0000-0001-6637-5401" }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "H." }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Howell-S-B", "name": { "family": "Howell", "given": "S." }, "orcid": "0000-0002-2532-2853" }, { "id": "Horch-E", "name": { "family": "Horch", "given": "E." } }, { "id": "Jacobs-T-L", "name": { "family": "Jacobs", "given": "T. L." } }, { "id": "LaCourse-D", "name": { "family": "LaCourse", "given": "D." } }, { "id": "S\u00f3dor-\u00c1", "name": { "family": "S\u00f3dor", "given": "\u00c1." } }, { "id": "Vanderburg-A", "name": { "family": "Vanderburg", "given": "A." }, "orcid": "0000-0001-7246-5438" }, { "id": "Pavlovski-K", "name": { "family": "Pavlovski", "given": "K." } } ] }, "title": "A Quintuple Star System Containing Two Eclipsing Binaries", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries : close binaries: eclipsing binaries: general binaries: spectroscopic binaries: visual", "note": "\u00a9 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. \n\nAccepted 2016 July 15. Received 2016 July 14. In original form 2016 May 20. First published online July 19, 2016. \n\nWe are grateful to Mark Everett for help with the WIYN observations. We thank Alan Levine for helpful discussions about this system. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts. Based, in part, on data from CMC15 Data Access Service at CAB (INTA-CSIC). This work was based on observations at the W. M. Keck Observatory granted by the California Institute of Technology. We thank the observers who contributed to the measurements reported here and acknowledge the efforts of the Keck Observatory staff. We extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. AV is supported by the NSF Graduate Research Fellowship, Grant No. DGE 1144152. EH is grateful for support from NASA's Ames Research Center that allowed him to participate in the speckle observations and analysis. BK gratefully acknowledges the support provided by the Turkish Scientific and Technical Research Council (T\u00dcB\u0130TAK-112T766 and T\u00dcB\u0130TAK-B\u0130DEP 2219). KP was supported by the Croatian HRZZ grant 2014-09-8656. \u00c1S acknowledges the financial support of the Hungarian NKFIH Grant K-115709 and the J\u00e1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences. TB and \u00c1S acknowledge the financial support of the NKFIH Grant OTKA K-113117. The Konkoly observations were supported by the Lend\u00fclet grant LP2012-31 of the Hungarian Academy of Sciences.\n\nPublished - MNRAS-2016-Rappaport-1812-25.pdf
Submitted - 1606.06324v1__1_.pdf
", "abstract": "We present a quintuple star system that contains two eclipsing binaries. The unusual architecture includes two stellar images separated by 11 arcsec on the sky: EPIC 212651213 and EPIC 212651234. The more easterly image (212651213) actually hosts both eclipsing binaries which are resolved within that image at 0.09 arcsec, while the westerly image (212651234) appears to be single in adaptive optics (AO), speckle imaging, and radial velocity (RV) studies. The 'A' binary is circular with a 5.1-d period, while the 'B' binary is eccentric with a 13.1-d period. The \u03b3 velocities of the A and B binaries are different by \u223c10\u2009km\u2009s^(\u22121). That, coupled with their resolved projected separation of 0.09 arcsec, indicates that the orbital period and separation of the 'C' binary (consisting of A orbiting B) are \u224365 yr and \u224325 au, respectively, under the simplifying assumption of a circular orbit. Motion within the C orbit should be discernible via future RV, AO, and speckle imaging studies within a couple of years. The C system (i.e. 212651213) has an RV and proper motion that differ from that of 212651234 by only \u223c1.4\u2009km\u2009s^(\u22121) and \u223c3 mas yr^(\u22121). This set of similar space velocities in three dimensions strongly implies that these two objects are also physically bound, making this at least a quintuple star system.", "date": "2016-07-19", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "462", "number": "2", "publisher": "Royal Astronomical Society", "pagerange": "1812-1825", "id_number": "CaltechAUTHORS:20160707-154622394", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160707-154622394", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "NNX09AF08G" }, { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144152" }, { "agency": "T\u00fcrkiye Bilimsel ve Teknolojik Ara\u015ft\u0131rma Kurumu (T\u00dcB\u0130TAK)", "grant_number": "T\u00dcB\u0130TAK-112T766" }, { "agency": "T\u00fcrkiye Bilimsel ve Teknolojik Ara\u015ft\u0131rma Kurumu (T\u00dcB\u0130TAK)", "grant_number": "T\u00dcB\u0130TAK-B\u0130DEP 2219" }, { "agency": "Croatian Science Foundation (HRZZ)", "grant_number": "2014-09-8656" }, { "agency": "Nemzeti Kutat\u00e1si, Fejleszt\u00e9si \u00e9s Innov\u00e1ci\u00f3s Hivatal (NKFIH)", "grant_number": "K-115709" }, { "agency": "Nemzeti Kutat\u00e1si, Fejleszt\u00e9si \u00e9s Innov\u00e1ci\u00f3s Hivatal (NKFIH)", "grant_number": "K-113117" }, { "agency": "Hungarian Academy of Sciences (MTA)", "grant_number": "LP2012-31" } ] }, "doi": "10.1093/mnras/stw1745", "primary_object": { "basename": "1606.06324v1__1_.pdf", "url": "https://authors.library.caltech.edu/records/zqj24-gnh02/files/1606.06324v1__1_.pdf" }, "related_objects": [ { "basename": "MNRAS-2016-Rappaport-1812-25.pdf", "url": "https://authors.library.caltech.edu/records/zqj24-gnh02/files/MNRAS-2016-Rappaport-1812-25.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Rappaport, S.; Lehmann, H.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2gn2k-8df17", "eprint_id": 70250, "eprint_status": "archive", "datestamp": "2023-08-20 12:49:37", "lastmod": "2023-10-20 22:03:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kuhn-R-B", "name": { "family": "Kuhn", "given": "Rudolf B." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "KELT-10b: the first transiting exoplanet from the KELT-South survey \u2013 a hot sub-Jupiter transiting a V= 10.7 early G-star", "ispublished": "pub", "full_text_status": "public", "keywords": "techniques: photometric, techniques: radial velocities, techniques: spectroscopic, stars: individual: KELT-10, planetary systems", "note": "\u00a9 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. \n\nAccepted 2016 April 12. Received 2016 March 8; in original form 2015 September 8. \n\nKELT-South is hosted by the South African Astronomical Observatory and we are grateful for their ongoing support and assistance. KP acknowledges support from NASA grant NNX13AQ62G. Work by BSG and DJS was partially supported by NSF CAREER Grant AST-1056524. \n\nThis research has made use of the Exoplanet Orbit Database and the Exoplanet Data Explorer at exoplanets.org (Han et al. 2014). This work has made use of NASA's Astrophysics Data System, the Extrasolar Planet Encyclopaedia at exoplanet.eu (Schneider et al. 2011), the SIMBAD data base (Wenger et al. 2000) operated at CDS, Strasbourg, France, and the VizieR catalogue access tool, CDS, Strasbourg, France (Ochsenbein, Bauer & Marcout 2000). This paper makes use of data and services from NASA Exoplanet Archive (Akeson et al. 2013), which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This research has made use of TEPCat at http://www.astro.keele.ac.uk/jkt/tepcat/ (Southworth 2011). \n\nThis publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. \n\nThis research was made possible through the use of the AAVSO Photometric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund. This paper uses observations obtained with facilities of the Las Cumbres Observatory Global Telescope.\n\nPublished - MNRAS-2016-Kuhn-4281-98.pdf
Submitted - 1509.02323v2.pdf
Supplemental Material - suppl_data.zip
", "abstract": "We report the discovery of KELT-10b, the first transiting exoplanet discovered using the KELT-South telescope. KELT-10b is a highly inflated sub-Jupiter mass planet transiting a relatively bright V = 10.7 star (TYC 8378-64-1), with T_(eff) = 5948 \u00b1 74 K, log\u2009g = 4.319^(+0.020)_(\u22120.030) and [Fe/H] = 0.09^(+0.11)_(\u22120.10), an inferred mass M^* = 1.112^(+0.055)_(\u22120.061) M_\u2299 and radius R^* = 1.209^(+0.047)_(\u22120.035) R_\u2299. The planet has a radius Rp = 1.399^(+0.069)_(\u22120.049) RJ and mass Mp = 0.679^(+0.039)_(\u22120.038) MJ. The planet has an eccentricity consistent with zero and a semimajor axis a = 0.05250^(+0.00086)_(\u22120.00097) au. The best-fitting linear ephemeris is T_0 = 2457 066.720 45 \u00b1 0.000 27 BJD_(TDB) and P = 4.166 2739 \u00b1 0.000 0063 d. This planet joins a group of highly inflated transiting exoplanets with a larger radius and smaller mass than that of Jupiter. The planet, which boasts deep transits of 1.4 per cent, has a relatively high equilibrium temperature of T_(eq) = 1377^(+28)_(\u221223) K, assuming zero albedo and perfect heat redistribution. KELT-10b receives an estimated insolation of 0.817^(+0.068)_(\u22120.054) \u00d7 10^9 erg s^(\u22121) cm^(\u22122), which places it far above the insolation threshold above which hot Jupiters exhibit increasing amounts of radius inflation. Evolutionary analysis of the host star suggests that KELT-10b may not survive beyond the current subgiant phase, depending on the rate of in-spiral of the planet over the next few Gyr. The planet transits a relatively bright star and exhibits the third largest transit depth of all transiting exoplanets with V < 11 in the Southern hemisphere, making it a promising candidate for future atmospheric characterization studies.", "date": "2016-07-11", "date_type": "published", "publication": "Monthly Notices of the Royal Astronomical Society", "volume": "459", "number": "4", "publisher": "Royal Astronomical Society", "pagerange": "4281-4298", "id_number": "CaltechAUTHORS:20160909-124312304", "issn": "0035-8711", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160909-124312304", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX13AQ62G" }, { "agency": "NSF", "grant_number": "AST-1056524" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Robert Martin Ayers Sciences Fund" } ] }, "doi": "10.1093/mnras/stw880", "primary_object": { "basename": "suppl_data.zip", "url": "https://authors.library.caltech.edu/records/2gn2k-8df17/files/suppl_data.zip" }, "related_objects": [ { "basename": "1509.02323v2.pdf", "url": "https://authors.library.caltech.edu/records/2gn2k-8df17/files/1509.02323v2.pdf" }, { "basename": "MNRAS-2016-Kuhn-4281-98.pdf", "url": "https://authors.library.caltech.edu/records/2gn2k-8df17/files/MNRAS-2016-Kuhn-4281-98.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Kuhn, Rudolf B. and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0htc8-rmq88", "eprint_id": 68896, "eprint_status": "archive", "datestamp": "2023-08-20 12:33:57", "lastmod": "2023-10-20 15:51:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "J. Chris" }, "orcid": "0000-0001-8982-1654" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } }, { "id": "Bartos-R-D", "name": { "family": "Bartos", "given": "Randall" } }, { "id": "K\u00fchn-J-G", "name": { "family": "K\u00fchn", "given": "Jonas" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Burruss-R-S", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Stellar Double Coronagraph: a multistage coronagraphic platform at Palomar Observatory", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 planets and satellites: detection", "note": "\u00a9 2016 The Astronomical Society of the Pacific. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. \n\nReceived 2015 October 22; accepted 2016 February 12; published 2016 June 13. \n\nWe are pleased to acknowledge the Palomar Observatory staff for their enthusiastic and excellent support. We thank the referee for a careful and thorough read, and comments which improved the paper. MB is supported by a NASA Space Technology Research Fellowship, grant NNX13AN42H. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - Bottom_2016_PASP_128_075003.pdf
Submitted - 1606.07134v1.pdf
", "abstract": "We present a new instrument, the \"Stellar Double Coronagraph,\" a flexible coronagraphic platform. Designed for Palomar Observatory's 200'' Hale telescope, its two focal and pupil planes allow for a number of different observing configurations, including multiple vortex coronagraphs in series for improved contrast at small angles. We describe the motivation, design, observing modes, wavefront control approaches, data reduction pipeline, and early science results. We also discuss future directions for the instrument.", "date": "2016-07", "date_type": "published", "publication": "Publications of the Astronomical Society of the Pacific", "volume": "128", "number": "965", "publisher": "Astronomical Society of the Pacific", "pagerange": "Art. No. 075003", "id_number": "CaltechAUTHORS:20160707-152646044", "issn": "0004-6280", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160707-152646044", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Space Technology Research Fellowship", "grant_number": "NNX13AN42H" }, { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/1538-3873/128/965/075003", "primary_object": { "basename": "Bottom_2016_PASP_128_075003.pdf", "url": "https://authors.library.caltech.edu/records/0htc8-rmq88/files/Bottom_2016_PASP_128_075003.pdf" }, "related_objects": [ { "basename": "1606.07134v1.pdf", "url": "https://authors.library.caltech.edu/records/0htc8-rmq88/files/1606.07134v1.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Bottom, Michael; Shelton, J. Chris; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9t5fd-nt533", "eprint_id": 74396, "eprint_status": "archive", "datestamp": "2023-08-20 12:29:12", "lastmod": "2024-01-13 20:24:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-Keith-Astronomy", "name": { "family": "Matthews", "given": "Keith" } }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" } ] }, "title": "Three years of harvest with the vector vortex coronagraph in the thermal infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, vortex phase mask, thermal infrared", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWe thank P. Baudoz and J. Parisot for maintaining and sharing with us the YACADIRE coronagraphic test bench at Observatoire de Paris-Meudon. We also thank all the people involved in the installation, commissioning, and operations of the AGPM at VLT, LBT, and Keck. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569), and from the French Community of Belgium through an ARC grant for Concerted Research Action. The W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The LBTI is funded by the National Aeronautics and Space Administration as part of its Exoplanet Exploration Program. The LBT is an international collaboration among institutions in the United States, Italy and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university\nsystem; Instituto Nazionale di Astrofisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. This research was supported by NASA's Origins of Solar Systems Program, grant NNX13AJ17G.\n\nPublished - 99080Q.pdf
Submitted - 1607.05003.pdf
", "abstract": "For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are currently designed to be used in the thermal infrared (ranging from 3 to 13 \u03bcm). Our AGPMs were first installed on VLT/NACO and VLT/VISIR in 2012, followed by LBT/LMIRCam in 2013 and Keck/NIRC2 in 2015. In this paper, we review the development, commissioning, on-sky performance, and early scientific results of these new coronagraphic modes and report on the lessons learned. We conclude with perspectives for future developments and applications.", "date": "2016-06-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 99080Q", "id_number": "CaltechAUTHORS:20170217-081902812", "isbn": "978-1-5106-0196-3", "book_title": "Ground-based and Airborne Instrumentation for Astronomy VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170217-081902812", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "W. M. Keck Foundation" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "NNX13AJ17G" } ] }, "contributors": { "items": [ { "id": "Evans-C-J", "name": { "family": "Evans", "given": "Christopher J." } }, { "id": "Simard-L", "name": { "family": "Simard", "given": "Luc" } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2233289", "primary_object": { "basename": "1607.05003.pdf", "url": "https://authors.library.caltech.edu/records/9t5fd-nt533/files/1607.05003.pdf" }, "related_objects": [ { "basename": "99080Q.pdf", "url": "https://authors.library.caltech.edu/records/9t5fd-nt533/files/99080Q.pdf" } ], "resource_type": "book_section", "pub_year": "2016", "author_list": "Absil, Olivier; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/314zg-zg951", "eprint_id": 65949, "eprint_status": "archive", "datestamp": "2023-08-20 11:25:24", "lastmod": "2023-10-18 16:57:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzalez", "given": "C. A." }, "orcid": "0000-0003-2050-1710" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Absil-Pierre-Antoine", "name": { "family": "Absil", "given": "P.-A." }, "orcid": "0000-0003-2946-4178" }, { "id": "Van-Droogenbroeck-M", "name": { "family": "Van Droogenbroeck", "given": "M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Low-rank plus sparse decomposition for exoplanet detection in direct-imaging ADI sequences. The LLSG algorithm", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: data analysis \u2013 techniques: high angular resolution \u2013 techniques: image processing \u2013 planetary systems \u2013 planets and satellites: detection", "note": "\u00a9 2016 ESO. Article published by EDP Sciences. \n\nReceived 17 September 2015; Accepted 20 January 2016; Published online 13 April 2016. \n\nWe would like to thank the anonymous referee for the very useful comments that helped us improve the quality of this paper. The research leading to these results has received funding from the European Research Council Under the European Union's Seventh Framework Program (ERC Grant Agreement No. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - aa27387-15.pdf
Submitted - 1602.08381v1.pdf
", "abstract": "Context. Data processing constitutes a critical component of high-contrast exoplanet imaging. Its role is almost as important as the choice of a coronagraph or a wavefront control system, and it is intertwined with the chosen observing strategy. Among the data processing techniques for angular differential imaging (ADI), the most recent is the family of principal component analysis (PCA) based algorithms. It is a widely used statistical tool developed during the first half of the past century. PCA serves, in this case, as a subspace projection technique for constructing a reference point spread function (PSF) that can be subtracted from the science data for boosting the detectability of potential companions present in the data. Unfortunately, when building this reference PSF from the science data itself, PCA comes with certain limitations such as the sensitivity of the lower dimensional orthogonal subspace to non-Gaussian noise.\n\nAims. Inspired by recent advances in machine learning algorithms such as robust PCA, we aim to propose a localized subspace projection technique that surpasses current PCA-based post-processing algorithms in terms of the detectability of companions at near real-time speed, a quality that will be useful for future direct imaging surveys.\n\nMethods. We used randomized low-rank approximation methods recently proposed in the machine learning literature, coupled with entry-wise thresholding to decompose an ADI image sequence locally into low-rank, sparse, and Gaussian noise components (LLSG). This local three-term decomposition separates the starlight and the associated speckle noise from the planetary signal, which mostly remains in the sparse term. We tested the performance of our new algorithm on a long ADI sequence obtained on \u03b2 Pictoris with VLT/NACO.\n\nResults. Compared to a standard PCA approach, LLSG decomposition reaches a higher signal-to-noise ratio and has an overall better performance in the receiver operating characteristic space. This three-term decomposition brings a detectability boost compared to the full-frame standard PCA approach, especially in the small inner working angle region where complex speckle noise prevents PCA from discerning true companions from noise.", "date": "2016-05", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "589", "publisher": "EDP Sciences", "pagerange": "Art. No. A54", "id_number": "CaltechAUTHORS:20160405-195255205", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160405-195255205", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Actions de Recherche Concertees (Communaut\u00e9 Fran\u00e7aise de Belgique)" } ] }, "doi": "10.1051/0004-6361/201527387", "primary_object": { "basename": "1602.08381v1.pdf", "url": "https://authors.library.caltech.edu/records/314zg-zg951/files/1602.08381v1.pdf" }, "related_objects": [ { "basename": "aa27387-15.pdf", "url": "https://authors.library.caltech.edu/records/314zg-zg951/files/aa27387-15.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Gomez Gonzalez, C. A.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ferz7-bvs57", "eprint_id": 65933, "eprint_status": "archive", "datestamp": "2023-08-20 11:10:29", "lastmod": "2023-10-18 16:56:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jensen-Clem-R-M", "name": { "family": "Jensen-Clem", "given": "Rebecca" }, "orcid": "0000-0003-0054-2953" }, { "id": "Millar-Blanchaer-M-A", "name": { "family": "Millar-Blanchaer", "given": "Max" }, "orcid": "0000-0001-6205-9233" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "James R." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Wiktorowicz-S-J", "name": { "family": "Wiktorowicz", "given": "Sloane J." }, "orcid": "0000-0003-4483-5037" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Marley-M-S", "name": { "family": "Marley", "given": "Mark S." }, "orcid": "0000-0002-5251-2943" }, { "id": "Fitzgerald-M-P", "name": { "family": "Fitzgerald", "given": "Michael P." }, "orcid": "0000-0002-0176-8973" }, { "id": "Oppenheimer-Rebecca", "name": { "family": "Oppenheimer", "given": "Rebecca" }, "orcid": "0000-0001-7130-7681" }, { "id": "Ammons-S-M", "name": { "family": "Ammons", "given": "S. Mark" }, "orcid": "0000-0001-5172-7902" }, { "id": "Rantakyro-F-T", "name": { "family": "Rantakyro", "given": "Fredrik T." } }, { "id": "Marchis-F", "name": { "family": "Marchis", "given": "Franck" }, "orcid": "0000-0001-7016-7277" } ] }, "title": "Point Source Polarimetry with the Gemini Planet Imager: Sensitivity Characterization with T5.5 Dwarf Companion HD 19467 B", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 stars: individual (HD 19467) \u2013 techniques: high angular resolution \u2013 techniques: polarimetric", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2015 October 7; accepted 2016 January 6; published 2016 March 29. \n\nThis material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1144469. This work was performed in part under contract with the California Institute of Technology (Caltech) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute, and under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.\n\nPublished - Jensen-Clem_2016_ApJ_820_111.pdf
Submitted - 1601.01353v1.pdf
", "abstract": "Detecting polarized light from self-luminous exoplanets has the potential to provide key information about rotation, surface gravity, cloud grain size, and cloud coverage. While field brown dwarfs with detected polarized emission are common, no exoplanet or substellar companion has yet been detected in polarized light. With the advent of high contrast imaging spectro-polarimeters such as GPI and SPHERE, such a detection may now be possible with careful treatment of instrumental polarization. In this paper, we present 28 minutes of H-band GPI polarimetric observations of the benchmark T5.5 companion HD 19467 B. We detect no polarization signal from the target, and place an upper limit on the degree of linear polarization of p_(CL99.73%) \u2a7d 2.4%. We discuss our results in the context of T dwarf cloud models and photometric variability.", "date": "2016-04-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "820", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 111", "id_number": "CaltechAUTHORS:20160405-121401791", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160405-121401791", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144469" }, { "agency": "NASA Sagan Fellowship" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-AC52-07NA27344" } ] }, "doi": "10.3847/0004-637X/820/2/111", "primary_object": { "basename": "1601.01353v1.pdf", "url": "https://authors.library.caltech.edu/records/ferz7-bvs57/files/1601.01353v1.pdf" }, "related_objects": [ { "basename": "Jensen-Clem_2016_ApJ_820_111.pdf", "url": "https://authors.library.caltech.edu/records/ferz7-bvs57/files/Jensen-Clem_2016_ApJ_820_111.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Jensen-Clem, Rebecca; Millar-Blanchaer, Max; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4fxff-axc63", "eprint_id": 87171, "eprint_status": "archive", "datestamp": "2023-08-22 17:42:47", "lastmod": "2023-10-18 20:55:06", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Sauvage-J-F", "name": { "family": "Sauvage", "given": "Jean Francois" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "SAXO: the extreme adaptive optics system of SPHERE (I) system overview and global laboratory performance", "ispublished": "pub", "full_text_status": "public", "keywords": "adaptive optics; coronagraph; high contrast imaging; wavefront sensing; control; phase diversity; Shack\u2013Hartmann", "note": "\u00a9 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nPaper 15058 received Jul. 23, 2015; accepted for publication Mar. 31, 2016; published online May 24, 2016. \n\nThis work was partly funded by the European Commission under FP7 Grant Agreement No. 312430 Optical Infrared Coordination Network for Astronomy, and by the Office National d'Etudes et de Recherches Aerospatiales (ONERA) in the frame of the NAIADE Research Project. SPHERE is an instrument designed and built by a consortium consisting of IPAG, MPIA, LAM, LESIA, Laboratoire Fizeau, INAF, Observatoire de Geneve, ETH, NOVA, ONERA and ASTRON in collaboration with ESO. The authors want to thank ESO and SPHERE consortium for implication and participation to AIT of SAXO instrument. The HODM has been provided by the CILAS company through a joint research and development effort under funding from the European Commission Sixth Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under Grant No. RII3-Ct-2004-001566 (2004-2008).\n\nPublished - 025003.pdf
", "abstract": "The direct imaging of exoplanet is a leading field of today's astronomy. The photons coming from the planet carry precious information on the chemical composition of its atmosphere. The second-generation instrument, Spectro-Polarimetric High contrast Exoplanet Research (SPHERE), dedicated to detection, photometry and spectral characterization of Jovian-like planets, is now in operation on the European very large telescope. This instrument relies on an extreme adaptive optics (XAO) system to compensate for atmospheric turbulence as well as for internal errors with an unprecedented accuracy. We demonstrate the high level of performance reached by the SPHERE XAO system (SAXO) during the assembly integration and test (AIT) period. In order to fully characterize the instrument quality, two AIT periods have been mandatory. In the first phase at Observatoire de Paris, the performance of SAXO itself was assessed. In the second phase at IPAG Grenoble Observatory, the operation of SAXO in interaction with the overall instrument has been optimized. In addition to the first two phases, a final check has been performed after the reintegration of the instrument at Paranal Observatory, in the New Integration Hall before integration at the telescope focus. The final performance aimed by the SPHERE instrument with the help of SAXO is among the highest Strehl ratio pretended for an operational instrument (90% in H band, 43% in V band in a realistic turbulence r0, and wind speed condition), a limit R magnitude for loop closure at 15, and a robustness to high wind speeds. The full-width at half-maximum reached by the instrument is 40 mas for infrared in H band and unprecedented 18.5 mas in V band.", "date": "2016-04", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "2", "number": "2", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 025003", "id_number": "CaltechAUTHORS:20180615-155611063", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-155611063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "312430" }, { "agency": "Office National d'Etudes et de Recherches Aerospatiales (ONERA)" }, { "agency": "European Commission", "grant_number": "RII3-Ct-2004-001566" } ] }, "doi": "10.1117/1.JATIS.2.2.025003", "primary_object": { "basename": "025003.pdf", "url": "https://authors.library.caltech.edu/records/4fxff-axc63/files/025003.pdf" }, "resource_type": "article", "pub_year": "2016", "author_list": "Sauvage, Jean Francois and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/64134-pej53", "eprint_id": 65942, "eprint_status": "archive", "datestamp": "2023-08-20 10:46:29", "lastmod": "2023-10-18 16:56:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lehmann-H", "name": { "family": "Lehmann", "given": "H." } }, { "id": "Borkovits-T", "name": { "family": "Borkovits", "given": "T." }, "orcid": "0000-0002-8806-496X" }, { "id": "Rappaport-S-A", "name": { "family": "Rappaport", "given": "S. A." } }, { "id": "Ngo-Henry-Hoang-Khoi-Exoplanets", "name": { "family": "Ngo", "given": "Henry" }, "orcid": "0000-0001-5172-4859" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Csizmadia-Sz", "name": { "family": "Csizmadia", "given": "Sz." } }, { "id": "Forg\u00e1cs-Dajka-E", "name": { "family": "Forg\u00e1cs-Dajka", "given": "E." } } ] }, "title": "KIC 7177553: a quadruple system of two close binaries", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: eclipsing \u2013 binaries: spectroscopic \u2013 planetary systems \u2013 stars: fundamental parameters", "note": "\u00a9 2016 The American Astronomical Society. \n\nReceived 2015 November 20; accepted 2016 January 10; published 2016 February 25. \n\nThis work is based on observations with the 2 m Alfred Jensch Telescope of the Th\u00fcringer Landessternwarte Tautenburg. It has made use of data collected by the Kepler satellite mission, which is funded by the NASA Science Mission directorate. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The observatory was made possible by the generous financial support of the W. M. Keck Foundation. This work has made use of the VALD database, operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. The project has been supported by the Hungarian OTKA Grant K113117.\n\nPublished - apj_819_1_33.pdf
Submitted - 1601.02926v1.pdf
", "abstract": "KIC 7177553 was observed by the Kepler satellite to be an eclipsing eccentric binary star system with an 18-day orbital period. Recently, an eclipse timing study of the Kepler binaries has revealed eclipse timing variations (ETVs) in this object with an amplitude of ~100 s and an outer period of 529 days. The implied mass of the third body is that of a super-Jupiter, but below the mass of a brown dwarf. We therefore embarked on a radial velocity (RV) study of this binary to determine its system configuration and to check the hypothesis that it hosts a giant planet. From the RV measurements, it became immediately obvious that the same Kepler target contains another eccentric binary, this one with a 16.5-day orbital period. Direct imaging using adaptive optics reveals that the two binaries are separated by 0\".4 (~167 AU) and have nearly the same magnitude (to within 2%). The close angular proximity of the two binaries and very similar \u03b3 velocities strongly suggest that KIC 7177553 is one of the rare SB4 systems consisting of two eccentric binaries where at least one system is eclipsing. Both systems consist of slowly rotating, nonevolved, solar-like stars of comparable masses. From the orbital separation and the small difference in \u03b3 velocity, we infer that the period of the outer orbit most likely lies in the range of 1000\u20133000 yr. New images taken over the next few years, as well as the high-precision astrometry of the Gaia satellite mission, will allow us to set much narrower constraints on the system geometry. Finally, we note that the observed ETVs in the Kepler data cannot be produced by the second binary. Further spectroscopic observations on a longer timescale will be required to prove the existence of the massive planet.", "date": "2016-03-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "819", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 33", "id_number": "CaltechAUTHORS:20160405-145448005", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160405-145448005", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA" }, { "agency": "W. M. Keck Foundation" }, { "agency": "Hungarian Scientific Research Fund (OTKA)", "grant_number": "K113117" } ] }, "doi": "10.3847/0004-637X/819/1/33", "primary_object": { "basename": "1601.02926v1.pdf", "url": "https://authors.library.caltech.edu/records/64134-pej53/files/1601.02926v1.pdf" }, "related_objects": [ { "basename": "apj_819_1_33.pdf", "url": "https://authors.library.caltech.edu/records/64134-pej53/files/apj_819_1_33.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Lehmann, H.; Borkovits, T.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dacy6-82427", "eprint_id": 66611, "eprint_status": "archive", "datestamp": "2023-08-20 10:41:52", "lastmod": "2023-10-18 18:37:44", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vigan-A", "name": { "family": "Vigan", "given": "A." }, "orcid": "0000-0002-5902-7828" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "First light of the VLT planet finder SPHERE I. Detection and characterization of the substellar companion GJ 758B", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: data analysis \u2013 techniques: high angular resolution \u2013 techniques: image processing \u2013 stars: individual: GJ 758 \u2013 brown dwarfs", "note": "\u00a9 2016 ESO. \n\nReceived 4 May 2015. Accepted 5 November 2015. \n\nA.V., M.B., G.C., G.S., J.-L.B., and D.M. acknowledge support in France from the French National Research Agency (ANR) through project grant ANR10-BLANC0504-01, the CNRS-D2P PICS grant, and the Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS). J.-L.Ba.'s Ph.D is funded by the LabEx Exploration Spatiale des Environnements Plan\u00e9taires (ESEP) #2011-LABX-030. V.D. is partially supported by the Australian Research Council. V.D., S.D., A.L.M., R.G., and D.M. acknowledge support from the Progetti Premiali funding scheme of the Italian Ministry of Education, University, and Research. E.B. and J.H. are supported by the Swiss National Science Foundation (SNSF). A.Z. acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant Nucleus RC130007. The authors warmly thank A. Bellini and J. Anderson for kindly providing the catalog positions of the stars in the 47\u2009Tuc field before their publication. We are very grateful to D. Kirkpatrick, A. Burgasser, D. Pinfield, B. Burningham, and G. Mace for sending us the spectra of benchmark T\u2013Y objects. We thank C. Morley, D. Saumon, and F. Allard for free online access to their atmospheric model grids, and F. Bouchy for his help with the ELODIE data. This research has benefitted from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/~adam/browndwarfs/spexprism. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. SPHERE is an instrument designed and built by a consortium consisting of IPAG (Grenoble, France), MPIA (Heidelberg, Germany), LAM (Marseille, France), LESIA (Paris, France), Laboratoire Lagrange (Nice, France), INAF \u2013 Osservatorio di Padova (Italy), Observatoire de Gen\u00e8ve (Switzerland), ETH Zurich (Switzerland), NOVA (Netherlands), ONERA (France) and ASTRON (Netherlands), in collaboration with ESO. SPHERE was funded by ESO, with additional contributions from CNRS (France), MPIA (Germany), INAF (Italy), FINES (Switzerland), and NOVA (Netherlands). SPHERE also received funding from the European Commission Sixth and Seventh Framework Programmes as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under grant number RII3-Ct-2004-001566 for FP6 (2004\u20132008), grant number 226604 for FP7 (2009\u20132012), and grant number 312430 for FP7 (2013\u20132016).\n\nPublished - aa26465-15.pdf
Submitted - 1511.04076v1.pdf
", "abstract": "GJ\u2009758\u2009B is a brown dwarf companion to a nearby (15.76%) solar-type, metal-rich (M / H = + 0.2 dex) main-sequence star (G9V) that was discovered with Subaru/HiCIAO in 2009. From previous studies, it has drawn attention as being the coldest (~600 K) companion ever directly imaged around a neighboring star. We present new high-contrast data obtained during the commissioning of the SPHERE instrument at the Very Large Telescope (VLT). The data was obtained in Y-, J-, H-, and K_s-bands with the dual-band imaging (DBI) mode of IRDIS, thus providing a broad coverage of the full near-infrared (near-IR) range at higher contrast and better spectral sampling than previously reported. In this new set of high-quality data, we report the re-detection of the companion, as well as the first detection of a new candidate closer-in to the star. We use the new eight photometric points for an extended comparison of GJ\u2009758\u2009B with empirical objects and four families of atmospheric models. From comparison to empirical object, we estimate a T8 spectral type, but none of the comparison objects can accurately represent the observed near-IR fluxes of GJ\u2009758\u2009B. From comparison to atmospheric models, we attribute a T_(eff) = 600 \u00b1 100 K, but we find that no atmospheric model can adequately fit all the fluxes of GJ\u2009758\u2009B. The lack of exploration of metal enrichment in model grids appears as a major limitation that prevents an accurate estimation of the companion physical parameters. The photometry of the new candidate companion is broadly consistent with L-type objects, but a second epoch with improved photometry is necessary to clarify its status. The new astrometry of GJ\u2009758\u2009B shows a significant proper motion since the last epoch. We use this result to improve the determination of the orbital characteristics using two fitting approaches: Least-Squares Monte Carlo and Markov chain Monte Carlo. We confirm the high-eccentricity of the orbit (peak at 0.5), and find a most likely semi-major axis of 46.05 AU. We also use our imaging data, as well as archival radial velocity data, to reject the possibility that this is a false positive effect created by an unseen, closer-in, companion. Finally, we analyze the sensitivity of our data to additional closer-in companions and reject the possibility of other massive brown dwarf companions down to 4\u20135 AU.", "date": "2016-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "587", "publisher": "EDP Sciences", "pagerange": "Art. No. A55", "id_number": "CaltechAUTHORS:20160503-091027766", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160503-091027766", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR10-BLANC0504-01" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS)" }, { "agency": "LabEx Exploration Spatiale des Environnements Plan\u00e9taires (ESEP)", "grant_number": "2011-LABX-030" }, { "agency": "Australian Research Council" }, { "agency": "Ministero dell'Istruzione, dell'Universit\u00e0 e della Ricerca (MIUR)" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "Millennium Science Initiative (Chilean Ministry of Economy)", "grant_number": "Nucleus RC130007" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "Max Planck Institute for Astronomy (MPIA)" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "FINES (Switzerland)" }, { "agency": "Nederlandse Onderzoekschool voor de Astronomie (NOVA)" }, { "agency": "European Commission Sixth and Seventh Framework Programmes", "grant_number": "RII3-Ct-2004-001566 (OPTICON)" }, { "agency": "European Research Council (ERC)", "grant_number": "226604" }, { "agency": "European Research Council (ERC)", "grant_number": "312430 (OPTICON)" } ] }, "doi": "10.1051/0004-6361/201526465", "primary_object": { "basename": "1511.04076v1.pdf", "url": "https://authors.library.caltech.edu/records/dacy6-82427/files/1511.04076v1.pdf" }, "related_objects": [ { "basename": "aa26465-15.pdf", "url": "https://authors.library.caltech.edu/records/dacy6-82427/files/aa26465-15.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Vigan, A. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/swcwg-bha86", "eprint_id": 66614, "eprint_status": "archive", "datestamp": "2023-08-20 10:41:57", "lastmod": "2023-10-18 18:38:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Maire-A-L", "name": { "family": "Maire", "given": "A.-L." }, "orcid": "0000-0002-2591-4138" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "First light of the VLT planet finder SPHERE II. The physical properties and the architecture of the young systems PZ Telescopii and HD 1160 revisited", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 stars: individual: PZ Telescopii \u2013 stars: individual: HD 1160 \u2013 techniques: high angular resolution \u2013 techniques: image processing \u2013 techniques: spectroscopic", "note": "\u00a9 ESO 2016. \n\nReceived 25 May 2015. Accepted 13 October 2015. \n\nWe thank the anonymous referee for a constructive report on the manuscript and Daniel Rouan for helpful suggestions. The authors are grateful to the Consortium and the ESO Paranal Staff for making SPHERE a reality. The authors warmly thank Andrea Bellini and Jay Anderson for kindly providing the catalog positions of the stars in the 47 Tuc field before their publication. We are also grateful to ESO for releasing the commissioning data for publication. A.-L.M., S.M., D.M., R.G., S.D., R.U.C., and A.Z. acknowledge support from the \"Progetti Premiali\" funding scheme of the Italian Ministry of Education, University, and Research. A.-L.M. thanks the MPIA for support during the last stages of this work. A.V., M.B., G.C., and D.M. acknowledge financial support from the French National Research Agency (ANR) through the GUEPARD project grant ANR10-BLANC0504-01, the CNRS-D2P PICS grant, and the Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS). D.E. acknowledges the financial support of the Swiss National Science Fundation (SNSF) through the National Centre for Competence in Research \"PlanetS\". A.Z. acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant \"Nucleus RC130007\". This research has benefitted from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/~adam/browndwarfs/spexprism. This research made use of the SIMBAD data base, as well as the VizieR catalog access tool, both operated at the CDS, Strasbourg, France. The original description of the VizieR service was published in Ochsenbein et al. (2000, A&AS, 143, 23). SPHERE is an instrument designed and built by a consortium consisting of IPAG (Grenoble, France), MPIA (Heidelberg, Germany), LAM (Marseille, France), LESIA (Paris, France), Laboratoire Lagrange (Nice, France), INAF \u2212 Osservatorio di Padova (Italy), Observatoire de Gen\u00e8ve (Switzerland), ETH Zurich (Switzerland), NOVA (Netherlands), ONERA (France), and ASTRON (Netherlands), in collaboration with ESO. SPHERE was funded by ESO, with additional contributions from the CNRS (France), MPIA (Germany), INAF (Italy), FINES (Switzerland), and NOVA (Netherlands). SPHERE also received funding from the European Commission Sixth and Seventh Framework Programs as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under grant number RII3-Ct-2004-001566 for FP6 (2004\u22122008), grant number 226604 for FP7 (2009\u22122012), and grant number 312430 for FP7 (2013\u22122016).\n\nPublished - aa26594-15.pdf
", "abstract": "Context. The young systemsPZ Tel and HD 1160, hosting known low-mass companions, were observed during the commissioning of the new planet finder of the Very Large Telescope (VLT) SPHERE with several imaging and spectroscopic modes.\nAims. We aim to refine the physical properties and architecture of both systems.\nMethods. We use SPHERE commissioning data and dedicated Rapid Eye Mount (REM) observations, as well as literature and unpublished data from VLT/SINFONI, VLT/NaCo, Gemini/NICI, and Keck/NIRC2. \nResults. We derive new photometry and confirm the short-term (P = 0.94 d) photometric variability of the star PZ Tel A with values of 0.14 and 0.06 mag at optical and near-infrared wavelengths, respectively. We note from the comparison to literature data spanning 38 yr that the star also exhibits a long-term variability trend with a brightening of ~0.25 mag. The 0.63\u22123.8 \u03bcm spectral energy distribution of PZ Tel B (separation ~25 AU) allows us to revise its physical characteristics: spectral type M7 \u00b1 1, T_(eff)\u2009=\u20092700\u2009\u00b1\u2009100 K, log(g)\u2009<\u20094.5 dex, luminosity log(L/L_\u2299)\u2009=\u2009\u22122.51\u2009\u00b1\u20090.10 dex, and mass 38\u221272 M_J from \"hot-start\" evolutionary models combining the ranges of the temperature and luminosity estimates. The 1\u22123.8 \u03bcm SED of HD 1160 B (~85 au) suggests a massive brown dwarf or a low-mass star with spectral type M6.0^(+1.0)_(-0.5), T_(eff)\u2009=\u20093000\u2009\u00b1\u2009100 K, subsolar metallicity [M/H] = \u22120.5\u22120.0 dex, luminosity log(L/L_\u2299)\u2009=\u2009\u22122.81\u2009\u00b1\u20090.10 dex, and mass 39\u2212166 M_J. The physical properties derived for HD 1160 C (~560 au) from K_sL\u2032-band photometry are consistent with the discovery study. The orbital study of PZ Tel B confirms its deceleration and the high eccentricity of its orbit (e > 0.66). For eccentricities below 0.9, the inclination, longitude of the ascending node, and time of periastron passage are well constrained. In particular, both star and companion inclinations are compatible with a system seen edge-on. Based on \"hot-start\" evolutionary models, we reject other brown dwarf candidates outside 0.25\" for both systems, and giant planet companions outside 0.5\" that are more massive than 3 MJ for the PZ Tel system. We also show that K1\u2212K2 color can be used along with YJH low-resolution spectra to identify young L-type companions, provided high photometric accuracy (\u22640.05 mag) is achieved.\nConclusions. SPHERE opens new horizons in the study of young brown dwarfs and giant exoplanets using direct imaging thanks to high-contrast imaging capabilities at optical (0.5\u22120.9 \u03bcm) and near-infrared (0.95\u22122.3 \u03bcm) wavelengths, as well as high signal-to-noise spectroscopy in the near-infrared domain (0.95\u22122.3 \u03bcm) from low resolutions (R ~ 30\u221250) to medium resolutions (R ~ 350).", "date": "2016-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "587", "publisher": "EDP Sciences", "pagerange": "Art. No. A56", "id_number": "CaltechAUTHORS:20160503-095241937", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160503-095241937", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Ministero dell'Istruzione, dell'Universit\u00e0 e della Ricerca (MIUR)" }, { "agency": "Max Planck Institute for Astronomy (MPIA)" }, { "agency": "Agence Nationale de la Recherche (ANR)", "grant_number": "ANR10-BLANC0504-01" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS)" }, { "agency": "Swiss National Science Fundation (SNSF)" }, { "agency": "Millennium Science Initiative (Chile Ministry of Economy)", "grant_number": "RC130007" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "FINES (Switzerland)" }, { "agency": "Nederlandse Onderzoekschool voor de Astronomie (NOVA)" }, { "agency": "European Commission Sixth and Seventh Framework Programmes", "grant_number": "RII3-Ct-2004-001566 (OPTICON)" }, { "agency": "European Research Council (ERC)", "grant_number": "226604" } ] }, "doi": "10.1051/0004-6361/201526594", "primary_object": { "basename": "aa26594-15.pdf", "url": "https://authors.library.caltech.edu/records/swcwg-bha86/files/aa26594-15.pdf" }, "resource_type": "article", "pub_year": "2016", "author_list": "Maire, A.-L. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g26ms-zvt67", "eprint_id": 66608, "eprint_status": "archive", "datestamp": "2023-08-20 10:41:45", "lastmod": "2023-10-18 18:37:36", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Zurlo-A", "name": { "family": "Zurlo", "given": "A." }, "orcid": "0000-0002-5903-8316" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "First light of the VLT planet finder SPHERE III. New spectrophotometry and astrometry of the HR8799 exoplanetary system", "ispublished": "pub", "full_text_status": "public", "keywords": "techniques: image processing \u2013 astrometry \u2013 techniques: high angular resolution \u2013 techniques: spectroscopic \u2013 methods: data analysis", "note": "\u00a9 2016 ESO. \n\nReceived 25 June 2015. Accepted 2 November 2015. \n\nWe acknowledge the two anonymous referees for their constructive comments. We are grateful to the SPHERE team and all the people at Paranal for the great effort during SPHERE commissioning runs. We especially thank A. Bellini and J. Anderson for the HST astrometric measurements.\nA.Z. acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant \"Nucleus RC130007\". D.M., A.-L.M., R.G., R.U.C., S.D. acknowledge support from the \"Progetti Premiali\" funding\nscheme of the Italian Ministry of Education, University, and Research. We acknowledge support from the French National Research Agency (ANR) through the GUEPARD project grant ANR10-BLANC0504-01 and the Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP and PNPS). Part of this work has been carried out within the frame of the National Centre for Competence in Research PlanetS supported by the Swiss National Science Foundation. S.P.Q. and M.R.M. acknowledge the financial support of the SNSF.\nThe author thanks Sebasti\u00e1n Per\u00e9z for his help in solving unsolvable latex problems. SPHERE is an instrument designed and built by a consortium consisting of IPAG (Grenoble, France), MPIA (Heidelberg, Germany), LAM (Marseille,\nFrance), LESIA (Paris, France), Laboratoire Lagrange (Nice, France), INAF \u2013 Osservatorio di Padova (Italy), Observatoire de Gen\u00e8ve (Switzerland), ETH Zurich (Switzerland), NOVA (Netherlands), ONERA (France), and ASTRON (Netherlands), in collaboration with ESO. SPHERE was funded by ESO, with additional contributions from CNRS (France), MPIA (Germany), INAF (Italy), FINES (Switzerland), and NOVA (Netherlands). SPHERE also received funding from the European Commission Sixth and Seventh Framework Programmes as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under grant number RII3-Ct-2004-001566 for FP6 (2004\u20132008), grant number\n226604 for FP7 (2009-2012) and grant number 312430 for FP7 (2013\u20132016).\n\nPublished - aa26835-15.pdf
Submitted - 1511.04083v1.pdf
", "abstract": "Context. The planetary system discovered around the young A-type HR\u20098799 provides a unique laboratory to: a) test planet formation theories; b) probe the diversity of system architectures at these separations, and c) perform comparative (exo)planetology.\n\nAims. We present and exploit new near-infrared images and integral-field spectra of the four gas giants surrounding HR\u20098799 obtained with SPHERE, the new planet finder instrument at the Very Large Telescope, during the commissioning and science verification phase of the instrument (July\u2013December 2014). With these new data, we contribute to completing the spectral energy distribution (SED) of these bodies in the 1.0\u20132.5 \u03bcm range. We also provide new astrometric data, in particular for planet e, to further constrain the orbits.\n\nMethods. We used the infrared dual-band imager and spectrograph (IRDIS) subsystem to obtain pupil-stabilized, dual-band H2H3 (1.593 \u03bcm, 1.667 \u03bcm), K1K2 (2.110 \u03bcm, 2.251 \u03bcm), and broadband J (1.245 \u03bcm) images of the four planets. IRDIS was operated in parallel with the integral field spectrograph (IFS) of SPHERE to collect low-resolution (R ~ 30), near-infrared (0.94\u20131.64 \u03bcm) spectra of the two innermost planets HR\u20098799\u2009d and e. The data were reduced with dedicated algorithms, such as the Karhunen-Lo\u00e8ve image projection (KLIP), to reveal the planets. We used the so-called negative planets injection technique to extract their photometry, spectra, and measure their positions. We illustrate the astrometric performance of SPHERE through sample orbital fits compatible with SPHERE and literature data.\n\nResults. We demonstrated the ability of SPHERE to detect and characterize planets in this kind of systems, providing spectra and photometry of its components. The spectra improve upon the signal-to-noise ratio of previously obtained data and increase the spectral coverage down to the Y band. In addition, we provide the first detection of planet e in the J band. Astrometric positions for planets HR\u20098799\u2009bcde are reported for the epochs of July, August, and December 2014. We measured the photometric values in J, H2H3, K1K2 bands for the four planets with a mean accuracy of 0.13 mag. We found upper limit constraints on the mass of a possible planet f of 3\u20137 M_(Jup). Our new measurements are more consistent with the two inner planets d and e being in a 2d:1e or 3d:2e resonance. The spectra of HR\u20098799\u2009d and e are well matched by those of L6-8 field dwarfs. However, the SEDs of these objects are redder than field L dwarfs longward of 1.6 \u03bcm.", "date": "2016-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "587", "publisher": "EDP Sciences", "pagerange": "Art. No. A57", "id_number": "CaltechAUTHORS:20160503-085018443", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160503-085018443", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Millennium Science Initiative, Chilean ministry of Economy", "grant_number": "Nucleus RC130007" }, { "agency": "Ministero dell'Istruzione, dell'Universit\u00e0 e della Ricerca (MIUR)" }, { "agency": "Agence Nationale de la Recherche (ANR)", "grant_number": "ANR10-BLANC0504-01" }, { "agency": "Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP and PNPS)" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Max Planck Institute for Astronomy (MPIA)" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "FINES (Switzerland)" }, { "agency": "Nederlandse Onderzoekschool voor de Astronomie (NOVA)" }, { "agency": "European Commission Sixth and Seventh Framework Programmes", "grant_number": "RII3-Ct-2004-001566 (OPTICON)" }, { "agency": "European Commission FP7", "grant_number": "226604" }, { "agency": "European Commission FP7", "grant_number": "312430" } ] }, "doi": "10.1051/0004-6361/201526835", "primary_object": { "basename": "1511.04083v1.pdf", "url": "https://authors.library.caltech.edu/records/g26ms-zvt67/files/1511.04083v1.pdf" }, "related_objects": [ { "basename": "aa26835-15.pdf", "url": "https://authors.library.caltech.edu/records/g26ms-zvt67/files/aa26835-15.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Zurlo, A. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ar5fr-30465", "eprint_id": 66568, "eprint_status": "archive", "datestamp": "2023-08-20 10:41:26", "lastmod": "2023-10-18 18:35:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bonnefoy-M", "name": { "family": "Bonnefoy", "given": "M." }, "orcid": "0000-0001-5579-5339" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "First light of the VLT planet finder SPHERE IV. Physical and chemical properties of the planet around HR8799", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution \u2013 stars: individual: HR8799 \u2013 planets and satellites: atmospheres \u2013\nplanets and satellites: detection \u2013 techniques: imaging spectroscopy \u2013 planets and satellites: fundamental parameters", "note": "\u00a9 2016 ESO. \n\nReceived 6 July 2015. Accepted 13 September 2015. \n\nWe are grateful to the SPHERE team and all the people at Paranal for the great effort during SPHERE commissioning runs. We thank Rebecca Oppenheimer, Laurent Pueyo, and Travis Barman for providing an access to their spectra of the HR8799 planets. We also thank P. Ingraham, G. Mace, J. Gizis, M. Liu, A. Schneider, D. Stephens, M. Cushing, B. Bowler, D. Kirkpatrick, P. Rojo, K. Allers, J. Patience, M.-E. Naud, and B. Gauza for sending us their spectra of young companions and dusty dwarfs. This research has benefitted from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at http://pono.ucsd.edu/~adam/browndwarfs/spexprism. M.B., G.Ch, A.-M.L., J.-L.B., F.A., D.H. and D.M. acknowledge support from the French National Research Agency (ANR) through the GUEPARD project grant ANR10-BLANC0504-01 and from the Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS, CNRS/INSU). A.Z., D.M., R.G., R.C., and S.D. acknowledge partial support from PRIN INAF 2010 \"Planetary systems at young ages\". A.Z., D.M., A.-L.M., R.G., S.D., and R.U.C. acknowledge support from the \"Progetti Premiali\" funding scheme of the Italian Ministry of Education, University, and Research. A.Z. acknowledges support from the MillenniumvScience Initiative (Chilean Ministry of Economy), through grant \"Nucleus RC130007\". SPHERE is an instrument designed and built by a consortium consisting of IPAG (Grenoble, France), MPIA (Heidelberg, Germany), LAM (Marseille, France), LESIA (Paris, France), Laboratoire Lagrange (Nice, France), INAF Osservatorio di Padova (Italy), Observatoire de Gen\u00e8ve (Switzerland), ETH Zurich (Switzerland), NOVA (The Netherlands), ONERA (France) and ASTRON (The Netherlands), in collaboration with ESO. SPHERE was funded by ESO, with additional contributions from CNRS (France), MPIA (Germany), INAF (Italy), FINES (Switzerland) and NOVA (The Netherlands). SPHERE also received funding from the European Commission Sixth and Seventh Framework Programmes as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) under grant No. RII3-Ct-2004-001566 for FP6 (2004\u20132008), grant No. 226604 for FP7 (2009\u20132012) and grant No. 312430 for FP7 (2013\u20132016). D.H. acknowledges support from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007\u20132013 Grant Agreement No. 247060) and from the Collaborative Research Centre SFB 881 \"The Milky Way System\" (subproject A4) of the German Research Foundation (DFG).\n\nPublished - aa26906-15.pdf
Submitted - 1511.04082v1.pdf
", "abstract": "Context. The system of fourplanets discovered around the intermediate-mass star HR8799 offers a unique opportunity to test planet formation theories at large orbital radii and to probe the physics and chemistry at play in the atmospheres of self-luminous young (~30 Myr) planets. We recently obtained new photometry of the four planets and low-resolution (R ~ 30) spectra of HR8799 d and e with the SPHERE instrument (Paper III).\n\nAims. In this paper (Paper IV), we aim to use these spectra and available photometry to determine how they compare to known objects, what the planet physical properties are, and how their atmospheres work.\n\nMethods. We compare the available spectra, photometry, and spectral energy distribution (SED) of the planets to field dwarfs and young companions. In addition, we use the extinction from corundum, silicate (enstatite and forsterite), or iron grains likely to form in the atmosphere of the planets to try to better understand empirically the peculiarity of their spectrophotometric properties. To conclude, we use three sets of atmospheric models (BT-SETTL14, Cloud-AE60, Exo-REM) to determine which ingredients are critically needed in the models to represent the SED of the objects, and to constrain their atmospheric parameters (T_(eff), log\u2009g, M/H).\n\nResults. We find that HR8799d and e properties are well reproduced by those of L6-L8 dusty dwarfs discovered in the field, among which some are candidate members of young nearby associations. No known object reproduces well the properties of planets b and c. Nevertheless, we find that the spectra and WISE photometry of peculiar and/or young early-T dwarfs reddened by submicron grains made of corundum, iron, enstatite, or forsterite successfully reproduce the SED of these planets. Our analysis confirms that only the Exo-REM models with thick clouds fit (within 2\u03c3) the whole set of spectrophotometric datapoints available for HR8799 d and e for T_(eff) = 1200 K, log\u2009g in the range 3.0\u22124.5, and M/H = +0.5. The models still fail to reproduce the SED of HR8799c and b. The determination of the metallicity, log\u2009g, and cloud thickness are degenerate.\n\nConclusions. Our empirical analysis and atmospheric modelling show that an enhanced content in dust and decreased CIA of H_2 is certainly responsible for the deviation of the properties of the planet with respect to field dwarfs. The analysis suggests in addition that HR8799c and b have later spectral types than the two other planets, and therefore could both have lower masses.", "date": "2016-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "587", "publisher": "EDP Sciences", "pagerange": "Art. No. A58", "id_number": "CaltechAUTHORS:20160502-071114068", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160502-071114068", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Agence Nationale de la Recherche (ANR)", "grant_number": "ANR10-BLANC0504-01" }, { "agency": "Programmes Nationaux de Plan\u00e9tologie et de Physique Stellaire (PNP & PNPS)" }, { "agency": "Institut national des sciences de l'Univers (INSU)" }, { "agency": "Ministero dell'Istruzione, dell'Universit\u00e0 e della Ricerca (MIUR)" }, { "agency": "Millennium Science Initiative (Chilean Ministry of Economy)", "grant_number": "Nucleus RC130007" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Max Planck Institute for Astronomy (MPIA)" }, { "agency": "Istituto Nazionale di Astrofisica (INAF)" }, { "agency": "European Commission Sixth and Seventh Framework Programmes" }, { "agency": "Optical Infrared Coordination Network for Astronomy (OPTICON)", "grant_number": "RII3-Ct- 2004-001566" }, { "agency": "European Research Council (ERC)", "grant_number": "226604" }, { "agency": "European Research Council (ERC)", "grant_number": "312430 (OPTICON)" }, { "agency": "European Research Council (ERC)", "grant_number": "247060" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)", "grant_number": "SFB 881" } ] }, "doi": "10.1051/0004-6361/201526906", "primary_object": { "basename": "aa26906-15.pdf", "url": "https://authors.library.caltech.edu/records/ar5fr-30465/files/aa26906-15.pdf" }, "related_objects": [ { "basename": "1511.04082v1.pdf", "url": "https://authors.library.caltech.edu/records/ar5fr-30465/files/1511.04082v1.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Bonnefoy, M. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cp6ax-p9063", "eprint_id": 64017, "eprint_status": "archive", "datestamp": "2023-08-20 10:30:39", "lastmod": "2023-10-17 18:34:33", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martayan-C", "name": { "family": "Martayan", "given": "Christophe" } }, { "id": "Lobel-A", "name": { "family": "Lobel", "given": "Alex" } }, { "id": "Baade-D", "name": { "family": "Baade", "given": "Dietrich" } }, { "id": "Mehner-A", "name": { "family": "Mehner", "given": "Andrea" }, "orcid": "0000-0002-9564-3302" }, { "id": "Rivinius-T", "name": { "family": "Rivinius", "given": "Thomas" } }, { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "Henri M. J." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Montagnier-G", "name": { "family": "Montagnier", "given": "Guillaume" } }, { "id": "Blomme-R", "name": { "family": "Blomme", "given": "Ronny" } }, { "id": "Kervella-P", "name": { "family": "Kervella", "given": "Pierre" }, "orcid": "0000-0003-0626-1749" }, { "id": "Sana-H", "name": { "family": "Sana", "given": "Hugues" } }, { "id": "\u0160tefl-S", "name": { "family": "\u0160tefl", "given": "Stanislav" } }, { "id": "Zorec-J", "name": { "family": "Zorec", "given": "Juan" } }, { "id": "Lacour-S", "name": { "family": "Lacour", "given": "Sylvestre" }, "orcid": "0000-0002-6948-0263" }, { "id": "Le-Bouquin-J-B", "name": { "family": "Le Bouquin", "given": "Jean-Baptiste" } }, { "id": "Martins-F", "name": { "family": "Martins", "given": "Fabrice" } }, { "id": "M\u00e9rand-A", "name": { "family": "M\u00e9rand", "given": "Antoine" } }, { "id": "Patru-F", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Selman-F", "name": { "family": "Selman", "given": "Fernando" } }, { "id": "Fr\u00e9mat-Y", "name": { "family": "Fr\u00e9mat", "given": "Yves" } } ] }, "title": "Luminous blue variables: An imaging perspective on their binarity and near environment", "ispublished": "pub", "full_text_status": "public", "keywords": "stars: variables: S Doradus \u2013 stars: Wolf-Rayet \u2013 stars: imaging \u2013 binaries: general \u2013 stars: winds, outflows", "note": "\u00a9 ESO 2016. \n\nReceived 22 May 2015. Accepted 1 December 2015. \n\nWe thank the anonymous referee and the editor Dr R. Kotak for their helpful comments that allowed us to improve the manuscript. C.M.a. is grateful to ESO for the allocation of 2 months of a temporary reassignment to the science office. A.L. acknowledges financial support of the ESA-Prodex Programme administered by the Belgian Science Policy Office. C.M.a. thanks J. Taylor for providing the Reflex prototype of the VISIR dataflow. This research has made use of the Simbad and VizieR databases maintained at the CDS, Strasbourg, France, of NASA's Astrophysics Data System Bibliographic Services, and of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the US National Aeronautics and Space Administration. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This research has made use of the NASA/ IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA). This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This research has made use of the ESO archive. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. This research made use of data products from the Midcourse Space Experiment. Processing of the data was funded by the Ballistic Missile Defense Organization with additional support from NASA Office of Space Science.\n\nPublished - aa26578-15.pdf
Submitted - 1601.03542v1.pdf
", "abstract": "Luminous blue variables (LBVs) are rare massive stars with very high\nluminosity. They are characterized by strong photo-metric and spectroscopic\nvariability related to transient eruptions. The mechanisms at the origin of\nthese eruptions is not well known. In addition, their formation is still\nproblematic and the presence of a companion could help to explain how they\nform. Aims. This article presents a study of seven LBVs (about 20% of the known\nGalactic population), some Wolf-Rayet stars, and massive binaries. We probe the\nenvironments that surround these massive stars with near-, mid-, and\nfar-infrared images, investigating potential nebula/shells and the companion\nstars. Methods. To investigate large spatial scales, we used seeing-limited and\nnear diffraction-limited adaptive optics images to obtain a differential\ndiagnostic on the presence of circumstellar matter and to determine their\nextent. From those images, we also looked for the presence of binary companions\non a wide orbit. Once a companion was detected, its gravitational binding to\nthe central star was tested. Tests include the chance projection probability,\nthe proper motion estimates with multi-epoch observations, flux ratio, and star\nseparations. Results. We find that two out of seven of LBVs may have a wide\norbit companion. Most of the LBVs display a large circumstellar envelope or\nseveral shells. In particular, HD168625, known for its rings, possesses several\nshells with possibly a large cold shell at the edge of which the rings are\nformed. For the first time, we have directly imaged the companion of LBV stars.", "date": "2016-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "587", "publisher": "EDP Sciences", "pagerange": "Art. No. A115", "id_number": "CaltechAUTHORS:20160127-121514330", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160127-121514330", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Belgian Science Policy Office (BELSPO) PRODEX" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "NSF" }, { "agency": "NASA", "grant_number": "NAS5-26555" }, { "agency": "NASA", "grant_number": "NNX13AC07G" }, { "agency": "Ballistic Missile Defense Organization" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "doi": "10.1051/0004-6361/201526578", "primary_object": { "basename": "1601.03542v1.pdf", "url": "https://authors.library.caltech.edu/records/cp6ax-p9063/files/1601.03542v1.pdf" }, "related_objects": [ { "basename": "aa26578-15.pdf", "url": "https://authors.library.caltech.edu/records/cp6ax-p9063/files/aa26578-15.pdf" } ], "resource_type": "article", "pub_year": "2016", "author_list": "Martayan, Christophe; Lobel, Alex; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/fvpvp-r3p41", "eprint_id": 63727, "eprint_status": "archive", "datestamp": "2023-08-20 09:15:55", "lastmod": "2023-10-17 15:29:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" } ] }, "title": "Post-coronagraphic tip-tilt sensing for vortex phase masks: The QACITS technique", "ispublished": "pub", "full_text_status": "public", "keywords": "techniques: high angular resolution / methods: analytical / methods: numerical", "note": "\u00a9 ESO, 2015. \n\nReceived 1 August 2015 / Accepted 10 September 2015. \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - aa27102-15.pdf
", "abstract": "Context. Small inner working angle coronagraphs, such as the vortex phase mask, are essential to exploit the full potential of ground-based telescopes in the context of exoplanet detection and characterization. However, the drawback of this attractive feature is a high sensitivity to pointing errors, which degrades the performance of the coronagraph. \n\nAims. We propose a tip-tilt retrieval technique based on the analysis of the final coronagraphic image, hereafter called Quadrant Analysis of Coronagraphic Images for Tip-tilt Sensing (QACITS).\nMethods. Under the assumption of small phase aberrations, we show that the behavior of the vortex phase mask can be simply described from the entrance pupil to the Lyot stop plane with Zernike polynomials. This convenient formalism is used to establish the theoretical basis of the QACITS technique. We performed simulations to demonstrate the validity and limits of the technique, including the case of a centrally obstructed pupil. \n\nResults. The QACITS technique principle is validated with experimental results in the case of an unobstructed circular aperture, as well as simulations in presence of a central obstruction. The typical configuration of the Keck telescope (24% central obstruction) has been simulated with additional high order aberrations. In these conditions, our simulations show that the QACITS technique is still adapted to centrally obstructed pupils and performs tip-tilt retrieval with a precision of 5 \u00d7 10-2\u03bb/D when wavefront errors amount to \u03bb/ 14\u2009rms and 10-2\u03bb/D for \u03bb/ 70\u2009rms errors (with \u03bb the wavelength and D the pupil diameter). \n\nConclusions. We have developed and demonstrated a tip-tilt sensing technique for vortex coronagraphs. The implementation of the QACITS technique is based on the analysis of the scientific image and does not require any modification of the original setup. Current facilities equipped with a vortex phase mask can thus directly benefit from this technique to improve the contrast performance close to the axis.", "date": "2015-12", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "584", "publisher": "EDP Sciences", "pagerange": "Art. No. A74", "id_number": "CaltechAUTHORS:20160115-155025124", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160115-155025124", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "doi": "10.1051/0004-6361/201527102", "primary_object": { "basename": "aa27102-15.pdf", "url": "https://authors.library.caltech.edu/records/fvpvp-r3p41/files/aa27102-15.pdf" }, "resource_type": "article", "pub_year": "2015", "author_list": "Huby, E.; Baudoz, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hgn5f-xc764", "eprint_id": 63076, "eprint_status": "archive", "datestamp": "2023-08-20 08:54:15", "lastmod": "2023-10-25 23:29:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G. J." }, "orcid": "0000-0003-4769-1665" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "B." } }, { "id": "Swartzlander-G-A", "name": { "family": "Swartzlander", "given": "G. A." } } ] }, "title": "Lyot-plane phase masks for improved high-contrast imaging with a vortex coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution / planets and satellites: detection", "note": "\u00a9 ESO, 2015. \n\nReceived 19 May 2015 / Accepted 18 September 2015 / Published online 30 October 2015. \n\nThis work has benefited from fruitful discussions with Prof. Jean Surdej (Universit\u00e9 de Li\u00e8ge, Belgium) and Prof. Matt Kenworthy (Leiden Observatory, Netherlands) as well as computing assistance from Carlos Gomez Gonzalez (Universit\u00e9 de Li\u00e8ge, Belgium). G.J.R. was supported by Wallonie-Bruxelles International's (Belgium) Scholarship for Excellence and the US National Science Foundation under Grant No. ECCS-1309517. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - aa26561-15.pdf
", "abstract": "Context. The vortex coronagraph is an optical instrument that precisely removes on-axis starlight allowing for high contrast imaging at small angular separation from the star, a crucial capability for direct detection and characterization of exoplanets and circumstellar disks. Telescopes with aperture obstructions, such as secondary mirrors and spider support structures, require advanced coronagraph designs to provide adequate starlight suppression. \n\nAims. We introduce a phase-only Lyot-plane optic to the vortex coronagraph, which offers improved contrast performance on telescopes with complicated apertures. Potential solutions for the European Extremely Large Telescope (E-ELT) are described. \n\nMethods. Adding a Lyot-plane phase mask relocates residual starlight away from a region of the image plane, thereby reducing stellar noise and improving sensitivity to off-axis companions. The phase mask is calculated using an iterative phase retrieval algorithm. \n\nResults. Numerically, we achieve a contrast on the order of 10-6 for a companion with angular displacement as small as 4\u03bb/D with an E-ELT type aperture. Even in the presence of aberrations, improved performance is expected compared to either a conventional vortex coronagraph or an optimized pupil plane phase element alone.", "date": "2015-11", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "583", "publisher": "EDP Sciences", "pagerange": "Art. No. A81", "id_number": "CaltechAUTHORS:20151218-115212953", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151218-115212953", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Wallonie-Bruxelles International" }, { "agency": "NSF", "grant_number": "ECCS-1309517" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "Actions de Recherche Concertees (Communaut\u00e9 Fran\u00e7aise de Belgique)" } ] }, "doi": "10.1051/0004-6361/201526561", "primary_object": { "basename": "aa26561-15.pdf", "url": "https://authors.library.caltech.edu/records/hgn5f-xc764/files/aa26561-15.pdf" }, "resource_type": "article", "pub_year": "2015", "author_list": "Ruane, G. J.; Huby, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/r8hh2-zqt66", "eprint_id": 61252, "eprint_status": "archive", "datestamp": "2023-08-22 16:38:40", "lastmod": "2023-10-25 14:39:36", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Fast-moving features in the debris disk around AU Microscopii", "ispublished": "pub", "full_text_status": "public", "keywords": "Exoplanets; Stars", "note": "\u00a9 2015 Macmillan Publishers Limited. \n\nReceived 23 January 2015; Accepted 28 August 2015; Published online 07 October 2015. \n\nSPHERE was built by a European consortium led by IPAG (France). SPHERE was funded by the ESO, with additional contributions from CNRS, MPIA, INAF, FINES and NOVA. SPHERE also received funding from the European Commission FP6 and FP7 programmes as part of OPTICON under grant numbers RII3-Ct-2004-001566 (FP6), 226604 (FP7) and 312430 (FP7). French co-authors are supported by ANR-14-CE33-0018. Part of this work has been carried out within the framework of the National Centre for Competence in Research PlanetS supported by the Swiss National Science Foundation. C.T. and M.R.M. acknowledge the financial support of the SNSF.This study is based on observations from program 60.A-9249(C) at ESO Very Large Telescope and from program number 12228 made with the NASA/ESA Hubble Space Telescope, obtained at STScI, which is operated by AURA Inc. under NASA contract NAS 5-26555. We are also grateful to the ESO for releasing the commissioning data for publication. Finally, we thank P. Zarka, N. Meyer-Vernet, B. Stelzer and Q. Kral for discussions. J.S. is a NASA Postdoctoral Program Fellow. \n\nAuthor Contributions: A.B. reduced and analysed IRDIS data and wrote the paper. C.T. reduced the IRDIS and ZIMPOL data and contributed to the manuscript writing. A.B., C.T., A.-M.L., M.J., J.-C.A., G.S., C.G., J.D., D.M., T.H., C.D., C.G., J.O. and J.S. worked on the interpretation of the results. G.S., C.G., J.D., D.H., T.R. and J.W. re-reduced HST data. J.M., M.L., D. Mouillet., D. Mawet, J.H.G. and Z.W. operated the instrument at the telescope. A.-L.M. worked on the astrometric calibration. A.B., A.-M.L, M.L., D. Mouillet, T.H., J.-L.B., K.D., M.F., T.F., M.K., F.M., M.M., C.M., J.-F.S, H.M.S, M.T., S.U, F.V. and A.V. contributed to the instrument conception. All authors commented on the manuscript. \n\nThe authors declare no competing financial interests.\n\nSupplemental Material - nature15705-sf1.jpg
Supplemental Material - nature15705-sf2.jpg
Supplemental Material - nature15705-sf3.jpg
Supplemental Material - nature15705-sf4.jpg
Supplemental Material - nature15705-sf5.jpg
Supplemental Material - nature15705-st1.jpg
", "abstract": "In the 1980s, excess infrared emission was discovered around main-sequence stars; subsequent direct-imaging observations revealed orbiting disks of cold dust to be the source. These 'debris disks' were thought to be by-products of planet formation because they often exhibited morphological and brightness asymmetries that may result from gravitational perturbation by planets. This was proved to be true for the \u03b2 Pictoris system, in which the known planet generates an observable warp in the disk. The nearby, young, unusually active late-type star AU Microscopii hosts a well-studied edge-on debris disk; earlier observations in the visible and near-infrared found asymmetric localized structures in the form of intensity variations along the midplane of the disk beyond a distance of 20 astronomical units. Here we report high-contrast imaging that reveals a series of five large-scale features in the southeast side of the disk, at projected separations of 10\u201360 astronomical units, persisting over intervals of 1\u20134 years. All these features appear to move away from the star at projected speeds of 4\u201310 kilometres per second, suggesting highly eccentric or unbound trajectories if they are associated with physical entities. The origin, localization, morphology and rapid evolution of these features are difficult to reconcile with current theories.", "date": "2015-10-08", "date_type": "published", "publication": "Nature", "volume": "526", "number": "7572", "publisher": "Nature Publishing Group", "pagerange": "230-232", "id_number": "CaltechAUTHORS:20151019-102702615", "issn": "0028-0836", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151019-102702615", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "European Research Council (ERC)", "grant_number": "RII3-Ct-2004-001566" }, { "agency": "European Research Council (ERC)", "grant_number": "226604" }, { "agency": "European Research Council (ERC)", "grant_number": "312430" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR-14-CE33-0018" }, { "agency": "Swiss National Science Foundation (SNSF)" }, { "agency": "NASA", "grant_number": "NAS 5-26555" }, { "agency": "NASA Postdoctoral Program" } ] }, "doi": "10.1038/nature15705", "primary_object": { "basename": "nature15705-sf4.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-sf4.jpg" }, "related_objects": [ { "basename": "nature15705-sf5.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-sf5.jpg" }, { "basename": "nature15705-st1.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-st1.jpg" }, { "basename": "OAwaiver-DMawet.pdf", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/OAwaiver-DMawet.pdf" }, { "basename": "nature15705-sf1.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-sf1.jpg" }, { "basename": "nature15705-sf2.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-sf2.jpg" }, { "basename": "nature15705-sf3.jpg", "url": "https://authors.library.caltech.edu/records/r8hh2-zqt66/files/nature15705-sf3.jpg" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Boccaletti, Anthony and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hrd19-ca290", "eprint_id": 60879, "eprint_status": "archive", "datestamp": "2023-08-20 08:32:58", "lastmod": "2023-10-24 22:05:51", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Eyeing up a Jupiter-like exoplanet", "ispublished": "pub", "full_text_status": "restricted", "note": "\u00a9 2015 American Association for the Advancement of Science.", "abstract": "With thousands of exoplanets having been discovered over the past 20 years, the solar system is recognized as presenting just one example among a mind-boggling variety of system architectures: from circumbinary exoplanets (1), systems with tightly packed inner planets (2), water-worlds (3), potential Earth twins (4), super-Earths (5), sub- and super-Neptunes (6), evaporating comet-like planets (7), giant rings (8), and hazy hot Jupiters all the way to extremely long-period lonely massive objects looking more like failed stars than giant planets. So far, the vast majority of these planetary systems have been discovered indirectly by techniques looking at tiny variations in their host star's motion and/or brightness. These techniques have limited remote-sensing capabilities, yet have ushered in an entirely new branch of astrophysics called comparative exoplanetology, putting the solar system and its planets into a universal perspective. On page 64 of this issue, Macintosh et al. (9) present the discovery of a young giant exoplanet with the Gemini Planet Imager (GPI) and a technique called high-contrast imaging. Beyond taking striking pictures (see the figure), the technique promises to yield the most detailed measurements of whole distant planetary systems, including spectroscopy of planet atmospheres and time-resolved astrometry of their orbital motion.", "date": "2015-10-02", "date_type": "published", "publication": "Science", "volume": "350", "number": "6256", "publisher": "American Association for the Advancement of Science", "pagerange": "39-40", "id_number": "CaltechAUTHORS:20151007-160534220", "issn": "0036-8075", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151007-160534220", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1126/science.aad0904", "resource_type": "article", "pub_year": "2015", "author_list": "Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0f5wh-1xs13", "eprint_id": 62241, "eprint_status": "archive", "datestamp": "2023-08-20 08:31:31", "lastmod": "2023-10-25 16:59:41", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "David-T-J", "name": { "family": "David", "given": "T." }, "orcid": "0000-0001-6534-6246" }, { "id": "Bottom-M", "name": { "family": "Bottom", "given": "M." }, "orcid": "0000-0003-1341-5531" }, { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "S." }, "orcid": "0000-0001-8074-2562" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Padgett-D-L", "name": { "family": "Padgett", "given": "D." }, "orcid": "0000-0001-5334-5107" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Morales-F-Y", "name": { "family": "Morales", "given": "F. Y." }, "orcid": "0000-0001-9414-3851" }, { "id": "K\u00fchn-J", "name": { "family": "K\u00fchn", "given": "J." }, "orcid": "0000-0002-6344-4835" } ] }, "title": "Discovery of a Low-mass Companion Around HR 3549", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 stars: imaging \u2013 stars: low-mass", "note": "\u00a9 2015 The American Astronomical Society. \n\nReceived 2015 July 1; accepted 2015 August 21; published 2015 September 28. \n\nThe first author is grateful to Prof. Lynne Hillenbrand (Caltech) and Ben Zuckerman (UCLA) for their advice and comments. T.J.D is supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE1144469. M.B. is supported by a NASA Space Technology Research fellowship, grant No. NNX13AN42H. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. \n\nFacility: Very Large Telescope.\n\nPublished - Mawet_2015p103.pdf
Submitted - 1509.05689.pdf
", "abstract": "We report the discovery of a low-mass companion to HR 3549, an A0V star surrounded by a debris disk with a warm excess detected by WISE at 22 \u03bcm (10\u03c3 significance). We imaged HR 3549 B in the L band with NAOS-CONICA, the adaptive optics infrared camera of the Very Large Telescope, in January 2013 and confirmed its common proper motion in 2015 January. The companion is at a projected separation of \u224380 AU and position angle of \u2243157\u00b0, so it is orbiting well beyond the warm disk inner edge of r > 10 AU. Our age estimate for this system corresponds to a companion mass in the range 15\u201380 M_J, spanning the brown dwarf regime, and so HR 3549 B is another recent addition to the growing list of brown dwarf desert objects with extreme mass ratios. The simultaneous presence of a warm disk and a brown dwarf around HR 3549 provides interesting empirical constraints on models of the formation of substellar companions.", "date": "2015-10-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "811", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 103", "id_number": "CaltechAUTHORS:20151119-125957783", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151119-125957783", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1144469" }, { "agency": "NASA Space Technology Research Fellowship", "grant_number": "NNX13AN42H" }, { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/0004-637X/811/2/103", "primary_object": { "basename": "1509.05689.pdf", "url": "https://authors.library.caltech.edu/records/0f5wh-1xs13/files/1509.05689.pdf" }, "related_objects": [ { "basename": "Mawet_2015p103.pdf", "url": "https://authors.library.caltech.edu/records/0f5wh-1xs13/files/Mawet_2015p103.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Mawet, D.; David, T.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/a3ghj-thf48", "eprint_id": 71214, "eprint_status": "archive", "datestamp": "2023-08-20 08:28:23", "lastmod": "2023-10-23 15:29:57", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cook-T", "name": { "family": "Cook", "given": "Timothy" } }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri" } }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } }, { "id": "Douglas-E", "name": { "family": "Douglas", "given": "Ewan" } }, { "id": "Finn-S-C", "name": { "family": "Finn", "given": "Susanna C." } }, { "id": "Kuchner-M", "name": { "family": "Kuchner", "given": "Marc" } }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole K." }, "orcid": "0000-0002-8507-1304" }, { "id": "Marinan-A-D", "name": { "family": "Marinan", "given": "Anne" } }, { "id": "Martel-J", "name": { "family": "Martel", "given": "Jason" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mazin-B-A", "name": { "family": "Mazin", "given": "Benjamin" } }, { "id": "Meeker-S-R", "name": { "family": "Meeker", "given": "Seth R." } }, { "id": "Mendillo-C", "name": { "family": "Mendillo", "given": "Christopher" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Gene" } }, { "id": "Stuchlik-D", "name": { "family": "Stuchlik", "given": "David" } }, { "id": "Swain-M", "name": { "family": "Swain", "given": "Mark" } } ] }, "title": "Planetary Imaging Concept Testbed Using a Recoverable Experiment\u2013Coronagraph (PICTURE C)", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2015 The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. [DOI: 10.1117/1.JATIS.1.4.044001] \n\nReceived May 1, 2015; Accepted August 11, 2015; published online Sep. 11, 2015. \n\nThe authors would like to thank Ron Polidan and the other members of NGAS/AOA Xinetics for their dedicated assistance with this project. This work was supported by NASA grant NNX14AH46G, NNX15AG23G, NNX13AD50G and UML internal funds.\n\nPublished - JATIS_1_4_044001.pdf
", "abstract": "An exoplanet mission based on a high-altitude balloon is a next logical step in humanity's quest to explore Earthlike planets in Earthlike orbits orbiting Sunlike stars. The mission described here is capable of spectrally imaging debris disks and exozodiacal light around a number of stars spanning a range of infrared excesses, stellar types, and ages. The mission is designed to characterize the background near those stars, to study the disks themselves, and to look for planets in those systems. The background light scattered and emitted from the disk is a key uncertainty in the mission design of any exoplanet direct imaging mission, thus, its characterization is critically important for future imaging of exoplanets.", "date": "2015-10", "date_type": "published", "publication": "Journal of Astronomical Telescopes, Instruments, and Systems", "volume": "1", "number": "4", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "pagerange": "Art. No. 044001", "id_number": "CaltechAUTHORS:20161018-095552337", "issn": "2329-4124", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161018-095552337", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX14AH46G" }, { "agency": "NASA", "grant_number": "NNX15AG23G" }, { "agency": "NASA", "grant_number": "NNX13AD50G" }, { "agency": "University of Massachusetts Lowell" } ] }, "doi": "10.1117/1.JATIS.1.4.044001", "primary_object": { "basename": "JATIS_1_4_044001.pdf", "url": "https://authors.library.caltech.edu/records/a3ghj-thf48/files/JATIS_1_4_044001.pdf" }, "resource_type": "article", "pub_year": "2015", "author_list": "Cook, Timothy; Cahoy, Kerri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6999f-qt772", "eprint_id": 63338, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:32", "lastmod": "2024-01-13 16:30:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mazoyer-J", "name": { "family": "Mazoyer", "given": "Johan" }, "orcid": "0000-0002-9133-3091" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Norman-C", "name": { "family": "Norman", "given": "Colin" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } } ] }, "title": "Active correction of aperture discontinuities (ACAD) for space telescope pupils: a parametic analysis", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation, WFIRST-AFTA, High-contrast imaging, adaptive optics, wave-front error correction, deformable mirror", "note": "\u00a9 2015 SPIE. \n\nThis material is based upon work carried out under subcontract #1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 96050M.pdf
", "abstract": "As the performance of coronagraphs improves, the achievable contrast is more and more dependent of the shape of the pupil. The future generation of space and ground based coronagraphic instruments will have to achieve high contrast levels on on-axis and/or segmented telescopes. To correct for the high amplitude aberrations introduced by secondary mirror structures and segmentation of the primary mirror, we explore a two deformable mirror (DM) method. The major difficulty of several DM methods is the non-linear relation linking actuator strokes to the point spread function in the coronagraph focal plane. The Active Compensation of Aperture Discontinuities (ACAD) method is achieving this minimization by solving a non linear differential Monge Ampere equation. Once this open loop method have reached the minimum, a close-loop stroke minimization method can be applied to correct for phase and amplitude aberrations to achieve the ultimate contrast. In this paper, I describe the results of the parametric analysis that that I have undertaken on this method. After recalling the principle of the method, I will described the explored parameter space (deformable mirror set-up, shape of the pupil, bandwidth, coronagraph designs). I will precisely described the way I simulated the Vortex coronagraph for this numerical simulation. Finally I will present the preliminary results of this parametric analysis for space telescope pupils only.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "id_number": "CaltechAUTHORS:20160104-135253801", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-135253801", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2188692", "primary_object": { "basename": "96050M.pdf", "url": "https://authors.library.caltech.edu/records/6999f-qt772/files/96050M.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Mazoyer, Johan; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2qsqj-cpy75", "eprint_id": 87176, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:46", "lastmod": "2024-01-14 20:15:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Douglas-E-S", "name": { "family": "Douglas", "given": "Ewan S." } }, { "id": "Hewawasam-K", "name": { "family": "Hewawasam", "given": "Kuravi" } }, { "id": "Mendillo-C-B", "name": { "family": "Mendillo", "given": "Christopher B." } }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri L." } }, { "id": "Cook-T-A", "name": { "family": "Cook", "given": "Timothy A." } }, { "id": "Finn-S-C", "name": { "family": "Finn", "given": "Susanna C." } }, { "id": "Howe-G-A", "name": { "family": "Howe", "given": "Glenn A." } }, { "id": "Kuchner-M-J", "name": { "family": "Kuchner", "given": "Marc J." }, "orcid": "0000-0002-2387-5489" }, { "id": "Lewis-N-K", "name": { "family": "Lewis", "given": "Nikole K." }, "orcid": "0000-0002-8507-1304" }, { "id": "Marinan-A-D", "name": { "family": "Marinan", "given": "Anne D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } } ] }, "title": "End-to-end simulation of high-contrast imaging systems: methods and results for the PICTURE mission family", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2015 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was funded by NASA grants NNG05WC17G, NNX11AD53G, and NNX15AG23G and through graduate fellowships awarded to E.S. Douglas by the Massachusetts Space Grant Consortium. Special thanks to Brian Hicks for many helpful conversations. Measurements of telescope mirror reflectivities provided by ISP Optics and typical reflectivities provided by Thorlabs. This research made use of Astropy, a community-developed core Python package for Astronomy; the IPython Interactive Computing architecture; IDL (Exelis Visual Information Solutions, Boulder, Colorado); and the SIMBAD database, operated at CDS, Strasbourg, France.\n\nPublished - 96051A.pdf
", "abstract": "We describe a set of numerical approaches to modeling the performance of space flight high-contrast imaging payloads. Mission design for high-contrast imaging requires numerical wavefront error propagation to ensure accurate component specifications. For constructed instruments, wavelength and angle-dependent throughput and contrast models allow detailed simulations of science observations, allowing mission planners to select the most productive science targets. The PICTURE family of missions seek to quantify the optical brightness of scattered light from extrasolar debris disks via several high-contrast imaging techniques: sounding rocket (the Planet Imaging Concept Testbed Using a Rocket Experiment) and balloon flights of a visible nulling coronagraph, as well as a balloon flight of a vector vortex coronagraph (the Planetary Imaging Concept Testbed Using a Recoverable Experiment - Coronagraph, PICTURE-C). The rocket mission employs an on-axis 0.5m Gregorian telescope, while the balloon flights will share an unobstructed off-axis 0.6m Gregorian. This work details the flexible approach to polychromatic, end-to-end physical optics simulations used for both the balloon vector vortex coronagraph and rocket visible nulling coronagraph missions. We show the preliminary PICTURE-C telescope and vector vortex coronagraph design will achieve 10^(-8) contrast without post-processing as limited by realistic optics, but not considering polarization or low-order errors. Simulated science observations of the predicted warm ring around Epsilon Eridani illustrate the performance of both missions.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051A", "id_number": "CaltechAUTHORS:20180615-162745810", "isbn": "9781628417715", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-162745810", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNG05WC17G" }, { "agency": "NASA", "grant_number": "NNX11AD53G" }, { "agency": "NASA", "grant_number": "NNX15AG23G" }, { "agency": "Massachusetts Space Grant Consortium" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2187262", "primary_object": { "basename": "96051A.pdf", "url": "https://authors.library.caltech.edu/records/2qsqj-cpy75/files/96051A.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Douglas, Ewan S.; Hewawasam, Kuravi; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ypmvp-5qa79", "eprint_id": 63336, "eprint_status": "archive", "datestamp": "2023-08-20 08:13:27", "lastmod": "2024-01-13 16:30:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Mendillo-C-B", "name": { "family": "Mendillo", "given": "Christopher B." } }, { "id": "Brown-J-M", "name": { "family": "Brown", "given": "Joshua" } }, { "id": "Martel-J", "name": { "family": "Martel", "given": "Jason" } }, { "id": "Howe-G-A", "name": { "family": "Howe", "given": "Glenn A." } }, { "id": "Hewasawan-K", "name": { "family": "Hewasawam", "given": "Kuravi" } }, { "id": "Finn-S-C", "name": { "family": "Finn", "given": "Susanna C." } }, { "id": "Cook-T-A", "name": { "family": "Cook", "given": "Timothy A." } }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } }, { "id": "Douglas-E-S", "name": { "family": "Douglas", "given": "Ewan S." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Singh-G", "name": { "family": "Singh", "given": "Garima" } }, { "id": "Lozi-J", "name": { "family": "Lozi", "given": "Julien" }, "orcid": "0000-0002-3047-1845" }, { "id": "Cahoy-K-L", "name": { "family": "Cahoy", "given": "Kerri L." } }, { "id": "Marinan-A-D", "name": { "family": "Marinan", "given": "Anne D." } } ] }, "title": "The low-order wavefront sensor for the PICTURE-C mission", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanets, exozodiacal dust, debris disks, balloon, direct imaging, fine pointing, wavefront control, high-contrast imaging", "note": "\u00a9 2015 SPIE. \n\nThis work was funded under NASA grant NNX15AG23G S01. Thanks to Jim Lanzi and David Stuchlik at WFF for providing the WASP test flight 2 data.\n\nPublished - 960519.pdf
", "abstract": "The PICTURE-C mission will fly a 60 cm off-axis unobscured telescope and two high-contrast coronagraphs in successive high-altitude balloon flights with the goal of directly imaging and spectrally characterizing visible scattered light from exozodiacal dust in the interior 1-10 AU of nearby exoplanetary systems. The first flight in 2017 will use a 10^(-4) visible nulling coronagraph (previously flown on the PICTURE sounding rocket) and the second flight in 2019 will use a 10^(-7) vector vortex coronagraph. A low-order wavefront corrector (LOWC) will be used in both flights to remove time-varying aberrations from the coronagraph wavefront. The LOWC actuator is a 76-channel high-stroke deformable mirror packaged on top of a tip-tilt stage. This paper will detail the selection of a complementary high-speed, low-order wavefront sensor (LOWFS) for the mission. The relative performance and feasibility of several LOWFS designs will be compared including the Shack-Hartmann, Lyot LOWFS, and the curvature sensor. To test the different sensors, a model of the time-varying wavefront is constructed using measured pointing data and inertial dynamics models to simulate optical alignment perturbations and surface deformation in the balloon environment.", "date": "2015-09-16", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 960519", "id_number": "CaltechAUTHORS:20160104-133428051", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-133428051", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX15AG23G S01" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "S." } } ] }, "doi": "10.1117/12.2188238", "primary_object": { "basename": "960519.pdf", "url": "https://authors.library.caltech.edu/records/ypmvp-5qa79/files/960519.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Shaklan, Stuart; Mendillo, Christopher B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sk15e-4jy61", "eprint_id": 63364, "eprint_status": "archive", "datestamp": "2023-08-20 08:11:31", "lastmod": "2024-01-13 16:31:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "P." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "G." }, "orcid": "0000-0003-4769-1665" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "A Mach-Zehnder interferometer based on orbital angular momentum for improved vortex coronagraph efficiency", "ispublished": "unpub", "full_text_status": "public", "keywords": "Orbital angular momentum, Coronagraphy, Interferometry, Birefringence, Polarization", "note": "\u00a9 2015 SPIE. \n\nThis work and the author are funded thanks to a European Research Council funding under the European Union's Seventh Framework Program (ERC Grant Agreement n\u25e6337569).\n\nPublished - 96051J.pdf
Submitted - 1605.08033v1.pdf
", "abstract": "The Annular Groove Phase Mask (AGPM) is a vectorial vortex phase mask. It acts as a half-wave plate with a radial fast axis orientation operating in the mid infrared domain. When placed at the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by a down-stream pupil stop, while the off axis sources are not affected. However due to experimental conditions the nulling is hardly perfect. To improve the null, a Mach-Zehnder interferometer containing Dove prisms differently oriented can be proposed to sort out light based on its orbital angular momentum (OAM). Thanks to the differential rotation of the beam, a \u03c0 phase shift is achieved for the on axis light affected by a non zero OAM. Therefore the contrast between the star and its faint companion is enhanced. Nevertheless, due the Dove prisms birefringence, the performance of the interferometer is relatively poor. To solve this problem, we propose to add a birefringent wave-plate in each arm to compensate this birefringence. In this paper, we will develop the mathematical model of the wave front using the Jones formalism. The performance of the interferometer is at first computed for the simple version without the birefringent plate. Then the effect of the birefringent plate is be mathematically described and the performance is re-computed.", "date": "2015-09-11", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051J", "id_number": "CaltechAUTHORS:20160105-070458470", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160105-070458470", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2189329", "primary_object": { "basename": "96051J.pdf", "url": "https://authors.library.caltech.edu/records/sk15e-4jy61/files/96051J.pdf" }, "related_objects": [ { "basename": "1605.08033v1.pdf", "url": "https://authors.library.caltech.edu/records/sk15e-4jy61/files/1605.08033v1.pdf" } ], "resource_type": "book_section", "pub_year": "2015", "author_list": "Piron, P.; Delacroix, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/t4xk9-wgz48", "eprint_id": 63347, "eprint_status": "archive", "datestamp": "2023-08-20 08:11:24", "lastmod": "2024-01-13 16:30:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ruane-G-J", "name": { "family": "Ruane", "given": "Garreth J." }, "orcid": "0000-0003-4769-1665" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Swartzlander-G-A", "name": { "family": "Swartzlander", "given": "Grover A." } } ] }, "title": "Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs", "note": "\u00a9 2015 SPIE. \n\nThis work has benefited from computing assistance from Carlos Gomez Gonzalez (Universit\u00e9 de Li\u00e8ge, Belgium) as well as fruitful discussions with Prof. Jean Surdej (Universit\u00e9 de Li\u00e8ge, Belgium) and Prof. Matt Kenworthy (Leiden Observatory, Netherlands). G. J. Ruane was supported by Wallonie-Bruxelles International's (Belgium) Scholarship for Excellence and the U.S. National Science Foundation under Grant No. ECCS-1309517. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.\n\nPublished - 96051I.pdf
", "abstract": "We present methods for optimizing pupil and focal plane optical elements that improve the performance of vortex coronagraphs on telescopes with obstructed or segmented apertures. Phase-only and complex masks are designed for the entrance pupil, focal plane, and the plane of the Lyot stop. Optimal masks are obtained using both analytical and numerical methods. The latter makes use of an iterative error reduction algorithm to calculate \"correcting\" optics that mitigate unwanted diffraction from aperture obstructions. We analyze the achieved performance in terms of starlight suppression, contrast, off-axis image quality, and chromatic dependence. Manufacturing considerations and sensitivity to aberrations are also discussed. This work provides a path to joint optimization of multiple coronagraph planes to maximize sensitivity to exoplanets and other faint companions.", "date": "2015-09-11", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 96051I", "id_number": "CaltechAUTHORS:20160104-151248079", "isbn": "978-1-62841-771-5", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VII", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160104-151248079", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Wallonie-Bruxelles International's Scholarship for Excellence" }, { "agency": "NSF", "grant_number": "ECCS-1309517" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Shaklan-S", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2187236", "primary_object": { "basename": "96051I.pdf", "url": "https://authors.library.caltech.edu/records/t4xk9-wgz48/files/96051I.pdf" }, "resource_type": "book_section", "pub_year": "2015", "author_list": "Ruane, Garreth J.; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cgd9r-mpj51", "eprint_id": 57655, "eprint_status": "archive", "datestamp": "2023-08-20 07:55:41", "lastmod": "2023-10-23 17:36:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" }, { "id": "Cieza-L-A", "name": { "family": "Cieza", "given": "Lucas A." }, "orcid": "0000-0002-2828-1153" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Yang-Bin", "name": { "family": "Yang", "given": "Bin" } }, { "id": "Canovas-H", "name": { "family": "Canovas", "given": "Hector" }, "orcid": "0000-0001-7668-8022" }, { "id": "De-Boer-J", "name": { "family": "De Boer", "given": "Jozua" } }, { "id": "Casassus-S", "name": { "family": "Casassus", "given": "Simon" } }, { "id": "M\u00e9nard-F", "name": { "family": "M\u00e9nard", "given": "Fran\u00e7ois" } }, { "id": "Schreiber-M-R", "name": { "family": "Schreiber", "given": "Matthias R." } }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Biller-B-A", "name": { "family": "Biller", "given": "Beth A." }, "orcid": "0000-0003-4614-7035" }, { "id": "Nielsen-E-L", "name": { "family": "Nielsen", "given": "Eric L." }, "orcid": "0000-0001-6975-9056" }, { "id": "Hayward-T-L", "name": { "family": "Hayward", "given": "Thomas L." } } ] }, "title": "Improving signal-to-noise in the direct imaging of exoplanets and circumstellar disks with MLOCI", "ispublished": "pub", "full_text_status": "public", "keywords": "planets and satellites: detection \u2013 instrumentation: adaptive optics \u2013 methods: data analysis \u2013 techniques: image processing", "note": "\u00a9 2015 ESO. Article published by EDP Sciences.\n\nReceived 6 February 2015; Accepted 14 May 2015; Published online 26 August 2015.\n\n\nBased on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (USA), the Science and Technology Facilities Council (UK), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Minist\u00e9rio da Ci\u00eancia e Tecnologia (Brazil) and Ministerio de Ciencia, Tecnolog\u00eda e Innovaci\u00f3n Productiva (Argentina).\n\nOur research has employed the 2MASS data products; NASA's Astrophysical Data System; the SIMBAD database operated at the CDS, Strasbourg, France. L.A.C. was supported by ALMA-CONICYT grant number 31120009 and CONICYT-FONDECYT grant number 1140109. L.A.C., M.R.S., H.C., and S.C. acknowledge support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant Nucleus RC13007. H.C. also thanks ALMA/CONICYT (grants 31100025 and 31130027) for their support.\n\nPublished - aa25837-15.pdf
Submitted - 1502.03092v1.pdf
", "abstract": "We present a new algorithm designed to improve the signal-to-noise ratio (S/N) of point and extended source detections around bright stars in direct imaging data.One of our innovations is that we insert simulated point sources into the science images, which we then try to recover with maximum S/N. This improves the S/N of real point sources elsewhere in the field. The algorithm, based on the locally optimized combination of images (LOCI) method, is called Matched LOCI or MLOCI. We show with Gemini Planet Imager (GPI) data on HD 135344 B and Near-Infrared Coronagraphic Imager (NICI) data on several stars that the new algorithm can improve the S/N of point source detections by 30\u2013400% over past methods. We also find no increase in false detections rates. No prior knowledge of candidate companion locations is required to use MLOCI. On the other hand, while non-blind applications may yield linear combinations of science images that seem to increase the S/N of true sources by a factor >2, they can also yield false detections at high rates. This is a potential pitfall when trying to confirm marginal detections or to redetect point sources found in previous epochs. These findings are relevant to any method where the coefficients of the linear combination are considered tunable, e.g., LOCI and principal component analysis (PCA). Thus we recommend that false detection rates be analyzed when using these techniques.", "date": "2015-09", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "581", "publisher": "EDP Sciences", "pagerange": "Art. No. A24", "id_number": "CaltechAUTHORS:20150519-105102626", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-105102626", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "31120009" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "1140109" }, { "agency": "Ministry of Economy (Chile)", "grant_number": "RC13007" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "31100025" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "31130027" } ] }, "doi": "10.1051/0004-6361/201525837", "primary_object": { "basename": "aa25837-15.pdf", "url": "https://authors.library.caltech.edu/records/cgd9r-mpj51/files/aa25837-15.pdf" }, "related_objects": [ { "basename": "1502.03092v1.pdf", "url": "https://authors.library.caltech.edu/records/cgd9r-mpj51/files/1502.03092v1.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Wahhaj, Zahed; Cieza, Lucas A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mxe2z-8eq04", "eprint_id": 61238, "eprint_status": "archive", "datestamp": "2023-08-20 07:43:35", "lastmod": "2023-10-25 14:38:53", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bottom-M", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "K\u00fchn-J-G", "name": { "family": "Kuhn", "given": "Jonas" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "Jean C." }, "orcid": "0000-0001-8982-1654" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Resolving the Delta Andromedae Spectroscopic Binary with Direct Imaging", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: spectroscopic \u2013 instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 stars: imaging", "note": "\u00a9 2015 The American Astronomical Society. \n\nReceived 2015 April 23; accepted 2015 June 23; published 2015 August 4. \n\nWe are pleased to acknowledge the Palomar Observatory staff for their excellent support, particularly Steve Kunsman. We greatly benefited from the expert assistance of Rick Burruss (JPL) with the adaptive optics system. We thank the referee for a useful review, particularly for pointing out some discrepancies in our analysis and previous work, which improved the paper. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). M.B. is supported by a NASA Space Technology Research Fellowship, grant NNX13AN42H.\n\nPublished - Bottom_2015.pdf
Submitted - 1506.07517v1.pdf
", "abstract": "We present a direct image of the innermost companion to the red giant \u03b4 Andromedae using the Stellar Double Coronagraph at the Palomar Observatory. We use a Markov Chain Monte Carlo based algorithm to simultaneously reduce the data and perform astrometry and photometry of the companion. We determine that the companion is most likely a main sequence K-type star and is certainly not the previously hypothesized white dwarf.", "date": "2015-08-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "809", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 11", "id_number": "CaltechAUTHORS:20151016-155237644", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151016-155237644", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "NNX13AN42H" } ] }, "doi": "10.1088/0004-637X/809/1/11", "primary_object": { "basename": "1506.07517v1.pdf", "url": "https://authors.library.caltech.edu/records/mxe2z-8eq04/files/1506.07517v1.pdf" }, "related_objects": [ { "basename": "Bottom_2015.pdf", "url": "https://authors.library.caltech.edu/records/mxe2z-8eq04/files/Bottom_2015.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Bottom, Michael; Kuhn, Jonas; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/enp1k-ssv74", "eprint_id": 57646, "eprint_status": "archive", "datestamp": "2023-08-20 06:26:41", "lastmod": "2023-10-23 17:36:05", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hu\u00e9lamo-N", "name": { "family": "Hu\u00e9lamo", "given": "N." }, "orcid": "0000-0002-2711-8143" }, { "id": "Ivanov-V-D", "name": { "family": "Ivanov", "given": "V. D." } }, { "id": "Kurtev-R", "name": { "family": "Kurtev", "given": "R." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Borissova-J", "name": { "family": "Borissova", "given": "J." }, "orcid": "0000-0002-5936-7718" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mu\u017eic-K", "name": { "family": "Mu\u017eic", "given": "K." } }, { "id": "C\u00e1ceres-C", "name": { "family": "C\u00e1ceres", "given": "C." } }, { "id": "Melo-C-H-F", "name": { "family": "Melo", "given": "C. H. F." } }, { "id": "Sterzik-M-F", "name": { "family": "Sterzik", "given": "M. F." } }, { "id": "Minniti-D", "name": { "family": "Minniti", "given": "D." }, "orcid": "0000-0002-7064-099X" } ] }, "title": "WISE J061213.85-303612.5: a new T-dwarf binary candidate", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 binaries: visual \u2013 techniques: high angular resolution", "note": "\u00a9 2015 ESO. Article published by EDP Sciences. \n\nReceived 9 January 2015; Accepted 24 March 2015; Published online 22 May 2015. \n\nThis work used data collected at the VLT under runs 89.C-0494(A, B, C) and 91.C-0501(A, B). \n\nBased on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA), and the Canadian Astronomy Data Centre (CADC/NRC/CSA). \n\nWe thank the referee, C. Reyle, for her useful comments. This research has been funded by Spanish grants AYA2010-21161-C02-02 and AYA2012-38897-C02-01. Support for N.H., J.B., R.K., and D.M. is provided by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS. J.B. is supported by FONDECYT No.1120601, R.K. is supported by Fondecyt Reg. No. 1130140. D.M. is also supported by FONDECYT No.1130196 and by the Center for Astrophysics and Associated Technologies CATA PFB-06. C.C. acknowledges the support from project CONICYT FONDECYT Postdoctorado 3140592. We are indebted to the Paranal staff for their support during the runs. N.H. thanks H. Bouy for useful discussions. This research has benefited from the M, L, T, and Y dwarf compendium housed at DwarfArchives.org.\n\nPublished - aa25634-15.pdf
Submitted - 1504.03150v1.pdf
", "abstract": "Context. T and Y dwarfs are among the coolest and least luminous objects detected, and they can help to understand the properties of giant planets. Up to now, there are more than 350 T dwarfs that have been identified thanks to large imaging surveys in the infrared, and their multiplicity properties can shed light on the formation process.\nAims. The aim of this work is to look for companions around a sample of seven ultracoool objects. Most of them have been discovered by the WISE observatory and have not been studied before for multiplicity.\nMethods. We observed a sample six T dwarfs and one L9 dwarf with the Laser Guide Star (LGS) and NAOS-CONICA, the adaptive optics (AO) facility, and the near infrared camera at the ESO Very Large Telescope. We observed all the objects in one or more near-IR filters (JHK_s).\nResults. From the seven observed objects, we have identified a subarcsecond binary system, WISE J0612-3036, composed of two similar components with spectral types of T6. We measure a separation of \u03c1 = 350 \u00b1 5\u2009mas and a position angle of PA = 235 \u00b1 1\u00b0. Using the mean absolute magnitudes of T6 dwarfs in the 2MASS JHK_s bands, we estimate a distance of d = 31 \u00b1 6\u2009pc and derive a projected separation of \u03c1 ~ 11 \u00b1 2\u2009au. Another target, WISE J2255-3118, shows a very faint object at 1.\u030b3 in the K_s image. The object is marginally detected in H, and we derive a near infrared color of H \u2212 Ks> 0.1\u2009mag. HST/WFC3 public archival data reveals that the companion candidate is an extended source. Together with the derived color, this suggests that the source is most probably a background galaxy. The five other sources are apparently single, with 3-\u03c3 sensitivity limits between H = 19\u201321 for companions at separations \u2265 0.\u030b5.\nConclusions. WISE\u20090612-3036 is probably a new T-dwarf binary composed of two T6 dwarfs. As in the case of other late T-dwarf binaries, it shows a mass ratio close to 1, although its projected separation, ~11\u2009au, is larger than the average (~5\u2009au). Additional observations are needed to confirm that the system is bound.", "date": "2015-06", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "578", "publisher": "EDP Sciences", "pagerange": "Art. No. A1", "id_number": "CaltechAUTHORS:20150519-093429110", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-093429110", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Ministerio de Educaci\u00f3n y Ciencia (MEC)", "grant_number": "AYA2010-21161-C02-02" }, { "agency": "Ministerio de Educaci\u00f3n y Ciencia (MEC)", "grant_number": "AYA2012-38897-C02-01" }, { "agency": "Iniciativa Cient\u00edfica Milenio del Ministerio de Econom\u00eda, Fomento y Turismo", "grant_number": "IC120009" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1120601" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130140" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130196" }, { "agency": "Basal-CATA", "grant_number": "PFB-06/2007" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "3140592" } ] }, "doi": "10.1051/0004-6361/201525634", "primary_object": { "basename": "1504.03150v1.pdf", "url": "https://authors.library.caltech.edu/records/enp1k-ssv74/files/1504.03150v1.pdf" }, "related_objects": [ { "basename": "aa25634-15.pdf", "url": "https://authors.library.caltech.edu/records/enp1k-ssv74/files/aa25634-15.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Hu\u00e9lamo, N.; Ivanov, V. D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2kekr-epd43", "eprint_id": 57668, "eprint_status": "archive", "datestamp": "2023-08-22 15:35:24", "lastmod": "2023-10-23 17:37:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Bowler-B-P", "name": { "family": "Bowler", "given": "Brendan P." }, "orcid": "0000-0003-2649-2288" }, { "id": "Vigan-A", "name": { "family": "Vigan", "given": "Arthur" }, "orcid": "0000-0002-5902-7828" }, { "id": "Aller-K-M", "name": { "family": "Aller", "given": "Kimberly M." }, "orcid": "0000-0003-0208-6146" }, { "id": "Liu-Michael-C", "name": { "family": "Liu", "given": "Michael C." }, "orcid": "0000-0003-2232-7664" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Matthews-E", "name": { "family": "Matthews", "given": "Elisabeth" } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Zahed" }, "orcid": "0000-0001-8269-324X" }, { "id": "Kraus-Stefan", "name": { "family": "Kraus", "given": "Stefan" }, "orcid": "0000-0001-6017-8773" }, { "id": "Baraffe-I", "name": { "family": "Baraffe", "given": "Isabelle" } }, { "id": "Chabrier-G", "name": { "family": "Chabrier", "given": "Gilles" }, "orcid": "0000-0002-8342-9149" } ] }, "title": "Early Results from VLT SPHERE: Long-slit Spectroscopy of 2MASS 0122\u20132439 B, a Young Companion Near the Deuterium Burning Limit", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics; instrumentation: spectrographs; planets and satellites: detection; techniques: high angular resolution", "note": "\u00a9 2015 American Astronomical Society. \n\nReceived 2015 March 18; accepted 2015 April 24; published 2015 May 19. \n\nWe thank the anonymous referee for several useful comments. The research of K.M.A. was supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1329626. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors' and do not necessarily reflect the views of the National Science Foundation. S.K. acknowledges support from an STFC Ernest Rutherford Fellowship ST/J004030/1, Ernest Rutherford grant (ST/K003445/1), and Marie Curie CIG grant (SH-06192). This work is partly supported by Royal Society award WM090065 and the consolidated STFC grant ST/J001627/1. The research leading to these results has received funding from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013 grant agreement No. 247060).\n\nPublished - 2041-8205_805_1_L10.pdf
Submitted - 1504.07240v2.pdf
", "abstract": "We present 0.95\u20131.80 \u03bcm spectroscopy of the ~12\u201327 M_(Jup) companion orbiting the faint (R ~ 13.6), young (~120 Myr) M-dwarf 2MASS J01225093\u20132439505 (\"2M0122\u20132439 B\") at 1farcs 5 separation (50 AU). Our coronagraphic long-slit spectroscopy was obtained with the new high contrast imaging platform Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) during Science Verification. The unique long-slit capability of SPHERE enables spectral resolution an order of magnitude higher than other extreme AO exoplanet imaging instruments. With a low mass, cool temperature, and very red colors, 2M0122\u20132439 B occupies a particularly important region of the substellar color\u2013magnitude diagram by bridging the warm directly imaged hot planets with late-M/early-L spectral types (e.g., \u03b2 Pic b and ROXs 42Bb) and the cooler, dusty objects near the L/T transition (HR 8799bcde and 2MASS 1207b). We fit BT-Settl atmospheric models to our R \u2248 350 spectrum and find T_(eff) = 1600 \u00b1 100 K and log (g) = 4.5 \u00b1 0.5 dex. Visual analysis of our 2M0122\u20132439 B spectrum suggests a spectral type L3\u2013L4, and we resolve shallow J-band alkali lines, confirming its low gravity and youth. Specifically, we use the Allers & Liu spectral indices to quantitatively measure the strength of the FeH, VO, KI, spectral features, as well as the overall H-band shape. Using these indices, along with the visual spectral type analysis, we classify 2M0122\u20132439 B as an intermediate gravity object with spectral type L3.7 \u00b1 1.0.", "date": "2015-05-20", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "805", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L10", "id_number": "CaltechAUTHORS:20150519-141040657", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-141040657", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF Graduate Research Fellowship", "grant_number": "DGE-1329626" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/J004030/1" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/K003445/1" }, { "agency": "Marie Curie Fellowship", "grant_number": "SH-06192" }, { "agency": "Royal Society", "grant_number": "WM090065" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/J001627/1" }, { "agency": "European Research Council (ERC)", "grant_number": "247060" } ] }, "doi": "10.1088/2041-8205/805/1/L10", "primary_object": { "basename": "1504.07240v2.pdf", "url": "https://authors.library.caltech.edu/records/2kekr-epd43/files/1504.07240v2.pdf" }, "related_objects": [ { "basename": "2041-8205_805_1_L10.pdf", "url": "https://authors.library.caltech.edu/records/2kekr-epd43/files/2041-8205_805_1_L10.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Hinkley, Sasha; Bowler, Brendan P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xjb9e-rrk86", "eprint_id": 57682, "eprint_status": "archive", "datestamp": "2023-08-20 06:20:06", "lastmod": "2023-10-23 17:38:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Blain-Pascal", "name": { "family": "Blain", "given": "Pascal" } }, { "id": "D\u00e9cultot-Marc", "name": { "family": "D\u00e9cultot", "given": "Marc" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "Polarization holography for vortex retarders recording: laboratory demonstration", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2015 Optical Society of America.\n\nReceived 20 February 2015; revised 22 April 2015; accepted 22 April 2015; posted 23 April 2015 (Doc. ID 235018); published 15 May 2015.\n\nEuropean Research Council (ERC) (337569); Fonds pour la formation \u00e0 la Recherche dans l'Industrie et l'Agriculture (FRIA).\n\nThe authors want to thank Dr. Gene Serabyn and Dr. Kurt Liewer for their help with the measurement with a polarizing microscope of the phase retard induced by another prototype at the Jet Propulsion Laboratory.\n\nThe authors also wants to thank Lo\u00efc Lichawski and Julien Salon for their help during the manufacturing of the retarders.\n\nPublished - ao-54-15-4765.pdf
", "abstract": "This paper will present a prototype of the first set of vortex retarders made of liquid crystal polymers recorded by polarization holography. Vortex retarders are birefringent plates characterized by a rotation of their fast axis. Liquid crystals possess birefringent properties and they are locally orientable. Their orientation is defined by the perpendicular to the local orientation of the recording field. Polarization holography is a purely optical recording method. It is based on the superimposition of coherent and differently polarized beams. It is used to shape the electric field pattern to enable the recording of vortex retarders. The paper details the mathematical model of the superimposition process. The recording setup is exposed; it is characterized by a nearly common path interferometer. Two sets of measurements allowing the prediction of the retarder's features are presented and compared. Finally, the experimentally recorded retarder is shown, its characteristics are investigated and compared to the predicted ones.", "date": "2015-05-20", "date_type": "published", "publication": "Applied Optics", "volume": "54", "number": "15", "publisher": "Optical Society of America", "pagerange": "4765-4770", "id_number": "CaltechAUTHORS:20150520-074243334", "issn": "0003-6935", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-074243334", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA)" } ] }, "doi": "10.1364/AO.54.004765", "primary_object": { "basename": "ao-54-15-4765.pdf", "url": "https://authors.library.caltech.edu/records/xjb9e-rrk86/files/ao-54-15-4765.pdf" }, "resource_type": "article", "pub_year": "2015", "author_list": "Piron, Pierre; Blain, Pascal; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jjasg-4mc78", "eprint_id": 57653, "eprint_status": "archive", "datestamp": "2023-08-20 00:09:46", "lastmod": "2023-10-23 17:36:22", "type": "monograph", "metadata_visibility": "show", "creators": { "items": [ { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Diversity among other worlds: characterization of exoplanets by direct detection", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2008 Submitted on 15 Nov 2008. last revised 4 Dec 2008.\n\nSubmitted - 0811.2496.pdf
", "abstract": "The physical characterization of exoplanets will require to take spectra at several orbital positions. For that purpose, a direct imaging capability is necessary. Direct imaging requires an efficient stellar suppression mechanism, associated with an ultrasmooth telescope. We show that before future large space missions interferometer, 4-8 m class coronograph, external occulter or Fresnel imager), direct imaging of giant planets and close-by super-Earth are at the cross-road of a high scientific interest and a reasonable feasibility. The scientific interest lies in the fact that super-Earths share common geophysical attributes with Earths. They already begin to be detected by radial velocity (RV)\nand, together with giant planets, they have a larger area than Earths, making them detectable with a 1.5-2 m class\ntelescope in reflected light. We propose such a (space) telescope be a first step before large direct imaging missions.", "date": "2015-05-19", "date_type": "published", "id_number": "CaltechAUTHORS:20150519-103610148", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-103610148", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.48550/arXiv.0811.2496", "primary_object": { "basename": "0811.2496.pdf", "url": "https://authors.library.caltech.edu/records/jjasg-4mc78/files/0811.2496.pdf" }, "resource_type": "monograph", "pub_year": "2015", "author_list": "Schneider, J. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zpmnq-awr09", "eprint_id": 57932, "eprint_status": "archive", "datestamp": "2023-08-22 15:27:25", "lastmod": "2023-10-23 17:55:03", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "De-Boer-J", "name": { "family": "De Boer", "given": "J." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9." }, "orcid": "0000-0002-9173-0740" } ] }, "title": "New constraints on the dust surrounding HR 4796A", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; planetary systems; stars: individual: HR 4796A; scattering; instrumentation: polarimeters", "note": "\u00a9 2015 ESO. \n\nReceived 7 April 2014. Accepted 9 February 2015. \n\nJ.M. acknowledges financial support from the ESO studentship\nprogram and the Labex OSUG2020. C. Pinte acknowledges funding\nfrom the Agence Nationale pour la Recherche (ANR) of France under contract ANR-2010-JCJC-0504-01. We would like to thank John Krist for his initial help with the NICMOS data and we thank ESO staff and technical operators at the Paranal Observatory.\n\nPublished - aa23950-14.pdf
Submitted - 1407.2539v4.pdf
", "abstract": "Context. HR 4796A is surrounded by a well-structured and very bright circumstellar disc shaped like an annulus with many interesting features: very sharp inner and outer edges, brightness asymmetries, centre offset, and suspected distortions in the ring.\n\nAims. We aim to constrain the properties of the dust surrounding the star HR 4796A, in particular the grain size and composition. We also want to confirm and refine the morphological parameters derived from previous scattered light observations, and reveal the dust spatial extent in regions unexplored so far due to their proximity to the star.\n\nMethods. We have obtained new images in polarised light of the binary system HR 4796A and B in the Ks and L\u2032 band with the NaCo instrument at the Very Large Telescope (VLT). In addition, we revisit two archival data sets obtained in the L\u2032 band with that same instrument and at 2.2 \u03bcm with the NICMOS instrument on the Hubble Space Telescope. We analyse these observations with simulations using the radiative transfer code MCFOST to investigate the dust properties. We explore a grid of models with various dust compositions and sizes in a Bayesian approach.\n\nResults. We detect the disc in polarised light in the Ks band and reveal for the first time the innermost regions down to 0.3\u2033 along the semi-minor axis. We measure a polarised fraction of 29% \u00b1 8% in the two disc ansae, with a maximum occurring more than 13\u00b0 westwards from the ansae. A very pronounced brightness asymmetry between the north-west and south-east side is detected. This contradicts the asymmetry previously reported in all images of the disc in unpolarised light at wavelengths smaller than or equal to 2.2 \u03bcm and is inconsistent with the predicted scattered light from spherical grains using the Mie theory. Our modelling suggests the north-west side is most likely inclined towards the Earth, contrary to previous conclusions. It shows that the dust is composed of porous aggregates larger than 1 \u03bcm.", "date": "2015-05", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "577", "publisher": "EDP Sciences", "pagerange": "A57", "id_number": "CaltechAUTHORS:20150602-095151702", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150602-095151702", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "Agence Nationale de la Recherche (ANR)", "grant_number": "ANR-2010-JCJC-0504-01" }, { "agency": "LabEx", "grant_number": "OSUG2020" } ] }, "doi": "10.1051/0004-6361/201423950", "primary_object": { "basename": "1407.2539v4.pdf", "url": "https://authors.library.caltech.edu/records/zpmnq-awr09/files/1407.2539v4.pdf" }, "related_objects": [ { "basename": "aa23950-14.pdf", "url": "https://authors.library.caltech.edu/records/zpmnq-awr09/files/aa23950-14.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Milli, J.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4p0sn-2x090", "eprint_id": 57877, "eprint_status": "archive", "datestamp": "2023-08-22 15:00:11", "lastmod": "2023-10-23 17:50:43", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hardy-A", "name": { "family": "Hardy", "given": "A." } }, { "id": "Schreiber-M-R", "name": { "family": "Schreiber", "given": "M. R." } }, { "id": "Parsons-S-G", "name": { "family": "Parsons", "given": "S. G." } }, { "id": "C\u00e1ceres-C", "name": { "family": "C\u00e1ceres", "given": "C." } }, { "id": "Retamales-G", "name": { "family": "Retamales", "given": "G." } }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Canovas-H", "name": { "family": "Canovas", "given": "H." }, "orcid": "0000-0001-7668-8022" }, { "id": "Cieza-L-A", "name": { "family": "Cieza", "given": "L." }, "orcid": "0000-0002-2828-1153" }, { "id": "Marsh-T-R", "name": { "family": "Marsh", "given": "T. R." }, "orcid": "0000-0002-2498-7589" }, { "id": "Bours-M-C-P", "name": { "family": "Bours", "given": "M. C. P." } }, { "id": "Dhillon-V-S", "name": { "family": "Dhillon", "given": "V. S." } }, { "id": "Bayo-A", "name": { "family": "Bayo", "given": "A." } } ] }, "title": "The First Science Results from Sphere: Disproving the Predicted Brown Dwarf Around V471 Tau", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: close; binaries: eclipsing; brown dwarfs; planet-star interactions; stars: individual (V471 Tau); white dwarfs", "note": "\u00a9 2015 The American Astronomical Society.\n\nReceived 2014 December 17; Accepted 2015 January 16; Published 2015 February 18.\n\nA.H., M.R.S., C.C., H.C., L.C., and A.B. acknowledge support from the Millennium Nucleus RC130007 (Chilean Ministry of Economy). M.R.S., S.P., C.C., L.C., and A.B. also acknowledge support from FONDECYT grants 1141269,\n3140585, 3140592, 1440109, and 11140572, respectively. T.R.M. thanks the UK's Science and Technology Facilities Council for support during the course of this work under grant ST/L000733/1.\n\nPublished - apjl_800_2_L24.pdf
Submitted - 1502.05116v1.pdf
", "abstract": "Variations of eclipse arrival times have recently been detected in several post-common envelope binaries consisting of a white dwarf and a main-sequence companion star. The generally favored explanation for these timing variations is the gravitational pull of one or more circumbinary substellar objects periodically moving the center of mass of the host binary. Using the new extreme-AO instrument SPHERE, we image the prototype eclipsing post-common envelope binary V471 Tau in search of the brown dwarf that is believed to be responsible for variations in its eclipse arrival times. We report that an unprecedented contrast of ${\\Delta }{{m}_{H}}=12.1$ at a separation of 260 mas was achieved, but resulted in a non-detection. This implies that there is no brown dwarf present in the system unless it is 3 mag fainter than predicted by evolutionary track models, and provides damaging evidence against the circumbinary interpretation of eclipse timing variations. In the case of V471 Tau, a more consistent explanation is offered with the Applegate mechanism, in which these variations are prescribed to changes in the quadrupole moment within the main-sequence star.", "date": "2015-02-20", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "800", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. L24", "id_number": "CaltechAUTHORS:20150528-113208638", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-113208638", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Millennium Nucleus", "grant_number": "RC130007" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1141269" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "3140585" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "3140592" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1440109" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "11140572" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/L000733/1" } ] }, "doi": "10.1088/2041-8205/800/2/L24", "primary_object": { "basename": "1502.05116v1.pdf", "url": "https://authors.library.caltech.edu/records/4p0sn-2x090/files/1502.05116v1.pdf" }, "related_objects": [ { "basename": "apjl_800_2_L24.pdf", "url": "https://authors.library.caltech.edu/records/4p0sn-2x090/files/apjl_800_2_L24.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Hardy, A.; Schreiber, M. R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/n3pzy-tjw29", "eprint_id": 57897, "eprint_status": "archive", "datestamp": "2023-08-22 14:52:44", "lastmod": "2023-10-23 17:52:41", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ivanov-V-D", "name": { "family": "Ivanov", "given": "V. D." } }, { "id": "Vaisanen-P", "name": { "family": "Vaisanen", "given": "P." } }, { "id": "Kniazev-A-Y", "name": { "family": "Kniazev", "given": "A. Y." } }, { "id": "Beletsky-Y", "name": { "family": "Beletsky", "given": "Y." } }, { "id": "Mamajek-E-E", "name": { "family": "Mamajek", "given": "E. E." }, "orcid": "0000-0003-2008-1488" }, { "id": "Mu\u017eic-K", "name": { "family": "Mu\u017eic", "given": "K." } }, { "id": "Beam\u00edn-J-C", "name": { "family": "Beam\u00edn", "given": "J. C." } }, { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "H. M. J." } }, { "id": "Pourbaix-D", "name": { "family": "Pourbaix", "given": "D." } }, { "id": "Gandhi-Poshak", "name": { "family": "Gandhi", "given": "P." }, "orcid": "0000-0003-3105-2615" }, { "id": "Gulbis-A-A-S", "name": { "family": "Gulbis", "given": "A." } }, { "id": "Monaco-L", "name": { "family": "Monaco", "given": "L." } }, { "id": "Saviane-I", "name": { "family": "Saviane", "given": "I." } }, { "id": "Kurtev-R", "name": { "family": "Kurtev", "given": "R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Borissova-J", "name": { "family": "Borissova", "given": "J." }, "orcid": "0000-0002-5936-7718" }, { "id": "Minniti-D", "name": { "family": "Minniti", "given": "Dante" }, "orcid": "0000-0002-7064-099X" } ] }, "title": "Properties of the solar neighbor WISE\u2009J072003.20\u2212084651.2", "ispublished": "pub", "full_text_status": "public", "keywords": "stars: distances; solar neighborhood; stars: low-mass; stars: individual: WISE J072003.20; 84651.2; proper motions; stars: individual: 2MASS J07200708; 0845589", "note": "\u00a9 2015 ESO.\n\nReceived: 30 August 2014; Accepted: 24 October 2014.\n\nSome observations reported in this paper were obtained\nwith the Southern African Large Telescope (SALT). Some observations reported in this paper were obtained with the ESO New Technology Telescope under program 60.A-9700. All SAAO and SALT co-authors acknowledge the support\nfrom the National Research Foundation (NRF) of South Africa.We acknowledge support from the FONDAP Center for Astrophysics 15010003; BASAL CATA Center for Astrophysics and Associated Technologies PFB-06; the Ministry\nfor the Economy, Development, and Tourisms Programa Inicativa Cientifica Milenio through grant IC 12009, awarded to The Millennium Institute of Astrophysics (MAS); FONDECYT grants No. 1090213, 1130196, and 1110326\nfrom CONICYT, and the European Southern Observatory. J.C.B. acknowledge support from a Ph.D. Fellowship from CONICYT. R.K. acknowledges partial support from FONDECYT through grant 1130140. J.B. acknowledges support from FONDECYT No. 1120601; P.G. thanks STFC for support (grant reference\nST/J003697/1). We have also made extensive use of the SIMBAD Database at CDS Strasbourg, of the 2MASS, which is a joint project of the University of Massachusetts and IPAC/CALTECH, funded by NASA and NSF, and of the VizieR catalogue access tool, CDS, Strasbourg, France. Based on data from CMC15 Data Access Service at CAB (INTA-CSIC). We thanks the anonymous referee for suggestions that helped to improve the paper.\n\nPublished - aa24883-14.pdf
Submitted - 1410.6792v1.pdf
", "abstract": "Context. The severe crowding towards the Galactic plane suggests that the census of nearby stars in that direction may be incomplete. Recently, Scholz reported a new M9 object at an estimated distance d \u2243 7 pc (WISE J072003.20\u2212084651.2; hereafter WISE\u2009J0720) at Galactic latitude b = 2.3\u00b0.\n\nAims. Our goals are to determine the physical characteristics of WISE\u2009J0720, its kinematic properties, and to address the question of whether it is a binary object, as was suggested in the discovery paper.\n\nMethods. Optical and infrared spectroscopy from the Southern African Large Telescope and Magellan, respectively, and spectral energy distribution fitting were used to determine the spectral type of WISE\u2009J0720. The measured radial velocity, proper motion, and parallax yielded its Galactic velocities. We also investigated if WISE\u2009J0720 may show X-ray activity based on archival data.\n\nResults. Our spectra are consistent with spectral type L0\u00b11. We find no evidence for binarity, apart from a minor 2\u03c3 level difference in the radial velocities taken at two different epochs. The spatial velocity of WISE\u2009J0720 does not connect it to any known moving group; instead, it places the object with high probability in the old thin disk or in the thick disk. The spectral energy distribution fit hints at excess in the 12 \u03bcm and 22 \u03bcm WISE bands which may be due to a redder companion, but the same excess is visible in other late-type objects, and it more likely implies a shortcoming of the models (e.g., problems with the effective wavelengths of the filters for these extremely cool objects, etc.) rather than a disk or redder companion. The optical spectrum shows some H\u03b1 emission, indicative of stellar activity. Archival X-ray observations yield no detection.\n\nConclusions. WISE\u2009J0720 is a new member of the solar neighborhood, the third nearest L dwarf. Our data do not support the hypothesis of its binary nature.", "date": "2015-02", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "574", "publisher": "EDP Sciences", "pagerange": "Art. No. A64", "id_number": "CaltechAUTHORS:20150529-101522107", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-101522107", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Research Foundation (NRF) of South Africa" }, { "agency": "FONDAP Center for Astrophysics", "grant_number": "15010003" }, { "agency": "BASAL CATA Center for Astrophysics and Associated Technologies", "grant_number": "PFB-06" }, { "agency": "Ministry for the Economy, Development, and Tourisms Programa Inicativa Cientifica Milenio", "grant_number": "IC 12009" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1090213" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130196" }, { "agency": "Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica (CONICYT)", "grant_number": "1110326" }, { "agency": "European Southern Observatory" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130140" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1120601" }, { "agency": "Science and Technology Facilities Council (STFC)", "grant_number": "ST/J003697/1" }, { "agency": "NASA" }, { "agency": "NSF" } ] }, "doi": "10.1051/0004-6361/201424883", "primary_object": { "basename": "1410.6792v1.pdf", "url": "https://authors.library.caltech.edu/records/n3pzy-tjw29/files/1410.6792v1.pdf" }, "related_objects": [ { "basename": "aa24883-14.pdf", "url": "https://authors.library.caltech.edu/records/n3pzy-tjw29/files/aa24883-14.pdf" } ], "resource_type": "article", "pub_year": "2015", "author_list": "Ivanov, V. D.; Vaisanen, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/05a08-z4703", "eprint_id": 57857, "eprint_status": "archive", "datestamp": "2023-08-20 02:56:09", "lastmod": "2023-10-23 17:49:44", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne Marie" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "Jean-Charles" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Lannier-J", "name": { "family": "Lannier", "given": "Justine" } }, { "id": "Keppler-M", "name": { "family": "Keppler", "given": "Miriam" } } ] }, "title": "Deep imaging of \u03b2 Pictoris at L': asymmetries in the disc and constraints on planets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 ESO.\n\nPublished - betaPic30proc_JulienMilli_1.pdf
", "abstract": "We demonstrate here the potential of VLT/NaCo at\nL' (3.8\u03bcm) in Angular Differential Imaging (ADI). We detect\nthe \u03b2 Pictoris disc above 5\u03c3 between 0.4'' and 3.8'', after\ncombining data from 7 epochs or 3.1 years. To avoid the\nsmearing of the planet due to its orbital motion within this\ntime span (green arrow), we subtracted the planet from the\n7 datasets. We used a star subtraction technique based on\nPCA (Soummer et al. 2012) and corrected for ADI biases by\niterating. We implemented a forward modeling approach to\nconstrain the dust distribution.", "date": "2014-09-12", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-112409906", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-112409906", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "betaPic30proc_JulienMilli_1.pdf", "url": "https://authors.library.caltech.edu/records/05a08-z4703/files/betaPic30proc_JulienMilli_1.pdf" }, "resource_type": "conference_item", "pub_year": "2014", "author_list": "Milli, Julien; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ga384-g2240", "eprint_id": 57858, "eprint_status": "archive", "datestamp": "2023-08-20 02:54:37", "lastmod": "2023-10-23 17:49:47", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hinkley-S", "name": { "family": "Hinkley", "given": "Sasha" }, "orcid": "0000-0001-8074-2562" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Padgett-D-L", "name": { "family": "Padgett", "given": "Deborah" }, "orcid": "0000-0001-5334-5107" }, { "id": "Morales-F-Y", "name": { "family": "Morales", "given": "Farisa" }, "orcid": "0000-0001-9414-3851" }, { "id": "Kraus-A-L", "name": { "family": "Kraus", "given": "Adam" }, "orcid": "0000-0001-9811-568X" }, { "id": "Ireland-M-J", "name": { "family": "Ireland", "given": "Mike" }, "orcid": "0000-0002-6194-043X" }, { "id": "Carpenter-J-M", "name": { "family": "Carpenter", "given": "John" }, "orcid": "0000-0003-2251-0602" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "K\u00fchn-J-G", "name": { "family": "K\u00fchn", "given": "Jonas" } } ] }, "title": "An AO Survey of the First Sample of Debris Disk Stars from WISE", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 ESO.\n\nPublished - betaPic30proc_SaschaHinkley.pdf
", "abstract": "[No abstract]", "date": "2014-09-10", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-115049934", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-115049934", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "betaPic30proc_SaschaHinkley.pdf", "url": "https://authors.library.caltech.edu/records/ga384-g2240/files/betaPic30proc_SaschaHinkley.pdf" }, "resource_type": "conference_item", "pub_year": "2014", "author_list": "Hinkley, Sasha; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rg01a-vsb05", "eprint_id": 57807, "eprint_status": "archive", "datestamp": "2023-08-22 13:39:16", "lastmod": "2023-10-23 17:46:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Wahhaj-Z", "name": { "family": "Wahhaj", "given": "Z." }, "orcid": "0000-0001-8269-324X" }, { "id": "Pelat-D", "name": { "family": "Pelat", "given": "D." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" }, { "id": "Marois-C", "name": { "family": "Marois", "given": "C." }, "orcid": "0000-0002-4164-4182" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" } ] }, "title": "Fundamental Limitations of High Contrast Imaging Set by Small Sample Statistics", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: statistical; techniques: high angular resolution", "note": "\u00a9 2014 The American Astronomical Society.\n\nReceived 2014 January 16; Accepted 2014 July 7; Published 2014 August 21.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile). The authors thank the referee, Professor Dmitry Savransky, for his critical, thorough, and very constructive review of the manuscript. The research leading to these results has received funding from the European Research Council Under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - apj_792_2_97.pdf
Submitted - 1407.2247v1.pdf
", "abstract": "In this paper, we review the impact of small sample statistics on detection thresholds and corresponding confidence levels (CLs) in high-contrast imaging at small angles. When looking close to the star, the number of resolution elements decreases rapidly toward small angles. This reduction of the number of degrees of freedom dramatically affects CLs and false alarm probabilities. Naively using the same ideal hypothesis and methods as for larger separations, which are well understood and commonly assume Gaussian noise, can yield up to one order of magnitude error in contrast estimations at fixed CL. The statistical penalty exponentially increases toward very small inner working angles. Even at 5-10 resolution elements from the star, false alarm probabilities can be significantly higher than expected. Here we present a rigorous statistical analysis that ensures robustness of the CL, but also imposes a substantial limitation on corresponding achievable detection limits (thus contrast) at small angles. This unavoidable fundamental statistical effect has a significant impact on current coronagraphic and future high-contrast imagers. Finally, the paper concludes with practical recommendations to account for small number statistics when computing the sensitivity to companions at small angles and when exploiting the results of direct imaging planet surveys.", "date": "2014-09-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "792", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 97", "id_number": "CaltechAUTHORS:20150526-113446870", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-113446870", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "NASA/JPL/Caltech" }, { "agency": "Actions de Recherche Concertees (Communaut\u00e9 Fran\u00e7aise de Belgique)" } ] }, "doi": "10.1088/0004-637X/792/2/97", "primary_object": { "basename": "apj_792_2_97.pdf", "url": "https://authors.library.caltech.edu/records/rg01a-vsb05/files/apj_792_2_97.pdf" }, "related_objects": [ { "basename": "1407.2247v1.pdf", "url": "https://authors.library.caltech.edu/records/rg01a-vsb05/files/1407.2247v1.pdf" } ], "resource_type": "article", "pub_year": "2014", "author_list": "Mawet, D.; Milli, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dd0v4-qs798", "eprint_id": 57676, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:21", "lastmod": "2024-01-13 16:18:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-F", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Antichi-J", "name": { "family": "Antichi", "given": "Jacopo" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Jolissaint-L", "name": { "family": "Jolissaint", "given": "Laurent" } }, { "id": "Carbillet-M", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Rabou-P", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Giro-E", "name": { "family": "Giro", "given": "Enrico" } }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "Denis" } } ] }, "title": "Discretized aperture mapping with a micro-lenses array for interferometric direct imaging", "ispublished": "unpub", "full_text_status": "public", "keywords": "adaptive optique, aliasing, spatial filtering, micro-lenses array", "note": "\u00a9 2014 SPIE.\n\nPublished - 396356.pdf
", "abstract": "Discretized Aperture Mapping (DAM) appears as an original filtering technique easy to play with existing adaptive optics (AO) systems. In its essential DAM operates as an optical passive filter removing part of the phase residuals in the wavefront without introducing any difficult-to-align component in the Fourier conjugate of the entrance pupil plane. DAM reveals as a new interferometric technique combined with spatial filtering allowing direct imaging over a narrow field of view (FOV). In fact, the entrance pupil of a single telescope is divided into many sub-pupils so that the residual phase in each sub-pupil is filtered up to the DAM cut-off frequency. DAM enables to smooth the small scale wavefront defects which correspond to high spatial frequencies in the pupil plane and to low angular frequencies in the image plane. Close to the AO Nyquist frequency, such pupil plane spatial frequencies are not well measured by the wavefront sensor (WFS) due to aliasing. Once bigger than the AO Nyquist frequency, they are no more measured by the WFS due to the fitting limit responsible for the narrow AO FOV. The corresponding image plane angular frequencies are not transmitted by DAM and are useless to image small FOVs, as stated by interferometry. That is why AO and DAM are complementary assuming that the DAM cut-off frequency is equal to the AO Nyquist frequency. Here we describe the imaging capabilities when DAM is placed downstream an AO system, over a convenient pupil which precedes the scientific detector. We show firstly that the imaging properties are preserved on a narrow FOV allowing direct imaging throughout interferometry. Then we show how the residual pupil plane spatial frequencies bigger than the AO Nyquist one are filtered out, as well as the residual halo in the image is dimmed.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150519-152500652", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-152500652", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2058594", "primary_object": { "basename": "396356.pdf", "url": "https://authors.library.caltech.edu/records/dd0v4-qs798/files/396356.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Patru, Fabien; Antichi, Jacopo; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/az2mm-kwy92", "eprint_id": 57679, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:31", "lastmod": "2024-01-13 16:18:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fusco-T", "name": { "family": "Fusco", "given": "T." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Final performance and lesson-learned of SAXO, the VLT-SPHERE extreme AO: From early design to on-sky results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Instrumentation: Adaptive Optics, Coronagraph, High Contrast Imaging - Methods: Wavefront Sensing, Control, Phase Diversity, Shack-Hartmann", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 5 September 2014.\n\nPublished - 396358.pdf
", "abstract": "The extreme AO system, SAXO (SPHERE AO for eXoplanet Observation), is the heart of the SPHERE system, feeding the scientific instruments with flat wave front corrected from all the atmospheric turbulence and internal defects. We will present the final performance of SAXO obtained during the instrument AIT in Europe as well as the very first on-sky results. The main requirements and system characteristics will be recalled and the full AO loop performance will be quantified and compared to original specifications. It will be demonstrated that SAXO meets or even exceeds (especially its limit magnitude and its jitter residuals) its challenging requirements (more than 90% of SR in H band and a 3 mas residual jitter). Finally, after 10 years of AO developments, from early design to final on-sky implementations, some critical system aspects as well as some important lesson-learned will be presented in the perspective of the future generation of complex AO systems for VLTs and ELTs.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91481U", "id_number": "CaltechAUTHORS:20150520-070332046", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-070332046", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2055423", "primary_object": { "basename": "396358.pdf", "url": "https://authors.library.caltech.edu/records/az2mm-kwy92/files/396358.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Fusco, T. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ybj3q-jch86", "eprint_id": 57738, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:37", "lastmod": "2024-01-13 16:19:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Hinz-P-M", "name": { "family": "Hinz", "given": "P." }, "orcid": "0000-0002-1954-4564" }, { "id": "K\u00fchn-J", "name": { "family": "K\u00fchn", "given": "J." }, "orcid": "0000-0002-6344-4835" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Skemer-A-J", "name": { "family": "Skemer", "given": "A." }, "orcid": "0000-0001-6098-3924" }, { "id": "Wallace-K", "name": { "family": "Wallace", "given": "K." } }, { "id": "Bailey-V-P", "name": { "family": "Bailey", "given": "V." }, "orcid": "0000-0002-5407-2806" }, { "id": "Downey-E", "name": { "family": "Downey", "given": "E." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Durney-O", "name": { "family": "Durney", "given": "O." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Gomez-C", "name": { "family": "Gomez", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hoffmann-W-F", "name": { "family": "Hoffmann", "given": "W. F." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" }, { "id": "Leisenring-J-M", "name": { "family": "Leisenring", "given": "J." }, "orcid": "0000-0002-0834-6140" }, { "id": "Montoya-M", "name": { "family": "Montoya", "given": "M." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Skrutskie-M-F", "name": { "family": "Skrutskie", "given": "M." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam", "ispublished": "unpub", "full_text_status": "public", "keywords": "LBT, Adaptive Optics, coronagraphy, vortex phase mask, HR8799", "note": "2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 21 July 2014. \n\nLBTI is funded by a NASA grant in support of the Exoplanet Exploration Program (NSF 0705296). The LBT is an international collaboration among institutions in the United States, Italy and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university system; Istituto Nazionale di Astro Fisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota and University of Virginia. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium).\n\nPublished - 396370.pdf
Submitted - 1410.6244v1.pdf
", "abstract": "We present the first observations obtained with the L'-band AGPM vortex coronagraph recently installed on LBTI/LMIRCam. The AGPM (Annular Groove Phase Mask) is a vector vortex coronagraph made from diamond subwavelength gratings. It is designed to improve the sensitivity and dynamic range of high-resolution imaging at very small inner working angles, down to 0.09 arcseconds in the case of LBTI/LMIRCam in the L' band. During the first hours on sky, we observed the young A5V star HR8799 with the goal to demonstrate the AGPM performance and assess its relevance for the ongoing LBTI planet survey (LEECH). Preliminary analyses of the data reveal the four known planets clearly at high SNR and provide unprecedented sensitivity limits in the inner planetary system (down to the diffraction limit of 0.09 arcseconds).", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91483X", "id_number": "CaltechAUTHORS:20150521-105503591", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-105503591", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NSF 0705296" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2057205", "primary_object": { "basename": "1410.6244v1.pdf", "url": "https://authors.library.caltech.edu/records/ybj3q-jch86/files/1410.6244v1.pdf" }, "related_objects": [ { "basename": "396370.pdf", "url": "https://authors.library.caltech.edu/records/ybj3q-jch86/files/396370.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Defr\u00e8re, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2pc0c-c1x71", "eprint_id": 57678, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:26", "lastmod": "2024-01-13 16:18:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Sarazin-M-S", "name": { "family": "Sarazin", "given": "Marc S." } }, { "id": "Kuntschner-H", "name": { "family": "Kuntschner", "given": "Harald" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" } ] }, "title": "Real-time Strehl and image quality performance estimator at Paranal Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, Very Large Telescope, Strehl ratio, Observation scheduling, Quality Control,\nScience operations", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 5 September 2014.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Paranal, Vitacura (Santiago, Chile), and Garching (Germany).\n\nPublished - 396357.pdf
", "abstract": "Here we describe a prototype Strehl and image quality performance estimator and its integration into Paranal operations, starting with UT4 and its suite of three infrared instruments: adaptive optics-fed imager/spectrograph NACO (temporarily out of operations) and integral field unit SINFONI, as well as wide-field imager HAWK-I. The real-time estimator processes the ambient conditions (seeing, coherence time, airmass, etc.) from the DIMM, and telescope Shack-Hartmann image analyzer to produce estimates of image quality and Strehl ratio every ~ 30 seconds. The estimate is using ad-hoc instrumental models, based in part on the PAOLA adaptive optics simulator. We discuss the current performance of the estimator vs real IQ and Strehl measurements, its impact on service mode efficiency, prospects for full deployment at other UTs, its use for the adaptive optics facility (AOF), and inclusion of the SLODAR-measured fine turbulence characteristics.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91484T", "id_number": "CaltechAUTHORS:20150520-064945282", "isbn": "9780819496164", "book_title": "Adaptive Optics Systems IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-064945282", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2057263", "primary_object": { "basename": "396357.pdf", "url": "https://authors.library.caltech.edu/records/2pc0c-c1x71/files/396357.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, Dimitri; Smette, Alain; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4xjtv-gg634", "eprint_id": 57739, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:43", "lastmod": "2024-01-13 16:19:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Absil-Pierre-Antoine", "name": { "family": "Absil", "given": "Pierre-Antoine" }, "orcid": "0000-0003-2946-4178" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "G\u00f3mez-Gonz\u00e1lez-C-A", "name": { "family": "Gomez Gonzales", "given": "Carlos" }, "orcid": "0000-0003-2050-1710" }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "Elsa" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A\u0457ssa" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } }, { "id": "Van-Droogenbroeck-M", "name": { "family": "Van Droogenbroeck", "given": "Marc" } } ] }, "title": "The VORTEX project: first results and perspectives", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, high contrast imaging, coronagraphy, vortex phase mask", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 21 July 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium). The early successes of this project wouldn't have been possible without the contributions of many collaborators outside the co-authors of this paper (aka the \\VORTEX team\"). We would\nlike to thank particularly P. Riaud and J. Baudrand for their decisive contributions to the genesis of this project, A. Boccaletti and P. Baudoz for maintaining and sharing with us their coronagraphic test bench at Observatoire de Paris-Meudon, E. Pantin and the CEA team for inviting and helping us to piggyback on the VISIR upgrade, J. Girard and the excellent ESO staff for making possible the installation of the AGPM on NACO, P. Hinz\nand A. Skemer for installing one of our L-band AGPMs on LMIRCam, B. Mennesson and K. Wallace for manufacturing optimized Lyot stops for the AGPM on LMIRCam, R. Olivier for designing and manufacturing the opto-mechanical interfaces for the AGPM, D. Vandormael for printing centering cross hairs on some of our AGPMs, J.-F. Fagnard for cryo-testing the AGPMs, and finally C. Hanot for his many contributions to this endeavor.\n\nPublished - 396371.pdf
Submitted - 1410.5635v1.pdf
", "abstract": "Vortex coronagraphs are among the most promising solutions to perform high contrast imaging at small angular\nseparations from bright stars. They feature a very small inner working angle (down to the diffraction limit of\nthe telescope), a clear 360 degree discovery space, have demonstrated very high contrast capabilities, are easy\nto implement on high-contrast imaging instruments, and have already been extensively tested on the sky. Since 2005, we have been designing, developing and testing an implementation of the charge-2 vector vortex phase mask based on concentric sub-wavelength gratings, referred to as the Annular Groove Phase Mask (AGPM). Science-grade mid-infrared AGPMs were produced in 2012 for the first time, using plasma etching on synthetic diamond substrates. They have been validated on a coronagraphic test bench, showing broadband peak rejection up to 500:1 in the L band, which translates into a raw contrast of about 6 x 10^(-5) at 2\u22cb=D. Three of them have now been installed on world-leading diffraction-limited infrared cameras, namely VLT/NACO, VLT/VISIR and LBT/LMIRCam. During the science verification observations with our L-band AGPM on NACO, we observed the beta Pictoris system and obtained unprecedented sensitivity limits to planetary companions down to the diffraction limit (0.1\"). More recently, we obtained new images of the HR 8799 system at L band during the AGPM first light on LMIRCam. After reviewing these first results obtained with mid-infrared AGPMs, we will\ndiscuss the short- and mid-term goals of the on-going VORTEX project, which aims to improve the performance of our vortex phase masks for future applications on second-generation high-contrast imager and on future extremely large telescopes (ELTs). In particular, we will briefly describe our current efforts to improve the manufacturing of mid-infrared AGPMs, to push their operation to shorter wavelengths, and to provide deeper starlight extinction by creating new designs for higher topological charge vortices. Within the VORTEX project, we also plan to develop new image processing techniques tailored to coronagraphic images, and to study some pre- and post-coronagraphic concepts adapted to the vortex coronagraph in order to reduce scattered starlight\nin the final images.", "date": "2014-09-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150521-114932586", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-114932586", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "Close-L-M", "name": { "family": "Close", "given": "Laird M." } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.2055702", "primary_object": { "basename": "1410.5635v1.pdf", "url": "https://authors.library.caltech.edu/records/4xjtv-gg634/files/1410.5635v1.pdf" }, "related_objects": [ { "basename": "396371.pdf", "url": "https://authors.library.caltech.edu/records/4xjtv-gg634/files/396371.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Absil, Olivier; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6ptfn-82t94", "eprint_id": 57710, "eprint_status": "archive", "datestamp": "2023-08-20 02:52:00", "lastmod": "2024-01-13 16:18:55", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Shelton-Christopher", "name": { "family": "Shelton", "given": "Chris" }, "orcid": "0000-0001-8982-1654" }, { "id": "Wallace-James-C", "name": { "family": "Wallace", "given": "James" } }, { "id": "Bottom-Michael", "name": { "family": "Bottom", "given": "Michael" }, "orcid": "0000-0003-1341-5531" }, { "id": "K\u00fchn-Jonas-G", "name": { "family": "K\u00fchn", "given": "Jonas" } }, { "id": "Mennesson-Bertrand", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Burruss-Rick-S", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Bartos-Randy-D", "name": { "family": "Bartos", "given": "Randy" } }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "Demonstration of vortex coronagraph concepts for on-axis telescopes on the Palomar Stellar Double Coronagraph", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nDate Published: 4 September 2014.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 396364.pdf
", "abstract": "Here we present preliminary results of the integration of two recently proposed vortex coronagraph (VC) concepts for on-axis telescopes on the Stellar Double Coronagraph (SDC) bench behind PALM-3000, the extreme adaptive optics system of the 200-inch Hale telescope of Palomar observatory. The multi-stage vortex coronagraph (MSVC) uses the ability of the vortex to move light in and out of apertures through multiple VC in series to restore the nominal attenuation capability of the charge 2 vortex regardless of the aperture obscurations. The ring-apodized vortex coronagraph (RAVC) is a one-stage apodizer exploiting the VC Lyot-plane amplitude distribution in order to perfectly null the diffraction from any central obscuration size, and for any vortex topological charge. The RAVC is thus a simple concept that makes the VC immune to diffraction effects of the secondary mirror. It combines a vortex phase mask in the image plane with a single pupil-based amplitude ring apodizer, tailor-made to exploit the unique convolution properties of the VC at the Lyot-stop plane. The prototype apodizer uses the same microdot technology that was used to manufacture the apodized pupil Lyot coronagraph (APLC) equipping SPHERE, GPI and P1640.", "date": "2014-09-04", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150520-113150067", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-113150067", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2057274", "primary_object": { "basename": "396364.pdf", "url": "https://authors.library.caltech.edu/records/6ptfn-82t94/files/396364.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, Dimitri; Shelton, Chris; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/frnas-r5868", "eprint_id": 57835, "eprint_status": "archive", "datestamp": "2023-08-22 13:36:38", "lastmod": "2023-10-23 17:48:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Reggiani-M", "name": { "family": "Reggiani", "given": "Maddalena" }, "orcid": "0000-0003-2911-0898" }, { "id": "Quanz-S-P", "name": { "family": "Quanz", "given": "Sascha P." }, "orcid": "0000-0003-3829-7412" }, { "id": "Meyer-M-R", "name": { "family": "Meyer", "given": "Michael R." }, "orcid": "0000-0003-1227-3084" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Amara-A", "name": { "family": "Amara", "given": "Adam" } }, { "id": "Anglada-G", "name": { "family": "Anglada", "given": "Guillem" } }, { "id": "Avenhaus-H", "name": { "family": "Avenhaus", "given": "Henning" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Carrasco-Gonzalez-J", "name": { "family": "Carrasco Gonzalez", "given": "Carlos" } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "James" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Meru-F", "name": { "family": "Meru", "given": "Farzan" } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Osorio-M", "name": { "family": "Osorio", "given": "Mayra" } }, { "id": "Wolff-S", "name": { "family": "Wolff", "given": "Schuyler" } }, { "id": "Torrelles-J-M", "name": { "family": "Torrelles", "given": "Jose-Maria" } } ] }, "title": "Discovery of a Companion Candidate in the HD 169142 Transition Disk and the Possibility of Multiple Planet Formation", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs; planet-disk interactions; planets and satellites: formation; protoplanetary disks; stars: individual (HD 169142); stars: low-mass", "note": "\u00a9 2014 American Astronomical Society.\n\nReceived 2013 November 19; accepted 2014 July 29; published 2014 August 20.\n\nBased on observations obtained at the Gemini Observatory, operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: NSF (United States), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Minist\u00e9rio da Ci\u00eancia, Tecnologia e Inova\u00e7\u00e3o (Brazil) and Ministerio de Ciencia, Tecnolog\u00eda e Innovaci\u00f3n Productiva (Argentina). We thank Bruce Macintosh and the GPI team for support during the observations. G.A., C.C.-G., M.O., and J.M.T. acknowledge support from MINECO (Spain) AYA2011-30228-C03 grant.\n\nFacility: VLT:Yepun (NACO) - Very Large Telescope (Yepun)\n\nPublished - apjl_792_1_23.pdf
Submitted - 1408.0813v1.pdf
", "abstract": "We present L'- and J-band high-contrast observations of HD 169142, obtained with the Very Large Telescope/NACO AGPM vector vortex coronagraph and the Gemini Planet Imager, respectively. A source located at 0.\"156 \u00b1 0.''032 north of the host star (P.A. = 7\u00b0.4 \u00b1 11\u00b0.3) appears in the final reduced L' image. At the distance of the star (~145 pc), this angular separation corresponds to a physical separation of 22.7 \u00b1 4.7 AU, locating the source within the recently resolved inner cavity of the transition disk. The source has a brightness of L' = 12.2 \u00b1 0.5 mag, whereas it is not detected in the J band (J >13.8 mag). If its L' brightness arose solely from the photosphere of a companion and given the J \u2013 L' color constraints, it would correspond to a 28-32 M Jupiter object at the age of the star, according to the COND models. Ongoing accretion activity of the star suggests, however, that gas is left in the inner disk cavity from which the companion could also be accreting. In this case, the object could be lower in mass and its luminosity enhanced by the accretion process and by a circumplanetary disk. A lower-mass object is more consistent with the observed cavity width. Finally, the observations enable us to place an upper limit on the L'-band flux of a second companion candidate orbiting in the disk annular gap at ~50 AU, as suggested by millimeter observations. If the second companion is also confirmed, HD 169142 might be forming a planetary system, with at least two companions opening gaps and possibly interacting with each other.", "date": "2014-09-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "792", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L23", "id_number": "CaltechAUTHORS:20150526-162651428", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-162651428", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Ministerio de Econom\u00eda y Competitividad (MINECO)", "grant_number": "AYA2011-30228-C03" } ] }, "doi": "10.1088/2041-8205/792/1/L23", "primary_object": { "basename": "apjl_792_1_23.pdf", "url": "https://authors.library.caltech.edu/records/frnas-r5868/files/apjl_792_1_23.pdf" }, "related_objects": [ { "basename": "1408.0813v1.pdf", "url": "https://authors.library.caltech.edu/records/frnas-r5868/files/1408.0813v1.pdf" } ], "resource_type": "article", "pub_year": "2014", "author_list": "Reggiani, Maddalena; Quanz, Sascha P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g3bxp-x3925", "eprint_id": 87177, "eprint_status": "archive", "datestamp": "2023-08-20 02:39:59", "lastmod": "2024-01-14 20:15:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Norman-Colin", "name": { "family": "Norman", "given": "Colin" } }, { "id": "Soummer-R\u00e9mi", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "N'Diaye-Mamadou", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Hoffmann-Jordan", "name": { "family": "Hoffmann", "given": "Jordan" } }, { "id": "Carlotti-Alexis", "name": { "family": "Carlotti", "given": "Alexis" }, "orcid": "0000-0002-5859-0141" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High contrast imaging with an arbitrary aperture: active correction of aperture discontinuities: fundamental limits and practical trade-offs", "ispublished": "unpub", "full_text_status": "public", "keywords": "planetary systems - techniques: coronagraphy, wavefront control", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis material is partially based upon work supported by the National Aeronautics and Space Administration under Grant NNX12AG05G issued through the Astrophysics Research and Analysis (APRA) program. This work was performed in part under contract with the California Institute of Technology funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. This material is also partially based upon work carried out under subcontract 1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 914321.pdf
", "abstract": "We present a new method to achieve high-contrast images using segmented and/or on-axis telescopes. Our approach relies on using two sequential Deformable Mirrors to compensate for the large amplitude excursions in the telescope aperture due to secondary support structures and / or segment gaps. We solve the highly non-linear Monge-Ampere equation that is the fundamental equation describing the physics of phase induced amplitude modulation. We determine the optimum configuration for our two sequential Deformable Mirror system and show that high-throughput and high contrast solutions can be achieved using realistic surface deformations that are accessible using existing technologies. We name this process Active Compensation of Aperture Discontinuities (ACAD). We show that for geometries similar to JWST, ACAD can attain at least 10-7 in contrast and an order of magnitude higher for future Extremely Large Telescopes, even when the pupil features a \"missing segment\" . Because the converging non-linear mappings resulting from our Deformable Mirror shapes damps near-field diffraction artifacts in the vicinity of the discontinuities this solution is particularly appealing in terms of spectral bandwidth. We present preliminary results that illustrate the performances of ACAD in the presence of diffraction for apertures for with secondary support structures of varying width and argue that the ultimate contrast achieved can by combining ACAD with modern wavefront control algorithms.", "date": "2014-08-28", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914321", "id_number": "CaltechAUTHORS:20180615-163734593", "isbn": "9780819496119", "book_title": "Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-163734593", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX12AG05G" }, { "agency": "NASA Sagan Fellowship" }, { "agency": "NASA/JPL/Caltech", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Hoawrd-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056925", "primary_object": { "basename": "914321.pdf", "url": "https://authors.library.caltech.edu/records/g3bxp-x3925/files/914321.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Pueyo, Laurent; Norman, Colin; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tpsn4-skp04", "eprint_id": 57717, "eprint_status": "archive", "datestamp": "2023-08-20 02:39:43", "lastmod": "2024-01-13 16:18:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Bradly-Colin", "name": { "family": "Bradley", "given": "Colin" } }, { "id": "Pazder-John", "name": { "family": "Pazder", "given": "John" } }, { "id": "Nash-Reston", "name": { "family": "Nash", "given": "Reston" } }, { "id": "Metchev-Stanimir", "name": { "family": "Metchev", "given": "Stanimir" }, "orcid": "0000-0003-3050-8203" }, { "id": "Grandmont-Fr\u00e9d\u00e9ric", "name": { "family": "Grandmont", "given": "Fr\u00e9d\u00e9ric" } }, { "id": "Maire-Anne-Lise", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "Belikov-Ruslan", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Macintosh-Bruce-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Currie-Thayne", "name": { "family": "Currie", "given": "Thayne" }, "orcid": "0000-0002-7405-3119" }, { "id": "Galicher-Rapha\u00ebl", "name": { "family": "Galicher", "given": "Rapha\u00ebl" } }, { "id": "Marchis-Franck", "name": { "family": "Marchis", "given": "Franck" }, "orcid": "0000-0001-7016-7277" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-Eugene", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Steinbring-Erin", "name": { "family": "Steinbring", "given": "Eric" } } ] }, "title": "MAPLE: Reflected Light from Exoplanets with a 50-cm Diameter Stratospheric Balloon Telescope", "ispublished": "unpub", "full_text_status": "public", "keywords": "Planetary Systems, Exoplanets, High-Contrast Imaging, Reflected Light, Space Observatory, Wavefront Control, Coronagraph", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 396365.pdf
", "abstract": "Detecting light reflected from exoplanets by direct imaging is the next major milestone in the search for, and characterization of, an Earth twin. Due to the high-risk and cost associated with satellites and limitations imposed by the atmosphere for ground-based instruments, we propose a bottom-up approach to reach that ultimate goal with an endeavor named MAPLE. MAPLE first project is a stratospheric balloon experiment called MAPLE-50. MAPLE-50 consists of a 50 cm diameter off-axis telescope working in the near-UV. The advantages of the near-UV are a small inner working angle and an improved contrast for blue planets. Along with the sophisticated tracking system to mitigate balloon pointing errors, MAPLE-50 will have a deformable mirror, a vortex coronograph, and a self-coherent camera as a focal plane wavefront-sensor which employs an Electron Multiplying CCD (EMCCD) as the science detector. The EMCCD will allow photon counting at kHz rates, thereby closely tracking telescope and instrument-bench-induced aberrations as they evolve with time. In addition, the EMCCD will acquire the science data with almost no read noise penalty. To mitigate risk and lower costs, MAPLE-50 will at first have a single optical channel with a minimum of moving parts. The goal is to reach a few times 109 contrast in 25 h worth of flying time, allowing direct detection of Jovians around the nearest stars. Once the 50 cm infrastructure has been validated, the telescope diameter will then be increased to a 1.5 m diameter (MAPLE-150) to reach 1010 contrast and have the capability to image another Earth.", "date": "2014-08-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91432R", "id_number": "CaltechAUTHORS:20150520-134448057", "isbn": "9780819496119", "book_title": "Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-134448057", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "corp_creators": { "items": [ "MAPLE science team" ] }, "doi": "10.1117/12.2056747", "primary_object": { "basename": "396365.pdf", "url": "https://authors.library.caltech.edu/records/tpsn4-skp04/files/396365.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Marois, Christian; Bradley, Colin; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/908wy-pj632", "eprint_id": 57740, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:19", "lastmod": "2024-01-13 16:19:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "de-Boer-J", "name": { "family": "de Boer", "given": "Joshua" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "Christoph U." } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" } ] }, "title": "Characterizing Instrumental Effects on Polarization at a Nasmyth focus using NaCo", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumental polarization, crosstalk, calibration scheme, polarimetric differential imaging, high contrast imaging, NAOS-COKICA, SPHERE/ZIJVIPOL, SPHERE/IRDIS", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 28 July 2014.\n\nJdB acknowledges ESO for its support provided with the studentship program. We furthermore thank ESO staff\nof the Paranal Observatory for their support during the observations, especially Fernando Salgado.\n\nPublished - 396372.pdf
", "abstract": "We propose a new calibration scheme to determine the instrumental polarization (IP) and crosstalk induced by either the telescope or an instrument at Nasmyth focus. We measure the polarized blue sky at zenith with VLT/UT4/NaCo for different NaCo derotator and telescope azimuth angles. Taking multiple measurements after rotating both the instrument and the telescope with angles of 90\u00b0 allows use to determine the IP and most crosstalk components separately for the telescope and the instrument. This separation of the Mueller matrices of UT4 and the NaCo is especially important for measurements taken in the conventional polarimetric mode (field stabilized), because the rotation of the instrument with respect to M3 causes a variation in the IP and crosstalk throughout the measurement. The technique allows us to determine the IP with an accuracy of 0.4%, and constrain or determine lower or upper limits for most crosstalk components. Most notably, the UT4 U \u2192 V crosstalk is substantially larger than theory predicts. An angular offset in NaCo's half wave plate orientation is a possible source of systematic errors. We measure this offset to be 1.8\u00b0 \u00b1 0.5\u00b0.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914787", "id_number": "CaltechAUTHORS:20150521-121335028", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-121335028", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2054970", "primary_object": { "basename": "396372.pdf", "url": "https://authors.library.caltech.edu/records/908wy-pj632/files/396372.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "de Boer, Joshua; Girard, Julien H.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mv2qw-c9h22", "eprint_id": 57681, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:09", "lastmod": "2024-01-13 16:18:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A\u0457ssa" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Vargas-Catalan-E", "name": { "family": "Vargas Catalan", "given": "Ernesto" } } ] }, "title": "Mid-IR AGPMs for ELT applications", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets detection, Mid-IR, Vector Vortex Corona.graphs, E-ELT / METIS instrument", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396360.pdf
", "abstract": "The mid-infrared region is well suited for exoplanet detection thanks to the reduced contrast between the planet and its host star with respect to the visible and near-infrared wavelength regimes. This contrast may be further improved with Vector Vortex Coronagraphs (VVCs), which allow us to cancel the starlight. One flavour of the VVC is the AGPM (Annular Groove Phase Mask), which adds the interesting properties of subwavelength gratings (achromaticity, robustness) to the already known properties of the VVC. In this paper, we present the optimized designs, as well as the expected performances of mid-IR AGPMs etched onto synthetic diamond substrates, which are considered for the E-ELT/METIS instrument.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914799", "id_number": "CaltechAUTHORS:20150520-074114061", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-074114061", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique" } ] }, "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2056280", "primary_object": { "basename": "396360.pdf", "url": "https://authors.library.caltech.edu/records/mv2qw-c9h22/files/396360.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Carlomagno, Brunella; Delacroix, Christian; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/7dyqq-5c998", "eprint_id": 57737, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:14", "lastmod": "2024-01-13 16:19:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Vargas-E", "name": { "family": "Vargas", "given": "Ernesto" } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" } ] }, "title": "Realizing the diamond annular groove phase masks for the mid infrared region - five years of successful process development of diamond plasma etching", "ispublished": "unpub", "full_text_status": "public", "keywords": "Gratings, diamond, coronagraphy, microfabrication", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions. O.A. is a Research Associate of the F.R.S.-FNRS (Belgium).\n\nPublished - 396369.pdf
", "abstract": "The Annular Groove Phase Mask (AGPM) is a circularly symmetric half wave plate consisting of a circular high aspect ratio sub-wavelength grating. Here we present a method for realizing such structures in diamond. To improve the AGPM performance, antireflective sub-wavelength gratings are etched on the backside of the components, and such gratings are also discussed. Components for the N-band (around 10 \u03bcm) and the L-band (around 3.8 \u03bcm) have been successfully fabricated. We are currently developing the process further to improve the precision of the gratings and produce an AGPM for the K-band (around 2.2 \u03bcm).", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 915119", "id_number": "CaltechAUTHORS:20150521-103828598", "isbn": "9780819496195", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-103828598", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u00f3n" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } } ] }, "doi": "10.1117/12.2055475", "primary_object": { "basename": "396369.pdf", "url": "https://authors.library.caltech.edu/records/7dyqq-5c998/files/396369.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Forsberg, Pontus; Vargas, Ernesto; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/m4w6r-vs570", "eprint_id": 57680, "eprint_status": "archive", "datestamp": "2023-08-20 02:27:04", "lastmod": "2024-01-13 16:18:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Three possible types of coronagraphs for the E-ELT PCS instrument", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, coronagraphy, exoplanets, apodization", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 7 August 2014.\n\nPublished - 396359.pdf
", "abstract": "The spectral characterization in the near infrared of Neptune-like planets and super-Earths is one of the main science objectives of the E-ELT. The planetary camera and spectrograph (PCS) will be in charge of making it possible. We have designed three different instruments: pure apodizers, apodized Lyot coronagraphs, and apodized vortex coronagraphs. In each cases the central obscuration and the secondary supports are taken into account in the design of the apodizer. We present a trade study of the imaging performance of these coronagraphs, and we describe how sensitive these coronagraphs are to various aberrations. This is used to assess the potential complementarity between these three types of instruments. Finally, we also consider the feasibility of an active control of aperture discontinuities and/or a phase induced amplitude apodization using the two deformable mirrors of an extreme adaptive optics system associated with the coronagraphs.", "date": "2014-08-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91479D", "id_number": "CaltechAUTHORS:20150520-071815376", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-071815376", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2056842", "primary_object": { "basename": "396359.pdf", "url": "https://authors.library.caltech.edu/records/m4w6r-vs570/files/396359.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Carlotti, Alexis; N'Diaye, Mamadou; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/y744j-zk875", "eprint_id": 57674, "eprint_status": "archive", "datestamp": "2023-08-20 02:26:00", "lastmod": "2024-01-13 16:18:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Otten-G", "name": { "family": "Otten", "given": "Gilles" } }, { "id": "Kenworthy-M", "name": { "family": "Kenworthy", "given": "Matthew" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Escuti-M", "name": { "family": "Escuti", "given": "Michael" } } ] }, "title": "Combining vector-phase coronagraphy with dual-beam polarimetry", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, polarimetry, vector phase, high-contrast imaging", "note": "\u00a9 2014 SPIE.\n\nPublished - 396362.pdf
", "abstract": "Utilizing the so-called vector phase of polarized light, both focal-plane coronagraphs (e.g. the Vector Vortex Coronagraph) and pupil-plane coronagraphs (e.g. the vector Apodizing Phase Plate) are powerful components for high-contrast imaging. These coronagraphs can be built and optimized with polarization techniques and liquid crystal technology, that enable patterning at the micron level and furnish broad-band performance. The contrast between the residual starlight and the (polarized) reflected light off exoplanets can be further bridged by incorporating sensitive, dual-beam imaging polarimetry. As vector-phase coronagraphs use polarizers to enhance their performance, we introduce optimally integrated solutions that combine advanced coronagraphy and polarimetry. For both the VVC and the vAPP we present polarization beam-splitting concepts, with polarization analyzers either behind or in front of the coronagraphic optics. We discuss design solutions for the implementation of polarization optics, and set the stage for a trade-off between the improvement of coronagraphic and polarimetric performance and the ensuing degradation on the high-contrast imaging performance due to wavefront errors.", "date": "2014-08-06", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91477U", "id_number": "CaltechAUTHORS:20150519-145718105", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-145718105", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055452", "primary_object": { "basename": "396362.pdf", "url": "https://authors.library.caltech.edu/records/y744j-zk875/files/396362.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Snik, Frans; Otten, Gilles; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bg2gt-qan09", "eprint_id": 57741, "eprint_status": "archive", "datestamp": "2023-08-20 02:03:02", "lastmod": "2024-01-13 16:19:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans U." } }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Di-Lieto-N", "name": { "family": "Di Lieto", "given": "Nicola" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Duhoux-P", "name": { "family": "Duhoux", "given": "Philippe" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Heikamp-S", "name": { "family": "Heikamp", "given": "Stefanie" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Gerd-J", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Momany-Y", "name": { "family": "Momany", "given": "Yazan" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Sandrock-S", "name": { "family": "Sandrock", "given": "Stefan" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Ancker-M", "name": { "family": "van den Ancker", "given": "Mario" } }, { "id": "Valdes-G", "name": { "family": "Valdes", "given": "Guillermo" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } }, { "id": "Weilenmann-U", "name": { "family": "Weilenmann", "given": "Ueli" } } ] }, "title": "VISIR Upgrade Overview and Status", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, upgrade, ESO VLT, mid-IR, AQUARIUS, excess low frequency noise, chopping, water vapour", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper published July 31, 2014.\n\nPublished - 396373.pdf
", "abstract": "We present an overview of the VISIR upgrade project. VISIR is the mid-infrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan is based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As AQUARIUS detector array (Raytheon) which has been carefully characterized in ESO's IR detector test facility (modified TIMMI 2 instrument). A prism spectroscopic mode will cover the N-band in a single observation. New scientific capabilities for high resolution and high-contrast imaging will be offered by sub-aperture mask (SAM) and phase-mask coronagraphic (4QPM/AGPM) modes. In order to make optimal use of favourable atmospheric conditions a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a user-defined constraint on water vapour. During the commissioning in 2012 it was found that the on-sky sensitivity of the AQUARIUS detector was significantly below expectations and that VISIR was not ready to go back to science operations. Extensive testing of the detector arrays in the laboratory and on-sky enabled us to diagnose the cause for the shortcoming of the detector as excess low frequency noise (ELFN). It is inherent to the design chosen for this detector and can't be remedied by changing the detector set-up. Since this is a form of correlated noise its impact can be limited by modulating the scene recorded by the detector. We have studied several mitigation options and found that faster chopping using the secondary mirror (M2) of the VLT offers the most promising way forward. Faster M2 chopping has been tested and is scheduled for implementation before the end of 2014 after which we plan to re-commission VISIR. In addition an upgrade of the IT infrastructure related to VISIR is planned in order to support burst-mode operations. The upgraded VISIR will be a powerful instrument providing close to background limited performance for diffraction-limited observations at an 8-m telescope. It will offer synergy with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey work (e.g. VISTA, WISE). In addition it will bring confirmation of the technical readiness and scientific value of several aspects of potential mid-IR instrumentation at Extremely Large Telescopes.", "date": "2014-07-31", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91470C", "id_number": "CaltechAUTHORS:20150521-122919960", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-122919960", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055172", "primary_object": { "basename": "396373.pdf", "url": "https://authors.library.caltech.edu/records/bg2gt-qan09/files/396373.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Kerber, Florian; K\u00e4ufl, Hans U.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h5zar-q3847", "eprint_id": 57736, "eprint_status": "archive", "datestamp": "2023-08-20 01:53:51", "lastmod": "2024-01-13 16:19:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Jolivet-A", "name": { "family": "Jolivet", "given": "A." } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "P." } }, { "id": "Huby-Elsa", "name": { "family": "Huby", "given": "E." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "The VORTEX coronagraphic test bench", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 18 July 2014.\n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396368.pdf
", "abstract": "In this paper, we present the infrared coronagraphic test bench of the University of Li\u00e8ge named VODCA (Vortex Optical Demonstrator for Coronagraphic Applications). The goal of the bench is to assess the performances of the Annular Groove Phase Masks (AGPMs) at near- to mid-infrared wavelengths. The AGPM is a subwavelength grating vortex coronagraph of charge two (SGVC2) made out of diamond. The bench is designed to be completely achromatic and will be composed of a super continuum laser source emitting in the near to mid-infrared, several parabolas, diaphragms and an infrared camera. This way, we will be able to test the different AGPMs in the M, L, K and H bands. Eventually, the bench will also allow the computation of the incident wavefront aberrations on the coronagraph. A reflective Lyot stop will send most of the stellar light to a second camera to perform low-order wavefront sensing. This second system coupled with a deformable mirror will allow the correction of the wavefront aberrations. We also aim to test other pre- and/or post-coronagraphic concepts such as optimal apodization.", "date": "2014-07-18", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91515P", "id_number": "CaltechAUTHORS:20150521-101318318", "isbn": "9780819496195", "book_title": "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-101318318", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u03ccn" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Barto-A-A", "name": { "family": "Barto", "given": "Allison A." } } ] }, "doi": "10.1117/12.2055791", "primary_object": { "basename": "396368.pdf", "url": "https://authors.library.caltech.edu/records/h5zar-q3847/files/396368.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Jolivet, A.; Piron, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8ce7k-1e107", "eprint_id": 57684, "eprint_status": "archive", "datestamp": "2023-08-20 01:48:31", "lastmod": "2024-01-13 16:18:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Carlomagno-B", "name": { "family": "Carlomagno", "given": "Brunella" } }, { "id": "Piron-P", "name": { "family": "Piron", "given": "Pierre" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Development of a subwavelength grating vortex coronagraph of topological charge 4 (SGVC4)", "ispublished": "unpub", "full_text_status": "public", "keywords": "extrasolar planet, vector vortex coronagraphy, phase mask, subwavelength grating, high contrast imaging, small inner working angle", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n.337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - 396361.pdf
Submitted - 1412.0384.pdf
", "abstract": "One possible solution to achieve high contrast direct imaging at a small inner working angle (IWA) is to use a vector vortex coronagraph (VVC), which provides a continuous helical phase ramp in the focal plane of the telescope with a phase singularity in its center. Such an optical vortex is characterized by its topological charge, i.e., the number of times the phase accumulates 2\u03c0 radians along a closed path surrounding the singularity. Over the past few years, we have been developing a charge-2 VVC induced by rotationally symmetric subwavelength gratings (SGVC2), also known as the Annular Groove Phase Mask (AGPM). Since 2013, several SGVC2s (or AGPMs) were manufactured using synthetic diamond substrate, then validated on dedicated optical benches, and installed on 10-m class telescopes. Increasing the topological charge seems however mandatory for cancelling the light of bright stars which will be partially resolved by future Extremely Large Telescopes in the near-infrared. In this paper, we first detail our motivations for developing an SGVC4 (charge 4) dedicated to the near-infrared domain. The challenge lies in the design of the pattern which is unrealistic in the theoretically perfect case, due to state-of-the-art manufacturing limitations. Hence, we propose a new realistic design of SGVC4 with minimized discontinuities and optimized phase ramp, showing conclusive improvements over previous works in this field. A preliminary validation of our concept is given based on RCWA simulations, while full 3D finite-difference time-domain simulations (and eventually laboratory tests) will be required for a final validation.", "date": "2014-07-08", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 91478Y", "id_number": "CaltechAUTHORS:20150520-081847128", "isbn": "9780819496157", "book_title": "Ground-based and Airborne Instrumentation for Astronomy V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-081847128", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.2055798", "primary_object": { "basename": "1412.0384.pdf", "url": "https://authors.library.caltech.edu/records/8ce7k-1e107/files/1412.0384.pdf" }, "related_objects": [ { "basename": "396361.pdf", "url": "https://authors.library.caltech.edu/records/8ce7k-1e107/files/396361.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Delacroix, Christian; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pb04k-m9v93", "eprint_id": 57723, "eprint_status": "archive", "datestamp": "2023-08-20 01:30:48", "lastmod": "2024-01-13 16:19:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fogarty-Kevin", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Optimal apodizations for on-axis vector vortex coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Vector Vortex Coronagraph, On-Axis Telescopes, PIAA, Earthlike Exoplanet Imaging", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). August 2, 2014.\n\nThis work was carried out in part for the Fourier Optics course (AS.171.755), and I am grateful for the guidance of course instructors Ron Allen and Anand Sivaramakrishnan. This material is also partially based upon work carried out under subcontract 1496556 with the Jet Propulsion Laboratory funded by NASA and administered by the California Institute of Technology.\n\nPublished - 396366.pdf
", "abstract": "Imaging planets requires instruments capable of dealing with extreme contrast ratios and that have a high resolution. Coronagraphs that can reach a contrast ratio in a neighborhood of 10^9 will be capable of observing Jupiter-like planets, while those with a contrast greater than a benchmark number of 10^(10) to within a few \u03bb/D of an on-axis star will render possible imaging of Earth-like planets. Plans for achieving this feat have been developed for use on telescopes with unobscured, circularly symmetric apertures. However; given that the next generation of large telescopes are on-axis designs with support structures in the telescope aperture and a central obstruction due to the secondary mirror, it has proven necessary to develop coronagraphic techniques that compensate for obstructions. Pueyo and Norman (2012) present a possible solution to the problem of the support structures using ACAD. In this paper, we present a coronagraphic design that uses a vector vortex and pupil apodization to compensate for the secondary mirror that could possibly be used in conjunction with a wavefront control system and/or ACAD. This coronagraph is capable of achieving a contrast ratio of at least 10^(10) in a working angle of (1:5 - 30) \u03bb/D in conjunction with an on-axis telescope. We can construct our pupil using a classical transmissive apodizer or pupil remapping. We find that the mirror shapes required are relatively simple (requiring \u2264 40 degrees of freedom to describe) and we expect they will be feasible to manufacture, and potentially even to implement with deformable mirrors. By combining existing high-contrast imaging techniques, we demonstrate that a relatively simple design may be used to image exo-Earths.", "date": "2014-06-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "id_number": "CaltechAUTHORS:20150520-151205215", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-151205215", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fourier Optics course (AS.171.755)" }, { "agency": "NASA/JPL", "grant_number": "1496556" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056760", "primary_object": { "basename": "396366.pdf", "url": "https://authors.library.caltech.edu/records/pb04k-m9v93/files/396366.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Fogarty, Kevin; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/aeck3-32681", "eprint_id": 57780, "eprint_status": "archive", "datestamp": "2023-08-22 12:51:47", "lastmod": "2023-10-23 17:44:56", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "A." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Apodized phase mask coronagraphs for arbitrary apertures II. Comprehensive review of solutions for the vortex coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; techniques: high angular resolution; methods: analytical; methods: numerical", "note": "\u00a9 2014 ESO.\n\nArticle published by EDP Sciences.\n\nReceived 16 December 2013; Accepted 7 April 2014.\n\nPublished - aa23258-13.pdf
Submitted - 1404.2845v1.pdf
", "abstract": "Context. With a clear circular aperture, the vortex coronagraph perfectly cancels an on-axis point source and offers a 0.9 or 1.75\u03bb/D inner working angle for topological charge 2 or 4, respectively. Current and near-future large telescopes are on-axis, however, and the diffraction effects of the central obscuration, and the secondary supports are strong enough to prevent the detection of companions 10^(-3)\u201310^(-5) as bright as, or fainter than, their host star.\nAims. Recent advances show that a ring apodizer can restore the performance of this coronagraph by compensating for the diffraction effects of a circular central obscuration in a 1D modeling of the pupil. Our aim is to extend this work and design optimal apodizers for arbitrary apertures in 2D in order to tackle the diffraction effects of the spiders and other noncircular artifacts in the pupil.\nMethods. We fold this analytical result into a numerical optimization scheme that yields hybrid coronagraph designs that combine the advantages of the vortex coronagraph (small in IWA) and of shaped pupils coronagraphs (robustness to central obscuration and pupil asymmetric structures). The transmission of the apodizer is maximized, while constraints are set on the extremum values of the electric field that is computed in chosen regions of the Lyot plane through closed form expressions derived even for topological charges. Optimal apodizers are computed for topological charges 2 and 4 vortex coronagraphs and for telescope apertures with 10\u201330% central obscurations and 0%, 0.5%, and 1% thick spiders. \nResults. We put the results of our numerical optimizations in perspective with the analytical solutions and show that our apodizations converge to the ring apodizations. We then characterize the impacts of the obscuration ratio and the thickness of the spiders on the throughput and the IWA. For the apodized charge-2 vortex coronagraph the throughputs are slightly below those of the ring apodized vortex coronagraph, and the inner working angle is mostly unaffected by the apodization. The throughputs of the apodizers for the charge-4 vortex coronagraph are higher than those of the ring apodized vortex coronagraph. This effect increases with the obscuration ratio, though the inner working angle does, too, and it ranges between 2 and 3\u03bb/D. \nConclusions. The results presented in this paper show that high contrast at small inner working angles can be obtained with a vortex coronagraph for on-axis telescopes, in spite of the presence of a secondary mirror and its secondary support structures.", "date": "2014-06", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "566", "publisher": "EDP Sciences", "pagerange": "Art. No. A31", "id_number": "CaltechAUTHORS:20150522-115713650", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-115713650", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/0004-6361/201323258", "primary_object": { "basename": "1404.2845v1.pdf", "url": "https://authors.library.caltech.edu/records/aeck3-32681/files/1404.2845v1.pdf" }, "related_objects": [ { "basename": "aa23258-13.pdf", "url": "https://authors.library.caltech.edu/records/aeck3-32681/files/aa23258-13.pdf" } ], "resource_type": "article", "pub_year": "2014", "author_list": "Carlotti, A.; Pueyo, L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6k3ae-g5884", "eprint_id": 57732, "eprint_status": "archive", "datestamp": "2023-08-22 12:51:41", "lastmod": "2023-10-23 17:42:35", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } } ] }, "title": "Very deep images of the innermost regions of the \u03b2 Pictoris debris disc at L\u2032", "ispublished": "pub", "full_text_status": "public", "keywords": "techniques: high angular resolution; planets and satellites: individual: \u03b2 Pictoris b; stars: individual: \u03b2 Pictoris; planetary systems", "note": "\u00a9 2014 ESO.\n\nReceived: 25 November 2013; accepted: 24 April 2014.\n\nWe would like to thank the referee Dr. A. Brandecker for his constructive comments that helped to significantly improve the quality of the article. J.M. acknowledges financial support from the ESO studentship program and the Labex OSUG 2020 and O.A. acknowledges financial support from a FNRS Research Associate during part of this work. Last, the research leading to these results also received funding from the European Research Council under\nthe European Union's Seventh Framework Programme (ERC Grant Agreement No. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Actions.\n\nPublished - aa23130-13.pdf
", "abstract": "Context. Very few debris discs have been imaged in scattered light at wavelengths beyond 3 \u03bcm because the thermal emission from both the sky and the telescope is generally too strong with respect to the faint emission of a debris disc. We present here the first analysis of a high angular resolution image of the disc of \u03b2 Pictoris at 3.8 \u03bcm.\n\nAims. Our primary objective is to probe the innermost parts of the \u03b2 Pictoris debris disc and describe its morphology. We performed extensive forward modelling to correct for the biases induced by angular differential imaging on extended objects and derive the physical parameters of the disc.\n\nMethods. This work relies on a new analysis of seven archival data sets of \u03b2 Pictoris observed with the NaCo instrument at the Very Large Telescope in the L\u2032 band, including observations made with the Annular Groove Phase Mask vortex coronagraph in 2013. The data analysis consists of angular differential imaging associated with disc forward modelling to correct for the biases induced by that technique. The disc model is subtracted from the data and the reduction performed again in order to minimize the residuals in the final image.\n\nResults. The disc is detected above a 5\u03c3 level between 0.4\u2032\u2032 and 3.8\u2032\u2032. The two extensions have a similar brightness within error bars. We confirm an asymmetry previously observed at larger distances from the star and at shorter wavelengths: the isophotes are more widely spaced on the north-west side (above the disc apparent midplane) than on the south-east side. This is interpreted as a small inclination of the disc combined with anisotropic scattering. Our best-fit model has an inclination of 86\u00b0 with an anisotropic Henyey-Greenstein coefficient of 0.36. This interpretation is supported by a new asymmetry detected in the disc: the disc is significantly bowed towards the north-west within 3\u2033 (above the apparent midplane). We also detect a possible new asymmetry within 1\u2033, but at this stage we cannot discern between a real feature and an underlying speckle.", "date": "2014-06", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "566", "publisher": "EDP Sciences", "pagerange": "Art. No. A91", "id_number": "CaltechAUTHORS:20150521-095045983", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-095045983", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "Labex OSUG 2020" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" } ] }, "doi": "10.1051/0004-6361/201323130", "primary_object": { "basename": "aa23130-13.pdf", "url": "https://authors.library.caltech.edu/records/6k3ae-g5884/files/aa23130-13.pdf" }, "resource_type": "article", "pub_year": "2014", "author_list": "Milli, J.; Lagrange, A.-M.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dag3p-8t273", "eprint_id": 87178, "eprint_status": "archive", "datestamp": "2023-08-20 01:00:15", "lastmod": "2023-10-18 20:55:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Snik-F", "name": { "family": "Snik", "given": "Frans" } }, { "id": "Craven-Jones-J", "name": { "family": "Craven-Jones", "given": "Julia" } }, { "id": "Escuti-M", "name": { "family": "Escuti", "given": "Michael" } }, { "id": "Fineschi-S", "name": { "family": "Fineschi", "given": "Silvano" } }, { "id": "Harrington-D", "name": { "family": "Harrington", "given": "David" } }, { "id": "De-Martino-A", "name": { "family": "De Martino", "given": "Antonello" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riedi-J", "name": { "family": "Riedi", "given": "J\u00e9r\u00f4me" } }, { "id": "Tyo-J-S", "name": { "family": "Tyo", "given": "J. Scott" } } ] }, "title": "An overview of polarimetric sensing techniques and technology with applications to different research fields", "ispublished": "unpub", "full_text_status": "public", "keywords": "polarimetry", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe authors thank all the participants for their invaluable contributions to the workshop and to this publication. We thank the Lorentz Center and its staff for providing the ideal platform for our workshop, and for funding. We we thank the COST network MP1104 \"Polarisation as a tool to study the solar system and beyond\" for funding and for the initial ideas for organizing this multidisciplinary workshop.\n\nPublished - 90990B.pdf
", "abstract": "We report the main conclusions from an interactive, multidisciplinary workshop on \"Polarimetric Techniques and Technology\", held on March 24-28 2014 at the Lorentz Center in Leiden, the Netherlands. The work- shop brought together polarimetrists from different research fields. Participants had backgrounds ranging from academia to industrial RD. Here we provide an overview of polarimetric instrumentation in the optical regime geared towards a wide range of applications: atmospheric remote sensing, target detection, astronomy, biomedical applications, etc. We identify common approaches and challenges. We list novel polarimetric techniques and polarization technologies that enable promising new solutions. We conclude with recommendations to the polarimetric community at large on joint efforts for exchanging expertise.", "date": "2014-05-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 90990B", "id_number": "CaltechAUTHORS:20180615-164656884", "isbn": "9781628410365", "book_title": "Polarization: Measurement, Analysis, and Remote Sensing XI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180615-164656884", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "COST", "grant_number": "MP1104" } ] }, "contributors": { "items": [ { "id": "Chenault-D-B", "name": { "family": "Chenault", "given": "David B." } }, { "id": "Goldstein-D-H", "name": { "family": "Goldstein", "given": "Dennis H." } } ] }, "doi": "10.1117/12.2053245", "primary_object": { "basename": "90990B.pdf", "url": "https://authors.library.caltech.edu/records/dag3p-8t273/files/90990B.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Snik, Frans; Craven-Jones, Julia; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nt0kh-jtg26", "eprint_id": 87197, "eprint_status": "archive", "datestamp": "2023-08-20 01:00:20", "lastmod": "2024-01-14 20:15:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Piron-Pierre", "name": { "family": "Piron", "given": "P." } }, { "id": "Blain-Pascal", "name": { "family": "Blain", "given": "P." } }, { "id": "D\u00e9cultot-Marc", "name": { "family": "D\u00e9cultot", "given": "M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "First prototypes of vortex retarders obtained by polarization holography", "ispublished": "unpub", "full_text_status": "public", "keywords": "Polarization, Holography, Liquid Crystal Polymers, Vectorial vortex", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThe author was funded by the \" Fond pour la formation \u00e0 la Recherche dans l'Industrie et l'Agriculture\" (FRIA). The author would like to thanks Lo\u00efc Lichawski for his help during his work.\n\nPublished - 909911.pdf
", "abstract": "This paper will present the first prototypes of vortex retarders made of photo-orientable liquid crystals polymers recorded without mechanical action using only polarization holography. Vortex retarders are birefringent plates characterized by a uniform phase retard and a rotation of their fast axis along their center. Liquid crystals are anisotropic molecules possessing birefringent properties. They are locally orientable and their orientation defines the fast axis orientation of the retarder. Their alignment depends on the local orientation of the recording electric field. The superimposition of several polarized beams will be used to shape the electric field to achieve the recording of vortex retarders. The mathematical aspects of the superimposition process, as well as several numerical simulations are exposed. Finally, the first prototypes are presented, characterized and compared to the numerical simulations.", "date": "2014-05-21", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 909911", "id_number": "CaltechAUTHORS:20180618-141806560", "isbn": "9781628410365", "book_title": "Polarization: Measurement, Analysis, and Remote Sensing XI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-141806560", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" } ] }, "contributors": { "items": [ { "id": "Chenault-D-B", "name": { "family": "Chenault", "given": "David B." } }, { "id": "Goldstein-D-H", "name": { "family": "Goldstein", "given": "Dennis H." } } ] }, "doi": "10.1117/12.2052830", "primary_object": { "basename": "909911.pdf", "url": "https://authors.library.caltech.edu/records/nt0kh-jtg26/files/909911.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Piron, P.; Blain, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mm2j9-58y97", "eprint_id": 57885, "eprint_status": "archive", "datestamp": "2023-08-20 00:29:41", "lastmod": "2024-01-13 16:20:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Maire-A-L", "name": { "family": "Maire", "given": "Anne-Lise" }, "orcid": "0000-0002-2591-4138" }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "Rapha\u00ebl" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Schneider-J", "name": { "family": "Schneider", "given": "Jean" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wes" } }, { "id": "Stam-D-M", "name": { "family": "Stam", "given": "Daphne" } }, { "id": "Lagage-P-O", "name": { "family": "Lagage", "given": "Pierre-Olivier" } }, { "id": "Gratton-R", "name": { "family": "Gratton", "given": "Raffaele" } } ] }, "title": "SPICES: A Mission Concept to Characterize Long Period Planets from Giants to Super-Earths", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution, planetary systems", "note": "\u00a9 2014 International Astronomical Union.\n\nPublished - S1743921313013331a.pdf
", "abstract": "SPICES (Spectro-Polarimetric Imaging and Characterization of Exoplanetary Systems) was proposed in 2010 for a five-year M-class mission in the context of ESA Cosmic Vision. Its purpose is to image and characterize long-period extrasolar planets located at several AUs (0.5-10 AU) from nearby stars (<25 pc) with masses ranging from a few Jupiter masses down to super-Earths (~2 Earth radii, ~10 M\u2295), possibly habitable. In addition, circumstellar disks as faint as a few times the zodiacal light in the Solar System can be studied. SPICES is based on a 1.5-m off-axis telescope and can perform spectro-polarimetric measurements in the visible (450 - 900 nm) at a spectral resolution of about 40. This paper summarizes the top science program and the choices made to conceive the instrument. The performance is illustrated for a few emblematic cases.", "date": "2014-04-29", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "429-434", "id_number": "CaltechAUTHORS:20150528-145630181", "isbn": "9781107033825", "book_title": "Formation, Detection, and Characterization of Extrasolar Habitable Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-145630181", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Haghighipou-N", "name": { "family": "Haghighipou", "given": "N." } } ] }, "corp_creators": { "items": [ "SPICES team" ] }, "doi": "10.1017/S1743921313013331", "primary_object": { "basename": "S1743921313013331a.pdf", "url": "https://authors.library.caltech.edu/records/mm2j9-58y97/files/S1743921313013331a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Boccaletti, Anthony; Maire, Anne-Lise; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/drcw8-1yw69", "eprint_id": 57892, "eprint_status": "archive", "datestamp": "2023-08-19 23:01:57", "lastmod": "2024-01-13 16:20:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A. M." } }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "J." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Lizon-J-L", "name": { "family": "Lizon", "given": "J.-L." } }, { "id": "Muzic-K", "name": { "family": "Muzic", "given": "K." } }, { "id": "Olivier-R", "name": { "family": "Olivier", "given": "R." } }, { "id": "Pe\u00f1a-E", "name": { "family": "Pe\u00f1a", "given": "E." } }, { "id": "Slusarenko-N", "name": { "family": "Slusarenko", "given": "N." } }, { "id": "Tacconi-Garman-L-E", "name": { "family": "Tacconi-Garman", "given": "L. E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Companion search around \u03b2 Pictoris with the newly commissioned L'-band vector vortex coronagraph on VLT/NACO", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, \u03b2 Pictoris b", "note": "\u00a9 2013 International Astronomical Union.\n\nPublished - S1743921313007825a.pdf
", "abstract": "Here we present the installation and successful commissioning of an L'-band Annular Groove Phase Mask (AGPM) coronagraph on VLT/NACO. The AGPM is a vector vortex coronagraph made from diamond subwavelength gratings tuned to the L' band. The vector vortex coronagraph enables high contrast imaging at very small inner working angle (here 0''.09, the diffraction limit of the VLT at L'), potentially being the key to a new parameter space. During technical and science verification runs, we discovered a late-type companion at two beamwidths from an F0V star (Mawet et al. 2013), and imaged the inner regions of beta Pictoris down to the previously unexplored projected radius of 1.75 AU. The circumstellar disk was also resolved from ~= 1\" to 5\" (see J. Milli et al., these proceedings). These results showcase the potential of the NACO L-band AGPM over a wide range of spatial scales.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "50-51", "id_number": "CaltechAUTHORS:20150529-071530204", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-071530204", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S1743921313007825", "primary_object": { "basename": "S1743921313007825a.pdf", "url": "https://authors.library.caltech.edu/records/drcw8-1yw69/files/S1743921313007825a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Mawet, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mznwy-w1k62", "eprint_id": 57883, "eprint_status": "archive", "datestamp": "2023-08-19 23:01:53", "lastmod": "2024-01-13 16:20:54", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Wahl-M", "name": { "family": "Wahl", "given": "Matthew" } }, { "id": "Metchev-S-A", "name": { "family": "Metchev", "given": "Stanimir" }, "orcid": "0000-0003-3050-8203" }, { "id": "Patel-R-I", "name": { "family": "Patel", "given": "Rahul" }, "orcid": "0000-0002-5025-6827" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Dekany-R-G", "name": { "family": "Dekany", "given": "Richard" } }, { "id": "Roberts-J-E", "name": { "family": "Roberts", "given": "Jennifer" } }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Bouchez-A-H", "name": { "family": "Bouchez", "given": "Antonin" } }, { "id": "Truong-Tuan", "name": { "family": "Truong", "given": "Tuan" } }, { "id": "Baranec-C", "name": { "family": "Baranec", "given": "Christoph" }, "orcid": "0000-0002-1917-9157" }, { "id": "Guiwitz-W", "name": { "family": "Guiwitz", "given": "Stephen" } }, { "id": "Hale-D", "name": { "family": "Hale", "given": "David" } }, { "id": "Angione-J", "name": { "family": "Angione", "given": "John" } }, { "id": "Trinh-Thang", "name": { "family": "Trinh", "given": "Thang" } }, { "id": "Zolkower-J", "name": { "family": "Zolkower", "given": "Jeffry" } }, { "id": "Croner-E-E", "name": { "family": "Croner", "given": "Ernest" } }, { "id": "Troy-M", "name": { "family": "Troy", "given": "Mitchell" } }, { "id": "McKenna-D", "name": { "family": "McKenna", "given": "Dan" } }, { "id": "Tesch-J-A", "name": { "family": "Tesch", "given": "Jonathan" } } ] }, "title": "Debris Disk Science with the Palomar ExAO System : First Results", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2013 International Astronomical Union.\n\nPublished - S174392131300793Xa.pdf
", "abstract": "We present first imaging results from the PALM-3000 adaptive optics system and\nPHARO camera on the Hale 5 m telescope. Observations using a vector vortex coronagraph have\ngiven us direct detections of the two-ring dusty debris system around the star HD 141569. Our\nobservations reveal the inner clearing in the disk to unprecedentedly small angular separations,\nand are the most sensitive yet at the H and K bands. We are for the first time able to measure\nand compare the colors of the scattered light in the inner and outer dust rings, and find that\nthe outer ring is significantly bluer than the inner ring.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "72-73", "id_number": "CaltechAUTHORS:20150528-144033986", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-144033986", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S174392131300793X", "primary_object": { "basename": "S174392131300793Xa.pdf", "url": "https://authors.library.caltech.edu/records/mznwy-w1k62/files/S174392131300793Xa.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Wahl, Matthew; Metchev, Stanimir; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/abjks-ga007", "eprint_id": 57893, "eprint_status": "archive", "datestamp": "2023-08-19 23:02:02", "lastmod": "2024-01-13 16:21:01", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne Marie" } }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "Jean-Charles" } } ] }, "title": "First High-Angular Resolution L' Images of the \u03b2 Pictoris Debris Disc with the VLT/NaCo", "ispublished": "unpub", "full_text_status": "public", "keywords": "stars: individual (\u03b2 Pictoris), techniques: high angular resolution, techniques: image\nprocessing", "note": "\u00a9 2013 International Astronomical Union. Published online: 06 January 2014.\n\nPublished - S1743921313008909a.pdf
", "abstract": "Imaging debris discs in the L\u2032-band (3.8 \u03bcm) is a difficult task. Quasi-static speckles from imperfect optics prevail below 1\u2033 whereas background emission is the dominant noise source beyond that separation and is much larger than at shorter wavelengths. We demonstrate here the potential of the newly commissioned AGPM coronograph on VLT/NaCo combined with advanced star and sky subtraction technique based on Principal Component Analysis, and we analyze the morphology of the \u03b2 Pictoris disc.", "date": "2014-01-06", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "350-351", "id_number": "CaltechAUTHORS:20150529-074952558", "isbn": "9781107045200", "book_title": "Exploring the Formation and Evolution of Planetary Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-074952558", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Booth-M", "name": { "family": "Booth", "given": "M." } }, { "id": "Matthews-B-C", "name": { "family": "Matthews", "given": "B. C." } }, { "id": "Graham-J-R", "name": { "family": "Graham", "given": "J. R." } } ] }, "doi": "10.1017/S1743921313008909", "primary_object": { "basename": "S1743921313008909a.pdf", "url": "https://authors.library.caltech.edu/records/abjks-ga007/files/S1743921313008909a.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Milli, Julien; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/baq32-dj970", "eprint_id": 57731, "eprint_status": "archive", "datestamp": "2023-08-22 11:20:15", "lastmod": "2023-10-23 17:42:32", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "H. M. J." } }, { "id": "Pourbaix-D", "name": { "family": "Pourbaix", "given": "D." } }, { "id": "Mu\u017eic-K", "name": { "family": "Mu\u017eic", "given": "K." } }, { "id": "Ivanov-V-D", "name": { "family": "Ivanov", "given": "V. D." } }, { "id": "Kurtev-R", "name": { "family": "Kurtev", "given": "R." } }, { "id": "Beletsky-Y", "name": { "family": "Beletsky", "given": "Y." } }, { "id": "Mehner-A", "name": { "family": "Mehner", "given": "A." }, "orcid": "0000-0002-9564-3302" }, { "id": "Berger-J-P", "name": { "family": "Berger", "given": "J. P." }, "orcid": "0000-0001-5025-0428" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57\u2013531906.1", "ispublished": "pub", "full_text_status": "public", "keywords": "binaries: visual; parallaxes; astrometry; brown dwarfs", "note": "\u00a9 2013 ESO. Article published by EDP Science.\n\nReceived 3 November 2013; accepted 4 December 2013.\n\nIt is a pleasure to thank Petro Lazorenko for useful discussions, as well as an anonymous referee for comments that improved the paper. R.K. acknowledges support from FONDECYT through grants No. 1130140.\n\nBased on data obtained with the ESO Very Large Telescope under programme 291.C-5004.\n\nPublished - aa22975-13.pdf
", "abstract": "Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the Sun. Our astrometric measurements \u2013 with a relative precision at the milli-arcsecond scale \u2013 allowed us to detect the orbital motion and derive more precisely the parallax of the system, leading to a distance of 2.020 \u00b1 0.019 pc. The relative orbital motion of the two objects is found to be perturbed, which leads us to suspect the presence of a substellar companion around one of the two components. We also performed VRIz photometry of the two components and compared this with models. We confirm the flux reversal of the T dwarf.", "date": "2014-01", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "561", "publisher": "EDP Sciences", "pagerange": "Art. No. L4", "id_number": "CaltechAUTHORS:20150521-094949966", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-094949966", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130140" } ] }, "doi": "10.1051/0004-6361/201322975", "primary_object": { "basename": "aa22975-13.pdf", "url": "https://authors.library.caltech.edu/records/baq32-dj970/files/aa22975-13.pdf" }, "resource_type": "article", "pub_year": "2014", "author_list": "Boffin, H. M. J.; Pourbaix, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/asqm2-m2f85", "eprint_id": 57705, "eprint_status": "archive", "datestamp": "2023-08-19 22:47:05", "lastmod": "2024-01-13 16:18:53", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Pueyo-Laurent", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Hagan-J-Brendan", "name": { "family": "Hagan", "given": "J. Brendan" } }, { "id": "Gofas-Salas-Elena", "name": { "family": "Gofas-Salas", "given": "Elena" } }, { "id": "Rajan-Abhijith", "name": { "family": "Rajan", "given": "Abhijith" } }, { "id": "Chen-Christine", "name": { "family": "Chen", "given": "Christine" } }, { "id": "Perrin-Marshall-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Debes-John-H", "name": { "family": "Debes", "given": "John" }, "orcid": "0000-0002-1783-8817" }, { "id": "Golimowski-David-A", "name": { "family": "Golimowski", "given": "David" } }, { "id": "Hines-Dean-C", "name": { "family": "Hines", "given": "Dean C." }, "orcid": "0000-0003-4653-6161" }, { "id": "N'Diaye-Mamadou", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Schneider-Glenn", "name": { "family": "Schneider", "given": "Glenn" }, "orcid": "0000-0002-4511-5966" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Marois-Christian", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Soummer-R\u00e9mi", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" } ] }, "title": "Archival Legacy Investigations of Circumstellar Environments: Overview and First Results", "ispublished": "unpub", "full_text_status": "public", "keywords": "HST, NICMOS, Coronagraphy, Post-processing, debris disks, exoplanets", "note": "\u00a9 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 4 September 2014.\n\nThis project was made possible by the Mikulski Archive for Space Telescopes (MAST) at STScI. Support was provided by NASA through grants HST-AR-12652.01 (PI: R. Soummer), HST-GO-11136.09-A (PI: D. Golimowski), and by STScI Director's Discretionary Research funds, from STScI, which is operated by AURA under NASA contract NAS5- 26555. The input images to ALICE processing are from the recalibrated NICMOS data products produced by the Legacy Archive project, \"A Legacy Archive PSF Library And Circumstellar Environments (LAPLACE) Investigation,\" (HST-AR- 11279, PI: G. Schneider). Pueyo was supported in part under contract with the California Institute of Technology (Caltech) funded by NASA through the Sagan Fellowship Program\nexecuted by the NASA Exoplanet Science Institute. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.\n\nPublished - 396363.pdf
Submitted - 1407.0617v1.pdf
", "abstract": "We are currently conducting a comprehensive and consistent re-processing of archival HST-NICMOS coronagraphic surveys using advanced PSF subtraction methods, entitled the Archival Legacy Investigations of Circumstellar Environments program (ALICE, HST/AR 12652). This virtual campaign of about 400 targets has already produced numerous new detections of previously unidentified point sources and circumstellar structures. We present five newly spatially resolved debris disks revealed in scattered light by our analysis of the archival data. These images provide new views of material around young solar-type stars at ages corresponding to the period of terrestrial planet formation in our solar system. We have also detected several new candidate substellar companions, for which there are ongoing followup campaigns (HST/WFC3 and VLT/SINFONI in ADI mode). Since the methods developed as part of ALICE are directly applicable to future missions (JWST, AFTA coronagraph) we emphasize the importance of devising optimal PSF subtraction methods for upcoming coronagraphic imaging missions. We describe efforts in defining direct imaging high-level science products (HLSP) standards that can be applicable to other coronagraphic campaigns, including ground-based (e.g., Gemini Planet Imager), and future space instruments (e.g., JWST). ALICE will deliver a first release of HLSPs to the community through the MAST archive at STScI in 2014.", "date": "2014", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 914357", "id_number": "CaltechAUTHORS:20150520-104945736", "isbn": "9780819496119", "book_title": "Space telescopes and instrumentation 2014 : optical, infrared and millimeter wave : 22-27 June 2014, Montreal, Canada", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-104945736", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "HST-AR-12652.01" }, { "agency": "NASA", "grant_number": "HST-GO-11136.09-A" }, { "agency": "NASA", "grant_number": "NAS5- 26555" }, { "agency": "NASA Sagan Fellowship Program" } ] }, "contributors": { "items": [ { "id": "Oschmann-Jacobus-M", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-Mark-C", "name": { "family": "Clampin", "given": "Mark" } }, { "id": "Fazio-Giovanni-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-Howard-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.2056672", "primary_object": { "basename": "1407.0617v1.pdf", "url": "https://authors.library.caltech.edu/records/asqm2-m2f85/files/1407.0617v1.pdf" }, "related_objects": [ { "basename": "396363.pdf", "url": "https://authors.library.caltech.edu/records/asqm2-m2f85/files/396363.pdf" } ], "resource_type": "book_section", "pub_year": "2014", "author_list": "Choquet, \u00c9lodie; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5v3qn-hbh93", "eprint_id": 57895, "eprint_status": "archive", "datestamp": "2023-08-19 22:47:10", "lastmod": "2023-10-23 17:51:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Marcus" } }, { "id": "Verinaud-C", "name": { "family": "Verinaud", "given": "Christophe" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Roadmap for PCS, the Planetary Camera and Spectrograph for the E-ELT", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014.\n\nPublished - fulltext_12804.pdf
", "abstract": "Presently, dedicated instruments at large telescopes (SPHERE for the VLT, GPI for Gemini) are\nabout to discover and explore self-luminous giant planets by direct imaging and spectroscopy. The next\ngeneration of 30m-40m ground-based telescopes, the Extremely Large Telescopes, have the potential to\ndramatically enlarge the discovery space towards older giant planets seen in reflected light and ultimately even a\nsmall number of rocky planets. The E-ELT Planetary Camera and Spectrograph (PCS) serves this purpose.\nBuilding on the heritage of the EPICS phase-A study, this paper presents revised requirements, a possible\nconcept, and the R&D necessary to realize the instrument.", "date": "2014", "date_type": "published", "publisher": "Red Hook, NY", "place_of_pub": "New York, NY", "id_number": "CaltechAUTHORS:20150529-094224991", "isbn": "978-88-908876-0-4", "book_title": "Adaptive Optics for Extremely Large Telescopes", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-094224991", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Luca-F", "name": { "family": "Luca", "given": "Fini" } } ] }, "doi": "10.12839/AO4ELT3.12804", "primary_object": { "basename": "fulltext_12804.pdf", "url": "https://authors.library.caltech.edu/records/5v3qn-hbh93/files/fulltext_12804.pdf" }, "resource_type": "book_section", "pub_year": "2014", "author_list": "Kasper, Marcus; Verinaud, Christophe; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2jk7m-7qg37", "eprint_id": 57832, "eprint_status": "archive", "datestamp": "2023-08-22 11:09:58", "lastmod": "2023-10-23 17:47:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rameau-J", "name": { "family": "Rameau", "given": "J." }, "orcid": "0000-0003-0029-0258" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Meshkat-T", "name": { "family": "Meshkat", "given": "T." }, "orcid": "0000-0001-6126-2467" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Quanz-S-P", "name": { "family": "Quanz", "given": "S. P." }, "orcid": "0000-0003-3829-7412" }, { "id": "Currie-T", "name": { "family": "Currie", "given": "T." }, "orcid": "0000-0002-7405-3119" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Bonnefoy-M", "name": { "family": "Bonnefoy", "given": "M." }, "orcid": "0000-0001-5579-5339" }, { "id": "Kenworthy-M-A", "name": { "family": "Kenworthy", "given": "M." }, "orcid": "0000-0002-7064-8270" } ] }, "title": "Confirmation of the Planet around HD 95086 by Direct Imaging", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics; planets and satellites: detection; stars: individual (HD 95086)", "note": "\u00a9 2013. The American Astronomical Society.\n\nReceived 2013 October 2; accepted 2013 October 24; published 2013 December 6.\n\nWe are grateful to Vanessa Bailey, Kate Su, and Amy Bonsor\nfor fruitful discussions. We thank the Director General of\nESO for discretionary time that allowed to confirm the planet.\nJ.R., G.C., and A.M.L. acknowledge financial support from the\nFrench National Research Agency (ANR) through project grant\nANR10-BLANC0504-01.\nFacility: VLT:Yepun (NaCo)\n\nPublished - apjl_779_2_26.pdf
Submitted - 1310.7483v1.pdf
", "abstract": "VLT/NaCo angular differential imaging at L' (3.8 \u03bcm) revealed a probable giant planet comoving with the young and early-type HD 95086, also known to harbor an extended debris disk. The discovery was based on the proper motion analysis of two datasets spanning 15 months. However, the second dataset suffered from bad atmospheric conditions, which limited the significance of the re-detection at the 3\u03c3 level. In this Letter, we report new VLT/NaCo observations of HD 95086 obtained on 2013 June 26 and 27 at L' to recover the planet candidate. We unambiguously re-detect the companion HD 95086 b with multiple independent pipelines at a signal-to-noise ratio greater than or equal to 5. Combined with previously reported measurements, our astrometry decisively shows that the planet is comoving with HD 95086 and inconsistent with a background object. With a revised mass of 5 \u00b1 2 Jupiter masses, estimated from its L' photometry and \"hot-start\" models at 17 \u00b1 4 Myr, HD 95086 b becomes a new benchmark for further physical and orbital characterization of young giant planets.", "date": "2013-12-20", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "779", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. L26", "id_number": "CaltechAUTHORS:20150526-162428581", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-162428581", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "ANR10-BLANC0504-01" } ] }, "doi": "10.1088/2041-8205/779/2/L26", "primary_object": { "basename": "1310.7483v1.pdf", "url": "https://authors.library.caltech.edu/records/2jk7m-7qg37/files/1310.7483v1.pdf" }, "related_objects": [ { "basename": "apjl_779_2_26.pdf", "url": "https://authors.library.caltech.edu/records/2jk7m-7qg37/files/apjl_779_2_26.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Rameau, J.; Chauvin, G.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cvn3n-4eg91", "eprint_id": 57803, "eprint_status": "archive", "datestamp": "2023-08-19 22:07:28", "lastmod": "2023-10-23 17:46:06", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "A." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } } ] }, "title": "Ring-apodized Vortex Coronagraphs for Obscured Telescopes. I. Transmissive Ring Apodizers", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 stars:\nimaging \u2013 stars: low-mass \u2013 techniques: high angular resolution \u2013 telescopes", "note": "\u00a9 2013 American Astronomical Society.\n\nReceived 2013 July 1; accepted 2013 September 5; published 2013 October 21.\n\nThis work was carried out at the European Southern\nObservatory (ESO) and at the Jet Propulsion Laboratory, California\nInstitute of Technology, under contract with the National\nAeronautics and Space Administration. This material is partially\nbased on work supported by NASA under grant NNX12AG05G\nissued through the Astrophysics Research and Analysis (APRA)\nprogram.\n\nPublished - apjs_209_1_7.pdf
Submitted - 1309.3328v1.pdf
", "abstract": "The vortex coronagraph (VC) is a new generation small inner working angle (IWA) coronagraph currently offered on various 8 m class ground-based telescopes. On these observing platforms, the current level of performance is not limited by the intrinsic properties of actual vortex devices, but by wavefront control residuals and incoherent background (e.g., thermal emission of the sky), or the light diffracted by the imprint of the secondary mirror and support structures on the telescope pupil. In the particular case of unfriendly apertures (mainly large central obscuration) when very high contrast is needed (e.g., direct imaging of older exoplanets with extremely large telescopes or space-based coronagraphs), a simple VC, like most coronagraphs, cannot deliver its nominal performance because of the contamination due to the diffraction from the obscured part of the pupil. Here, we propose a novel yet simple concept that circumvents this problem. We combine a vortex phase mask in the image plane of a high-contrast instrument with a single pupil-based amplitude ring apodizer, tailor-made to exploit the unique convolution properties of the VC at the Lyot-stop plane. We show that such a ring-apodized vortex coronagraph (RAVC) restores the perfect attenuation property of the VC regardless of the size of the central obscuration, and for any (even) topological charge of the vortex. More importantly, the RAVC maintains the IWA and conserves a fairly high throughput, which are signature properties of the VC.", "date": "2013-11", "date_type": "published", "publication": "Astrophysical Journal Supplement Series", "volume": "209", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 7", "id_number": "CaltechAUTHORS:20150526-100126063", "issn": "0067-0049", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-100126063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA", "grant_number": "NNX12AG05G" } ] }, "doi": "10.1088/0067-0049/209/1/7", "primary_object": { "basename": "apjs_209_1_7.pdf", "url": "https://authors.library.caltech.edu/records/cvn3n-4eg91/files/apjs_209_1_7.pdf" }, "related_objects": [ { "basename": "1309.3328v1.pdf", "url": "https://authors.library.caltech.edu/records/cvn3n-4eg91/files/1309.3328v1.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Mawet, D.; Pueyo, L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/xyyjb-gzk88", "eprint_id": 57749, "eprint_status": "archive", "datestamp": "2023-08-22 10:47:16", "lastmod": "2023-10-23 17:43:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Searching for companions down to 2 AU from \u03b2 Pictoris using the L\u2032-band AGPM coronagraph on VLT/NACO", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems; stars: individual: beta Pictoris; techniques: high angular resolution", "note": "\u00a9 2013 EOS.\n\nReceived 25 September 2013; Accepted 6 November 2013.\n\nThe research leading to these results has received funding from the European Research Council under the FP7 through ERC Starting Grant Agreement No. 337569, and from the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - aa22748-13.pdf
Accepted Version - 1311.4298v1.pdf
", "abstract": "Context. The orbit of the giant planet discovered around \u03b2 Pic is slightly inclined with respect to the outer parts of the debris disc, which creates a warp in the inner debris disc. This inclination might be explained by gravitational interactions with other planets.\nAims. We aim to search for additional giant planets located at smaller angular separations from the star.\nMethods. We used the new L\u2032-band AGPM coronagraph on VLT/NACO, which provides an exquisite inner working angle. A long observing sequence was obtained on \u03b2 Pic in pupil-tracking mode. To derive sensitivity limits, the collected images were processed using a principal-component analysis technique specifically tailored to angular differential imaging.\nResults. No additional planet is detected down to an angular separation of 0.''2with a sensitivity better than 5 M_(Jup). Meaningful upper limits (<10 M_(Jup)) are derived down to an angular separation of 0.''1, which corresponds to 2 AU at the distance of \u03b2 Pic.", "date": "2013-11", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "559", "publisher": "EDP Sciences", "pagerange": "Art. No. L12", "id_number": "CaltechAUTHORS:20150521-145139143", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-145139143", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Research Council (ERC)", "grant_number": "337569" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201322748", "primary_object": { "basename": "1311.4298v1.pdf", "url": "https://authors.library.caltech.edu/records/xyyjb-gzk88/files/1311.4298v1.pdf" }, "related_objects": [ { "basename": "aa22748-13.pdf", "url": "https://authors.library.caltech.edu/records/xyyjb-gzk88/files/aa22748-13.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Absil, O.; Milli, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/5dbap-0gw79", "eprint_id": 87200, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:35", "lastmod": "2024-01-14 20:15:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mardones-P", "name": { "family": "Mardones", "given": "P." } }, { "id": "Schuhler-N", "name": { "family": "Schuhler", "given": "N." } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } } ] }, "title": "Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM^2 coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, coronagraphy, polarization, high angular resolution, phase mask, adaptive optics, synchronous detection", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).\n\nPublished - 88640J.pdf
", "abstract": "We present a new Adaptive Phase Mask (APM) coronagraph design enabling Amplitude and Phase Modulation control (APM). The Adaptive Phase mask coronagraph is a technique proposed to provide both high dynamic and high angular resolution imaging of faint sources around bright objects. Discriminating faint sources from static speckles is a challenging problem. Our new system is based on synchronous demodulation that allows high dynamic range detection of a faint target immersed in a background. The APM^2 uses the coherence of speckles to discriminate them from proper companions, using the mask itself as the electric field modulator. Synchronous detection in the radio frequency range is used to side-step the effect of atmospheric turbulence and enable the detection of low amplitude signals. The APM^2 concept offers high dynamic range detection and provides a time- and cost-effective method to quantify the probability of presence of a faint object close to the central star.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640J", "id_number": "CaltechAUTHORS:20180618-144401710", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-144401710", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2026211", "primary_object": { "basename": "88640J.pdf", "url": "https://authors.library.caltech.edu/records/5dbap-0gw79/files/88640J.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Bourget, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/v8g6g-5cm94", "eprint_id": 57743, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:20", "lastmod": "2024-01-13 16:19:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "N'Diaye-M", "name": { "family": "N'Diaye", "given": "Mamadou" }, "orcid": "0000-0002-1721-3294" }, { "id": "Choquet-\u00c9lodie", "name": { "family": "Choquet", "given": "\u00c9lodie" }, "orcid": "0000-0002-9173-0740" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Elliot-E", "name": { "family": "Elliot", "given": "Erin" } }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall D." }, "orcid": "0000-0002-3191-8151" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Groff-T-D", "name": { "family": "Groff", "given": "Tyler" }, "orcid": "0000-0001-5978-3247" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Sheckells-M", "name": { "family": "Sheckells", "given": "Matt" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. Jeremy" } }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R\u00e9mi" }, "orcid": "0000-0003-2753-2819" } ] }, "title": "High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design", "ispublished": "unpub", "full_text_status": "public", "keywords": "high angular resolution, coronagraphy, wavefront sensing, wavefront control", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 26 September 2013.\n\nThis work is supported by the National Aeronautics and Space Administration under Grant NNX12AG05G issued through the Astrophysics Research and Analysis (APRA) program (Soummer, PI). The authors acknowledge all the people involved during the process of the testbed design. In particular, they warmly thank Matt Kenworthy, Emmanuel Hugot and Marc Ferrari for fruitful discussions.\n\nPublished - 396374.pdf
Submitted - 1407.0979v1.pdf
", "abstract": "Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars. Segmented telescopes are a compelling option to obtain such large apertures. However, these telescope designs have a complex geometry (central obstruction, support structures, segmentation) that makes high-contrast imaging more challenging. We are developing a new high-contrast imaging testbed at STScI to provide an integrated solution for wavefront control and starlight suppression on complex aperture geometries. We present our approach for the testbed optical design, which defines the surface requirements for each mirror to minimize the amplitude-induced errors from the propagation of out-of-pupil surfaces. Our approach guarantees that the testbed will not be limited by these Fresnel propagation effects, but only by the aperture geometry. This approach involves iterations between classical ray-tracing optical design optimization, and end-to-end Fresnel propagation with wavefront control (e.g. Electric Field Conjugation / Stroke Minimization). The construction of the testbed is planned to start in late Fall 2013.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641K", "id_number": "CaltechAUTHORS:20150521-130036036", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-130036036", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX12AG05G" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2023718", "primary_object": { "basename": "1407.0979v1.pdf", "url": "https://authors.library.caltech.edu/records/v8g6g-5cm94/files/1407.0979v1.pdf" }, "related_objects": [ { "basename": "396374.pdf", "url": "https://authors.library.caltech.edu/records/v8g6g-5cm94/files/396374.pdf" } ], "resource_type": "book_section", "pub_year": "2013", "author_list": "N'Diaye, Mamadou; Choquet, \u00c9lodie; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rtq4a-mmd28", "eprint_id": 87202, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:44", "lastmod": "2024-01-14 20:15:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "J." } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "B." } } ] }, "title": "High-contrast imaging results with the vortex coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex optics, coronagraphy", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 88640Y.pdf
", "abstract": "The vortex coronagraph has already enabled high-contrast observations very close to bright stars on large ground-based telescopes, and it also has great potential for use on coronagraphic space missions aimed at exoplanet detection and characterization. As such, demonstrations of vortex coronagraph performance have recently been carried out in JPL's High Contrast Imaging Testbed. Some of our recent results are presented here, including the suppression of a monochromatic, single-polarization point-source to below the 10^(-9) level over a dark hole covering both the 2-7 \u03bb/D and 3-8 \u03bb/D regions, as well as the suppression of a 10% band of white-light to approximately the 10^(-8) level over a 3-8 \u03bb/D dark hole.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640Y", "id_number": "CaltechAUTHORS:20180618-150615283", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-150615283", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2024660", "primary_object": { "basename": "88640Y.pdf", "url": "https://authors.library.caltech.edu/records/rtq4a-mmd28/files/88640Y.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Serabyn, E.; Trauger, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rjc5n-nm528", "eprint_id": 87201, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:39", "lastmod": "2024-01-14 20:15:36", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" } ] }, "title": "Optimal apodizers for the vector vortex coronagraph with on-axis telescopes", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, High-Resolution Imaging, Exoplanet direct detection", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 88641P.pdf
", "abstract": "Phase mask coronagraphs such as the vortex coronagraph are meant to be used with the circular clear aperture of off-axis telescopes, and their performance is greatly reduced when used with on-axis telescopes. A possible solution to that problem consists in apodizing the entrance pupil plane of the coronagraph. Apodizers can be computed by solving a quadratic optimization problem in which the transmission of the apodizer is maximized under the constraint that the intensity of the electric field in the Lyot plane is less than an extremum value that is chosen to be small enough to sufficiently attenuate the starlight in the subsequent image plane. The transmission of the apodizer and the throughput of the system depends on the characteristics of the aperture and of the Lyot stop. We present apodizers optimally designed for the apertures of the Palomar telescope, the VLT, the E-ELT and the AFTA telescope, and for vortex phase masks with a topological charge of 4. Transmissions of 50 to 80% are found for mean contrast of 10^(-6) in the Lyot plane. The end throughput is between 16% and 55%, and mean contrast in the image plane at 2.5\u03bb/D is between 3 \u00d7 10^(-8) and 3 \u00d7 10^(-9).", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641P", "id_number": "CaltechAUTHORS:20180618-144931063", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-144931063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2024511", "primary_object": { "basename": "88641P.pdf", "url": "https://authors.library.caltech.edu/records/rjc5n-nm528/files/88641P.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Carlotti, Alexis; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/pnhs1-anp84", "eprint_id": 87199, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:30", "lastmod": "2024-01-14 20:15:30", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "Pontus" } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gont\u00e9", "given": "Frederic" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "Mikael" }, "orcid": "0000-0002-2011-0851" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "Anne-Marie" } }, { "id": "Lizon-J-L", "name": { "family": "Lizon", "given": "Jean-Louis" } }, { "id": "Mu\u017eic-K", "name": { "family": "Muzic", "given": "Koraljka" } }, { "id": "Pe\u00f1a-Eduardo", "name": { "family": "Pe\u00f1a", "given": "Eduardo" } }, { "id": "Olivier-R", "name": { "family": "Olivier", "given": "Richard" } }, { "id": "Slusarenko-N", "name": { "family": "Slusarenko", "given": "Nicolas" } }, { "id": "Tacconi-Garman-L-E", "name": { "family": "Tacconi-Garman", "given": "Lowell E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Small-angle, high-contrast exoplanet imaging with the L-band AGPM vector vortex coronagraph now offered at the VLT", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, small inner working angle, adaptive optics, infrared, very large telescope", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile). OA and JS acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9es - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 88640I.pdf
", "abstract": "In November 2012, we installed an L-band annular groove phase mask (AGPM) vector vortex coronagraph (VVC) inside NACO, the adaptive optics camera of ESO's Very Large Telescope. The mask, made out of diamond subwavelength gratings has been commissioned, science qualified, and is now offered to the community. Here we report ground-breaking on-sky performance levels in terms of contrast, inner working angle, and discovery space. This new practical demonstration of the VVC, coming a few years after Palomar's and recent record-breaking lab experiments in the visible (E. Serabyn et al. 2013, these proceedings), shows once again that this new-generation coronagraph has reached a high level of maturity.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88640I", "id_number": "CaltechAUTHORS:20180618-143339926", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-143339926", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9es - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2025501", "primary_object": { "basename": "88640I.pdf", "url": "https://authors.library.caltech.edu/records/pnhs1-anp84/files/88640I.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Mawet, Dimitri; Absil, Olivier; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/92h9a-vva83", "eprint_id": 87198, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:25", "lastmod": "2024-01-14 20:15:28", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "R." } }, { "id": "Cash-W", "name": { "family": "Cash", "given": "W." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "M." } }, { "id": "Glassman-T", "name": { "family": "Glassman", "given": "T." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "O." }, "orcid": "0000-0002-1097-9908" }, { "id": "Kasdin-N-J", "name": { "family": "Kasdin", "given": "N. J." } }, { "id": "Kern-B-D", "name": { "family": "Kern", "given": "B. D." } }, { "id": "Lyon-R", "name": { "family": "Lyon", "given": "R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-M", "name": { "family": "Moody", "given": "D." } }, { "id": "Samuele-R", "name": { "family": "Samuele", "given": "R." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Sirbu-D", "name": { "family": "Sirbu", "given": "D." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } } ] }, "title": "Survey of experimental results in high-contrast imaging for future exoplanet missions", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, coronagraphs, occulters, starshades, starlight suppression", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nWork by PRL was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 88641F.pdf
", "abstract": "We present and compare experimental results in high contrast imaging representing the state of the art in coronagraph and starshade technology. These experiments have been undertaken with the goal of demonstrating the capability of detecting Earth-like planets around nearby Sun-like stars. The contrast of an Earth seen in reflected light around a Sun-like star would be about 1.2 \u00d7 10^(\u221210). Several of the current candidate technologies now yield raw contrasts of 1.0 \u00d7 10^(\u22129) or better, and so should enable the detection of Earths, assuming a gain in sensitivity in post-processing of a factor of 10. We present results of coronagraph and starshade experiments conducted at visible and infrared wavelengths. Cross-sections of dark fields are directly compared as a function of field angle and bandwidth. The strength and differences of the techniques are compared.", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 88641F", "id_number": "CaltechAUTHORS:20180618-142416187", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-142416187", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2021302", "primary_object": { "basename": "88641F.pdf", "url": "https://authors.library.caltech.edu/records/92h9a-vva83/files/88641F.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Lawson, P. R.; Belikov, R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ce9s8-xx780", "eprint_id": 87203, "eprint_status": "archive", "datestamp": "2023-08-19 21:32:49", "lastmod": "2024-01-14 20:15:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Carlotti-A", "name": { "family": "Carlotti", "given": "Alexis" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-C", "name": { "family": "Wallace", "given": "James" } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } } ] }, "title": "The multistage and ring-apodized vortex coronagraph: two simple, small-angle coronagraphic solutions for heavily obscured apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, vortex coronagraphy, on-axis telescopes, apodization, AFTA telescope, Extremely Large Telescopes", "note": "\u00a9 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).\n\nPublished - 886411.pdf
", "abstract": "Here we present two simple concepts to make the vortex coronagraph (VC) immune to heavily obscured apertures. The multi-stage VC (MSVC) uses the ability of the vortex to move light in and out of apertures through multiple VC in series to restore the nominal attenuation capability of the charge 2 vortex regardless of the aperture obscurations. The ring-apodized VC (RAVC) is a one-stage apodizer exploiting the VC Lyot-plane amplitude distribution in order to perfectly null the diffraction from any central obscuration size, and for any vortex topological charge. In this paper, we also emphasize the complementarity and similarities of the RAVC to the recently proposed Active Compensation of Aperture Discontinuities (ACAD, L. Pueyo et al. 2013, these proceedings) and more finely optimized shaped-pupil-like apodizations (A. Carlotti et al. 2013, these proceedings). This paper ends with a brief discussion about the trade-offs these techniques offer in the framework of the Extremely Large Telescopes (ELT) and the Astrophysics Focused Telescope Assets (AFTA).", "date": "2013-09-26", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 886411", "id_number": "CaltechAUTHORS:20180618-151123843", "isbn": "9780819497147", "book_title": "Techniques and Instrumentation for Detection of Exoplanets VI", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-151123843", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.2025574", "primary_object": { "basename": "886411.pdf", "url": "https://authors.library.caltech.edu/records/ce9s8-xx780/files/886411.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Mawet, Dimitri; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kfbvy-p6e41", "eprint_id": 57722, "eprint_status": "archive", "datestamp": "2023-08-22 10:03:05", "lastmod": "2023-10-23 17:40:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "H. M." } }, { "id": "Bazzon-A", "name": { "family": "Bazzon", "given": "A." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "K." } }, { "id": "Roelfsema-R", "name": { "family": "Roelfsema", "given": "R." } } ] }, "title": "Prospects of detecting the polarimetric signature of the Earth-mass planet \u03b1 Centauri B b with SPHERE/ZIMPOL", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; planets and satellites: detection; instrumentation: polarimeters; polarization; planets and satellites: individual: alpha Centauri; planets and satellites: atmospheres", "note": "\u00a9 2013 ESO.\n\nReceived 12 May 2013; Accepted 4 June 2013.\n\nPublished - aa21881-13.pdf
Submitted - 1306.1006v3.pdf
", "abstract": "Context. Over the past five years, radial-velocity and transit techniques have revealed a new population of Earth-like planets with masses of a few Earth masses. Their very close orbit around their host star requires an exquisite inner working angle to be detected in direct imaging and sets a challenge for direct imagers that work in the visible range, such as SPHERE/ZIMPOL.\nAims. Among all known exoplanets with less than 25 Earth masses we first predict the best candidate for direct imaging. Our primary objective is then to provide the best instrument setup and observing strategy for detecting such a peculiar object with ZIMPOL. As a second step, we aim at predicting its detectivity.\nMethods. Using exoplanet properties constrained by radial velocity measurements, polarimetric models and the diffraction propagation code CAOS, we estimate the detection sensitivity of ZIMPOL for such a planet in different observing modes of the instrument. We show how observing strategies can be optimized to yield the best detection performance on a specific target.\nResults. In our current knowledge of exoplanetary systems, \u03b1 Centauri B b is the most promising target with less than 25 Earth masses for ZIMPOL. With a gaseous Rayleigh-scattering atmosphere and favorable inclinations, the planet could be detected in about four hours of observing time, using the four-quadrant phase-mask coronograph in the I band. However, if \u03b1 Centauri B b should display unfavorable polarimetric and reflective properties similar to that of our Moon, it is around 50 times fainter than the best sensitivity of ZIMPOL.\nConclusions. \u03b1 Centauri B is a primary target for SPHERE. Dedicated deep observations specifically targeting the radial velocity-detected planet can lead to a detection if the polarimetric properties of the planet are favorable.", "date": "2013-08", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "556", "publisher": "EDP Sciences", "pagerange": "Art. No. A64", "id_number": "CaltechAUTHORS:20150520-144759505", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-144759505", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/0004-6361/201321881", "primary_object": { "basename": "1306.1006v3.pdf", "url": "https://authors.library.caltech.edu/records/kfbvy-p6e41/files/1306.1006v3.pdf" }, "related_objects": [ { "basename": "aa21881-13.pdf", "url": "https://authors.library.caltech.edu/records/kfbvy-p6e41/files/aa21881-13.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Milli, J.; Mouillet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/bxw5p-ebj37", "eprint_id": 57879, "eprint_status": "archive", "datestamp": "2023-08-22 09:40:06", "lastmod": "2023-10-23 17:50:49", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kniazev-A-Y", "name": { "family": "Kniazev", "given": "A. Y." } }, { "id": "Vaisanen-P", "name": { "family": "Vaisanen", "given": "P." } }, { "id": "Mu\u017eic-K", "name": { "family": "Mu\u017eic", "given": "K." } }, { "id": "Mehner-A", "name": { "family": "Mehner", "given": "A." }, "orcid": "0000-0002-9564-3302" }, { "id": "Boffin-H-M-J", "name": { "family": "Boffin", "given": "H. M. J." } }, { "id": "Kurtev-R", "name": { "family": "Kurtev", "given": "R." } }, { "id": "Melo-C-H-F", "name": { "family": "Melo", "given": "C." } }, { "id": "Ivanov-V-D", "name": { "family": "Ivanov", "given": "V. D." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Schmidtobreick-L", "name": { "family": "Schmidtobreick", "given": "L." } }, { "id": "Hu\u00e9lamo-N", "name": { "family": "Hu\u00e9lamo", "given": "N." }, "orcid": "0000-0002-2711-8143" }, { "id": "Borissova-J", "name": { "family": "Borissova", "given": "J." }, "orcid": "0000-0002-5936-7718" }, { "id": "Minniti-D", "name": { "family": "Minniti", "given": "D." }, "orcid": "0000-0002-7064-099X" }, { "id": "Ishibashi-K", "name": { "family": "Ishibashi", "given": "K." } }, { "id": "Potter-S-B", "name": { "family": "Potter", "given": "S. B." }, "orcid": "0000-0002-5956-2249" }, { "id": "Beletsky-Y", "name": { "family": "Beletsky", "given": "Y." } }, { "id": "Buckley-D-A-H", "name": { "family": "Buckley", "given": "D. A. H." }, "orcid": "0000-0002-7004-9956" }, { "id": "Crawford-S", "name": { "family": "Crawford", "given": "S." } }, { "id": "Gulbis-A-A-S", "name": { "family": "Gulbis", "given": "A. A. S." } }, { "id": "Kotze-P", "name": { "family": "Kotze", "given": "P." } }, { "id": "Miszalski-B", "name": { "family": "Miszalski", "given": "B." } }, { "id": "Pickering-T-E", "name": { "family": "Pickering", "given": "T. E." } }, { "id": "Romero-Colmenero-E", "name": { "family": "Romero Colmenero", "given": "E." } }, { "id": "Williams-T-B", "name": { "family": "Williams", "given": "T. B." } } ] }, "title": "Characterization of the nearby L/T Binary Brown Dwarf WISE J104915.57\u2013531906.1 at 2 Pc from the Sun", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs; infrared: stars; solar neighborhood; stars: individual (G 171-22, HD 55383, WISE J104915.57-531906.1); stars: low-mass", "note": "\u00a9 2013 The American Astronomical Society.\n\nReceived 2013 March 28; Accepted 2013 May 2; Published 2013 June 4.\n\nSome observations reported in this paper were obtained with the Southern African Large Telescope (SALT). All SAAO and SALT co-authors acknowledge the support from the National Research Foundation (NRF) of South Africa. This research has benefited from the MLTY dwarf compendium at http://DwarfArchives.org. We thank Adam Burgasser for making some template spectra available to us and the anonymous referee for the suggestions that helped to greatly improve the paper. R.K. and J.B. acknowledge partial support from FONDECYT through grant Nos. 1130140 and 1120601, respectively. D.M. is supported by BASAL CATA PFB-06 and FONDECYT No. 1130196.\n\nPublished - apj_770_2_124.pdf
Accepted Version - 1303.7171v2.pdf
", "abstract": "WISE J104915.57\u2013531906.1 is a L/T brown dwarf binary located 2 pc from the Sun. The pair contains the closest known brown dwarfs and is the third closest known system, stellar or sub-stellar. We report comprehensive follow-up observations of this newly uncovered system. We have determined the spectral types of both components (L8 \u00b1 1, for the primary, agreeing with the discovery paper; T1.5 \u00b1 2 for the secondary, which was lacking spectroscopic type determination in the discovery paper) and, for the first time, their radial velocities (V_(rad) ~ 23.1, 19.5 km s^(\u20131)) using optical spectra obtained at the Southern African Large Telescope and other facilities located at the South African Astronomical Observatory (SAAO). The relative radial velocity of the two components is smaller than the range of orbital velocities for theoretically predicted masses, implying that they form a gravitationally bound system. We report resolved near-infrared JHK_S photometry from the Infrared Survey Facility telescope at the SAAO which yields colors consistent with the spectroscopically derived spectral types. The available kinematic and photometric information excludes the possibility that the object belongs to any of the known nearby young moving groups or associations. Simultaneous optical polarimetry observations taken at the SAAO 1.9 m give a non-detection with an upper limit of 0.07%. For the given spectral types and absolute magnitudes, 1 Gyr theoretical models predict masses of 0.04-0.05 M _\u2609 for the primary, and 0.03-0.05 M _\u2609 for the secondary.", "date": "2013-06-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "770", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 124", "id_number": "CaltechAUTHORS:20150528-123635645", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-123635645", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Research Foundation of South Africa" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130140" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1120601" }, { "agency": "El Centro de Astrof\u00edsica y Tecnolog\u00edas Afines' (CATA)", "grant_number": "PFB-06" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1130196" } ] }, "doi": "10.1088/0004-637X/770/2/124", "primary_object": { "basename": "1303.7171v2.pdf", "url": "https://authors.library.caltech.edu/records/bxw5p-ebj37/files/1303.7171v2.pdf" }, "related_objects": [ { "basename": "apj_770_2_124.pdf", "url": "https://authors.library.caltech.edu/records/bxw5p-ebj37/files/apj_770_2_124.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Kniazev, A. Y.; Vaisanen, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yeky1-2vy10", "eprint_id": 57850, "eprint_status": "archive", "datestamp": "2023-08-19 20:17:22", "lastmod": "2023-10-23 17:49:25", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High Contrast Imaging with the New Vortex Coronagraph on NACO", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2013 European Southern Observatory.\n\nPublished - messenger-no152-8-13.pdf
", "abstract": "The installation and successful commissioning of an L'-band annular groove phase mask (AGPM) coronagraph on VLT/NACO is presented. The AGPM is a vector vortex coronagraph made from diamond sub-wavelength gratings tuned to the L'-band. The vector vortex coronagraph enables high-contrast imaging at very small inner working angles (here 0.09 arcseconds, the diffraction limit of the VLT at L'), potentially opening up a new parameter space in high-resolution imaging. During technical and science verification runs, we discovered a late-type companion at two beamwidths from an F0V star, and imaged the inner regions of \u03b2 Pictoris down to the previously unexplored projected radius of 1.75 astronomical units. The circumstellar disc of \u03b2 Pic was also resolved from 1 to 5 arcseconds. These results showcase the potential of the NACO L'-band AGPM over a wide range of spatial scales.", "date": "2013-06", "date_type": "published", "publication": "Messenger", "volume": "152", "number": "6", "publisher": "European Southern Observatory", "pagerange": "8-13", "id_number": "CaltechAUTHORS:20150527-093543432", "issn": "0722-6691", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-093543432", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "messenger-no152-8-13.pdf", "url": "https://authors.library.caltech.edu/records/yeky1-2vy10/files/messenger-no152-8-13.pdf" }, "resource_type": "article", "pub_year": "2013", "author_list": "Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vtw2s-72317", "eprint_id": 57880, "eprint_status": "archive", "datestamp": "2023-08-19 19:48:37", "lastmod": "2024-01-13 16:20:52", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Patru-F", "name": { "family": "Patru", "given": "Fabien" } }, { "id": "Antichi-J", "name": { "family": "Antichi", "given": "Jacopo" } }, { "id": "Rabou-P", "name": { "family": "Rabou", "given": "Patrick" } }, { "id": "Giro-E", "name": { "family": "Giro", "given": "Enrico" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "Julien" }, "orcid": "0000-0001-9325-2511" }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Carbillet-M", "name": { "family": "Carbillet", "given": "Marcel" } }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "Denis" } } ] }, "title": "Discretized aperture mapping with a micro-lenses array for interferometric direct imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2014\n\nPublished - fulltext_13389.pdf
", "abstract": "Discretized Aperture Mapping (DAM) appears as an original filtering tech nique easy to play with existing adaptive optics (AO) systems. In its essential DAM operates\nas an optical passive filter removing part of the phase residuals in the wavefront without introducing any difficult-to-align component in the Fourier conjugate of the entrance pupil plane. DAM reveals as a new interferometric technique combined with spatial filtering allowing direct imaging over a narrow field of view (FOV). In fact, the entrance pupil of a single telescope is divided into many sub-pupils so that the residual phase\nin each sub-pupil is filtered up to the DAM cut-off\nfrequency. DAM enables to smooth the small scale wavefront defects which correspond to high spatial frequencies in the\npupil plane and to low angular frequencies in the image plane. Close to the AO Nyquist frequency, such pupil plane spatial frequencies are not well measured by the wavefront sensor (WFS) due to aliasing. Once bigger than the AO Nyquist frequency, they are no more measured by the WFS due to the fitting limit responsible for the narrow AOFOV. The corresponding image plane angular frequencies are not tran\nsmitted by DAM and are useless to image small FOVs, as stated by interferometry. That is why AO and DAM are complementary assuming that the DAM cut-off frequency is equal to the AO Nyquist frequency. Here we describe the imaging capabilities when DAM is placed downstream an AO system, over a convenient pupil which precedes the\nscientific detector. We show firstly that the imaging properties are preserved on a narrow FOV allowing direct imaging throughout interferometry. Then we show how the residual pupil plane spatial frequencies bigger than the AO Nyquist one are filtered out, as well as the residual halo\nin the image is dimmed.", "date": "2013-05", "date_type": "published", "pagerange": "1-8", "id_number": "CaltechAUTHORS:20150528-125433797", "isbn": "978-88-908876-0-4", "book_title": "Third AO4ELT Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-125433797", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Esposito-S", "name": { "family": "Esposito", "given": "Simone" } }, { "id": "Fini-L", "name": { "family": "Fini", "given": "Luca" } } ] }, "doi": "10.12839/AO4ELT3.13389", "primary_object": { "basename": "fulltext_13389.pdf", "url": "https://authors.library.caltech.edu/records/vtw2s-72317/files/fulltext_13389.pdf" }, "resource_type": "book_section", "pub_year": "2013", "author_list": "Patru, Fabien; Antichi, Jacopo; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tme5h-py525", "eprint_id": 57712, "eprint_status": "archive", "datestamp": "2023-08-22 09:16:42", "lastmod": "2023-10-23 17:39:52", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Kuittinen-M", "name": { "family": "Kuittinen", "given": "M." } }, { "id": "Vartiainen-I", "name": { "family": "Vartiainen", "given": "I." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "Laboratory demonstration of a mid-infrared AGPM vector vortex coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; planetary systems; planets and satellites: detection", "note": "\u00a9 2013 ESO.\n\nReceived 18 January 2013; Accepted 29 March 2013.\n\nThe first author is grateful to the financial support of the Belgian Fonds de la Recherche Scientifique (FRIA) and Fonds de solidarit\u00e9 ULg. S.H. and J.S. acknowledge support from the Belgian FRS-FNRS FRFC.We also gratefully acknowledge financial support from the Swedish Diamond Centre (financed by Uppsala University), and the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - aa21126-13.pdf
Submitted - 1304.1180v1.pdf
", "abstract": "Context. Coronagraphy is a powerful technique to achieve high contrast imaging, hence to image faint companions around bright targets. Various concepts have been used in the visible and near-infrared regimes, while coronagraphic applications in the mid-infrared nowadays remain largely unexplored. Vector vortex phase masks based on concentric subwavelength gratings show great promise for such applications.\nAims. We aim at producing and validating the first high-performance broadband focal plane phase mask coronagraphs for applications in the mid-infrared regime, and in particular the L band with a fractional bandwidth of ~16% (3.5\u20134.1 \u03bcm).\nMethods. Based on rigorous coupled wave analysis, we designed an annular groove phase mask (AGPM) producing a vortex effect in the L band, and etched it onto a series of diamond substrates. The grating parameters were measured by means of scanning electron microscopy. The resulting components were then tested on a mid-infrared coronagraphic test bench.\nResults. A broadband raw null depth of 2 \u00d7 10^(-3) was obtained for our best L-band AGPM after only a few iterations between design and manufacturing. This corresponds to a raw contrast of about 6 \u00d7 10^(-5) (10.5 mag) at 2\u03bb/D. This result is fully in line with our projections based on rigorous coupled wave analysis modelling, using the measured grating parameters. The sensitivity to tilt and focus has also been evaluated. \nConclusions. After years of technological developments, mid-infrared vector vortex coronagraphs have finally become a reality and live up to our expectations. Based on their measured performance, our L-band AGPMs are now ready to open a new parameter space in exoplanet imaging at major ground-based observatories.", "date": "2013-05", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "553", "publisher": "EDP Sciences", "pagerange": "Art. No. UNSP A98", "id_number": "CaltechAUTHORS:20150520-123604518", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-123604518", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "Fonds de solidarit\u00e9 ULg" }, { "agency": "Swedish Diamond Centre" }, { "agency": "Uppsala University" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201321126", "primary_object": { "basename": "1304.1180v1.pdf", "url": "https://authors.library.caltech.edu/records/tme5h-py525/files/1304.1180v1.pdf" }, "related_objects": [ { "basename": "aa21126-13.pdf", "url": "https://authors.library.caltech.edu/records/tme5h-py525/files/aa21126-13.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Delacroix, C.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g6c3h-08z10", "eprint_id": 57711, "eprint_status": "archive", "datestamp": "2023-08-22 09:03:48", "lastmod": "2023-10-23 17:39:49", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J. H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "J." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "V." }, "orcid": "0000-0002-0101-8814" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "M." } }, { "id": "Lizon-J-L", "name": { "family": "Lizon", "given": "J.-L." } }, { "id": "Mu\u017eic-K", "name": { "family": "Mu\u017eic", "given": "K." } }, { "id": "Olivier-R", "name": { "family": "Olivier", "given": "R." } }, { "id": "Pe\u00f1a-E", "name": { "family": "Pe\u00f1a", "given": "E." } }, { "id": "Slusarenko-N", "name": { "family": "Slusarenko", "given": "N." } }, { "id": "Tacconi-Garman-L-E", "name": { "family": "Tacconi-Garman", "given": "L. E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "L'-band AGPM vector vortex coronagraph's first light on VLT/NACO: Discovery of a late-type companion at two beamwidths from an F0V star", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; planetary systems; binaries: close", "note": "\u00a9 2013 ESO.\n\nReceived 18 February 2013; Accepted 1 April 2013.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile). O.A. and J.S. acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherch\u00e9 concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe. We would like to thank the referee, Dr Christian Marois, for his constructive comments.\n\nPublished - aa21315-13.pdf
Submitted - 1304.0930v1.pdf
", "abstract": "Context. High contrast imaging has thoroughly combed through the limited search space accessible with first-generation ground-based adaptive optics instruments and the Hubble Space Telescope. Only a few objects were discovered, and many non-detections reported and statistically interpreted. The field is now in need of a technological breakthrough.\nAims. Our aim is to open a new search space with first-generation systems such as NACO at the Very Large Telescope, by providing ground-breaking inner working angle (IWA) capabilities in the L\u2032 band. The L\u2032 band is a sweet spot for high contrast coronagraphy since the planet-to-star brightness ratio is favorable, while the Strehl ratio is naturally higher.\nMethods. An annular groove phase mask (AGPM) vector vortex coronagraph optimized for the L\u2032 band made from diamond subwavelength gratings was manufactured and qualified in the lab. The AGPM enables high contrast imaging at very small IWA, potentially being the key to unexplored discovery space.\nResults. Here we present the installation and successful on-sky tests of an L'-band AGPM coronagraph on NACO. Using angular differential imaging, which is well suited to the rotational symmetry of the AGPM, we demonstrated a \u0394L\u2032 > 7.5 mag contrast from an IWA \u2243 0.\"09 onwards, during average seeing conditions, and for total integration times of a few hundred seconds.", "date": "2013-04", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "552", "publisher": "EDP Sciences", "pagerange": "Art. No. L13", "id_number": "CaltechAUTHORS:20150520-115106627", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-115106627", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201321315", "primary_object": { "basename": "aa21315-13.pdf", "url": "https://authors.library.caltech.edu/records/g6c3h-08z10/files/aa21315-13.pdf" }, "related_objects": [ { "basename": "1304.0930v1.pdf", "url": "https://authors.library.caltech.edu/records/g6c3h-08z10/files/1304.0930v1.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Mawet, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g3r83-q2z69", "eprint_id": 57733, "eprint_status": "archive", "datestamp": "2023-08-22 08:49:52", "lastmod": "2023-10-23 17:42:38", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Schuhler-N", "name": { "family": "Schuhler", "given": "N." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } } ] }, "title": "Extinction-controlled adaptive phase-mask coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; instrumentation: adaptive optics; techniques: high angular resolution", "note": "\u00a9 2013 ESO. Article published by EDP Sciences.\n\nReceived 5 June 2012; accepted 26 October 2012.\n\nThe authors would like to thank the referee, Dr. Laurent Pueyo, for his very valuable remarks and comments, which greatly helped improve the quality and readability of this paper. This work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).\n\nPublished - aa19753-12.pdf
Submitted - 1210.7402v1.pdf
", "abstract": "Context. Phase-mask coronagraphy is advantageous in terms of inner working angle and discovery space. It is, however, still affected by drawbacks such as sensitivity to tip-tilt errors and chromatism. A nulling stellar coronagraph based on the adaptive phase-mask concept using polarization interferometry is presented in this paper.\n\nAims. Our concept aims at dynamically and achromatically optimizing the nulling efficiency of the coronagraph, making it more immune to fast low-order aberrations (tip-tilt errors, focus, etc.).\n\nMethods. We performed numerical simulations to demonstrate the value of the proposed method. The active control system will correct for the detrimental effects of image instabilities on the destructive interference. The mask adaptability in size, phase, and amplitude also compensates for manufacturing errors of the mask itself and, potentially, for chromatic effects. Liquid-crystal properties are used to provide variable transmission of an annulus around the phase mask, but also to achieve the achromatic \u03c0 phase shift in the core of the point spread function by rotating the polarization by 180\u00b0.\n\nResults. We developed a new concept and showed its practical advantages using numerical simulations. This new adaptive implementation of the phase-mask coronagraph could advantageously be used on current and next-generation adaptive optics systems, enabling small inner working angles without compromising contrast.", "date": "2013-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "551", "publisher": "EDP Sciences", "pagerange": "Art. No. A42", "id_number": "CaltechAUTHORS:20150521-095125386", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-095125386", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/0004-6361/201219753", "primary_object": { "basename": "1210.7402v1.pdf", "url": "https://authors.library.caltech.edu/records/g3r83-q2z69/files/1210.7402v1.pdf" }, "related_objects": [ { "basename": "aa19753-12.pdf", "url": "https://authors.library.caltech.edu/records/g3r83-q2z69/files/aa19753-12.pdf" } ], "resource_type": "article", "pub_year": "2013", "author_list": "Bourget, P.; Schuhler, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/j3z38-vq779", "eprint_id": 57796, "eprint_status": "archive", "datestamp": "2023-08-19 18:55:26", "lastmod": "2023-10-23 17:45:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Gene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Recent Progress in Vortex Coronagraphy", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2013 IEEE.\n\nPart of this research was carried out at the Jet Propulsion\nLaboratory, California Institute of Technology, under a\ncontract with NASA.", "abstract": "The Optical Vortex Coronagraph (OVC) is a phase-based coronagraph that can enable high-contrast imaging observations very near bright stars and can make use of smaller telescope diameters than most alternative techniques. This paper first briefly describes the basic principles of operation of the vortex coronagraph, which applies an azimuthal phase spiral to the focal plane point spread function, and then turns to recent advances, both in understanding and in the needed technology development. In particular, vortex phase masks based on circularly-symmetric half-wave plates made of both liquid-crystal polymers and photonic crystals have now achieved very good contrast. Moreover, a dual-stage vortex coronagraph configuration can be used to achieve high contrast in the case of an on-axis telescope, i.e., in the presence of obscuration due to a secondary mirror and a secondary support structure. Further development of the relevant vortex techniques could potentially enable a range of high-contrast coronagraphic space missions, from an initial explorer class mission to a large flagship class exoplanet imaging mission. Of particular interest in this regard is the use of one of the two former 2.4 m National Reconnaissance Office telescopes for coronagraphic observations.", "date": "2013-03", "date_type": "published", "publisher": "IEEE", "place_of_pub": "Piscataway, NJ", "pagerange": "1-6", "id_number": "CaltechAUTHORS:20150526-090116280", "isbn": "978-1-4673-1812-9", "book_title": "2013 IEEE Aerospace Conference", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-090116280", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1109/AERO.2013.6497185", "resource_type": "book_section", "pub_year": "2013", "author_list": "Serabyn, Gene and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mvywd-7zj22", "eprint_id": 57833, "eprint_status": "archive", "datestamp": "2023-08-22 08:18:56", "lastmod": "2023-10-23 17:48:35", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cassius-S", "name": { "family": "Cassius", "given": "Simon" } }, { "id": "van-der-Plas-G", "name": { "family": "van der Plas", "given": "Gerrit" }, "orcid": "0000-0001-5688-187X" }, { "id": "Perez-M-S", "name": { "family": "Perez", "given": "M. Sebastian" } }, { "id": "Dent-W-R-F", "name": { "family": "Dent", "given": "William R. F." } }, { "id": "Fomalont-E", "name": { "family": "Fomalont", "given": "Ed" } }, { "id": "Hagelberg-J", "name": { "family": "Hagelberg", "given": "Janis" }, "orcid": "0000-0002-1096-1433" }, { "id": "Hales-A", "name": { "family": "Hales", "given": "Antonio" } }, { "id": "Jord\u00e1n-Andr\u00e9s", "name": { "family": "Jord\u00e1n", "given": "Andr\u00e9s" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "M\u00e9nard-F", "name": { "family": "M\u00e9nard", "given": "Fran\u00e7ois" } }, { "id": "Wootten-A", "name": { "family": "Wootten", "given": "Al" } }, { "id": "Wilner-D-J", "name": { "family": "Wilner", "given": "David J." }, "orcid": "0000-0003-1526-7587" }, { "id": "Hughes-A-M", "name": { "family": "Hughes", "given": "A. Meredith" } }, { "id": "Schreiber-M-R", "name": { "family": "Schreiber", "given": "Matthias R." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H." }, "orcid": "0000-0001-8627-0404" }, { "id": "Ercolano-B", "name": { "family": "Ercolano", "given": "Barbara" } }, { "id": "Canovas-H", "name": { "family": "Canovas", "given": "Hector" }, "orcid": "0000-0001-7668-8022" }, { "id": "Rom\u00e1n-P-E", "name": { "family": "Rom\u00e1n", "given": "Pablo E." } }, { "id": "Salinas-V-N", "name": { "family": "Salinas", "given": "Vachail" } } ] }, "title": "Flows of gas through a protoplanetary gap", "ispublished": "pub", "full_text_status": "public", "keywords": "Interstellar medium; Stars", "note": "\u00a9 2013 Macmillan Publishers Limited.\n\nReceived 12 August; accepted 31 October 2012; published online 2 January; corrected online 9 January 2013.\n\nThis paper makes use of the following ALMA data: ADS/\nJAO.ALMA#2011.0.00465.S. ALMA is a partnership of the ESO, NSF, NINS, NRC, NSC and ASIAA. The Joint ALMA Observatory is operated by the ESO, AUI/NRAO and NAOJ. This work was also based on observations obtained at the Gemini Observatory. Financial support was provided by Millennium NucleusP10-022-F (Chilean Ministry of Economy) and additionally by grant FONDECYT 1100221 and grant 284405 from the European Union FP7 programme.\n\nSupplemental Material - nature11769-s1.pdf
", "abstract": "The formation of gaseous giant planets is thought to occur in the first few million years after stellar birth. Models predict that the process produces a deep gap in the dust component (shallower in the gas). Infrared observations of the disk around the young star HD\u2009142527 (at a distance of about 140 parsecs from Earth) found an inner disk about 10 astronomical units (au) in radius (1\u2009au is the Earth\u2013Sun distance), surrounded by a particularly large gap and a disrupted outer disk beyond 140\u2009au. This disruption is indicative of a perturbing planetary-mass body at about 90\u2009au. Radio observations indicate that the bulk mass is molecular and lies in the outer disk, whose continuum emission has a horseshoe morphology. The high stellar accretion rate would deplete the inner disk in less than one year, and to sustain the observed accretion matter must therefore flow from the outer disk and cross the gap. In dynamical models, the putative protoplanets channel outer-disk material into gap-crossing bridges that feed stellar accretion through the inner disk. Here we report observations of diffuse CO gas inside the gap, with denser HCO+ gas along gap-crossing filaments. The estimated flow rate of the gas is in the range of 7\u2009\u00d7\u200910^(\u22129) to 2\u2009\u00d7\u200910^(\u22127) solar masses per year, which is sufficient to maintain accretion onto the star at the present rate.", "date": "2013-01-10", "date_type": "published", "publication": "Nature", "volume": "493", "number": "7431", "publisher": "Nature Publishing Group", "pagerange": "191-194", "id_number": "CaltechAUTHORS:20150526-162525769", "issn": "0028-0836", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-162525769", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Chilean Ministry of Economy" }, { "agency": "Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico (FONDECYT)", "grant_number": "1100221" }, { "agency": "European Union FP7 programme" } ] }, "doi": "10.1038/nature11769", "primary_object": { "basename": "nature11769-s1.pdf", "url": "https://authors.library.caltech.edu/records/mvywd-7zj22/files/nature11769-s1.pdf" }, "resource_type": "article", "pub_year": "2013", "author_list": "Cassius, Simon; van der Plas, Gerrit; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1719r-5ee31", "eprint_id": 57798, "eprint_status": "archive", "datestamp": "2023-08-19 13:03:04", "lastmod": "2023-10-23 17:45:51", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "SPICES: spectro-polarimetric imaging and characterization of exoplanetary systems", "ispublished": "pub", "full_text_status": "restricted", "note": "\u00a9 2012 Springer Science+Business Media B.V. \n\nReceived: 9 May 2011; Accepted: 6 February 2012; Published online: 29 February 2012.\n\nWe would like to thanks H. Boithias, E. Sein at ASTRIUM France for their\ntechnical support and A. Laurens, O. Lamarle at CNES for both financial and technical support\nduring this ESA Cosmic Vision proposal study. We are also grateful to the referee for relevant\ncomments which helped to improve this paper.", "abstract": "SPICES (Spectro-Polarimetric Imaging and Characterization of Exoplanetary Systems) is a five-year M-class mission proposed to ESA Cosmic Vision. Its purpose is to image and characterize long-period extrasolar planets and circumstellar disks in the visible (450\u2013900 nm) at a spectral resolution of about 40 using both spectroscopy and polarimetry. By 2020/2022, present and near-term instruments will have found several tens of planets that SPICES will be able to observe and study in detail. Equipped with a 1.5 m telescope, SPICES can preferentially access exoplanets located at several AUs (0.5\u201310 AU) from nearby stars (<25 pc) with masses ranging from a few Jupiter masses to Super Earths (\u223c2 Earth radii, \u223c10 M\u2295) as well as circumstellar disks as faint as a few times the zodiacal light in the Solar System.", "date": "2012-10", "date_type": "published", "publication": "Experimental Astronomy", "volume": "34", "number": "2", "publisher": "Springer", "pagerange": "355-384", "id_number": "CaltechAUTHORS:20150526-091307663", "issn": "0922-6435", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-091307663", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" } ] }, "doi": "10.1007/s10686-012-9290-5", "resource_type": "article", "pub_year": "2012", "author_list": "Boccaletti, Anthony and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9qx6w-5cn96", "eprint_id": 57759, "eprint_status": "archive", "datestamp": "2023-08-19 12:55:42", "lastmod": "2024-01-13 16:19:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kerber-F", "name": { "family": "Kerber", "given": "Florian" } }, { "id": "K\u00e4ufl-H-U", "name": { "family": "K\u00e4ufl", "given": "Hans Ulrich" } }, { "id": "Baksai-P", "name": { "family": "Baksai", "given": "Pedro" } }, { "id": "Dobrzycka-D", "name": { "family": "Dobrzycka", "given": "Danuta" } }, { "id": "Finger-G", "name": { "family": "Finger", "given": "Gert" } }, { "id": "Ives-D", "name": { "family": "Ives", "given": "Derek" } }, { "id": "Gerd-J", "name": { "family": "Jakob", "given": "Gerd" } }, { "id": "Lagadec-E", "name": { "family": "Lagadec", "given": "Eric" } }, { "id": "Lundin-L", "name": { "family": "Lundin", "given": "Lars" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mehrgan-L", "name": { "family": "Mehrgan", "given": "Leander" } }, { "id": "Moerchen-M", "name": { "family": "Moerchen", "given": "Margaret" } }, { "id": "Momany-Y", "name": { "family": "Momany", "given": "Yazan" } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "Vincent" } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "Eric" } }, { "id": "Riquelme-M", "name": { "family": "Riquelme", "given": "Miguel" } }, { "id": "Siebenmorgen-R", "name": { "family": "Siebenmorgen", "given": "Ralf" } }, { "id": "Silber-A", "name": { "family": "Silber", "given": "Armin" } }, { "id": "Smette-A", "name": { "family": "Smette", "given": "Alain" } }, { "id": "Taylor-J", "name": { "family": "Taylor", "given": "Julian" } }, { "id": "van-den-Ancker-M", "name": { "family": "van den Ancker", "given": "Mario" } }, { "id": "Venema-L", "name": { "family": "Venema", "given": "Lars" } }, { "id": "Weilenmann-U", "name": { "family": "Weilenmann", "given": "Ueli" } }, { "id": "Yegorova-I", "name": { "family": "Yegorova", "given": "Irina" } } ] }, "title": "VISIR Upgrade Overview and Status", "ispublished": "unpub", "full_text_status": "public", "keywords": "VISIR, VLT, mid-IR, Aquarius, upgrade, PWV, pipeline, Reflex, TIMMI 2", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 27, 2012.\n\nThe commissioning team is grateful to Paranal staff for their excellent support during the commissioning and early operations.\n\nPublished - 396465.pdf
", "abstract": "We present an overview of the VISIR upgrade project. VISIR is the mid-infrared imager and spectrograph at ESO's VLT. The project team is comprised of ESO staff and members of the original VISIR consortium: CEA Saclay and ASTRON. The project plan is based on input from the ESO user community with the goal of enhancing the scientific performance and efficiency of VISIR by a combination of measures: installation of improved hardware, optimization of instrument operations and software support. The cornerstone of the upgrade is the 1k by 1k Si:As Aquarius detector array (Raytheon) which has demonstrated very good performance (sensitivity, stability) in the laboratory IR detector test facility (modified TIMMI 2 instrument). A prism spectroscopic mode will cover the N-band in a single observation. New scientific capabilities for high resolution and high-contrast imaging will be offered by sub-aperture mask (SAM) and phase-mask coronagraphic (4QPM/AGPM) modes. In order to make optimal use of favourable atmospheric conditions a water vapour monitor has been deployed on Paranal, allowing for real-time decisions and the introduction of a userdefined constraint on water vapour. Improved pipelines based on the ESO Reflex concept will provide better support to astronomers. The upgraded VISIR will be a powerful instrument providing background limited performance for diffraction-limited observations at an 8-m telescope. It will offer synergy with facilities such as ALMA, JWST, VLTI and SOFIA, while a wealth of targets is available from survey work (e.g. VISTA, WISE). In addition it will bring confirmation of the technical readiness and scientific value of several aspects of potential mid-IR instrumentation at Extremely Large Telescopes. The intervention on VISIR and installation of hardware has been completed in July and commissioning will take place during July and August. VISIR is scheduled to be available to the users starting Oct 2012.", "date": "2012-09-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84460E", "id_number": "CaltechAUTHORS:20150522-074102957", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-074102957", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.924979", "primary_object": { "basename": "396465.pdf", "url": "https://authors.library.caltech.edu/records/9qx6w-5cn96/files/396465.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Kerber, Florian; K\u00e4ufl, Hans Ulrich; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/j52ej-m7024", "eprint_id": 57745, "eprint_status": "archive", "datestamp": "2023-08-19 12:51:51", "lastmod": "2024-01-13 16:19:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Pantin-E", "name": { "family": "Pantin", "given": "E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "A diamond AGPM coronagraph for VISIR", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, phase mask, high dynamic range, achromatization, subwavelength grating, vector vortex,\nexoplanet, circumstellar matter", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 24 September 2012.\n\nC. Delacroix gratefully acknowledges the financial support of the Belgian Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA) and Fonds de solidarit\u00e9 ULg. The authors from the Li\u00e8ge University acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 396464.pdf
", "abstract": "In recent years, phase mask coronagraphy has become increasingly efficient in imaging the close environment of stars, enabling the search for exoplanets and circumstellar disks. Coronagraphs are ideally suited instruments, characterized by high dynamic range imaging capabilities, while preserving a small inner working angle. The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) consists of a vector vortex induced by a rotationally symmetric subwavelength grating. This technique constitutes an almost unique solution to the achromatization at longer wavelengths (mid-infrared). For this reason, we have specially conceived a mid-infrared AGPM coronagraph for the forthcoming upgrade of VISIR, the mid-IR imager and spectrograph on the VLT at ESO (Paranal), in collaboration with members of the VISIR consortium. The implementation phase of the VISIR Upgrade Project is foreseen for May-August 2012, and the AGPM installed will cover the 11-13.2 \u03bcm spectral range. In this paper, we present the entire fabrication process of our AGPM imprinted on a diamond substrate. Diamond is an ideal material for mid-infrared wavelengths owing to its high transparency, small dispersion, extremely low thermal expansion and outstanding mechanical and chemical properties. The design process has been performed with an algorithm based on the rigorous coupled wave analysis (RCWA), and the micro-fabrication has been carried out using nano-imprint lithography and reactive ion etching. A precise grating profile metrology has also been conducted using cleaving techniques. Finally, we show the deposit of fiducials (i.e. centering marks) with Aerosol Jet Printing (AJP). We conclude with the ultimate coronagraph expected performances.", "date": "2012-09-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84468K", "id_number": "CaltechAUTHORS:20150521-133310682", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-133310682", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Belgian Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA) and Fonds de solidarit\u00e9 ULg" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.926494", "primary_object": { "basename": "396464.pdf", "url": "https://authors.library.caltech.edu/records/j52ej-m7024/files/396464.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Delacroix, C.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k7fxj-e1342", "eprint_id": 57761, "eprint_status": "archive", "datestamp": "2023-08-19 12:51:55", "lastmod": "2024-01-13 16:19:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "Frederic Y. J." } }, { "id": "Bourget-P", "name": { "family": "Bourget", "given": "Pierre" } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien" }, "orcid": "0000-0001-8627-0404" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Conceptual study for a sub-pupil instrument having 4 high order adaptive optics paths for parallel multi-wavelength high contrast imaging, and medium resolution spectrometry", "ispublished": "unpub", "full_text_status": "public", "keywords": "high contrast imaging, coronagraphy, adaptive optics, exoplanet", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 24, 2012.\n\nPublished - 396466.pdf
", "abstract": "We present the concept of an instrument that will create 4 circular sub-pupils of 3 m in diameter. Each sub-pupil path will be corrected by a high order adaptive optics system (SR~80% in H) without spider and M2 obstruction. These four independent channels, obviously all pointed towards the same field, allows the possibility of covering totally different parts of the electromagnetic spectrum simultaneously without compromising Signal to Noise Ratio. Each channel can be dedicated to very specialized but complementary purposes: high contrast imaging, pseudo-wide field imaging, high precision multi-color photometry, medium-resolution spectroscopy, polarimetry and sparse-aperture masking.", "date": "2012-09-24", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 7Z", "id_number": "CaltechAUTHORS:20150522-080224076", "isbn": "9780819491473", "book_title": "Ground-based and Airborne Instrumentation for Astronomy IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-080224076", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.927162", "primary_object": { "basename": "396466.pdf", "url": "https://authors.library.caltech.edu/records/k7fxj-e1342/files/396466.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Gonte, Frederic Y. J.; Bourget, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/r653t-z3z56", "eprint_id": 57744, "eprint_status": "archive", "datestamp": "2023-08-19 12:43:50", "lastmod": "2024-01-13 16:19:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bourget-P", "name": { "family": "Bourget", "given": "P." } }, { "id": "Schuhler-N", "name": { "family": "Schuhler", "given": "N." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Gonte-F-Y-J", "name": { "family": "Gonte", "given": "F." } } ] }, "title": "Extinction controlled Adaptive Mask Coronagraph Lyot and Phase Mask dual concept for wide extinction area", "ispublished": "unpub", "full_text_status": "public", "keywords": "high-contrast imaging, coronagraphy, polarization, high angular resolution, phase mask, adaptive optics", "note": "2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper Date Published: 13 September 2012.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).", "abstract": "A dual coronagraph based on the Adaptive Mask concept is presented in this paper. A Lyot coronagraph with a variable diameter occulting disk and a nulling stellar coronagraph based on the Adaptive Phase Mask concept using polarization interferometry are presented in this work. Observations on sky and numerical simulations show the usefulness of the proposed method to optimize the nulling efficiency of the coronagraphs. In the case of the phase mask, the active control system will correct for the detrimental effects of image instabilities on the destructive interference (low-order aberrations such as tip-tilt and focus). The phase mask adaptability both in size, phase and amplitude also compensate for manufacturing errors of the mask itself, and potentially for chromatic effects. Liquid-crystal properties are used to provide variable transmission of an annulus around the phase mask, but also to achieve the achromatic \u03c0 phase shift in the core of the PSF by rotating the polarization by 180\u00b0.A compressed mercury (Hg) drop is used as an occulting disk for the Lyot mask, its size control offers an adaptation to the seeing conditions and provides an optimization of the Tip-tilt correction.", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84505I", "id_number": "CaltechAUTHORS:20150521-131825253", "isbn": "9780819491510", "book_title": "Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-131825253", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" } ] }, "contributors": { "items": [ { "id": "Navarro-R", "name": { "family": "Navarro", "given": "Ram\u03ccn" } }, { "id": "Cunningham-C-R", "name": { "family": "Cunningham", "given": "Colin R." } }, { "id": "Prieto-E", "name": { "family": "Prieto", "given": "Eric" } } ] }, "doi": "10.1117/12.927284", "primary_object": { "basename": "396463.pdf", "url": "https://authors.library.caltech.edu/records/r653t-z3z56/files/396463.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Bourget, P.; Schuhler, N.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/w3d64-9m249", "eprint_id": 57788, "eprint_status": "archive", "datestamp": "2023-08-19 12:44:01", "lastmod": "2024-01-13 16:19:47", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Girard-J-H", "name": { "family": "Girard", "given": "Julien H. V." }, "orcid": "0000-0001-8627-0404" }, { "id": "O'Neal-J", "name": { "family": "O'Neal", "given": "Jared" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Marcus" } }, { "id": "Zins-G", "name": { "family": "Zins", "given": "G\u00e9rard" } }, { "id": "Neichel-B", "name": { "family": "Neichel", "given": "Beno\u00eet" } }, { "id": "Kolb-J", "name": { "family": "Kolb", "given": "Johann" } }, { "id": "Christiaens-V", "name": { "family": "Christiaens", "given": "Valentin" }, "orcid": "0000-0002-0101-8814" }, { "id": "Tourneboeuf-M", "name": { "family": "Tourneboeuf", "given": "Martin" } } ] }, "title": "Image quality and high contrast improvements on VLT/NACO", "ispublished": "unpub", "full_text_status": "public", "keywords": "Adaptive Optics, High Angular Resolution, High Contrast Imaging, Very Large Telescope, Infrared\nAstronomy, Phase Diversity, Strehl Ratio, Calibration", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 13, 2012.\n\nJulien Girard would like to acknowledge the whole NACO IOT in particular Lowell Tacconi-Garman who provided very useful feedback on the elaboration of this paper. Finally he thanks ESO Paranal management, Engineering and IOT Coordinator Alain Smette for their valuable support. We are also thankful to Markus Hartung who shared his experience with us, Fran\u00e7ois Rigaut and Damien Gratadour who worked on Yorick/OPRA with Benoit Neichel.\n\nPublished - 396473.pdf
Submitted - 1210.3090v1.pdf
", "abstract": "NACO is the famous and versatile diffraction limited NIR imager and spectrograph at the VLT with which ESO celebrated 10 years of Adaptive Optics. Since two years a substantial effort has been put in understanding and fixing issues that directly affect the image quality and the high contrast performances of the instrument. Experiments to compensate the non-common-path aberrations and recover the highest possible Strehl ratios have been carried out successfully and a plan is hereafter described to perform such measurements regularly. The drift associated to pupil tracking since 2007 was fixed in october 2011. NACO is therefore even more suited for high contrast imaging and can be used with coronagraphic masks in the image plane. Some contrast measurements are shown and discussed. The work accomplished on NACO will serve as reference for the next generation instruments on the VLT, especially the ones working at the diffraction limit and making use of angular differential imaging (i.e. SPHERE, VISIR, and possibly ERIS).", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84470L", "id_number": "CaltechAUTHORS:20150526-073807198", "isbn": "978-0-8194-9148-0", "book_title": "Adaptive Optics Systems III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-073807198", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellerbroek", "given": "Brent L." } }, { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.925660", "primary_object": { "basename": "1210.3090v1.pdf", "url": "https://authors.library.caltech.edu/records/w3d64-9m249/files/1210.3090v1.pdf" }, "related_objects": [ { "basename": "396473.pdf", "url": "https://authors.library.caltech.edu/records/w3d64-9m249/files/396473.pdf" } ], "resource_type": "book_section", "pub_year": "2012", "author_list": "Girard, Julien H. V.; O'Neal, Jared; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/av6q7-tev72", "eprint_id": 57779, "eprint_status": "archive", "datestamp": "2023-08-19 12:43:55", "lastmod": "2024-01-13 16:19:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "Peter R." } }, { "id": "Poyneer-L", "name": { "family": "Poyneer", "given": "Lisa" } }, { "id": "Barrett-H", "name": { "family": "Barrett", "given": "Harrison" } }, { "id": "Frazin-R", "name": { "family": "Frazin", "given": "Richard" } }, { "id": "Caucci-L", "name": { "family": "Caucci", "given": "Luca" } }, { "id": "Devaney-N", "name": { "family": "Devaney", "given": "Nicholas" } }, { "id": "Furenlid-L", "name": { "family": "Furenlid", "given": "Lars" } }, { "id": "G\u0142adysz-S", "name": { "family": "G\u0142adysz", "given": "Szymon" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Maire-J", "name": { "family": "Maire", "given": "J\u00e9r\u00f4me" } }, { "id": "Marois-C", "name": { "family": "Marois", "given": "Christian" }, "orcid": "0000-0002-4164-4182" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "David" } }, { "id": "Mugnier-L", "name": { "family": "Mugnier", "given": "Laurent" } }, { "id": "Pearson-I", "name": { "family": "Pearson", "given": "Iain" } }, { "id": "Perrin-M-D", "name": { "family": "Perrin", "given": "Marshall" }, "orcid": "0000-0002-3191-8151" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Savransky-D", "name": { "family": "Savransky", "given": "Dmitry" } } ] }, "title": "On Advanced Estimation Techniques for Exoplanet Detection and Characterization Using Ground-based Coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Exoplanets, coronagraphs, adaptive optics, instrumentation, theory", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nThis work was undertaken with support of a seed grant from the National Academies Keck Futures Initiative. Work at the University of Arizona was supported in part by the National Institutes of Health under grant no. 2R01EB000803-21. The authors are extremely grateful for data for Figure 1 provided by the following individuals: Markus Kasper\n(ESO)for ELT-EPICS; John Krist (JPL/Caltech) for JWST NIRCam and HST/ACS curves; Bruce Macintosh (UC Santa Cruz) for TMT PFI data; Christian Marois (HIA, NRC) for the K-band data for Keck NIRC2; Dimitri Mawet (ESO) for the K-band data for VLT-NACO, and the H-band curve for the Palomar Well-Corrected Sub-aperture; GPI data downloaded from planetimager.org, corresponding to predictions by McBride; Dino Mesa (INAF) for the data for the Integral Field Spectrograph of VLT-SPHERE;28 and Ben Oppenheimer (AMNH) for the curve for Project 1640. Figure 1 was partly inspired by a previous illustration by Wesley Traub and John Trauger (JPL). This work was partly conducted at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Reference in this paper to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory, California Institute of Technology.\n\nPublished - 396472.pdf
", "abstract": "The direct imaging of planets around nearby stars is exceedingly difficult. Only about 14 exoplanets have been imaged to date that have masses less than 13 times that of Jupiter. The next generation of planet-finding coronagraphs, including VLT-SPHERE, the Gemini Planet Imager, Palomar P1640, and Subaru HiCIAO have predicted contrast performance of roughly a thousand times less than would be needed to detect Earth-like planets. In this paper we review the state of the art in exoplanet imaging, most notably the method of Locally Optimized Combination of Images (LOCI), and we investigate the potential of improving the detectability of faint exoplanets through the use of advanced statistical methods based on the concepts of the ideal observer and the Hotelling observer. We propose a formal comparison of techniques using a blind data challenge with an evaluation of performance using the Receiver Operating Characteristic (ROC) and Localization ROC (LROC) curves. We place particular emphasis on the understanding and modeling of realistic sources of measurement noise in ground-based AO-corrected coronagraphs. The work reported in this paper is the result of interactions between the co-authors during a week-long workshop on exoplanet imaging that was held in Squaw Valley, California, in March of 2012.", "date": "2012-09-13", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 844722", "id_number": "CaltechAUTHORS:20150522-112029062", "isbn": "9780819491480", "book_title": "Adaptive Optics Systems III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-112029062", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "National Academies Keck Futures Initiative" }, { "agency": "NIH", "grant_number": "2R01EB000803-21" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellerbroek", "given": "Brent L." } }, { "id": "Marchetti-E", "name": { "family": "Marchetti", "given": "Enrico" } }, { "id": "V\u00e9ran-J-P", "name": { "family": "V\u00e9ran", "given": "Jean-Pierre" } } ] }, "doi": "10.1117/12.925099", "primary_object": { "basename": "396472.pdf", "url": "https://authors.library.caltech.edu/records/av6q7-tev72/files/396472.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Lawson, Peter R.; Poyneer, Lisa; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/as236-25e08", "eprint_id": 57856, "eprint_status": "archive", "datestamp": "2023-08-19 12:34:58", "lastmod": "2023-10-23 17:49:41", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kasper-M", "name": { "family": "Kasper", "given": "Markus" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Gearing up the SPHERE", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2012 European Southern Observatory.\n\nPublished - messenger-no149-17-21.pdf
", "abstract": "Direct imaging and spectral characterisation of exoplanets is one of the most exciting, but also one of the most challenging areas, in modern astronomy. The challenge is to overcome the very large contrast between the host star and its planet seen at very small angular separations. This article reports on the progress made in the construction of the second generation VLT instrument SPHERE, the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument. SPHERE is expected to be commissioned on the VLT in 2013.", "date": "2012-09", "date_type": "published", "publication": "Messenger", "volume": "149", "number": "9", "publisher": "European Southern Observatory", "pagerange": "17-21", "id_number": "CaltechAUTHORS:20150527-111427432", "issn": "0722-6691", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-111427432", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "messenger-no149-17-21.pdf", "url": "https://authors.library.caltech.edu/records/as236-25e08/files/messenger-no149-17-21.pdf" }, "resource_type": "article", "pub_year": "2012", "author_list": "Kasper, Markus and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dv0z5-fg196", "eprint_id": 57713, "eprint_status": "archive", "datestamp": "2023-08-19 12:34:53", "lastmod": "2023-10-23 17:39:55", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Chauvin-G", "name": { "family": "Chauvin", "given": "G." } }, { "id": "Bonnefoy-M", "name": { "family": "Bonnefoy", "given": "M." }, "orcid": "0000-0001-5579-5339" } ] }, "title": "Impact of angular differential imaging on circumstellar disk images", "ispublished": "pub", "full_text_status": "public", "keywords": "methods: data analysis \u2013 techniques: high angular resolution \u2013 circumstellar matter", "note": "\u00a9 2012 ESO. Article published by EDP Sciences.\n\nReceived 25 May 2012; Accepted 20 July 2012.\n\nWe would like to thank J-C Augereau for letting us use the GRaTer code to simulate fake disk images.\n\nPublished - aa19687-12.pdf
Submitted - 1207.5909v1.pdf
", "abstract": "Context. Direct imaging of circumstellar disks requires high-contrast and high-resolution techniques. The angular differential imaging (ADI) technique is one of them, initially developed for point-like sources but now increasingly applied to extended objects such as disks. This new field of application raises many questions because the disk images reduced with ADI depend strongly on the amplitude of field rotation and the ADI data reduction strategy. Both of them directly affect the disk observable properties. \n\nAims. Our aim is to characterize the applicability and biases of some ADI data reduction strategies for different disk morphologies. A particular emphasis is placed on parameters mostly used for disks such as their surface brightness distribution, their width if the disk is a ring, and local features such as gaps or asymmetries. We first present a general method for predicting and quantifying those biases. In a second step we illustrate them for some widely used ADI algorithms applied to typical debris disk morphologies: inclined rings with various inner/outer slopes and width. Last, our aim is also to propose improvements of classical ADI to limit the biases on extended objects. \n\nMethods. Simulated fake disks seen under various observing conditions were used to reduce ADI data and quantify the resulting biases. These conclusions are complemented by previous results from NaCo L' real-disk images of HR\u20094796A. \n\nResults. As expected, ADI induces flux losses on disks. This makes this technique appropriate only for low- to medium-inclination disks. A theoretical criterion is derived to predict the amount of flux loss for a given disk morphology, and quantitative estimates of the biases are given in some specific configurations. These biases alter the disk observable properties, such as the slopes of the disk surface brightness or the radial/azimuthal extent of the disk. Additionally, this work demonstrates that ADI can very easily create artificial features without involving astrophysical processes. For example, a particularly striking feature appears for a ring when the amplitude of field rotation is too small. The two ring ansae are surrounded by two flux-depleted regions, which makes them appear as bright blobs. This observation does not require any astrophysical process such as dust blown by radiation pressure, as previously proposed in H-band images of HR\u20094796A.\n\nConclusions. The ADI techniques behave as spatial filtering algorithms and can bias disk observables. Therefore, the filtering process needs to be properly calibrated when deriving disk parameters from processed images.", "date": "2012-09", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "545", "publisher": "EDP Sciences", "pagerange": "Art. No. A111", "id_number": "CaltechAUTHORS:20150520-125725911", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-125725911", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/0004-6361/201219687", "primary_object": { "basename": "1207.5909v1.pdf", "url": "https://authors.library.caltech.edu/records/dv0z5-fg196/files/1207.5909v1.pdf" }, "related_objects": [ { "basename": "aa19687-12.pdf", "url": "https://authors.library.caltech.edu/records/dv0z5-fg196/files/aa19687-12.pdf" } ], "resource_type": "article", "pub_year": "2012", "author_list": "Milli, J.; Mouillet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0t7r1-n5b63", "eprint_id": 57735, "eprint_status": "archive", "datestamp": "2023-09-15 05:01:46", "lastmod": "2023-10-23 21:12:38", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Magette-A", "name": { "family": "Magette", "given": "A." } } ] }, "title": "Nijboer-Zernike phase retrieval for high contrast imaging: Principle, on-sky demonstration with NACO, and perspectives in vector vortex coronagraphy", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution; instrumentation: adaptive optics; methods: numerical; techniques: polarimetric", "note": "\u00a9 2012 ESO. Article published by EDP Sciences.\n\nReceived 16 May 2012; accepted 19 July 2012.\n\nThis work received the support of the University of Li\u00e8ge. The authors are grateful to C. Hanot (IAGL), and J. Surdej (IAGL) for the manuscript corrections. The authors wish to thank the referee Wesley Traub for useful comments and corrections. The authors also acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe. This idea dates back to 2005\u22122006 and the first author is grateful to Sect. 17 and the CNAP French commissions for their outstanding recruitment work.\n\nPublished - aa19613-12.pdf
", "abstract": "We introduce a novel phase retrieval method for astronomical applications based on the Nijboer-Zernike (NZ) theory of diffraction. We present a generalized NZ phase retrieval process that is not limited to small and symmetric aberrations and can therefore be directly applied to astronomical imaging instruments. We describe a practical demonstration of this novel method that was recently performed using data taken on-sky with NAOS-CONICA, the adaptive optics system of the Very Large Telescope. This demonstration presents the first online on-sky phase retrieval results ever obtained, and allows us to plan subsequent refinements on a well-tested basis. Among the potential refinements, and within the framework of high-contrast imaging of extra-solar planetary systems (which requires exquisite wavefront quality), we introduce an extension of the generalized NZ to the high-dynamic range case, and particularly to its use with the vector vortex coronagraph. This induces conjugated phase ramps applied to the orthogonal circular polarizations, which can be used to instantaneously retrieve the complex amplitude of the field, yielding a real-time calibration of the wavefront that does not need any other modulation such as focus or other deformable mirror probe patterns. Paper II (Riaud et al. 2012, A&A, 545, A151) presents the mathematical and practical details of the new method.", "date": "2012-09", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "545", "publisher": "EDP Sciences", "pagerange": "Art. No. A150", "id_number": "CaltechAUTHORS:20150521-095300974", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-095300974", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "University of Li\u00e8ge" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201219613", "primary_object": { "basename": "aa19613-12.pdf", "url": "https://authors.library.caltech.edu/records/0t7r1-n5b63/files/aa19613-12.pdf" }, "resource_type": "article", "pub_year": "2012", "author_list": "Riaud, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cxq43-xn643", "eprint_id": 57763, "eprint_status": "archive", "datestamp": "2023-09-15 05:01:53", "lastmod": "2024-01-13 16:19:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Gordon-B", "name": { "family": "Gordon", "given": "Brian" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Complex apodization Lyot coronagraphy for the direct imaging of exoplanet systems: design, fabrication, and laboratory demonstration", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nWe thank Peter Lawson and the TDEM Technology Assessment Committee for their valuable comments and critical review of this work. We acknowledge the support provided by Brian Kern, Albert Niessner, and the ExEP HCIT infrastructure team during the laboratory demonstrations. The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396468.pdf
", "abstract": "We review the design, fabrication, performance, and future prospects for a complex apodized Lyot coronagraph for highcontrast exoplanet imaging and spectroscopy. We present a newly designed circular focal plane mask with an inner working angle of 2.5 \u03bb/D. Thickness-profiled metallic and dielectric films superimposed on a glass substrate provide control over both the real and imaginary parts of the coronagraph wavefront. Together with a deformable mirror for control of wavefront phase, the complex Lyot coronagraph potentially exceeds billion-to-one contrast over dark fields extending to within angular separations of 2.5 \u03bb/D from the central star, over spectral bandwidths of 20% or more, and with throughput efficiencies better than 50%. Our approach is demonstrated with a linear occulting mask, for which we report our best laboratory imaging contrast achieved to date. Raw image contrasts of 3\u00d710^(-10) over 2% bandwidths, 6\u00d710^(-10) over 10% bandwidths, and 2\u00d710^(-9) over 20% bandwidths are consistently achieved across high contrast fields extending from an inner working angle of 3 \u03bb/D to a radius of 15 \u03bb/D. Occulter performance is analyzed in light of experiments and optical models, and prospects for further progress are summarized. The science capability of the hybrid Lyot coronagraph is compared with requirements for ACCESS, a representative space coronagraph concept for the direct imaging and spectroscopy of exoplanet systems. This work has been supported by NASA's Strategic Astrophysics Technology / Technology Demonstrations for Exoplanet Missions (SAT/TDEM) program.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84424Q", "id_number": "CaltechAUTHORS:20150522-081604588", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-081604588", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.926663", "primary_object": { "basename": "396468.pdf", "url": "https://authors.library.caltech.edu/records/cxq43-xn643/files/396468.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Trauger, John; Moody, Dwight; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/tebj6-5h298", "eprint_id": 57766, "eprint_status": "archive", "datestamp": "2023-09-15 05:02:05", "lastmod": "2024-01-13 16:19:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Murakami-Naoshi", "name": { "family": "Murakami", "given": "Naoshi" } }, { "id": "Nishikawa-Jun", "name": { "family": "Nishikawa", "given": "Jun" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley A." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Kern-B-D", "name": { "family": "Kern", "given": "Brian D." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Hamaguchi-Shoki", "name": { "family": "Hamaguchi", "given": "Shoki" } }, { "id": "Oshiyama-Fumika", "name": { "family": "Oshiyama", "given": "Fumika" } }, { "id": "Sakamoto-Moritsugu", "name": { "family": "Sakamoto", "given": "Moritsugu" } }, { "id": "Ise-Akitoshi", "name": { "family": "Ise", "given": "Akitoshi" } }, { "id": "Oka-Kazuhiko", "name": { "family": "Oka", "given": "Kazuhiko" } }, { "id": "Baba-Naoshi", "name": { "family": "Baba", "given": "Naoshi" } }, { "id": "Murakami-Hiroshi", "name": { "family": "Murakami", "given": "Hiroshi" } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "Motohide" }, "orcid": "0000-0002-6510-0681" } ] }, "title": "Coronagraph focal-plane phase masks based on photonic crystal technology: recent progress and observational strategy", "ispublished": "unpub", "full_text_status": "public", "keywords": "high-contrast imaging, extrasolar planets, photonic crystal, coronagraphy, eight-octant phase-mask coronagraph, vector vortex coronagraph, polarization", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nWe acknowledge Takayuki Kawashima of the Photonic Lattice Inc. for providing us with useful information on a photonic-crystal device. This works were carried out at the Hokkaido University, and at the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA). This research was partially supported by the National Astronomical Observatory of Japan (NAOJ), the Japan Aerospace Exploration Agency (JAXA), and the Japan Society for the Promotion of Science (JSPS) through KAKENHI (21340041, 23740139). MT is supported by KAKENHI 22000005.\n\nPublished - 396470.pdf
", "abstract": "Photonic crystal, an artificial periodic nanostructure of refractive indices, is one of the attractive technologies for coronagraph focal-plane masks aiming at direct imaging and characterization of terrestrial extrasolar planets. We manufactured the eight-octant phase mask (8OPM) and the vector vortex coronagraph (VVC) mask very precisely using the photonic crystal technology. Fully achromatic phase-mask coronagraphs can be realized by applying appropriate polarization filters to the masks. We carried out laboratory experiments of the polarization-filtered 8OPM coronagraph using the High-Contrast Imaging Testbed (HCIT), a state-of-the-art coronagraph simulator at the Jet Propulsion Laboratory (JPL). We report the experimental results of 10-8-level contrast across several wavelengths over 10% bandwidth around 800nm. In addition, we present future prospects and observational strategy for the photonic-crystal mask coronagraphs combined with differential imaging techniques to reach higher contrast. We proposed to apply the polarization-differential imaging (PDI) technique to the VVC, in which we built a two-channel coronagraph using polarizing beam splitters to avoid a loss of intensity due to the polarization filters. We also proposed to apply the angular-differential imaging (ADI) technique to the 8OPM coronagraph. The 8OPM/ADI mode mitigates an intensity loss due to a phase transition of the mask and provides a full field of view around central stars. We present results of preliminary laboratory demonstrations of the PDI and ADI observational modes with the phase-mask coronagraphs.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 824205", "id_number": "CaltechAUTHORS:20150522-085433692", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-085433692", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "National Astronomical Observatory of Japan" }, { "agency": "Japan Aerospace Exploration Agency (JAXA)" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "21340041" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "23740139" }, { "agency": "Japan Society for the Promotion of Science (JSPS)", "grant_number": "22000005" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.925613", "primary_object": { "basename": "396470.pdf", "url": "https://authors.library.caltech.edu/records/tebj6-5h298/files/396470.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Murakami, Naoshi; Nishikawa, Jun; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9dkxk-8xj54", "eprint_id": 57765, "eprint_status": "archive", "datestamp": "2023-09-15 05:01:59", "lastmod": "2024-01-13 16:19:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "Stephen" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Bryden-G", "name": { "family": "Bryden", "given": "Geoffrey" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Chen-Pin", "name": { "family": "Chen", "given": "Pin" } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stuchlik-D", "name": { "family": "Stuchlik", "given": "David" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Coronagraphic Imaging of Debris Disks From a High Altitude Balloon Platform", "ispublished": "unpub", "full_text_status": "public", "keywords": "Suborbital, Coronagraph, Debris Disks, Exoplanets", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nSome of the research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396469.pdf
", "abstract": "Debris disks around nearby stars are tracers of the planet formation process, and they are a key element of our understanding of the formation and evolution of extrasolar planetary systems. With multi-color images of a significant number of disks, we can probe important questions: can we learn about planetary system evolution; what materials are the disks made of; and can they reveal the presence of planets? Most disks are known to exist only through their infrared flux excesses as measured by the Spitzer Space Telescope, and through images measured by Herschel. The brightest, most extended disks have been imaged with HST, and a few, such as Fomalhaut, can be observed using ground-based telescopes. But the number of good images is still very small, and there are none of disks with densities as low as the disk associated with the asteroid belt and Edgeworth\u00ad Kuiper belt in our own Solar System. Direct imaging of disks is a major observational challenge, demanding high angular resolution and extremely high dynamic range close to the parent star. The ultimate experiment requires a space-based platform, but demonstrating much of the needed technology, mitigating the technical risks of a space-based coronagraph, and performing valuable measurements of circumstellar debris disks, can be done from a high-altitude balloon platform. In this paper we present a balloon-borne telescope concept based on the Zodiac II design that could undertake compelling studies of a sample of debris disks.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 84420G", "id_number": "CaltechAUTHORS:20150522-083914095", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-083914095", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } } ] }, "doi": "10.1117/12.924175", "primary_object": { "basename": "396469.pdf", "url": "https://authors.library.caltech.edu/records/9dkxk-8xj54/files/396469.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Unwin, Stephen; Traub, Wesley; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/khjmw-f5n45", "eprint_id": 57778, "eprint_status": "archive", "datestamp": "2023-08-19 12:22:35", "lastmod": "2024-01-13 16:19:43", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "Peter" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Krist-John-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "James K." } } ] }, "title": "Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, coronagraphy, inner working angle, adaptive optics, observing strategy, post-processing", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). August 22, 2012.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile), and the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA). The first author is grateful to the organizers and participants of the Exoplanet Imaging Workshop held 25-30 March 2012 at the Resort at Squaw Creek, California.\n\nPublished - 396471.pdf
Submitted - 1207.5481v1.pdf
", "abstract": "Small-angle coronagraphy is technically and scientifically appealing because it enables the use of smaller telescopes, allows covering wider wavelength ranges, and potentially increases the yield and completeness of circumstellar environment \u2013 exoplanets and disks \u2013 detection and characterization campaigns. However, opening up this new parameter space is challenging. Here we will review the four posts of high contrast imaging and their intricate interactions at very small angles (within the first 4 resolution elements from the star). The four posts are: choice of coronagraph, optimized wavefront control, observing strategy, and post-processing methods. After detailing each of the four foundations, we will present the lessons learned from the 10+ years of operations of zeroth and first-generation adaptive optics systems. We will then tentatively show how informative the current integration of second-generation adaptive optics system is, and which lessons can already be drawn from this fresh experience. Then, we will review the current state of the art, by presenting world record contrasts obtained in the framework of technological demonstrations for space-based exoplanet imaging and characterization mission concepts. Finally, we will conclude by emphasizing the importance of the cross-breeding between techniques developed for both ground-based and space-based projects, which is relevant for future high contrast imaging instruments and facilities in space or on the ground.", "date": "2012-08-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 844204", "id_number": "CaltechAUTHORS:20150522-110016428", "isbn": "9780819491435", "book_title": "Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150522-110016428", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "Fazio-G-G", "name": { "family": "Fazio", "given": "Giovanni G." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M. Jr." } } ] }, "doi": "10.1117/12.927245", "primary_object": { "basename": "1207.5481v1.pdf", "url": "https://authors.library.caltech.edu/records/khjmw-f5n45/files/1207.5481v1.pdf" }, "related_objects": [ { "basename": "396471.pdf", "url": "https://authors.library.caltech.edu/records/khjmw-f5n45/files/396471.pdf" } ], "resource_type": "book_section", "pub_year": "2012", "author_list": "Mawet, Dimitri; Lawson, Peter; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qm1hg-9yf05", "eprint_id": 57727, "eprint_status": "archive", "datestamp": "2023-08-22 06:20:52", "lastmod": "2023-10-23 17:42:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Montagnier-G", "name": { "family": "Montagnier", "given": "G." } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Ducourant-C", "name": { "family": "Ducourant", "given": "C." }, "orcid": "0000-0003-4843-8979" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "R\u00f6ttinger-S", "name": { "family": "R\u00f6ttinger", "given": "S." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "J." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" } ] }, "title": "Direct imaging of extra-solar planets in star forming regions: Lessons learned from a false positive around IM Lupi", "ispublished": "pub", "full_text_status": "public", "keywords": "planet-disk interactions; stars: variables: T Tauri, Herbig Ae/Be; planetary systems; stars: individual: IM Lup; infrared: planetary systems; techniques: high angular resolution", "note": "\u00a9 2012 ESO.\n\nReceived 23 May 2012; Accepted 20 July 2012.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile), and the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA). O.A. and J.S. acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe. This research has made use of the NASA/IPAC/NExScI Star and Exoplanet Database, which is operated by the JPL, Caltech, under contract with NASA, and NASA's Astrophysics Data System and of the SIMBAD database, operated at CDS (Strasbourg, France).\n\nPublished - aa19662-12.pdf
Accepted Version - 1207.6017v2.pdf
", "abstract": "Context. Most exoplanet imagers consist of ground-based adaptive optics coronagraphic cameras which are currently limited in contrast, sensitivity and astrometric precision, but advantageously observe in the near-infrared window (1\u20135 \u2009 \u03bcm). Because of these practical limitations, our current observational aim at detecting and characterizing planets puts heavy constraints on target selection, observing strategies, data reduction, and follow-up. Most surveys so far have thus targeted young systems (1\u2013100 Myr) to catch the putative remnant thermal radiation of giant planets, which peaks in the near-infrared. They also favor systems in the solar neighborhood (d < 80 pc), which eases angular resolution requirements but also ensures a good knowledge of the distance and proper motion, which are critical to secure the planet status, and enable subsequent characterization. \nAims. Because of their youth, it is very tempting to target the nearby star forming regions, which are typically twice as far as the bulk of objects usually combed for planets by direct imaging. Probing these interesting reservoirs sets additional constraints that we review in this paper by presenting the planet search that we initiated in 2008 around the disk-bearing T Tauri star IM Lup, which is part of the Lupus star forming region (140\u2013190 pc).\nMethods. We show and discuss why age determination, the choice of evolutionary model for both the central star and the planet, precise knowledge of the host star proper motion, relative or absolute (between different instruments) astrometric accuracy (including plate scale calibration), and patience are the key ingredients for exoplanet searches around more distant young stars.\nResults. Unfortunately, most of the time, precision and perseverance are not paying off: we discovered a candidate companion around IM Lup in 2008, which we report here to be an unbound background object. We nevertheless review in details the lessons learned from our endeavor, and additionally present the best detection limits ever calculated for IM Lup. We also accessorily report on the successful use of innovative data reduction techniques, such as the damped-LOCI and iterative roll subtraction.", "date": "2012-08", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "544", "publisher": "EDP Sciences", "pagerange": "Art. No. A131", "id_number": "CaltechAUTHORS:20150520-165751557", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-165751557", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201219662", "primary_object": { "basename": "1207.6017v2.pdf", "url": "https://authors.library.caltech.edu/records/qm1hg-9yf05/files/1207.6017v2.pdf" }, "related_objects": [ { "basename": "aa19662-12.pdf", "url": "https://authors.library.caltech.edu/records/qm1hg-9yf05/files/aa19662-12.pdf" } ], "resource_type": "article", "pub_year": "2012", "author_list": "Mawet, D.; Absil, O.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/khtar-r9d82", "eprint_id": 57742, "eprint_status": "archive", "datestamp": "2023-08-22 06:20:59", "lastmod": "2023-10-23 17:43:01", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Augereau-J-C", "name": { "family": "Augereau", "given": "J.-C." } }, { "id": "Lagrange-A-M", "name": { "family": "Lagrange", "given": "A.-M." } }, { "id": "Milli-J", "name": { "family": "Milli", "given": "J." }, "orcid": "0000-0001-9325-2511" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mouillet-D", "name": { "family": "Mouillet", "given": "D." } }, { "id": "Lebreton-J", "name": { "family": "Lebreton", "given": "J." }, "orcid": "0000-0003-1476-5963" }, { "id": "Maire-A-L", "name": { "family": "Maire", "given": "A.-L." }, "orcid": "0000-0002-2591-4138" } ] }, "title": "Morphology of the very inclined debris disk around HD\u200932297", "ispublished": "pub", "full_text_status": "public", "keywords": "stars: individual: HD 32297; stars: early-type; techniques: image processing; techniques: high angular resolution", "note": "\u00a9 2012 ESO.\n\nReceived 30 March 2012; Accepted 27 June 2012.\n\nWe would like to thank G. Montagnier at ESO for conducting these observations and A. Lecavelier des Etangs for helpful discussions. We also thanks the referee for a very detailed and useful report.\n\nPublished - aa19320-12.pdf
Accepted Version - 1206.6334v1.pdf
", "abstract": "Context. Direct imaging of circumstellar disks at high angular resolution is mandatory to provide morphological information that constrains their properties, in particular the spatial distribution of dust. For a long time, this challenging objective was, in most cases, only within the realm of space telescopes from the visible to the infrared. New techniques combining observing strategy and data processing now allow very high-contrast imaging with 8-m class ground-based telescopes (10^(-4) to 10^(-5) at ~1\u2032\u2032) and complement space telescopes while improving angular resolution at near infrared wavelengths. \nAims. We present the results of a program carried out at the VLT with NACO to image known debris disks with higher angular resolution in the near-infrared than ever before in order to study morphological properties and ultimately detect the signpost of planets.\nMethods. The observing method makes use of advanced techniques of adaptive optics, coronagraphy, and differential imaging, a combination designed to directly image exoplanets with the upcoming generation of \"planet finders\" such as GPI (Gemini Planet Imager) and SPHERE (Spectro-Polarimetric High contrast Exoplanet REsearch). Applied to extended objects such as circumstellar disks, the method is still successful but produces significant biases in terms of photometry and morphology. We developed a new model-matching procedure to correct for these biases and hence provide constraints on the morphology of debris disks.\nResults. From our program, we present new images of the disk around the star HD\u200932297 obtained in the H (1.6 \u03bcm) and Ks (2.2 \u03bcm) bands with an unprecedented angular resolution (~65 mas). The images show an inclined thin disk detected at separations larger than 0.5\u22120.6\u2033. The modeling stage confirms a very high inclination (i = 88\u00b0) and the presence of an inner cavity inside r0 \u2248 110\u2009AU. We also find that the spine (line of maximum intensity along the midplane) of the disk is curved, which we attribute to a large anisotropic scattering-factor (g \u2248 0.5, which is valid for an non-edge-on disk). \nConclusions. Our modeling procedure is relevant to interpreting images of circumstellar disks observed with angular differential imaging. It allows us to both reduce the biases and estimate the disk parameters.", "date": "2012-08", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "544", "publisher": "EDP Sciences", "pagerange": "Art. No. A85", "id_number": "CaltechAUTHORS:20150521-123702227", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-123702227", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/0004-6361/201219320", "primary_object": { "basename": "1206.6334v1.pdf", "url": "https://authors.library.caltech.edu/records/khtar-r9d82/files/1206.6334v1.pdf" }, "related_objects": [ { "basename": "aa19320-12.pdf", "url": "https://authors.library.caltech.edu/records/khtar-r9d82/files/aa19320-12.pdf" } ], "resource_type": "article", "pub_year": "2012", "author_list": "Boccaletti, A.; Augereau, J.-C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yqpqh-69t55", "eprint_id": 57734, "eprint_status": "archive", "datestamp": "2023-08-19 09:17:26", "lastmod": "2023-10-23 17:42:40", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Magette-A", "name": { "family": "Magette", "given": "A." } } ] }, "title": "Instantaneous phase retrieval with the vector vortex coronagraph: Theoretical and optical implementation", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2012 ESP. Article published by EDP Sciences.\n\nReceived 16 May 2012; Accepted 19 July 2012.\n\nThis work received the support of the University of Li\u00e8ge. This work was partly carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile). The authors are grateful to C. Hanot (IAGL), D. Defr\u00e8re (MPI-RA) for manuscript corrections. The authors wish to thank the referee Wesley Traub for his useful comments and corrections. The authors also acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe. This idea dates back to 2005-2006 and the first author is grateful to section 17 and the CNAP French commissions for their outstanding recruitment work.\n\nPublished - aa19614-12.pdf
", "abstract": "Coronagraphs are used as high-contrast imaging tools. However, it is well-known that the achievable contrast is primarily limited by wavefront aberrations in the optical train. Various kinds of devices and methods have been proposed to correct and calibrate these errors and, hence, improve the efficiency of coronagraphs. Here, we present an innovative idea that allows instantaneous measuring of the phase and the amplitude of residual stellar speckles in coronagraphic images. The technique is based on the unique polarization properties of the vector vortex coronagraph, which serves as a new type of phase diversity (POAM diversity), as well an extension of the Nijboer-Zernike theory of aberrations. We also propose and discuss a simple practical optical implementation of the technique, which only requires polarization splitting at the back-end of any existing vector vortex coronagraph systems.", "date": "2012", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "545", "publisher": "EDP Sciences", "pagerange": "Art. No. A151", "id_number": "CaltechAUTHORS:20150521-095215397", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-095215397", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "University of Li\u00e8ge" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "doi": "10.1051/0004-6361/201219614", "primary_object": { "basename": "aa19614-12.pdf", "url": "https://authors.library.caltech.edu/records/yqpqh-69t55/files/aa19614-12.pdf" }, "resource_type": "article", "pub_year": "2012", "author_list": "Riaud, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/9d4te-8zy05", "eprint_id": 57651, "eprint_status": "archive", "datestamp": "2023-08-19 09:17:21", "lastmod": "2024-01-13 16:18:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martayan-C", "name": { "family": "Martayan", "given": "C." } }, { "id": "Lobel-A", "name": { "family": "Lobel", "given": "A." } }, { "id": "Baade-D", "name": { "family": "Baade", "given": "D." } }, { "id": "Blomme-R", "name": { "family": "Blomme", "given": "R." } }, { "id": "Fr\u00e9mat-Y", "name": { "family": "Fr\u00e9mat", "given": "Y." } }, { "id": "LeBouqin-J-B", "name": { "family": "LeBouquin", "given": "J.-B." } }, { "id": "Selman-F", "name": { "family": "Selman", "given": "F." } }, { "id": "Girard-J-H", "name": { "family": "Girard", "given": "J." }, "orcid": "0000-0001-8627-0404" }, { "id": "M\u00e9rand-A", "name": { "family": "M\u00e9rand", "given": "A." } }, { "id": "Montagnier-G", "name": { "family": "Montagnier", "given": "G." } }, { "id": "Patru-F", "name": { "family": "Patru", "given": "F." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Martins-F", "name": { "family": "Martins", "given": "F." } }, { "id": "Rivinius-Th", "name": { "family": "Rivinius", "given": "Th." } }, { "id": "\u0160tefl-S", "name": { "family": "\u0160tefl", "given": "S." } }, { "id": "Zorec-J", "name": { "family": "Zorec", "given": "J." } }, { "id": "Semaan-T", "name": { "family": "Semaan", "given": "T." } }, { "id": "Mehner-A", "name": { "family": "Mehner", "given": "A." }, "orcid": "0000-0002-9564-3302" }, { "id": "Kervella-P", "name": { "family": "Kervella", "given": "P." }, "orcid": "0000-0003-0626-1749" }, { "id": "Sana-H", "name": { "family": "Sana", "given": "H." } }, { "id": "Sch\u00f6del-R", "name": { "family": "Sch\u00f6del", "given": "R." } } ] }, "title": "On the Binarity of LBV Stars", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2012 Astronomical Society of the Pacific. \n\nObservations were carried out under GTO program ID 085.D-0125(A), normal program IDs 085.D-0625(A,B,C), 087.D-0426(A to G). CMa is grateful to ESO colleagues (astronomers, telescope operators, engineers) for their help in this study. This research has made use of the Simbad and Vizier databases maintained at CDS, Strasbourg, France.\n\nPublished - 464-0293.pdf
", "abstract": "We report on the binarity of luminous blue variable stars observed with a set of techniques and instruments. Among them, observations at high angular resolution with the VLT-NACO, the VLTI-AMBER and with spectrographs such as the VLT-XSHOOTER allowed us to find several LBV stars as binaries or having a potential companion. In particular the LBV Pistol Star clearly presents radial velocity variations and line profiles modifications (double peak appearance). In addition, the absorption component of the P Cygni lines varies as well with the time indicating a potential wind structure variability. Our observations also show directly for the first time a companion to at least one of the observed LBVs (HD 168625). This one seems to affect the environment of the system. This system is known to be surrounded by several rings similar to those of SN1987A, possibly indicating a future supernova occurrence for this Galactic object. These results show that Eta Car is no longer unique.", "date": "2012", "date_type": "published", "publisher": "Astronomical Society of the Pacific", "place_of_pub": "San Francisco, CA", "pagerange": "293-330", "id_number": "CaltechAUTHORS:20150519-101639222", "isbn": "978-1-58381-810-7", "book_title": "Circumstellar Dynamics at High Resolution", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-101639222", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Carciofi-A", "name": { "family": "Carciofi", "given": "Alex" } }, { "id": "Rivinius-Th", "name": { "family": "Rivinius", "given": "Thomas" } } ] }, "primary_object": { "basename": "464-0293.pdf", "url": "https://authors.library.caltech.edu/records/9d4te-8zy05/files/464-0293.pdf" }, "resource_type": "book_section", "pub_year": "2012", "author_list": "Martayan, C.; Lobel, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/2cfp3-56y72", "eprint_id": 57830, "eprint_status": "archive", "datestamp": "2023-08-22 04:26:42", "lastmod": "2023-10-23 17:47:22", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High-contrast Stellar Observations within the Diffraction Limit at the Palomar Hale Telescope", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter; infrared: stars; instrumentation: high angular resolution; stars: individual (alpha Boo, alpha Her, beta Peg, beta And, alpha Ori, rho Per, alpha Aur, chi Cyg)", "note": "\u00a9 2011 The American Astronomical Society.\n\nReceived 2011 August 19; Accepted 2011 October 26; Published 2011 December 2.\n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The data presented are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. We thank the Palomar Observatory staff for their assistance in mounting the PFN and conducting the observations at the Hale telescope.\n\nPublished - apj_743_2_178.pdf
", "abstract": "We report on high-accuracy high-resolution (<20 mas) stellar observations obtained with the Palomar Fiber Nuller (PFN), a near-infrared ( 2.2 \u03bcm) interferometric coronagraph installed at the Palomar Hale telescope. The PFN uses destructive interference between two elliptical (3 m \u00d7 1.5 m) sub-apertures of the primary to reach high dynamic range inside the diffraction limit of the full telescope. In order to validate the PFN's instrumental approach and its data reduction strategy, based on the newly developed \"Null Self-Calibration\" (NSC) method, we observed a sample of eight well-characterized bright giants and supergiants. The quantity measured is the source astrophysical null depth, or equivalently the object's visibility at the PFN 3.2 m interferometric baseline. For the bare stars \u03b1 Boo, \u03b1 Her, \u03b2 And, and \u03b1 Aur, PFN measurements are in excellent agreement with previous stellar photosphere measurements from long baseline interferometry. For the mass-losing stars \u03b2 Peg, \u03b1 Ori, \u03c1 Per, and \u03c7 Cyg, circumstellar emission and/or asymmetries are detected. Overall, these early observations demonstrate the PFN's ability to measure astrophysical null depths below 10^(\u20132) (limited by stellar diameters), with 1 \u03c3 uncertainties as low as a few 10^(\u20134). Such visibility accuracy is unmatched at this spatial resolution in the near-infrared and translates into a contrast better than 10^(\u20133) within the diffraction limit. With further improvements anticipated in 2011/2012, a state-of-the-art infrared science camera and a new extreme adaptive optics system, the PFN should provide a unique tool for the detection of hot debris disks and young self-luminous sub-stellar companions in the immediate vicinity of nearby stars.", "date": "2011-12-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "743", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 178", "id_number": "CaltechAUTHORS:20150526-160716486", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-160716486", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/0004-637X/743/2/178", "primary_object": { "basename": "apj_743_2_178.pdf", "url": "https://authors.library.caltech.edu/records/2cfp3-56y72/files/apj_743_2_178.pdf" }, "resource_type": "article", "pub_year": "2011", "author_list": "Mennesson, B.; Hanot, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ng7kx-1q625", "eprint_id": 57794, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:50", "lastmod": "2024-01-13 16:19:55", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Gordon-B", "name": { "family": "Gordon", "given": "Brian" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "A hybrid Lyot coronagraph for the direct imaging and spectroscopy of exoplanet systems: recent results and prospects", "ispublished": "unpub", "full_text_status": "public", "keywords": "exoplanet, coronagraph, active optics", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). September 15, 2011.\n\nThis work has been supported by NASA's Technology Demonstration for Exoplanet Missions (TDEM) program.\nWe acknowledge the support and valuable discussions provided by Brian Kern, Albert Niessner, and the ExEP HCIT\ninfrastructure team during the laboratory demonstrations. The research described in this paper was carried out at the Jet\nPropulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space\nAdministration.\n\nPublished - 396476.pdf
", "abstract": "We report our best laboratory contrast demonstrations achieved to date. We review the design, fabrication, performance, and future prospects of a hybrid focal plane occulter for exoplanet coronagraphy. Composed of thickness-profiled metallic and dielectric thin films vacuum deposited on a fused silica substrate, the hybrid occulter uses two superimposed thin films for control over both the real and imaginary parts of the complex attenuation pattern. Together with a deformable mirror for adjustment of wavefront phase, the hybrid Lyot coronagraph potentially exceeds billion-toone contrast over dark fields extending to within angular separations of 3 \u03bb/D from the central star, over spectral bandwidths of 20% or more, and with throughput efficiencies up to 60%. We report laboratory contrasts of 3\u00d710^(-10) over 2% bandwidths, 6\u00d710^(-10) over 10% bandwidths, and 2\u00d710^(-9) over 20% bandwidths, achieved across high contrast fields extending from an inner working angle of 3 \u03bb/D to a radius of 15 \u03bb/D. Occulter performance is analyzed in light of recent experiments and optical models, and prospects for further improvements are summarized. The science capabilities of the hybrid Lyot coronagraph are compared with requirements of the ACCESS mission, a representative exoplanet space telescope concept study for the direct imaging and spectroscopy of exoplanet systems.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81510G", "id_number": "CaltechAUTHORS:20150526-084726251", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-084726251", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA Technology Demostration for Exoplanet Missions (TDEM) program" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.895032", "primary_object": { "basename": "396476.pdf", "url": "https://authors.library.caltech.edu/records/ng7kx-1q625/files/396476.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Trauger, John; Moody, Dwight; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/dassw-24t60", "eprint_id": 57797, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:55", "lastmod": "2024-01-13 16:19:57", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "title": "Assessing the performance limits of internal coronagraphs through end-to-end modeling: a NASA TDEM study", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraph", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nDate Published: 15 September 2011.\n\nThis work was performed at the Jet Propulsion Laboratory/California Inst. of Tech. and NASA Ames Research Center as part of NASA ROSES 09-TDEM09-0017.\n\nPublished - 396477.pdf
", "abstract": "As part of the NASA ROSES Technology Development for Exoplanet Missions (TDEM) program, we are conducting a study of three internal coronagraphs (PIAA, vector vortex, hybrid bandlimited) to understand their behaviors in realistically-aberrated systems with wavefront control (deformable mirrors). This study consists of two milestones: (1) develop wavefront propagation codes appropriate for each coronagraph that are accurate to 1% or better (compared to a reference algorithm) but are also time and memory efficient, and (2) use these codes to determine the wavefront control limits of each architecture. We discuss the results from the study so far, with emphasis on representing the PIAA coronagraph and its wavefront control behavior.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81510E", "id_number": "CaltechAUTHORS:20150526-090229627", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-090229627", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "JPL/Caltech" }, { "agency": "NASA", "grant_number": "ROSES 09-TDEM09-0017" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.892772", "primary_object": { "basename": "396477.pdf", "url": "https://authors.library.caltech.edu/records/dassw-24t60/files/396477.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Krist, John E.; Belikov, Ruslan; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/wvssm-dv736", "eprint_id": 57792, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:44", "lastmod": "2024-01-13 16:19:51", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "Brian" } }, { "id": "Niessner-A", "name": { "family": "Niessner", "given": "Albert" } }, { "id": "Kuhnert-A", "name": { "family": "Kuhnert", "given": "Andreas" } }, { "id": "Shemo-D-M", "name": { "family": "Shemo", "given": "David" } }, { "id": "Chipman-R", "name": { "family": "Chipman", "given": "Russell" } }, { "id": "McClain-S", "name": { "family": "McClain", "given": "Stephen" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } } ] }, "title": "Recent results of the second generation of vector vortex\n coronagraphs on the high-contrast imaging testbed at JPL", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, vector vortex coronagraph, liquid\ncrystal polymers, wavefront control, electric field conjugation", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). September 15, 2011.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile),\nand the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the\nNational Aeronautics and Space Administration (NASA).\n\nPublished - 396475.pdf
", "abstract": "The Vector Vortex Coronagraph (VVC) is an attractive internal coronagraph solution to image and characterize exoplanets. It provides four key pillars on which efficient high contrast imaging instruments can be built for ground- and space-based telescopes: small inner working angle, high throughput, clear off-axis discovery space, and simple layout. We present the status of the VVC technology development supported by NASA. We will review recent results of the optical tests of the second-generation topological charge 4 VVC on the actively corrected High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Laboratory (JPL). New VVC contrast records have been established.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81511D", "id_number": "CaltechAUTHORS:20150526-083004235", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-083004235", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.896070", "primary_object": { "basename": "396475.pdf", "url": "https://authors.library.caltech.edu/records/wvssm-dv736/files/396475.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Mawet, Dimitri; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6vt3z-ckz97", "eprint_id": 57799, "eprint_status": "archive", "datestamp": "2023-08-19 08:05:00", "lastmod": "2024-01-13 16:19:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "Brian" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Kuhnert-A", "name": { "family": "Kuhnert", "given": "Andreas" } }, { "id": "Levine-Marie", "name": { "family": "Levine", "given": "Marie" } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Mennesson-B", "name": { "family": "Mennensson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Niessner-A", "name": { "family": "Niessner", "given": "Albert" } }, { "id": "Park-P", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Wallace-J-C", "name": { "family": "Wallace", "given": "James" } } ] }, "title": "Taking the vector vortex coronagraph to the next level for\n ground- and space-based exoplanet imaging instruments:\n review of technology developments in the USA, Japan, and Europe", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, polarization, liquid\ncrystal polymers, photonics crystals, subwavelength gratings", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nSeptember 15, 2011.\n\nThis work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile),\nand the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the\nNational Aeronautics and Space Administration (NASA).\n\nPublished - 396478.pdf
", "abstract": "The Vector Vortex Coronagraph (VVC) is one of the most attractive new-generation coronagraphs for ground- and space-based exoplanet imaging/characterization instruments, as recently demonstrated on sky at Palomar and in the laboratory at JPL, and Hokkaido University. Manufacturing technologies for devices covering wavelength ranges from the optical to the mid-infrared, have been maturing quickly. We will review the current status of technology developments supported by NASA in the USA (Jet Propulsion Laboratory-California Institute of Technology, University of Arizona, JDSU and BEAMCo), Europe (University of Li`ege, Observatoire de Paris- Meudon, University of Uppsala) and Japan (Hokkaido University, and Photonics Lattice Inc.), using liquid crystal polymers, subwavelength gratings, and photonics crystals, respectively. We will then browse concrete perspectives for the use of the VVC on upcoming ground-based facilities with or without (extreme) adaptive optics, extremely large ground-based telescopes, and space-based internal coronagraphs.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 815108", "id_number": "CaltechAUTHORS:20150526-091421279", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-091421279", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Southern Observatory (ESO)" }, { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.896059", "primary_object": { "basename": "396478.pdf", "url": "https://authors.library.caltech.edu/records/6vt3z-ckz97/files/396478.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Mawet, Dimitri; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/grnd4-vsb87", "eprint_id": 57789, "eprint_status": "archive", "datestamp": "2023-08-19 08:04:37", "lastmod": "2024-01-13 16:19:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Bryden-G", "name": { "family": "Bryden", "given": "Geoffrey" } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Roberts-L-C-Jr", "name": { "family": "Roberts", "given": "Lewis C., Jr." }, "orcid": "0000-0003-3892-2900" }, { "id": "Bruno-R", "name": { "family": "Bruno", "given": "Robin" } }, { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "Stephen" } }, { "id": "Backovsky-S", "name": { "family": "Backovsky", "given": "Stan" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Charkrabarti-S", "name": { "family": "Chakrabarti", "given": "Supriya" } }, { "id": "Chen-Pin", "name": { "family": "Chen", "given": "Pin" } }, { "id": "Hillenbrand-L-A", "name": { "family": "Hillenbrand", "given": "Lynne" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Lillie-C-F", "name": { "family": "Lillie", "given": "Charles" } }, { "id": "Macintosh-B-A", "name": { "family": "Macintosh", "given": "Bruce" }, "orcid": "0000-0003-1212-7538" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Rahman-Z", "name": { "family": "Rahman", "given": "Zahidul" } }, { "id": "Rey-J", "name": { "family": "Rey", "given": "Justin" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Stuchlik-D", "name": { "family": "Stuchlik", "given": "David" } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Vasisht-G", "name": { "family": "Vasisht", "given": "Gautam" }, "orcid": "0000-0002-1871-6264" } ] }, "title": "Zodiac II: Debris Disk Science from a Balloon", "ispublished": "unpub", "full_text_status": "public", "keywords": "Suborbital, Coronagraph, Disks, Exoplanets", "note": "\u00a9 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 15 September 2011. \n\nSome of the research described in this publication was carried out at the Jet Propulsion Laboratory, California\nInstitute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 396474.pdf
", "abstract": "Zodiac II is a proposed balloon-borne science investigation of debris disks around nearby stars. Debris disks are analogs of the Asteroid Belt (mainly rocky) and Kuiper Belt (mainly icy) in our Solar System. Zodiac II will measure the size, shape, brightness, and color of a statistically significant sample of disks. These measurements will enable us to probe these fundamental questions: what do debris disks tell us about the evolution of planetary systems; how are debris disks produced; how are debris disks shaped by planets; what materials are debris disks made of; how much dust do debris disks make as they grind down; and how long do debris disks live? In addition, Zodiac II will observe hot, young exoplanets as targets of opportunity. The Zodiac II instrument is a 1.1-m diameter SiC telescope and an imaging coronagraph on a gondola carried by a stratospheric balloon. Its data product is a set of images of each targeted debris disk in four broad visiblewavelength bands. Zodiac II will address its science questions by taking high-resolution, multi-wavelength images of the debris disks around tens of nearby stars. Mid-latitude flights are considered: overnight test flights within the United States followed by half-global flights in the Southern Hemisphere. These longer flights are required to fully explore the set of known debris disks accessible only to Zodiac II. On these targets, it will be 100 times more sensitive than the Hubble Space Telescope's Advanced Camera for Surveys (HST/ACS); no existing telescope can match the Zodiac II contrast and resolution performance. A second objective of Zodiac II is to use the near-space environment to raise the Technology Readiness Level (TRL) of SiC mirrors, internal coronagraphs, deformable mirrors, and wavefront sensing and control, all potentially needed for a future space-based telescope for high-contrast exoplanet imaging.", "date": "2011-09-15", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81511E", "id_number": "CaltechAUTHORS:20150526-075815173", "isbn": "978-0-81948-761-2", "book_title": "Techniques and Instrumentation for Detection of Exoplanets V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-075815173", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "doi": "10.1117/12.899688", "primary_object": { "basename": "396474.pdf", "url": "https://authors.library.caltech.edu/records/grnd4-vsb87/files/396474.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Bryden, Geoffrey; Traub, Wesley; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zemb8-hsp10", "eprint_id": 57725, "eprint_status": "archive", "datestamp": "2023-08-19 08:03:17", "lastmod": "2024-01-13 16:19:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ksendzov-A", "name": { "family": "Ksendzov", "given": "A." } } ] }, "title": "Fiber-Based Interferometry and Imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2011 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - 396480.pdf
", "abstract": "Single-mode optical fibers are playing an increasing role in astronomical interferometry, e.g., in high-accuracy visibility measurements and in nulling interferometry. However, such observing modes typically involve only small numbers of fibers. On the other hand, some recently proposed observing techniques call for arrays of single mode fibers coupled to arrays of sub-apertures within a large telescope pupil. The concepts include pupil-masked visibility measurements (non-redundant masking), pupil-sheared nulling interferometry, and coronagraphic imaging using a fiber-linked phased-array of small optical telescopes. The latter arrangement may also be relevant to optical communications. Here we provide an overview of a number of recent novel applications of single-mode fibers and single-mode fiber arrays.", "date": "2011-09-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81460I", "id_number": "CaltechAUTHORS:20150520-152552517", "isbn": "978-0-8194-8756-8", "book_title": "UV/Optical/IR Space Telescopes and Instruments - Innovative Technologies and Concepts V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-152552517", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } } ] }, "doi": "10.1117/12.895268", "primary_object": { "basename": "396480.pdf", "url": "https://authors.library.caltech.edu/records/zemb8-hsp10/files/396480.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, E.; Liewer, K.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4qnd1-f7t54", "eprint_id": 57800, "eprint_status": "archive", "datestamp": "2023-08-19 08:03:23", "lastmod": "2024-01-13 16:20:00", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. K." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Moody-D", "name": { "family": "Moody", "given": "D." } }, { "id": "Kern-B", "name": { "family": "Kern", "given": "B." } } ] }, "title": "Recent Progress in Vector Vortex Coronagraphy", "ispublished": "unpub", "full_text_status": "public", "keywords": "vortex, coronagraphy, exoplanets", "note": "\u00a9 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). September 14, 2011.\n\nThis work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under\ncontract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 396479.pdf
", "abstract": "The optical vortex coronagraph has great potential for enabling high-contrast observations very close to bright stars, and thus for reducing the size of space telescopes needed for exoplanet characterization missions. Here we discuss several recent developments in optical vortex coronagraphy. In particular, we describe multi-stage vortex configurations that allow the use of on-axis telescopes for high-contrast coronagraphy, and also enable the direct measurement of the amplitudes and phases of focal plane speckles. We also briefly describe recent laboratory demonstrations of the optical properties of the dual-stage vortex, and of the broadband performance of single stage vortex masks. Indeed, the demonstrated performance of the vector vortex phase masks already in hand, \u2248 10^(-8), is approximately that needed for an initial coronagraphic mission, such as an exoplanet explorer, aimed at detecting exozodiacal light and jovian exoplanets.", "date": "2011-09-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 81460L", "id_number": "CaltechAUTHORS:20150526-093241463", "isbn": "978-0-8194-8756-8", "book_title": "UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts V", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-093241463", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } }, { "id": "Breckinridge-J-B", "name": { "family": "Breckinridge", "given": "James B." } } ] }, "doi": "10.1117/12.895267", "primary_object": { "basename": "396479.pdf", "url": "https://authors.library.caltech.edu/records/4qnd1-f7t54/files/396479.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jay46-nbd02", "eprint_id": 57806, "eprint_status": "archive", "datestamp": "2023-08-19 07:59:39", "lastmod": "2023-10-23 17:46:15", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" } ] }, "title": "A Dim Candidate Companion to \u03f5 Cephei", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs \u2013 instrumentation: adaptive optics \u2013 instrumentation: high angular resolution \u2013 stars:\nlow-mass \u2013 techniques: high angular resolution", "note": "\u00a9 2011 The American Astronomical Society.\n\nReceived 2011 June 6; accepted 2011 July 5; published 2011 August 12.\n\nThis work was carried out at the European Southern Observatory\n(ESO) site of Vitacura (Santiago, Chile), and the Jet\nPropulsion Laboratory (JPL), California Institute of Technology\n(Caltech), under contract with the National Aeronautics\nand Space Administration (NASA). The data presented in this\nLetter are based on observations obtained at the Hale Telescope,\nPalomar Observatory, as part of a continuing collaboration between\nCaltech, NASA/JPL, and Cornell University. This work\nis also based (in part) on observations made with the Spitzer\nSpace Telescope, which is operated by the JPL, Caltech, under a\ncontract with NASA. This research has made use of the NASA/\nIPAC/NExScI Star and Exoplanet Database, which is operated\nby the JPL, Caltech, under contract with NASA, and NASA's\nAstrophysics Data System and of the SIMBAD database, operated\nat CDS (Strasbourg, France).\n\nPublished - apjl_738_1_12.pdf
Submitted - 1107.3872v1.pdf
", "abstract": "Using a vector vortex coronagraph behind the 1.5 m well-corrected subaperture (WCS) at Palomar, we detected a second object very close to \u03f5 Cephei, a \u03b4 Scuti F0 IV star. The candidate companion, ~50 times fainter than \u03f5 Cephei, if physically associated, is a late-type K or early M star, and lies at an angular separation of 330 mas, or 1.1 \u03bb/D for the WCS, making it the smallest angle detection ever realized with a coronagraph in terms of \u03bb/D units. The projected separation of the putative companion is ~8.6 AU, most likely on a highly eccentric orbit. The recently detected near-infrared excess is thus likely not due to hot dust. Moreover, we also show that the previously reported IRAS 60 \u03bcm excess was due to source confusion on the galactic plane.", "date": "2011-09-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "738", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. L12", "id_number": "CaltechAUTHORS:20150526-104638496", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-104638496", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/2041-8205/738/1/L12", "primary_object": { "basename": "1107.3872v1.pdf", "url": "https://authors.library.caltech.edu/records/jay46-nbd02/files/1107.3872v1.pdf" }, "related_objects": [ { "basename": "apjl_738_1_12.pdf", "url": "https://authors.library.caltech.edu/records/jay46-nbd02/files/apjl_738_1_12.pdf" } ], "resource_type": "article", "pub_year": "2011", "author_list": "Mawet, D.; Mennesson, B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/rtjgk-x5j41", "eprint_id": 57808, "eprint_status": "archive", "datestamp": "2023-08-22 03:15:09", "lastmod": "2023-10-23 17:46:21", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "New Constraints on Companions and Dust within a Few AU of Vega", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter; instrumentation: high angular resolution; stars: individual (Vega)", "note": "\u00a9 2011 The American Astronomical Society.\n\nReceived 2011 March 7; Accepted 2011 April 20; Published 2011 June 29.\n\nBased on observations obtained at the Hale Telescope, Palomar Observatory\nas part of a continuing collaboration between the California Institute of\nTechnology, NASA/JPL, and Cornell University.\n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The data presented are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. We thank the Palomar Observatory staff for their assistance in mounting the PFN and conducting the observations at the Hale telescope.\n\nPublished - apj_736_1_14.pdf
", "abstract": "We report on high contrast near-infrared (~2.2 \u03bcm) observations of Vega obtained with the Palomar Fiber Nuller, a dual sub-aperture rotating coronagraph installed at the Palomar Hale telescope. The data show consistent astrophysical null depth measurements at the 10^(\u20133) level or below for three different baseline orientations spanning 60 deg in azimuth, with individual 1\u03c3 uncertainties \u22647 \u00d7 10^(\u20134). These high cancellation and accuracy levels translate into a dynamic range greater than 1000:1 inside the diffraction limit of the 5 m telescope beam. Such high contrast performance is unprecedented in the near-infrared and provides improved constraints on Vega's immediate ( 20 to 250 mas, or 0.15 to 2 AU) environment. In particular, our measurements rule out any potential companion in the [0.25-1 AU] region contributing more than 1% of the overall near-infrared stellar flux, with limits as low as 0.2% near 0.6 AU. These are the best upper limits established so far by direct detection for a companion to Vega in this inner region. We also conclude that any dust population contributing a significant (\u22651%) near-infrared thermal excess can arise only within 0.2 AU of the star, and that it must consist of much smaller grains than in the solar zodiacal cloud. Dust emission from farther than 2 AU is also not ruled out by our observations, but would have to originate in strong scattering, pointing again to very small grains.", "date": "2011-07-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "736", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 14", "id_number": "CaltechAUTHORS:20150526-121554212", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-121554212", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/0004-637X/736/1/14", "primary_object": { "basename": "apj_736_1_14.pdf", "url": "https://authors.library.caltech.edu/records/rtjgk-x5j41/files/apj_736_1_14.pdf" }, "resource_type": "article", "pub_year": "2011", "author_list": "Mennesson, B.; Serabyn, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/71mc7-3ws76", "eprint_id": 57954, "eprint_status": "archive", "datestamp": "2023-08-19 07:30:36", "lastmod": "2023-10-23 17:56:11", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Phase mask coronagraphy at JPL and Palomar", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2011 Owned by the authors, published by EDP Sciences. This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial License 3.0, which permits unrestricted use, distribution, and reproduction in any noncommercial medium, provided the original work is properly cited. \n\nPublished online: 18 July 2011.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration, and is based on observations obtained on the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between the California Institute of Technology, NASA/JPL and Cornell University.\n\nPublished - epjconf_bdep2009_03004.pdf
", "abstract": "For the imaging of faint companions, phase mask coronagraphy has the dual advantages of a small inner working angle and high throughput. This paper summarizes our recent work in developing phase masks and in demonstrating their capabilities at JPL. Four-quadrant phase masks have been manufactured at JPL by means of both evaporation and etching, and we have been developing liquid crystal vortex phase masks in partnership with a commercial vendor. Both types of mask have been used with our extreme adaptive optics well-corrected subaperture at Palomar to detect known brown dwarf companions as close as ~ 2.5 \u03bb/D to stars. Moreover, our recent vortex masks perform very well in laboratory tests, with a demonstrated infrared contrast of about 10^(\u22126) at 3 \u03bb/D, and contrasts of a few 10^(\u22127) with an initial optical wavelength device. The demonstrated performance already meets the needs of ground-based extreme adaptive optics coronagraphy, and further planned improvements are aimed at reaching the 10^(\u221210) contrast needed for terrestrial exoplanet detection with a space-based coronagraph.", "date": "2011-07-18", "date_type": "published", "publication": "EPJ Web of Conferences", "volume": "16", "publisher": "EDP Sciences", "pagerange": "Art. No. 03004", "id_number": "CaltechAUTHORS:20150602-163115129", "issn": "2101-6275", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150602-163115129", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/epjconf/20111603004", "primary_object": { "basename": "epjconf_bdep2009_03004.pdf", "url": "https://authors.library.caltech.edu/records/71mc7-3ws76/files/epjconf_bdep2009_03004.pdf" }, "resource_type": "article", "pub_year": "2011", "author_list": "Serabyn, E. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/e2q4n-2qf52", "eprint_id": 57925, "eprint_status": "archive", "datestamp": "2023-08-19 07:30:32", "lastmod": "2024-01-13 16:21:03", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } }, { "id": "Stam-D", "name": { "family": "Stam", "given": "D." } }, { "id": "Cavarroc-C", "name": { "family": "Cavarroc", "given": "C." } }, { "id": "Hough-J", "name": { "family": "Hough", "given": "J." } }, { "id": "Doel-J", "name": { "family": "Doel", "given": "J." } }, { "id": "Pinfield-D-J", "name": { "family": "Pinfield", "given": "D. J." } }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "C.-U." } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Udry-S", "name": { "family": "Udry", "given": "S." } }, { "id": "Ferrari-A", "name": { "family": "Ferrari", "given": "A." } }, { "id": "Martin-E", "name": { "family": "Martin", "given": "E." } }, { "id": "M\u00e9nard-F", "name": { "family": "M\u00e9nard", "given": "F." } }, { "id": "Sein-E", "name": { "family": "Sein", "given": "E." } } ] }, "title": "Spectral and polarimetric characterization of gazeous and telluric planets with SEE COAST", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2011 Owned by the authors, published by EDP Sciences.\n\nPublished - epjconf_bdep2009_07002.pdf
", "abstract": "SEE COAST stands for Super Earth Explorer \u2013 Coronagraphic Off-Axis Space Telescope. The concept was initially proposed to ESA for Cosmic Vision. None of the direct detection exoplanet proposals were selected in 2007 and we are now pursuing our efforts to consolidate the astrophysical program and the technical developments for the next call for proposal. The prime objective of SEE COAST is to contribute to the understanding of the formation and evolution of planetary systems. Exploring the diversity of these objects is therefore the main driver to define the instrumentation. In the next decade the improvement of radial velocity instruments and obviously temporal coverage will provide us with a large numbers of long period giants as well as telluric planets, namely Super Earths. Obtaining the spectral and polarimetric signatures of these objects in the visible range to measure atmospheric parameters (molecular composition, clouds, soils, \u2026) will be unique and with important scientific returns. A space mission complementary to near IR instruments like SPHERE, GPI, JWST and later ELTs for the full characterization of giants and Super Earths is a first secure step towards the longer term goal that is the characterization of telluric planets with mass and atmosphere comparable to that of the Earth. An overview of the astrophysical motivation and the trade-off that lead to a simple integrated concept of a space-based high contrast imaging instrument are given here.", "date": "2011-07-18", "date_type": "published", "publication": "EPJ Web of Conferences", "volume": "16", "publisher": "EDP Sciences", "pagerange": "Art. No. 07002", "id_number": "CaltechAUTHORS:20150601-150857119", "issn": "2101-6275", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150601-150857119", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1051/epjconf/20111607002", "primary_object": { "basename": "epjconf_bdep2009_07002.pdf", "url": "https://authors.library.caltech.edu/records/e2q4n-2qf52/files/epjconf_bdep2009_07002.pdf" }, "resource_type": "article", "pub_year": "2011", "author_list": "Boccaletti, A.; Baudoz, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/e1c7d-twj72", "eprint_id": 57709, "eprint_status": "archive", "datestamp": "2023-08-19 06:13:55", "lastmod": "2023-10-23 17:39:42", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Wallace-J-K", "name": { "family": "Wallace", "given": "J. Kent" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" } ] }, "title": "Improved high-contrast imaging with on-axis telescopes using a multistage vortex coronagraph", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2011 Optical Society of America.\n\nReceived December 16, 2010; revised March 3, 2011; accepted March 3, 2011;\nposted March 22, 2011 (Doc. ID 139775); published April 15, 2011.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. L. Pueyo acknowledge support from the Carl Sagan Fellowship Program.\n\nPublished - ol-36-8-1506.pdf
Submitted - 1103.1909v1.pdf
", "abstract": "The vortex coronagraph is one of the most promising coronagraphs for high-contrast imaging because of its simplicity, small inner working angle, high throughput, and clear off-axis discovery space. However, as with most coronagraphs, centrally obscured on-axis telescopes degrade contrast. Based on the remarkable ability of vortex coronagraphs to move light between the interior and exterior of pupils, we propose a method based on multiple vortices, that without sacrificing throughput, reduces the residual light leakage to (a/A)^n, with n\u22654, and a and A being the radii of the central obscuration and primary mirror, respectively. This method thus enables high contrasts to be reached even with an on-axis telescope.", "date": "2011-04-15", "date_type": "published", "publication": "Optics Letters", "volume": "36", "number": "8", "publisher": "Optical Society of America", "pagerange": "1506-1508", "id_number": "CaltechAUTHORS:20150520-111504686", "issn": "0146-9592", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-111504686", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Sagan Fellowship" } ] }, "doi": "10.1364/OL.36.001506", "primary_object": { "basename": "1103.1909v1.pdf", "url": "https://authors.library.caltech.edu/records/e1c7d-twj72/files/1103.1909v1.pdf" }, "related_objects": [ { "basename": "ol-36-8-1506.pdf", "url": "https://authors.library.caltech.edu/records/e1c7d-twj72/files/ol-36-8-1506.pdf" } ], "resource_type": "article", "pub_year": "2011", "author_list": "Mawet, Dimitri; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/66xyq-5qn19", "eprint_id": 57714, "eprint_status": "archive", "datestamp": "2023-08-19 05:50:55", "lastmod": "2023-10-23 17:39:58", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Mart\u00edn-S", "name": { "family": "Mart\u00edn", "given": "S." }, "orcid": "0000-0001-9281-2919" }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "F." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "Improving Interferometric Null Depth Measurements using Statistical Distributions: Theory and First Results with the Palomar Fiber Nuller", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: high angular resolution \u2013 instrumentation: interferometers \u2013 methods: data analysis \u2013\nmethods: statistical", "note": "\u00a9 2011 The American Astronomical Society.\n\nReceived 2010 July 6; accepted 2011 January 9; published 2011 February 15.\n\nThis work was carried out at the Jet propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The data presented in this paper are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. We wish to thank the Palomar Observatory staff for their assistance in mounting the PFN and conducting the observations at the Hale telescope. The research was supported by the Fond National de la Recherche scientifique de Belgique (FNRS), by the Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA), and by the Communaut\u00e9 Francaise de Belgique-Action de recherche concert\u00e9e-Acad\u00e9mie Wallonie-Europe and by the Center for Exoplanet Science. The authors thank the referee for a careful review and for giving us relevant comments that helped to significantly improve the paper.\n\nPublished - apj_729_2_110.pdf
Submitted - 1103.4719v1.pdf
", "abstract": "A new \"self-calibrated\" statistical analysis method has been developed for the reduction of nulling interferometry data. The idea is to use the statistical distributions of the fluctuating null depth and beam intensities to retrieve the astrophysical null depth (or equivalently the object's visibility) in the presence of fast atmospheric fluctuations. The approach yields an accuracy much better (about an order of magnitude) than is presently possible with standard data reduction methods, because the astrophysical null depth accuracy is no longer limited by the magnitude of the instrumental phase and intensity errors but by uncertainties on their probability distributions. This approach was tested on the sky with the two-aperture fiber nulling instrument mounted on the Palomar Hale telescope. Using our new data analysis approach alone\u2014and no observations of calibrators\u2014we find that error bars on the astrophysical null depth as low as a few 10^(\u22124) can be obtained in the near-infrared, which means that null depths lower than 10^(\u22123) can be reliably measured. This statistical analysis is not specific to our instrument and may be applicable to other interferometers.", "date": "2011-03-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "729", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 110", "id_number": "CaltechAUTHORS:20150520-131039919", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-131039919", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" }, { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'Industrie et l'Agriculture (FRIA)" }, { "agency": "Communaut\u00e9 Francaise de Belgique-Action de recherche concert\u00e9e-Acad\u00e9mie Wallonie-Europe" }, { "agency": "Center for Exoplanet Science" } ] }, "doi": "10.1088/0004-637X/729/2/110", "primary_object": { "basename": "apj_729_2_110.pdf", "url": "https://authors.library.caltech.edu/records/66xyq-5qn19/files/apj_729_2_110.pdf" }, "related_objects": [ { "basename": "1103.4719v1.pdf", "url": "https://authors.library.caltech.edu/records/66xyq-5qn19/files/1103.4719v1.pdf" } ], "resource_type": "article", "pub_year": "2011", "author_list": "Hanot, C.; Mennesson, B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mcbb7-ry711", "eprint_id": 57730, "eprint_status": "archive", "datestamp": "2023-08-19 05:01:06", "lastmod": "2024-01-13 16:19:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } } ] }, "title": "Imaging faint companions very close to stars", "ispublished": "unpub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics, planetary systems, binaries (including multiple): close", "note": "\u00a9 2010 International Astronomical Union.\n\nPublished - 2011IAUS__276__551S.pdf
", "abstract": "A vortex coronagraph on our extreme adaptive optics \"well-corrected subaperture\" on the Hale telescope has recently allowed the imaging of the triple-planet HR8799 system with\na 1.5 m subaperture. Moreover, a faint, low-mass companion to a second star was imaged only one diffraction beam width away from the primary. These results illustrate the potential of the vortex coronagraph, which can enable exoplanet imaging and characterization with smaller\ntelescopes than previously thought.", "date": "2011", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "Cambridge, MA", "pagerange": "551-552", "id_number": "CaltechAUTHORS:20150521-081510782", "isbn": "978-0-521-19652-9", "book_title": "The Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-081510782", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Sozzetti-A", "name": { "family": "Sozzetti", "given": "A." } }, { "id": "Lattanzi-M-G", "name": { "family": "Lattanzi", "given": "M. G." } }, { "id": "Boss-A-P", "name": { "family": "Boss", "given": "A. P." } } ] }, "doi": "10.1017/S1743921311021181", "primary_object": { "basename": "2011IAUS__276__551S.pdf", "url": "https://authors.library.caltech.edu/records/mcbb7-ry711/files/2011IAUS__276__551S.pdf" }, "resource_type": "book_section", "pub_year": "2011", "author_list": "Serabyn, Eugene; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/qc2zp-v5404", "eprint_id": 57861, "eprint_status": "archive", "datestamp": "2023-08-19 04:11:46", "lastmod": "2023-10-23 17:49:57", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "Christian" } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "First manufactured diamond AGPM vector vortex for the L- and N-bands: metrology and expected performances", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010. University of Li\u00e8ge.\n\nPresentation - Lyot2010proc_s8_talk_DelacroixC.pdf
", "abstract": "n/a", "date": "2010-10-28", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-131358906", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-131358906", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "Lyot2010proc_s8_talk_DelacroixC.pdf", "url": "https://authors.library.caltech.edu/records/qc2zp-v5404/files/Lyot2010proc_s8_talk_DelacroixC.pdf" }, "resource_type": "conference_item", "pub_year": "2010", "author_list": "Delacroix, Christian; Forsberg, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/eb2vf-3pw35", "eprint_id": 57860, "eprint_status": "archive", "datestamp": "2023-08-19 04:10:45", "lastmod": "2023-10-23 17:49:53", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" } ] }, "title": "Need an L-band coronagraph with a small Inner Working Angle on a 10-m class telescope", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010.\n\nPublished - Lyot2010proc_s8_poster_AbsilO.pdf
", "abstract": "n/a", "date": "2010-10-25", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-124720403", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-124720403", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "Lyot2010proc_s8_poster_AbsilO.pdf", "url": "https://authors.library.caltech.edu/records/eb2vf-3pw35/files/Lyot2010proc_s8_poster_AbsilO.pdf" }, "resource_type": "conference_item", "pub_year": "2010", "author_list": "Absil, O.; Delacroix, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z0xck-jwr18", "eprint_id": 57862, "eprint_status": "archive", "datestamp": "2023-08-19 04:10:51", "lastmod": "2023-10-23 17:50:00", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "R." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "Using the vector vortex coronagraph in the ExAO regime at Palomar: lessons learned", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010.\n\nPublished - Lyot2010proc_s8_talk_MawetD.pdf
", "abstract": "n/a", "date": "2010-10-25", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-132550433", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-132550433", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "Lyot2010proc_s8_talk_MawetD.pdf", "url": "https://authors.library.caltech.edu/records/z0xck-jwr18/files/Lyot2010proc_s8_talk_MawetD.pdf" }, "resource_type": "conference_item", "pub_year": "2010", "author_list": "Mawet, D.; Burruss, R.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1pj5d-pkv91", "eprint_id": 57859, "eprint_status": "archive", "datestamp": "2023-08-19 03:59:45", "lastmod": "2023-10-23 17:49:50", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Enhancing the Vector Vector Vortex Coronagraph: Achromatic design and chromatic filtering Mitigation of susceptibility to aberrations and stellar size Immunization to central obscuration, segment gaps and spiders", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010.\n\nPublished - Lyot2010proc_s8_poster_MawetD_1.pdf
", "abstract": "n/a", "date": "2010-10", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-123043286", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-123043286", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "primary_object": { "basename": "Lyot2010proc_s8_poster_MawetD_1.pdf", "url": "https://authors.library.caltech.edu/records/1pj5d-pkv91/files/Lyot2010proc_s8_poster_MawetD_1.pdf" }, "resource_type": "conference_item", "pub_year": "2010", "author_list": "Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/6p1rg-fgc83", "eprint_id": 57827, "eprint_status": "archive", "datestamp": "2023-08-19 03:30:36", "lastmod": "2024-01-13 16:20:21", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Forsberg-P", "name": { "family": "Forsberg", "given": "P." } }, { "id": "Karlsson-M", "name": { "family": "Karlsson", "given": "M." }, "orcid": "0000-0002-2011-0851" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "J." } } ] }, "title": "Annular Groove Phase Mask coronagraph in diamond for mid-IR\n wavelengths: manufacturing assessment and performance analysis", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, annular groove phase mask, vector vortex, achromaticity, ZOGs, subwavelength gratings", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). August 10, 2010.\n\nWe gratefully acknowledge the help of Prof. Markku Kuittinen, Ismo Vartianen and Kari Leinonen (University of\nJoensuu, Finland) with lithography. C. Delacroix acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". The authors from the Li\u00e8ge University acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe.\n\nPublished - 396488.pdf
Submitted - 1412.0395.pdf
", "abstract": "Phase-mask coronagraphs are known to provide high contrast imaging capabilities while preserving a small inner working angle, which allows searching for exoplanets or circumstellar disks with smaller telescopes or at longer wavelengths. The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) is an optical vectorial vortex coronagraph (or vector vortex) induced by a rotationally symmetric subwavelength grating (i.e. with a period smaller than \u03bb/n, \u03bb being the observed wavelength and n the refractive index of the grating substrate). In this paper, we present our first midinfrared AGPM prototypes imprinted on a diamond substrate. We firstly give an extrapolation of the expected coronagraph performances in the N-band (~10 \u03bcm), and prospects for down-scaling the technology to the most wanted L-band (~3.5 \u03bcm). We then present the manufacturing and measurement results, using diamond-optimized microfabrication techniques such as nano-imprint lithography (NIL) and reactive ion etching (RIE). Finally, the subwavelength grating profile metrology combines surface metrology (scanning electron microscopy, atomic force microscopy, white light interferometry) with diffractometry on an optical polarimetric bench and cross correlation with theoretical simulations using rigorous coupled wave analysis (RCWA).", "date": "2010-08-10", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77314W", "id_number": "CaltechAUTHORS:20150526-150116703", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-150116703", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA)" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique - Actions de recherche concert\u00e9e - Acad\u00e9mie universitaire Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.858278", "primary_object": { "basename": "1412.0395.pdf", "url": "https://authors.library.caltech.edu/records/6p1rg-fgc83/files/1412.0395.pdf" }, "related_objects": [ { "basename": "396488.pdf", "url": "https://authors.library.caltech.edu/records/6p1rg-fgc83/files/396488.pdf" } ], "resource_type": "book_section", "pub_year": "2010", "author_list": "Delacroix, C.; Forsberg, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/d0612-ycj19", "eprint_id": 57801, "eprint_status": "archive", "datestamp": "2023-08-19 03:30:01", "lastmod": "2024-01-13 16:20:02", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "R." } } ] }, "title": "The Potential of Small Space Telescopes for Exoplanet Observations", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 SPIE.\n\nThe research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under\ncontract with NASA.\n\nPublished - 396489.pdf
", "abstract": "The imaging of faint exoplanets near bright stars requires the development of very high contrast detection techniques, including both precise wavefront control and deep starlight rejection. A system-level proof-of-principle experiment carried out at at the Palomar Observatory has recently demonstrated that exoplanets can be detected very near stars even with a fairly small (1.5 m diameter) telescope aperture, such as someday might be used by a first space-based exoplanet imaging mission. Using fine-scale wavefront correction across this small aperture, together with fine pointing and focus control, pre- and post-detection speckle reduction, and a vector vortex coronagraph, it has been possible to achieve extremely good starlight rejection within a small number of diffractions beams of the stellar position. This performance has recently allowed the imaging of the three HR8799 planets and the HD32297 disk, thus providing a first system-level validation of the steps needed to achieve high-contrast observations at very small angles. These results thus serve to highlight the potential of small space telescopes aiming at high-contrast exoplanet observations. Specifically, a small-angle coronagraph enables the use of smaller telescopes, thus potentially reducing mission cost significantly.", "date": "2010-08-09", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77312O", "id_number": "CaltechAUTHORS:20150526-094336246", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-094336246", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.869683", "primary_object": { "basename": "396489.pdf", "url": "https://authors.library.caltech.edu/records/d0612-ycj19/files/396489.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z3vkm-3pm36", "eprint_id": 57828, "eprint_status": "archive", "datestamp": "2023-08-19 03:29:33", "lastmod": "2024-01-13 16:20:23", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Henry-C", "name": { "family": "Henry", "given": "Curt" } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "Paul" } }, { "id": "Alexander-J", "name": { "family": "Alexander", "given": "James" } }, { "id": "Gappinger-R", "name": { "family": "Gappinger", "given": "Robert" } }, { "id": "Dawson-O", "name": { "family": "Dawson", "given": "Olivia" } }, { "id": "Mireles-V", "name": { "family": "Mireles", "given": "VIrgil" } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "ACCESS \u2013 A Concept Study for the Direct Imaging and Spectroscopy of Exoplanetary Systems", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphs, exoplanets, space astronomy, active optics", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). August 06, 2010. \n\nThe research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology,\nunder a contract with the National Aeronautics and Space Administration.\n\nPublished - 396490.pdf
", "abstract": "ACCESS is one of four medium-class mission concepts selected for study in 2008-9 by NASA's Astrophysics Strategic Mission Concepts Study program. ACCESS evaluates a space observatory designed for extreme high-contrast imaging and spectroscopy of exoplanetary systems. An actively-corrected coronagraph is used to suppress the glare of diffracted and scattered starlight to contrast levels required for exoplanet imaging. The ACCESS study considered the relative merits and readiness of four major coronagraph types, and modeled their performance with a NASA medium-class space telescope. The ACCESS study asks: What is the most capable medium-class coronagraphic mission that is possible with telescope, instrument, and spacecraft technologies available today? Using demonstrated high-TRL technologies, the ACCESS science program surveys the nearest 120+ AFGK stars for exoplanet systems, and surveys the majority of those for exozodiacal dust to the level of 1 zodi at 3 AU. Coronagraph technology developments in the coming year are expected to further enhance the science reach of the ACCESS mission concept.", "date": "2010-08-06", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773128", "id_number": "CaltechAUTHORS:20150526-152227788", "isbn": "978-0-81948-221-1", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-152227788", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "Clampin-M-C", "name": { "family": "Clampin", "given": "Mark C." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.858301", "primary_object": { "basename": "396490.pdf", "url": "https://authors.library.caltech.edu/records/z3vkm-3pm36/files/396490.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Trauger, John; Stapelfeldt, Karl; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zmt8f-ejt60", "eprint_id": 57809, "eprint_status": "archive", "datestamp": "2023-08-19 03:19:21", "lastmod": "2024-01-13 16:20:09", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Burruss-R-S", "name": { "family": "Burruss", "given": "Rick S." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Roberts-J-E", "name": { "family": "Roberts", "given": "Jennifer E." } }, { "id": "Hickey-J-P", "name": { "family": "Hickey", "given": "Jeffrey P." }, "orcid": "0000-0002-6944-3964" }, { "id": "Rykoski-K-M", "name": { "family": "Rykoski", "given": "Kevin" } }, { "id": "Bikkannavar-S", "name": { "family": "Bikkannavar", "given": "Siddarayappa" } }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "Justin R." }, "orcid": "0000-0003-0800-0593" } ] }, "title": "Demonstration of on sky contrast improvement using the Modified Gerchberg-Saxton algorithm at the Palomar Observatory", "ispublished": "unpub", "full_text_status": "public", "keywords": "phase retrieval, mgs, high contrast coronagraphy, wavefront sensing, adaptive optics, HR8799", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 28, 2010.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the\nNational Aeronautics and Space Administration, and is based on observations obtained at the Hale Telescope, Palomar\nObservatory, as part of a continuing collaboration between the California Institute of Technology, NASA/JPL, and\nCornell University. We thank the staff of the Palomar Observatory and the Palomar Adaptive Optics team for their\ncontinued support.\n\nReference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion\nLaboratory, California Institute of Technology.\n\nPublished - 396483.pdf
", "abstract": "We have successfully demonstrated significant improvements in the high contrast detection limit of the Well-Corrected Subaperture (WCS) using a number of steps aimed at reducing non-common path (NCP) wavefront errors, including the Autonomous Phase Retrieval Calibration (APRC) software package developed at the Jet Propulsion Laboratory (JPL) for the Palomar adaptive optics instrument (PALAO). APRC utilizes the Modified Gerchberg-Saxton (MGS) wavefront sensing algorithm, also developed at JPL. The WCS delivers such excellent correction of the atmosphere that NCP wavefront errors not sensed by PALAO but present at the coronagraphic image plane begin to factor heavily as a limit to contrast. The APRC program was implemented to reduce these NCP wavefront errors from 110 nm to 35 nm (rms) in the lab, and now these exceptional results have been extended to targets on the sky for the first time, leading to a significant suppression of speckle noise. Consequently we now report a contrast level of very nearly 1\u00d710^(-4) at separations of 2\u03bb/D before the data is post processed, and 1\u00d710^(-5) after post processing. We describe here the major components of our instrument, the work done to improve the NCP wavefront errors, and the ensuing excellent on sky results, including the detection of the three exoplanets orbiting the star HR8799.", "date": "2010-07-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77365X", "id_number": "CaltechAUTHORS:20150526-122147958", "isbn": "978-0-8194-8226-6", "book_title": "Adaptive Optics Systems II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-122147958", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Cornell University" } ] }, "contributors": { "items": [ { "id": "Ellerbroek-B-L", "name": { "family": "Ellenbroeck", "given": "Brent L." } }, { "id": "Hart-M", "name": { "family": "Hart", "given": "Michael" } }, { "id": "Hubin-N", "name": { "family": "Hubin", "given": "Norbert" } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter L." } } ] }, "doi": "10.1117/12.857544", "primary_object": { "basename": "396483.pdf", "url": "https://authors.library.caltech.edu/records/zmt8f-ejt60/files/396483.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Burruss, Rick S.; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ve4bt-9zm25", "eprint_id": 57818, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:39", "lastmod": "2024-01-13 16:20:15", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "Development of a CELestial Infrared Nuller Experiment\n (CELINE) for broadband nulling and new single-mode fiber\n testing", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, Nulling coronagraphy, single-mode fibers, Achromatic phase shifters, Exoplanets", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010. \n\nThe research was supported by the Fond National de la Recherche scientifique de Belgique (FNRS), by the Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA) and by the Communaut\u00e9 Francaise de Belgique - Action de recherche concert\u00e9e - Acad\u00e9mie Wallonie - Europe. The authors acknowledge Jacques Baudrand (LESIA) and ESA for generously lending us respectively achromatic halfwave plates and Fresnel rhombs.\n\nPublished - 396486.pdf
", "abstract": "The small angular distance (<100 mas) and the huge flux ratio (10^7) between an Earth-like exoplanet in the socalled habitable zone and its host star makes it very difficult to direct image such systems. Nulling interferometry consists of a very powerful technique that combines destructively the light from two or more collectors to dim the starlight and to reveal faint companions in its vicinity. We have developed a new nulling experiment based on the fiber nuller principle. This fully symmetric reflective nulling bench aims at testing broadband nulling in both H and K bands as well as characterizing photonic fibers for modal filtering. We present in this paper the design, the development as well as preliminary results of the experiment.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77342L", "id_number": "CaltechAUTHORS:20150526-133834577", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-133834577", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" }, { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA)" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Action de recherche concert\u00e9e \u2013 Acad\u00e9mie Wallonie-Europe" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.856843", "primary_object": { "basename": "396486.pdf", "url": "https://authors.library.caltech.edu/records/ve4bt-9zm25/files/396486.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Hanot, Charles; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/y7ccp-tc246", "eprint_id": 57812, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:34", "lastmod": "2024-01-13 16:20:13", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "Frank" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" } ] }, "title": "Development of a statistical reduction method for the\n Palomar Fiber Nuller", "ispublished": "unpub", "full_text_status": "public", "keywords": "Statistics, Nulling interferometry, Coronagraphy, stellar diameters", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010.\n\nThis work was carried out at the Jet propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The research was supported by the Fond National de la Recherche scientifique de Belgique (FNRS), by the Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA) and by the Communaut\u00e9 Francaise de Belgique - Action de recherche concert\u00e9e - Acad\u00e9mie Wallonie - Europe and by the Center for Exoplanet Science.\n\nPublished - 396485.pdf
", "abstract": "A unique statistical data analysis method has been developed for reducing nulling interferometry data. The idea is to make use of the statistical distributions of the fluctuating null depths and beam intensities to retrieve the astrophysical null depth in the presence of fluctuations. The approach yields an accuracy much better than is possible with standard data reduction methods, because the accuracy of the null depth is not limited by the sizes of the phase and intensity errors but by the uncertainties on their statistical distributions. The result is an improvement in the instrumental null depth measurement limit of roughly an order of magnitude. We show in this paper that broadband null depths of 10^(-4) can be measured in the lab with our infrared Fiber Nuller without achromatic phase shifters. On sky results are also dramatically improved, with measured contrasts up to a couple of 10^(-4) with our instrument mounted on the Hale telescope at the Palomar Observatory. This statistical analysis is not specific to our instrument and may be applicable to other interferometers.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77342S", "id_number": "CaltechAUTHORS:20150526-130111425", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-130111425", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" }, { "agency": "Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture de Belgique (FRIA)" }, { "agency": "Communaut\u00e9 Francaise de Belgique-Action de recherche concert\u00e9e-Acad\u00e9mie Wallonie-Europe" }, { "agency": "Center for Exoplanet Science" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.857014", "primary_object": { "basename": "396485.pdf", "url": "https://authors.library.caltech.edu/records/y7ccp-tc246/files/396485.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Hanot, Charles; Mennesson, Bertrand; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k4f9z-5ff24", "eprint_id": 57822, "eprint_status": "archive", "datestamp": "2023-08-19 03:16:45", "lastmod": "2024-01-13 16:20:17", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Martin-S", "name": { "family": "Martin", "given": "S." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "F." } }, { "id": "Colavita-M-M", "name": { "family": "Colavita", "given": "M. M." } }, { "id": "Ragland-S", "name": { "family": "Ragland", "given": "S." } } ] }, "title": "The Potential of Rotating-Baseline Nulling Interferometers Operating within Large Single-Telescope Apertures", "ispublished": "unpub", "full_text_status": "public", "keywords": "nulling interferometry", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 21, 2010.\n\nWe thank the staffs of the Palomar and Keck Observatories for assistance with instrumental setups and with the observations. The research described herein was carried out in large part at the Jet Propulsion Laboratory, California\nInstitute of Technology, under contract with NASA.\n\nPublished - 396487.pdf
", "abstract": "The use of a rotating-baseline nulling interferometer for exoplanet detection was proposed several decades ago, but the technique has not yet been fully demonstrated in practice. Here we consider the faint companion and exozodiacal disk detection capabilities of rotating-baseline nulling interferometers, such as are envisioned for space-based infrared nullers, but operating instead within the aperture of large single telescopes. In particular, a nulling interferometer on a large aperture corrected by a next-generation extreme adaptive optics system can provide deep interferometric contrasts, and also reach smaller angles (sub \u03bb/D) than classical coronagraphs. Such rotating nullers also provide validation for an eventual space-based rotating-baseline nulling interferometer. As practical examples, we describe ongoing experiments with rotating nullers at Palomar and Keck, and consider briefly the case of the Thirty Meter Telescope.", "date": "2010-07-21", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 77341E", "id_number": "CaltechAUTHORS:20150526-135350900", "isbn": "978-0-8194-8224-2", "book_title": "Optical and Infrared Interferometry II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-135350900", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } }, { "id": "Rajagopal-J-K", "name": { "family": "Rajagopal", "given": "Jayadev K." } } ] }, "doi": "10.1117/12.857753", "primary_object": { "basename": "396487.pdf", "url": "https://authors.library.caltech.edu/records/k4f9z-5ff24/files/396487.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, E.; Mennesson, B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g4gfn-ckb08", "eprint_id": 57802, "eprint_status": "archive", "datestamp": "2023-08-19 03:14:30", "lastmod": "2024-01-13 16:20:05", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } } ] }, "title": "The Vector Vortex Coronagraph: sensitivity to central\n obscuration, low-order aberrations, chromaticism,\n and polarization", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, adaptive optics, wave-front control, small and large space-based telescopes, large and extremely large ground-based telescopes.", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 19, 2010.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA).\n\nPublished - 396482.pdf
", "abstract": "The Vector Vortex Coronagraph is a phase-based coronagraph, one of the most efficient in terms of inner working angle, throughput, discovery space, contrast, and simplicity. Using liquid-crystal polymer technology, this new coronagraph has recently been the subject of lab demonstrations in the near-infrared, visible and was also used on sky at the Palomar observatory in the H and K bands (1.65 and 2.2 \u03bcm, respectively) to image the brown dwarf companion to HR 7672, and the three extra-solar planets around HR 8799. However, despite these recent successes, the Vector Vortex Coronagraph is, as are most coronagraphs, sensitive to the central obscuration and secondary support structures, low-order aberrations (tip-tilt, focus, etc), bandwidth (chromaticism), and polarization when image-plane wavefront sensing is performed. Here, we consider in detail these sensitivities as a function of the topological charge of the vortex and design features inherent to the manufacturing technology, and show that in practice all of them can be mitigated to meet specific needs.", "date": "2010-07-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773914", "id_number": "CaltechAUTHORS:20150526-095007327", "isbn": "978-0-81948-229-7", "book_title": "Modern Technologies in Space- and Ground-based Telescopes and Instrumentation", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-095007327", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Atad-Ettedgui-E", "name": { "family": "Atad-Ettedgui", "given": "Eli" } }, { "id": "Lemke-D", "name": { "family": "Lemke", "given": "Dietrich" } } ] }, "doi": "10.1117/12.858240", "primary_object": { "basename": "396482.pdf", "url": "https://authors.library.caltech.edu/records/g4gfn-ckb08/files/396482.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Mawet, Dimitri; Pueyo, Laurent; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/mm5xt-s8w26", "eprint_id": 57810, "eprint_status": "archive", "datestamp": "2023-08-19 03:10:37", "lastmod": "2024-01-13 16:20:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "F." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "High Contrast Stellar Observations within the Diffraction\n Limit at the Palomar Hale Telescope", "ispublished": "unpub", "full_text_status": "public", "keywords": "infrared: stars - instrumentation: coronagraphs, interferometers - stars: circumstellar matter -\nstars: individual (\u03b1 Boo, Vega, \u03c1 Per)", "note": "\u00a9 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2010.\n\nThis work was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. We wish to thank the Palomar Observatory staff for their assistance in mount ing the PFN and conducting the observations at the Hale telescope.\n\nPublished - 396484.pdf
", "abstract": "We report on high-accuracy, high-resolution (< 20mas) stellar measurements obtained in the near infrared (\u2243 2.2 microns) at the Palomar 200 inch telescope using two elliptical (3m x 1.5m) sub-apertures located 3.4m apart. Our interferometric coronagraph, known as the \"Palomar Fiber Nuller\" (PFN), is located downstream of the Palomar adaptive optics (AO) system and recombines the two separate beams into a common singlemode fiber. The AO system acts as a \"fringe tracker\", maintaining the optical path difference (OPD) between the beams around an adjustable value, which is set to the central dark interference fringe. AO correction ensures high efficiency and stable injection of the beams into the single-mode fiber. A chopper wheel and a fast photometer are used to record short (< 50ms per beam) interleaved sequences of background, individual beam and interferometric signals. In order to analyze these chopped null data sequences, we developed a new statistical method, baptized \"Null Self-Calibration\" (NSC), which provides astrophysical null measurements at the 0.001 level, with 1 \u03c3 uncertainties as low as 0.0003. Such accuracy translates into a dynamic range greater than 1000:1 within the diffraction limit, demonstrating that the approach effectively bridges the traditional gap between regular coronagraphs, limited in angular resolution, and long baseline visibility interferometers, whose dynamic range is restricted to \u2243 100:1. As our measurements are extremely sensitive to the brightness distribution very close to the optical axis, we were able to constrain the stellar diameters and amounts of circumstellar emission for a sample of very bright stars. With the improvement expected when the PALM-3000 extreme AO system comes on-line at Palomar, the same instrument now equipped with a state of the art low noise fast read-out near IR camera, will yield 10^(-4) to 10^(-3) contrast as close as 30 mas for stars with K magnitude brighter than 6. Such a system will provide a unique and ideal tool for the detection of young (<100 Myr) self-luminous planets and hot debris disks in the immediate vicinity (0.1 to a few AUs) of nearby (< 50pc) stars.", "date": "2010-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 773511", "id_number": "CaltechAUTHORS:20150526-123956248", "isbn": "978-0-81948-225-9", "book_title": "Ground-based and Airborne Instrumentation for Astronomy Ill", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-123956248", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "McLean-I-S", "name": { "family": "McLean", "given": "Ian S." } }, { "id": "Ramsay-S-K", "name": { "family": "Ramsay", "given": "Suzanne K." } }, { "id": "Takami-Hideki", "name": { "family": "Takami", "given": "Hideki" } } ] }, "doi": "10.1117/12.857633", "primary_object": { "basename": "396484.pdf", "url": "https://authors.library.caltech.edu/records/mm5xt-s8w26/files/396484.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Mennesson, B.; Hanot, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/zf8yc-ckq29", "eprint_id": 57715, "eprint_status": "archive", "datestamp": "2023-08-22 00:17:30", "lastmod": "2023-10-23 17:40:04", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Formation and evolution of planetary systems: the impact of high-angular resolution optical techniques", "ispublished": "pub", "full_text_status": "public", "keywords": "Planetary systems; Circumstellar matter; Techniques: high-angular resolution; Techniques: interferometric", "note": "\u00a9 2009 Springer-Verlag.\n\nReceived: 4 May 2009; Published online: 15 December 2009.\n\nWe are grateful to Prof. J. Surdej for encouraging us to write this article, and for giving us a deadline (to try) to meet. We also thank Drs. J.-C. Augereau, J. Krist, F. Malbet, E. Serabyn and K. Stapelfeldt for their constructive comments and suggestions on the manuscript. O. Absil acknowledges the support from a Marie Curie IEF Fellowship while at LAOG, of an FRS\u2013FNRS postdoctoral fellowship while at IAGL, and from the Communaut\u00e9 Fran\u00e7aise de Belgique (Actions de recherche concert\u00e9es\u2014Acad\u00e9mie Universitaire Wallonie, Europe). D. Mawet is supported by an appointment to the National Aeronautics and Space Administration (NASA) Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nSubmitted - 0912.3915v1.pdf
", "abstract": "The direct images of giant extrasolar planets recently obtained around several main sequence stars represent a major step in the study of planetary systems. These high-dynamic range images are among the most striking results obtained by the current generation of high-angular resolution instruments which will be superseded by a new generation of instruments in the coming years. It is, therefore, an appropriate time to review the contributions of high-angular resolution visible/infrared techniques to the rapidly growing field of extrasolar planetary science. During the last 20 years, the advent of the Hubble Space Telescope, of adaptive optics on 4- to 10-m class ground-based telescopes, and of long-baseline infrared stellar interferometry, has opened a new viewpoint on the formation and evolution of planetary systems. By spatially resolving the optically thick circumstellar discs of gas and dust where planets are forming, these instruments have considerably improved our models of early circumstellar environments and have thereby provided new constraints on planet formation theories. High-angular resolution techniques are also directly tracing the mechanisms governing the early evolution of planetary embryos and the dispersal of optically thick material around young stars. Finally, mature planetary systems are being studied with an unprecedented accuracy thanks to single-pupil imaging and interferometry, precisely locating dust populations and putting into light a whole new family of long-period giant extrasolar planets.", "date": "2010-07", "date_type": "published", "publication": "Astronomy and Astrophysics Review", "volume": "18", "number": "3", "publisher": "Springer Verlag", "pagerange": "317-382", "id_number": "CaltechAUTHORS:20150520-132353320", "issn": "0935-4956", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-132353320", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Marie Curie IEF Fellowship" }, { "agency": "FRS-FNRS" }, { "agency": "Communaute Francaise de Belgique" }, { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1007/s00159-009-0028-y", "primary_object": { "basename": "0912.3915v1.pdf", "url": "https://authors.library.caltech.edu/records/zf8yc-ckq29/files/0912.3915v1.pdf" }, "resource_type": "article", "pub_year": "2010", "author_list": "Absil, Olivier and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/0f59c-pvz58", "eprint_id": 57811, "eprint_status": "archive", "datestamp": "2023-08-21 23:53:35", "lastmod": "2023-10-23 17:46:31", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Delacroix-C", "name": { "family": "Delacroix", "given": "C." } }, { "id": "Coleman-P", "name": { "family": "Coleman", "given": "P." } }, { "id": "Dominik-M", "name": { "family": "Dominik", "given": "M." }, "orcid": "0000-0002-3202-0343" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Le-Coroller-H", "name": { "family": "Le Coroller", "given": "H." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Quintana-H", "name": { "family": "Quintana", "given": "H." } }, { "id": "Sadibekova-T", "name": { "family": "Sadibekova", "given": "T." } }, { "id": "Sluse-D", "name": { "family": "Sluse", "given": "D." }, "orcid": "0000-0001-6116-2095" } ] }, "title": "The Optimal Gravitational Lens Telescope", "ispublished": "pub", "full_text_status": "public", "keywords": "gravitational lensing: strong; methods: laboratory; quasars: general; techniques: high angular resolution", "note": "\u00a9 2010 The American Astronomical Society.\n\nReceived 2009 November 30; Accepted 2010 March 2; Published 2010 April 8.\n\nThe authors wish to dedicate the present work to the memory of Prof. Sjur Refsdal (1935\u20132009) who has been a pioneer in the field of gravitational lensing theory. Sjur Refsdal\nhas also been a very keen friend and collaborator. The authors from the Li\u00e8ge University acknowledge support from the Communaut\u00e9 fran\u00e7aise de Belgique\u2014Actions de recherche concert\u00e9es\u2014Acad\u00e9mie Universitaire Wallonie-Europe and thank the Faculty of Sciences (Li\u00e8ge University), in particular Prof. J.-M. Bouquegneau, for making a mass production of gravitational lens simulators possible. D.S. acknowledges the support of a Humboldt Fellowship and H.Q. acknowledges partial support from the Belgian F.R.S.-FNRS during his sabbatical stay in the Li\u00e8ge University and the FONDAP Centro de Astrofisica.\n\nPublished - aj_139_5_1935.pdf
Submitted - 1006.1067v1.pdf
", "abstract": "Given an observed gravitational lens mirage produced by a foreground deflector (cf. galaxy, quasar, cluster, ...), it is possible via numerical lens inversion to retrieve the real source image, taking full advantage of the magnifying power of the cosmic lens. This has been achieved in the past for several remarkable gravitational lens systems. Instead, we propose here to invert an observed multiply imaged source directly at the telescope using an ad hoc optical instrument which is described in the present paper. Compared to the previous method, this should allow one to detect fainter source features as well as to use such an optimal gravitational lens telescope to explore even fainter objects located behind and near the lens. Laboratory and numerical experiments illustrate this new approach.", "date": "2010-05", "date_type": "published", "publication": "Astronomical Journal", "volume": "139", "number": "5", "publisher": "Astronomical Journal", "pagerange": "1935-1941", "id_number": "CaltechAUTHORS:20150526-124009322", "issn": "0004-6256", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-124009322", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es \u2013 Acad\u00e9mie universitaire Wallonie-Europe" }, { "agency": "Alexander von Humboldt Foundation" }, { "agency": "Fonds de la Recherche Scientifique (FNRS)" }, { "agency": "FONDAP Centro de Astrofisica" } ] }, "doi": "10.1088/0004-6256/139/5/1935", "primary_object": { "basename": "1006.1067v1.pdf", "url": "https://authors.library.caltech.edu/records/0f59c-pvz58/files/1006.1067v1.pdf" }, "related_objects": [ { "basename": "aj_139_5_1935.pdf", "url": "https://authors.library.caltech.edu/records/0f59c-pvz58/files/aj_139_5_1935.pdf" } ], "resource_type": "article", "pub_year": "2010", "author_list": "Surdej, J.; Delacroix, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4pq71-pes22", "eprint_id": 57708, "eprint_status": "archive", "datestamp": "2023-08-19 02:15:27", "lastmod": "2023-10-23 17:39:36", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "R." } } ] }, "title": "An image of an exoplanet separated by two diffraction beamwidths from a star", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2010 Macmillan Publishers Limited.\n\nReceived 21 November 2009; accepted 26 February 2010.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration, and is based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between the California Institute of Technology, NASA/JPL, and Cornell University. We thank the staff of the Palomar Observatory and both the JPL and Caltech Palomar Adaptive Optics (PALAO) teams, as well as our colleagues at JDS Uniphase, where our vortex masks are manufactured.\n\nAuthor Contributions: All authors contributed equally to this work.\n\nSupplemental Material - nature09007-s1.pdf
", "abstract": "Three exoplanets around the star HR\u20098799 have recently been discovered by means of differential imaging with large telescopes. Bright scattered starlight limits high-contrast imaging to large angular offsets, currently of the order of ten diffraction beamwidths, 10\u03bb/D, of the star (where \u03bb is the wavelength and D is the aperture diameter). Imaging faint planets at smaller angles calls for reducing the starlight and associated photon and speckle noise before detection, while efficiently transmitting nearby planet light. To carry out initial demonstrations of reduced-angle high-contrast coronagraphy, we installed a vortex coronagraph capable of reaching small angles behind a small, well-corrected telescope subaperture that provides low levels of scattered starlight. Here we report the detection of all three HR\u20098799 planets with the resultant small-aperture (1.5\u2009m) system, for which only 2\u03bb/D separate the innermost planet from the star, with a final noise level within a factor of two of that given by photon statistics. Similar well-corrected small-angle coronagraphs should thus be able to detect exoplanets located even closer to their host stars with larger ground-based telescopes, and also allow a reduction in the size of potential space telescopes aimed at the imaging of very faint terrestrial planets.", "date": "2010-04-15", "date_type": "published", "publication": "Nature", "volume": "464", "number": "7291", "publisher": "Nature Publishing Group", "pagerange": "1018-1020", "id_number": "CaltechAUTHORS:20150520-110740462", "issn": "0028-0836", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-110740462", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "collection": "CaltechAUTHORS", "doi": "10.1038/nature09007", "primary_object": { "basename": "nature09007-s1.pdf", "url": "https://authors.library.caltech.edu/records/4pq71-pes22/files/nature09007-s1.pdf" }, "resource_type": "article", "pub_year": "2010", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/b9f2f-ngx65", "eprint_id": 57804, "eprint_status": "archive", "datestamp": "2023-08-21 23:16:05", "lastmod": "2023-10-23 17:46:09", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "R." } }, { "id": "Hickey-J", "name": { "family": "Hickey", "given": "J." } }, { "id": "Shemo-D", "name": { "family": "Shemo", "given": "D." } } ] }, "title": "The Vector Vortex Coronagraph: Laboratory Results and First Light at Palomar Observatory", "ispublished": "pub", "full_text_status": "public", "keywords": "brown dwarfs; instrumentation: adaptive optics; instrumentation: high angular resolution; techniques: high angular resolution", "note": "\u00a9 2010 The American Astronomical Society.\n\nReceived 2009 October 28; Accepted 2009 December 1; Published 2009 December 24.\n\nThis work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with NASA. D.M. is supported by an appointment to the NASA Postdoctoral Program at JPL, Caltech, administered by Oak Ridge Associated Universities through a contract with NASA. The data presented in this paper are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University.\n\nPublished - apj_709_1_53.pdf
Submitted - 0912.2287v1.pdf
", "abstract": "High-contrast coronagraphy will be needed to image and characterize faint extrasolar planetary systems. Coronagraphy is a rapidly evolving field, and many enhanced alternatives to the classical Lyot coronagraph have been proposed in the past 10 years. Here, we discuss the operation of the vector vortex coronagraph, which is one of the most efficient possible coronagraphs. We first present recent laboratory results and then first light observations at the Palomar observatory. Our near-infrared H-band (centered at ~1.65 \u03bcm) and K-band (centered at ~2.2 \u03bcm) vector vortex devices demonstrated excellent contrast results in the lab, down to ~10^(\u20136) at an angular separation of ~3\u03bb/d. On sky, we detected a brown dwarf companion 3000 times fainter than its host star (HR 7672) in the K_s band (centered at ~2.15 \u03bcm), at an angular separation of ~2.5\u03bb/d. Current and next-generation high-contrast instruments can directly benefit from the demonstrated capabilities of such a vector vortex: simplicity, small inner working angle, high optical throughput (>90%), and maximal off-axis discovery space.", "date": "2010-01-20", "date_type": "published", "publication": "Astrophysical Journal", "volume": "709", "number": "1", "publisher": "American Astronomical Society", "pagerange": "53-57", "id_number": "CaltechAUTHORS:20150526-100838490", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-100838490", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "doi": "10.1088/0004-637X/709/1/53", "primary_object": { "basename": "apj_709_1_53.pdf", "url": "https://authors.library.caltech.edu/records/b9f2f-ngx65/files/apj_709_1_53.pdf" }, "related_objects": [ { "basename": "0912.2287v1.pdf", "url": "https://authors.library.caltech.edu/records/b9f2f-ngx65/files/0912.2287v1.pdf" } ], "resource_type": "article", "pub_year": "2010", "author_list": "Mawet, D.; Serabyn, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/p1x7y-ent68", "eprint_id": 57702, "eprint_status": "archive", "datestamp": "2023-08-19 01:10:05", "lastmod": "2024-01-13 16:18:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "J." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "W. A." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "J." } }, { "id": "Moody-D-M", "name": { "family": "Moody", "given": "D." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "L." }, "orcid": "0000-0003-3818-408X" }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "S." } }, { "id": "Henry-Curt", "name": { "family": "Henry", "given": "C." } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "P." } }, { "id": "Gappinger-R-O", "name": { "family": "Gappinger", "given": "R." } }, { "id": "Brugarolas-P-B", "name": { "family": "Brugarolas", "given": "P." } }, { "id": "Alexander-J", "name": { "family": "Alexander", "given": "J." } }, { "id": "Mireless-V", "name": { "family": "Mireless", "given": "V." } }, { "id": "Dawson-O", "name": { "family": "Dawson", "given": "O." } } ] }, "title": "ACCESS: A Concept Study for the Direct Imaging and Spectroscopy of Exoplanetary Systems", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 Astronomical Society of the Pacific. \n\nThe research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - 2010ASPC__430__375T.pdf
", "abstract": "ACCESS is one of four medium-class mission concepts selected for study in 2008/9 by NASA's Astrophysics Strategic Mission Concepts Study program. In a nutshell, ACCESS evaluates a space telescope designed for extreme high-contrast imaging and spectroscopy of exoplanetary systems. An actively-corrected coronagraph is used to suppress the glare of diffracted and scattered starlight to the levels required for exoplanet imaging. The ACCESS study asks: What is the most capable medium-class coronagraphic mission that is possible with telescope, instrument, and spacecraft technologies available today?", "date": "2010", "date_type": "published", "publisher": "Astronomical Society of the Pacific", "place_of_pub": "San Francisco, CA", "pagerange": "375-382", "id_number": "CaltechAUTHORS:20150520-102639514", "isbn": "9781583817407", "book_title": "Pathways Towards Habitable Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-102639514", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "du-Foresto-V-C", "name": { "family": "du Foresto", "given": "Vincent Coud\u00e9" } }, { "id": "Gelino-D-M", "name": { "family": "Gelino", "given": "Dawn M." } }, { "id": "Ribas-I", "name": { "family": "Ribas", "given": "Ignasi" } } ] }, "primary_object": { "basename": "2010ASPC__430__375T.pdf", "url": "https://authors.library.caltech.edu/records/p1x7y-ent68/files/2010ASPC__430__375T.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Trauger, J.; Stapelfeldt, K.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/3v39q-wyk73", "eprint_id": 57894, "eprint_status": "archive", "datestamp": "2023-08-19 01:10:10", "lastmod": "2023-10-23 17:51:14", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Burruss-R", "name": { "family": "Burruss", "given": "Rick" } } ] }, "title": "Detecting exoplanets with high contrast coronagraphy", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2010 Caltech. \n\nThis work was carried out at the Jet Propulsion Laboratory, under contract with NASA. The data presented are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. We wish to thank the Palomar Observatory staff for assistance both with our instrumentation and with the observations. Copyright 2010 California Institute of Technology. Government sponsorship acknowledged.\n\nPublished - F-serabyn.pdf
", "abstract": "The first images of exoplanets are now in hand, but the imaging of even fainter planets near bright stars requires the development of very high contrast detection techniques. The two necessary aspects are precise wavefront control and efficient starlight rejection. These essential aspects were recently demonstrated at the Palomar Observatory on a 1.5 m diameter \"well-corrected subaperture\" on the Hale telescope. \"Extreme\" adaptive optics wavefront correction was achieved using fine-scale wavefront correction on the subaperture, combined with phase-retrieval to reduce non-common path errors such as faint speckles. Starlight rejection has been maximized with a novel vector vortex coronagraph, precise tip-tilt and focus control within the coronagraph, and the ``locally optimized combination of images\" speckle calibration algorithm. The Palomar system provides small-angle contrast sensitivities comparable to those of much larger telescopes, allowing the imaging of e.g., the three HR8799 planets and the HD32297 disk. These results provide a first validation of the steps needed to achieve high-contrast in on-sky observations, and illustrate the promise of future ground- and space-based high-contrast instruments.", "date": "2010", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150529-081445433", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-081445433", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL" } ] }, "collection": "CaltechAUTHORS", "contributors": { "items": [ { "id": "Zapatero-Osorio-M-R", "name": { "family": "Zapatero Osorio", "given": "M. R." } }, { "id": "Gorgas-J", "name": { "family": "Gorgas", "given": "J." } }, { "id": "Ma\u00edz-Apell\u00e1niz-J", "name": { "family": "Ma\u00edz Apell\u00e1niz", "given": "J." } }, { "id": "Pardo-J-R", "name": { "family": "Pardo", "given": "J. R." } }, { "id": "Gil-de-Paz-A", "name": { "family": "Gil de Paz", "given": "A." } } ] }, "primary_object": { "basename": "F-serabyn.pdf", "url": "https://authors.library.caltech.edu/records/3v39q-wyk73/files/F-serabyn.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Serabyn, Eugene; Mawet, Dimitri; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4r02f-8tp08", "eprint_id": 15860, "eprint_status": "archive", "datestamp": "2023-08-21 22:17:15", "lastmod": "2023-10-19 17:18:54", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "K." }, "orcid": "0000-0002-2805-7338" }, { "id": "Crepp-J-R", "name": { "family": "Crepp", "given": "J." }, "orcid": "0000-0003-0800-0593" } ] }, "title": "Imaging the Debris Disk of HD 32297 with a Phase-Mask Coronagraph at High Strehl Ratio", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter; infrared: stars; instrumentation: adaptive optics; planetary systems: protoplanetary disks; stars: individual (HD 32297)", "note": "\u00a9 2009. The American Astronomical Society. Received 2009 May 13; accepted 2009 July 27; published 2009 August 13.\nThis work was carried out at the Jet Propulsion Laboratory\n(JPL), California Institute of Technology (Caltech), under\ncontract with NASA. D.M. is supported by an appointment to\nthe NASA Postdoctoral Program at JPL, Caltech, administered\nby Oak Ridge Associated Universities through a contract with\nNASA. The data presented in this Letter are based on observations\nobtained at the Hale Telescope, Palomar Observatory, as\npart of a continuing collaboration between Caltech, NASA/JPL, and Cornell University.\n\nPublished - Mawet2009p5806Astrophys_J_Lett.pdf
", "abstract": "We present the first K_s -band image of the scattered light from HD 32297's debris disk. HD 32297 is an A5 star known to possess a nearly edge-on disk with a high fractional luminosity L_d /L_* \u2248 0.003 in the infrared. Our image was obtained using phase-mask coronagraphy on the 1.6 m well-corrected subaperture on the 5 m Palomar Hale telescope, and reaches an inner working angle of 400 mas. We confirm the previously reported disk asymmetry and central hole. The gray J \u2013 K_s disk color appears similar on the two sides of the disk, which would demand a minimum grain size of at least a few microns, larger than thermal arguments suggest. One possible explanation is a planetesimal clump in a resonant orbit with an outward migrating giant planet, located at larger radii than the warm dust emitting at longer wavelengths. Our observations also clearly demonstrate the benefits of operating in the extreme adaptive optics regime with a coronagraph able to reach a very small inner working angle.", "date": "2009-09-01", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "702", "number": "1", "publisher": "American Astronomical Society", "pagerange": "L47-L50", "id_number": "CaltechAUTHORS:20090915-141325366", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090915-141325366", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/0004-637X/702/1/L47", "primary_object": { "basename": "Mawet2009p5806Astrophys_J_Lett.pdf", "url": "https://authors.library.caltech.edu/records/4r02f-8tp08/files/Mawet2009p5806Astrophys_J_Lett.pdf" }, "resource_type": "article", "pub_year": "2009", "author_list": "Mawet, D.; Serabyn, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/yf511-g1z89", "eprint_id": 57829, "eprint_status": "archive", "datestamp": "2023-08-21 22:06:08", "lastmod": "2024-01-13 16:20:25", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Belikov-R", "name": { "family": "Belikov", "given": "Ruslan" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } }, { "id": "Guyon-O", "name": { "family": "Guyon", "given": "Olivier" }, "orcid": "0000-0002-1097-9908" }, { "id": "Vanderbei-R-J", "name": { "family": "Vanderbei", "given": "Robert J." } } ] }, "title": "End-to-end simulations of different coronagraphic techniques", "ispublished": "unpub", "full_text_status": "public", "keywords": "Simulations; Wavefronts; Apodization; Coronagraphy; Deformable mirrors; Exoplanets; Optical vortices; Planets", "note": "\u00a9 2009 Society of Photo-Optical Instrumentation Engineers (SPIE). August 19, 2009.\n\nThe research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of\nTechnology, under a contract with the National Aeronautics and Space Administration. Work was performed as part of\nthe ACCESS mission concept study and the Exoplanet Exploration Program at JPL.\n\nPublished - 396491.pdf
", "abstract": "The NASA exoplanet exploration program is dedicated to developing technologies for detecting and characterizing extrasolar planets. In support of that program we have evaluated three different coronagraphic techniques (bandlimited Lyot, optical vortex, and phase-induced pupil apodization) using optical propagation simulations. These utilized a complete hypothetical telescope+coronagraph system with phase and amplitude aberrations. Wavefront control using dual sequential deformable mirrors was performed. We discuss the different computational techniques necessary to accurately simulate each coronagraph.", "date": "2009-08-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 744016", "id_number": "CaltechAUTHORS:20150526-154118634", "isbn": "9780819477309", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-154118634", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.826487", "primary_object": { "basename": "396491.pdf", "url": "https://authors.library.caltech.edu/records/yf511-g1z89/files/396491.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Krist, John E.; Moody, Dwight C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/4zbzz-djx48", "eprint_id": 57724, "eprint_status": "archive", "datestamp": "2023-08-20 02:36:36", "lastmod": "2024-01-13 16:19:03", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri P." }, "orcid": "0000-0002-8895-4735" }, { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John T." } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight C." } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "Kurt M." } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John E." } }, { "id": "Shemo-D-M", "name": { "family": "Shemo", "given": "David M." } }, { "id": "O'Brien-N-A", "name": { "family": "O'Brien", "given": "Nada A." } } ] }, "title": "Vector vortex coronagraph: first results in the visible", "ispublished": "unpub", "full_text_status": "public", "keywords": "High contrast imaging, exoplanets, phase-mask coronagraphy, optical vortex, polarization manipulation,\nwavefront control", "note": "\u00a9 2009 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). D. M. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nPublished - 396492.pdf
", "abstract": "We report the status of JPL and JDSU ongoing technological developments and contrast results of the vector vortex coronagraph (VVC) made out of liquid crystal polymers (LCP). The first topological charge 4 VVC was tested on the high contrast imaging testbed (HCIT) around 800 nm, under vacuum and with active wavefront control (32x32 Xinetics deformable mirror). We measured the inner working angle or IWA (50% off-axis transmission) at ~ 1.8\u03bb/d. A one-sided dark hole ranging from 3\u03bb/d to 10\u03bb/d was created in polarized light, showing a mean contrast of ~ 2 \u00d7 10^(-7) over a 10% bandwidth. This contrast was maintained very close in (3 \u03bb/d) in a reduced 2% bandwidth. These tests begin to demonstrate the potential of the LCP technology in the most demanding application of a space-based telescope dedicated to extrasolar planet characterization. The main limitations were identified as coming from incoherent sources such as multiple reflections, and residual chromaticity. A second generation of improved masks tackling these issues is being manufactured and will be tested on the HCIT in the coming months.", "date": "2009-08-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 74400X", "id_number": "CaltechAUTHORS:20150520-151419415", "isbn": "9780819477309", "book_title": "Techniques and Instrumentation for Detection of Exoplanets IV", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-151419415", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "contributors": { "items": [ { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart B." } } ] }, "doi": "10.1117/12.826569", "primary_object": { "basename": "396492.pdf", "url": "https://authors.library.caltech.edu/records/4zbzz-djx48/files/396492.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Mawet, Dimitri P.; Trauger, John T.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gnzrx-k3z94", "eprint_id": 57649, "eprint_status": "archive", "datestamp": "2023-08-20 02:30:29", "lastmod": "2024-01-13 16:18:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } } ] }, "title": "High\u2010contrast Imaging with a Small, Well\u2010corrected Subaperture and a Phase\u2010mask Coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "High-contrast imaging, adaptive optics, coronagraphy, brown dwarf, debris disk", "note": "\u00a9 2009 American Institute of Physics. Published online 05 August 2009.\n\nThis works was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). D. M. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nPublished - 1.3215878.pdf
", "abstract": "We used the 1.6\u2010meter\u2010diameter off\u2010axis well\u2010corrected subaperture (WCS) on the Palomar Hale telescope with a small inner\u2010working angle (IWA) coronagraph to provide high\u2010contrast images of known brown dwarf companions (HD 130948, HD 49197, and HR 7672) and the first images of the scattered light from HD 32297 debris disk obtained in the Ks band. While providing new constraints for this system, our observations also demonstrate the advantage of this particular instrument configuration.", "date": "2009-08-05", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "Melville, NY", "pagerange": "321-324", "id_number": "CaltechAUTHORS:20150519-100326965", "isbn": "978-0-7354-0695-7", "book_title": "Exoplanets and Disks: Their Formation and Diversity", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-100326965", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "contributors": { "items": [ { "id": "Usuda-Tomonori", "name": { "family": "Usuda", "given": "T." } }, { "id": "Ishii-Mamoru", "name": { "family": "Ishii", "given": "M." } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "M." } } ] }, "doi": "10.1063/1.3215878", "primary_object": { "basename": "1.3215878.pdf", "url": "https://authors.library.caltech.edu/records/gnzrx-k3z94/files/1.3215878.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Mawet, D. and Serabyn, E." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/02192-9sr93", "eprint_id": 14353, "eprint_status": "archive", "datestamp": "2023-08-21 21:22:14", "lastmod": "2023-10-18 16:47:58", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Bloemhof-E", "name": { "family": "Bloemhof", "given": "E." } }, { "id": "Haguenauer-P", "name": { "family": "Haguenauer", "given": "P." } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "B." }, "orcid": "0000-0003-4205-4800" }, { "id": "Wallace-K", "name": { "family": "Wallace", "given": "K." } }, { "id": "Hickey-J", "name": { "family": "Hickey", "given": "J." } } ] }, "title": "Imaging faint brown dwarf companions close to bright stars with a small, well-corrected telescope aperture", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics; stars: low-mass, brown dwarfs", "note": "\u00a9 2009 The American Astronomical Society.\nReceived 2008 September 27; accepted 2009 January 27; published 2009 April 13.\nThis work was carried out at the Jet Propulsion Laboratory,\nCalifornia Institute of Technology, under contract with the National Aeronautics and Space Administration, and is based\nin part on observations obtained at the Hale Telescope, Palomar\nObservatory, as part of a continuing collaboration between the\nCalifornia Institute of Technology, NASA/JPL, and Cornell\nUniversity. We thank M. Troy and the JPLAO team, and the staff\nof the Palomar Observatory for their able and ready assistance.\nNote added in proof. In a recent paper, Metchev & Hillenbrand\n(2009) conclude that the faint source near HD171488 is not a\nbona fide companion.\n\nPublished - Serabyn2009p2252Astrophys_J.pdf
", "abstract": "We have used our 1.6 m diameter off-axis well-corrected subaperture (WCS) on the Palomar Hale telescope in concert with a small inner-working-angle phase-mask coronagraph to image the immediate environs of a small number of nearby stars. Test cases included three stars (HD 130948, HD 49197, and HR7672) with known brown dwarf companions at small separations, all of which were detected. We also present the initial detection of a new object close to the nearby young G0V star HD171488. Follow-up observations are needed to determine if this object is a bona fide companion, but its flux is consistent with the flux of a young brown dwarf or low-mass M star at the same distance as the primary. Interestingly, at small angles our WCS coronagraph demonstrates a limiting detectable contrast comparable to that of extant Lyot coronagraphs on much larger telescopes corrected with current-generation adaptive optics (AO) systems. This suggests that small apertures corrected to extreme AO (ExAO) levels can be used to carry out initial surveys for close brown dwarf and stellar companions, leaving follow-up observations for larger telescopes.", "date": "2009-05-01", "date_type": "published", "publication": "Astrophysical Journal", "volume": "696", "number": "1", "publisher": "American Astronomical Society", "pagerange": "40-46", "id_number": "CaltechAUTHORS:20090602-153032700", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090602-153032700", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "doi": "10.1088/0004-637X/696/1/40", "primary_object": { "basename": "Serabyn2009p2252Astrophys_J.pdf", "url": "https://authors.library.caltech.edu/records/02192-9sr93/files/Serabyn2009p2252Astrophys_J.pdf" }, "resource_type": "article", "pub_year": "2009", "author_list": "Serabyn, E.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/np9rf-fy622", "eprint_id": 15068, "eprint_status": "archive", "datestamp": "2023-08-20 01:15:34", "lastmod": "2023-10-18 20:29:29", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cockell-C-S", "name": { "family": "Cockell", "given": "C. S." } }, { "id": "L\u00e9ger-A", "name": { "family": "L\u00e9ger", "given": "A." } }, { "id": "Fridlund-M", "name": { "family": "Fridlund", "given": "M." } }, { "id": "Herbst-T-M", "name": { "family": "Herbst", "given": "T. M." } }, { "id": "Kaltenegger-L", "name": { "family": "Kaltenegger", "given": "L." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C." }, "orcid": "0000-0002-5627-5471" }, { "id": "Benz-W", "name": { "family": "Benz", "given": "W." } }, { "id": "Blanc-M", "name": { "family": "Blanc", "given": "M." } }, { "id": "Brack-A", "name": { "family": "Brack", "given": "A." } }, { "id": "Chelli-A", "name": { "family": "Chelli", "given": "A." } }, { "id": "Colangeli-L", "name": { "family": "Colangeli", "given": "L." } }, { "id": "Cottin-H", "name": { "family": "Cottin", "given": "H." } }, { "id": "Coud\u00e9-du-Foresto-F", "name": { "family": "Coud\u00e9 du Foresto", "given": "F." } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "W. C." } }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "D." }, "orcid": "0000-0003-3499-2506" }, { "id": "den-Herder-J-W", "name": { "family": "den Herder", "given": "J.-W." } }, { "id": "Eiroa-C", "name": { "family": "Eiroa", "given": "C." } }, { "id": "Greaves-J-S", "name": { "family": "Greaves", "given": "J." }, "orcid": "0000-0002-3133-413X" }, { "id": "Henning-Thomas", "name": { "family": "Henning", "given": "T." } }, { "id": "Johnston-K-J", "name": { "family": "Johnston", "given": "K. J." } }, { "id": "Jones-H", "name": { "family": "Jones", "given": "H." } }, { "id": "Labadie-L", "name": { "family": "Labadie", "given": "L." } }, { "id": "Lammer-H", "name": { "family": "Lammer", "given": "H." } }, { "id": "Launhardt-R", "name": { "family": "Launhardt", "given": "R." } }, { "id": "Lawson-P", "name": { "family": "Lawson", "given": "P." } }, { "id": "Lay-O-P", "name": { "family": "Lay", "given": "O. P." } }, { "id": "LeDuigou-J-M", "name": { "family": "LeDuigou", "given": "J.-M." } }, { "id": "Liseau-R", "name": { "family": "Liseau", "given": "R." } }, { "id": "Malbet-F", "name": { "family": "Malbet", "given": "F." } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "S. R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "D." } }, { "id": "Moutou-C", "name": { "family": "Moutou", "given": "C." } }, { "id": "Mugnier-L-M", "name": { "family": "Mugnier", "given": "L. M." } }, { "id": "Ollivier-M", "name": { "family": "Ollivier", "given": "M." } }, { "id": "Paresce-F", "name": { "family": "Paresce", "given": "F." } }, { "id": "Quirrenbach-A", "name": { "family": "Quirrenbach", "given": "A." } }, { "id": "Rabbia-Y-D", "name": { "family": "Rabbia", "given": "Y. D." } }, { "id": "Raven-J-A", "name": { "family": "Raven", "given": "J. A." } }, { "id": "R\u00f6ttgering-H-J-A", "name": { "family": "Rottgering", "given": "H. J. A." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Santos-N-C", "name": { "family": "Santos", "given": "N. C." } }, { "id": "Selsis-F", "name": { "family": "Selsis", "given": "F." }, "orcid": "0000-0001-9619-5356" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Shibai-H", "name": { "family": "Shibai", "given": "H." } }, { "id": "Tamura-Motohide", "name": { "family": "Tamura", "given": "M." }, "orcid": "0000-0002-6510-0681" }, { "id": "Thi\u00e9baut-E", "name": { "family": "Thi\u00e9baut", "given": "E." } }, { "id": "Westall-F", "name": { "family": "Westall", "given": "F." } }, { "id": "White-G-J", "name": { "family": "White", "given": "G. J." } } ] }, "title": "Darwin \u2014- a mission to detect and search for life on extrasolar planets", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2009 Mary Ann Liebert, Inc. \n\nPublished in Volume: 9 Issue 1: March 24, 2009. Online Ahead of Print: February 9, 2009.\n\nPublished - Cockell2009p1688Astrobiology.pdf
", "abstract": "The discovery of extrasolar planets is one of the greatest achievements of modern astronomy. The detection of planets that vary widely in mass demonstrates that extrasolar planets of low mass exist. In this paper, we describe a mission, called Darwin, whose primary goal is the search for, and characterization of, terrestrial extrasolar planets and the search for life. Accomplishing the mission objectives will require collaborative science across disciplines, including astrophysics, planetary sciences, chemistry, and microbiology. Darwin is designed to detect rocky planets similar to Earth and perform spectroscopic analysis at mid-infrared wavelengths (6\u201320 \u03bcm), where an advantageous contrast ratio between star and planet occurs. The baseline mission is projected to last 5 years and consists of approximately 200 individual target stars. Among these, 25\u201350 planetary systems can be studied spectroscopically, which will include the search for gases such as CO_2, H_2O, CH_4, and O_3. Many of the key technologies required for the construction of Darwin have already been demonstrated, and the remainder are estimated to be mature in the near future. Darwin is a mission that will ignite intense interest in both the research community and the wider public.", "date": "2009-03-24", "date_type": "published", "publication": "Astrobiology", "volume": "9", "number": "1", "publisher": "Mary Ann Liebert", "pagerange": "1-22", "id_number": "CaltechAUTHORS:20090817-134520824", "issn": "1557-8070", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090817-134520824", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1089/ast.2007.0227", "primary_object": { "basename": "Cockell2009p1688Astrobiology.pdf", "url": "https://authors.library.caltech.edu/records/np9rf-fy622/files/Cockell2009p1688Astrobiology.pdf" }, "resource_type": "article", "pub_year": "2009", "author_list": "Cockell, C. S.; L\u00e9ger, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/j445n-p2c94", "eprint_id": 15162, "eprint_status": "archive", "datestamp": "2023-08-21 20:55:37", "lastmod": "2023-10-18 21:02:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cockell-C-S", "name": { "family": "Cockell", "given": "Charles S." } }, { "id": "Herbst-T", "name": { "family": "Herbst", "given": "Tom" } }, { "id": "L\u00e9ger-A", "name": { "family": "L\u00e9ger", "given": "Alain" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "Charles" }, "orcid": "0000-0002-5627-5471" }, { "id": "Benz-W", "name": { "family": "Benz", "given": "Willy" } }, { "id": "Brack-A", "name": { "family": "Brack", "given": "Andre" } }, { "id": "Chazelas-B", "name": { "family": "Chazelas", "given": "Bruno" } }, { "id": "Chelli-A", "name": { "family": "Chelli", "given": "Alain" } }, { "id": "Cottin-H", "name": { "family": "Cottin", "given": "Herv\u00e9" } }, { "id": "Coud\u00e9-du-Foresto-V", "name": { "family": "Coud\u00e9-du-Foresto", "given": "Vincent" } }, { "id": "Danchi-W", "name": { "family": "Danchi", "given": "William" } }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "den-Herder-J-W", "name": { "family": "den-Herder", "given": "Jan-Willem" } }, { "id": "Eiroa-C", "name": { "family": "Eiroa", "given": "Carlos" } }, { "id": "Fridlund-M", "name": { "family": "Fridlund", "given": "Malcolm" } }, { "id": "Henning-T", "name": { "family": "Henning", "given": "Thomas" } }, { "id": "Johnston-K", "name": { "family": "Johnston", "given": "Kenneth" } }, { "id": "Kaltenegger-L", "name": { "family": "Kaltenegger", "given": "Lisa" } }, { "id": "Labadie-L", "name": { "family": "Labadie", "given": "Lucas" } }, { "id": "Lammer-H", "name": { "family": "Lammer", "given": "Helmut" } }, { "id": "Launhardt-R", "name": { "family": "Launhardt", "given": "Ralf" } }, { "id": "Lawson-P", "name": { "family": "Lawson", "given": "Peter" } }, { "id": "Lay-O-P", "name": { "family": "Lay", "given": "Oliver P." } }, { "id": "Liseau-R", "name": { "family": "Liseau", "given": "Ren\u00e9" } }, { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan R." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Mourard-D", "name": { "family": "Mourard", "given": "Denis" } }, { "id": "Moutou-C", "name": { "family": "Moutou", "given": "Claire" } }, { "id": "Mugnier-L", "name": { "family": "Mugnier", "given": "Laurent" } }, { "id": "Paresce-F", "name": { "family": "Paresce", "given": "Francesco" } }, { "id": "Quirrenbach-A", "name": { "family": "Quirrenbach", "given": "Andreas" } }, { "id": "Rabbia-Y", "name": { "family": "Rabbia", "given": "Yves" } }, { "id": "R\u00f6ttgering-H-J-A", "name": { "family": "Rottgering", "given": "Huub J. A." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "Daniel" } }, { "id": "Santos-N", "name": { "family": "Santos", "given": "Nuno" } }, { "id": "Selsis-F", "name": { "family": "Selsis", "given": "Franck" }, "orcid": "0000-0001-9619-5356" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Westall-F", "name": { "family": "Westall", "given": "Frances" } }, { "id": "White-G", "name": { "family": "White", "given": "Glenn" } }, { "id": "Ollivier-M", "name": { "family": "Ollivier", "given": "Marc" } }, { "id": "Bord\u00e9-P", "name": { "family": "Bord\u00e9", "given": "Pascale" } } ] }, "title": "Darwin -\u2014 an experimental astronomy mission to search for extrasolar planets", "ispublished": "pub", "full_text_status": "public", "keywords": "Interferometer; Nulling interferometry; Direct imaging of exoplanets; Exoplanets; Habitable zone", "note": "\u00a9 2009 Springer. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. \n\n26 October 2007 Accepted: 6 August 2008. Published online: 10 September 2008.\n\nPublished - Cockell2009p13610.1007s10686-008-9121-x.pdf
", "abstract": "As a response to ESA call for mission concepts for its Cosmic Vision 2015\u20132025 plan, we propose a mission called Darwin. Its primary goal is the study of terrestrial extrasolar planets and the search for life on them. In this paper, we describe different characteristics of the instrument.", "date": "2009-03", "date_type": "published", "publication": "Experimental Astronomy", "volume": "23", "number": "1", "publisher": "Springer", "pagerange": "435-461", "id_number": "CaltechAUTHORS:20090818-151542916", "issn": "0922-6435", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090818-151542916", "rights": "This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.", "doi": "10.1007/s10686-008-9121-x", "primary_object": { "basename": "Cockell2009p13610.1007s10686-008-9121-x.pdf", "url": "https://authors.library.caltech.edu/records/j445n-p2c94/files/Cockell2009p13610.1007s10686-008-9121-x.pdf" }, "resource_type": "article", "pub_year": "2009", "author_list": "Cockell, Charles S.; Herbst, Tom; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/nf4dt-mpz02", "eprint_id": 57865, "eprint_status": "archive", "datestamp": "2023-08-20 01:04:22", "lastmod": "2024-01-13 16:20:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Danchi-W", "name": { "family": "Danchi", "given": "William" } }, { "id": "Lawson-P", "name": { "family": "Lawson", "given": "Peter" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Infrared Imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009.\n\nPublished - Infrared_Imaging.pdf
", "abstract": "A mid\u2010infrared mission would enable the detection of biosignatures of Earth\u2010like exoplanets around more than 150 nearby stars. The mid\u2010infrared spectral region is attractive for characterizing exoplanets because contrast with the parent star brightness is more favorable than in the visible (10 million vs. 10 billion), and because mid\u2010infrared light probes deep into a planet's troposphere. Furthermore, the mid\u2010infrared offers access to several strong molecular features that are key signs of life, and also provides a measure of the effective temperature and size of a planet. Taken together, an infrared mission plus a visible one would provide a nearly full picture of a planet, including signs of life; with a measure of mass from an astrometric mission, we would have a virtually complete picture. A small infrared mission would have several telescopes that are rigidly connected, with a science return from the detection and characterization of super\u2010Earth sized to larger planets near the HZ, plus a direct measure of the exozodi brightness in the HZ. In a large infrared mission, with formation\u2010flying telescopes, planets from an Earth\u2010twin and upwards\nin mass could be detected and characterized, as well as the exozodi. If proceeded by an astrometric mission, the detection phase could be skipped and the mission devoted to characterization, as in the visible case; lacking an astrometric mission, an infrared one could proceed alone, as was discussed for a visible coronograph, and with similar caveats. The technology needed for a large formation\u2010flying mission is similar to that for a small connected\u2010element one (e.g., cryogenics and detectors), with the addition of formation-flying technology. The technology is now in hand to implement a probe\u2010scale mission; starlight suppression has even been demonstrated to meet the requirements of a flagship mission. However, additional development of formation\u2010flying technology is needed, particularly in\u2010space testing of sensors and guidance, navigation, and control algorithms.", "date": "2009-03", "date_type": "published", "publisher": "NASA/JPL", "id_number": "CaltechAUTHORS:20150527-133603569", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-133603569", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "W. A." } }, { "id": "Unwin-S-C", "name": { "family": "Unwin", "given": "S. C." } } ] }, "primary_object": { "basename": "Infrared_Imaging.pdf", "url": "https://authors.library.caltech.edu/records/nf4dt-mpz02/files/Infrared_Imaging.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Danchi, William; Lawson, Peter; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gh81c-2w004", "eprint_id": 57831, "eprint_status": "archive", "datestamp": "2023-08-21 20:57:50", "lastmod": "2023-10-23 17:47:28", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Beuzit-J-L", "name": { "family": "Beuzit", "given": "J.-L." } }, { "id": "Doyon-R", "name": { "family": "Doyon", "given": "R." } }, { "id": "Marley-M-S", "name": { "family": "Marley", "given": "M." }, "orcid": "0000-0002-5251-2943" }, { "id": "Stam-D", "name": { "family": "Stam", "given": "D." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "W." } }, { "id": "Trauger-J", "name": { "family": "Trauger", "given": "J." } }, { "id": "Aylward-A", "name": { "family": "Aylward", "given": "A." } }, { "id": "Cho-James-Y-K", "name": { "family": "Cho", "given": "J. Y.-K." } }, { "id": "Keller-C-U", "name": { "family": "Keller", "given": "C.-U." } }, { "id": "Udry-S", "name": { "family": "Udry", "given": "S." } } ] }, "title": "Super earth explorer: a coronagraphic off-axis space telescope", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Exoplanets; Coronagraphy", "note": "\u00a9 2008 Springer Science + Business Media B.V.\n\nReceived: 9 February 2008; Accepted: 21 October 2008; Published online: 29 November 2008.", "abstract": "The Super-Earth Explorer is an Off-Axis Space Telescope (SEE-COAST) designed for high contrast imaging. Its scientific objective is to make the physico-chemical characterization of exoplanets possibly down to 2 Earth radii. For that purpose it will analyze the spectral and polarimetric properties of the parent starlight reflected by the planets, in the wavelength range 400\u20131,250 nm.", "date": "2009-03", "date_type": "published", "publication": "Experimental Astronomy", "volume": "23", "number": "1", "publisher": "Springer", "pagerange": "357-377", "id_number": "CaltechAUTHORS:20150526-162342336", "issn": "0922-6435", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-162342336", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "corp_creators": { "items": [ "SEE-COAST Team" ] }, "doi": "10.1007/s10686-008-9129-2", "resource_type": "article", "pub_year": "2009", "author_list": "Schneider, J.; Boccaletti, A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/de1wx-c3x24", "eprint_id": 57718, "eprint_status": "archive", "datestamp": "2023-08-20 00:51:29", "lastmod": "2023-10-23 17:40:13", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "E." } }, { "id": "Liewer-K", "name": { "family": "Liewer", "given": "K." } }, { "id": "Hanot-Ch", "name": { "family": "Hanot", "given": "Ch." } }, { "id": "McEldowney-S", "name": { "family": "McEldowney", "given": "S." } }, { "id": "Shemo-D", "name": { "family": "Shemo", "given": "D." } }, { "id": "O'Brien-N", "name": { "family": "O'Brien", "given": "N." } } ] }, "title": "Optical Vectorial Vortex Coronagraphs using Liquid Crystal Polymers: theory, manufacturing and laboratory demonstration", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2008 Optical Society of America.\n\nReceived 10 Oct 2008; revised 25 Nov 2008; accepted 28 Nov 2008; published 30 Jan 2009.\n\nThis work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA). The first author was supported by an appointment to the NASA Postdoctoral Program at the JPL, Caltech, administered by Oak Ridge Associated Universities through a contract with NASA.\n\nPublished - oe-17-3-1902.pdf
Submitted - 0912.0311v1.pdf
", "abstract": "In this paper, after briefly reviewing the theory of vectorial vortices, we describe our technological approach to generating the necessary phase helix, and report results obtained with the first optical vectorial vortex coronagraph (OVVC) in the laboratory. To implement the geometrical phase ramp, we make use of Liquid Crystal Polymers (LCP), which we believe to be the most efficient technological path to quickly synthesize optical vectorial vortices of virtually any topological charge. With the first prototype device of topological charge 2, a maximum peak-to-peak attenuation of 1.4\u00d710^(-2) and a residual light level of 3\u00d710^(-5) at an angular separation of 3.5 \u03bb/d (at which point our current noise floor is reached) have been obtained at a wavelength of 1.55 \u03bcm. These results demonstrate the validity of using space-variant birefringence distributions to generate a new family of coronagraphs usable in natural unpolarized light, opening a path to high performance coronagraphs that are achromatic and have low-sensitivity to low-order wavefront aberrations.", "date": "2009-02-02", "date_type": "published", "publication": "Optics Express", "volume": "17", "number": "3", "publisher": "Optical Society of America", "pagerange": "1902-1918", "id_number": "CaltechAUTHORS:20150520-135426309", "issn": "1094-4087", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-135426309", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" }, { "agency": "NASA Postdoctoral Program" } ] }, "doi": "10.1364/OE.17.001902", "primary_object": { "basename": "0912.0311v1.pdf", "url": "https://authors.library.caltech.edu/records/de1wx-c3x24/files/0912.0311v1.pdf" }, "related_objects": [ { "basename": "oe-17-3-1902.pdf", "url": "https://authors.library.caltech.edu/records/de1wx-c3x24/files/oe-17-3-1902.pdf" } ], "resource_type": "article", "pub_year": "2009", "author_list": "Mawet, D.; Serabyn, E.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/72wgm-nmc98", "eprint_id": 57854, "eprint_status": "archive", "datestamp": "2023-08-20 00:49:29", "lastmod": "2024-01-13 16:20:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Levine-Marie", "name": { "family": "Levine", "given": "Marie" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Overview of Technologies for Direct Optical Imaging of Exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009. \n\nThe work described in this report was performed at the Jet Propulsion Laboratory, California Institute of\nTechnology, under a contract with the National Aeronautics and Space Administration.\n\nPublished - Levine_Visible_Planet_Imaging_TEC_EOS.pdf
", "abstract": "The execution of a mission as ambitious and challenging as finding indications of life on planets around other stars requires careful evaluation of potential technological approaches. Following the strong endorsement from the last decadal survey on Astronomy and Astrophysics for the New Millennium (2001), NASA pursued a vigorous TPF program with nearly $150M community investment over the last decade in science, technology and mission studies. After a 3-year head-to-head comparison of exoplanet missions using direct optical imaging and mid-infra red (mid-IR) interferometry, NASA endorsed a visible imaging coronagraphic concept as the first of its exoplanet characterization missions in 2004.", "date": "2009-02", "date_type": "published", "publisher": "NASA", "id_number": "CaltechAUTHORS:20150527-103313767", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-103313767", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "primary_object": { "basename": "Levine_Visible_Planet_Imaging_TEC_EOS.pdf", "url": "https://authors.library.caltech.edu/records/72wgm-nmc98/files/Levine_Visible_Planet_Imaging_TEC_EOS.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Levine, Marie and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/j9z7d-dra03", "eprint_id": 57867, "eprint_status": "archive", "datestamp": "2023-08-20 00:29:35", "lastmod": "2024-01-13 16:20:42", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lawson-P-R", "name": { "family": "Lawson", "given": "P. R." } }, { "id": "Akeson-R-L", "name": { "family": "Akeson", "given": "R. L." }, "orcid": "0000-0001-9674-1564" }, { "id": "Beichman-C-A", "name": { "family": "Beichman", "given": "C. A." }, "orcid": "0000-0002-5627-5471" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Technology for a Mid-IR Flagship Mission to Characterize Earth-like Exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2009 \n\nThis research was carried out through the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.\n\nPublished - Lawson_NullingFormationFlying_TEC_EOS.pdf
", "abstract": "The exploration of Earth-like exoplanets will be enabled at mid-infrared wavelengths through technology and engineering advances in nulling interferometry and precision formation\nflying. Nulling interferometry provides the dynamic range needed for the detection of biomarkers. Formation flying provides the angular resolution required in the mid-infrared to separately distinguish the spectra of planets in multi-planet systems. The flight performance\nrequirements for nulling have been met and must now be validated in a flight-like environment. Formation-flying algorithms have been demonstrated in the lab and must now be validated in space. Our proposed technology program is described.", "date": "2009", "date_type": "published", "publisher": "NASA", "id_number": "CaltechAUTHORS:20150527-135215843", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-135215843", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "local_group": { "items": [ { "id": "Infrared-Processing-and-Analysis-Center-(IPAC)" } ] }, "primary_object": { "basename": "Lawson_NullingFormationFlying_TEC_EOS.pdf", "url": "https://authors.library.caltech.edu/records/j9z7d-dra03/files/Lawson_NullingFormationFlying_TEC_EOS.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Lawson, P. R.; Akeson, R. L.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/ze3fr-s2805", "eprint_id": 57729, "eprint_status": "archive", "datestamp": "2023-08-19 23:51:57", "lastmod": "2023-10-23 17:42:27", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Galicher-R", "name": { "family": "Galicher", "given": "R." } } ] }, "title": "SEE COAST, a spectro-polarimetric imaging mission to characterize exoplanets", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2008 Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique.\n\nPublished - 2008sf2a.conf..0061B.pdf
", "abstract": "SEE COAST is a space mission concept submitted to Cosmic Vision in 2007. It is designed for the characterization of giant gazeous planets and possibly Super Earths both in spectroscopy and polarimetry at visible wavelengths (0.4-1.2\u03bcm). The SEE COAST concept relies on a series of high contrast imaging techniques like coronagraphy, wavefront control and differential imaging. The strategy of the mission is presented and the instrumental concept briefly introduced.", "date": "2008-11", "date_type": "published", "publisher": "Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique", "id_number": "CaltechAUTHORS:20150521-075201174", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-075201174", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Charbonnel-C", "name": { "family": "Charbonnel", "given": "C." } }, { "id": "Combes-F", "name": { "family": "Combes", "given": "F." } }, { "id": "Samadi-R", "name": { "family": "Samadi", "given": "R." } } ] }, "primary_object": { "basename": "2008sf2a.conf..0061B.pdf", "url": "https://authors.library.caltech.edu/records/ze3fr-s2805/files/2008sf2a.conf..0061B.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Boccaletti, A.; Schneider, J.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jjfxm-h1879", "eprint_id": 95553, "eprint_status": "archive", "datestamp": "2023-08-19 23:20:01", "lastmod": "2024-01-14 21:43:39", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Garcia-P-J-V", "name": { "family": "Garcia", "given": "Paulo J. V." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Science case for 1 mas spectro-imagining in the near-infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "optical interferometry, imaging, spectroscopy, circumstellar disks, debris disks, exoplanets, winds, jets, active galactic nuclei, microlensing", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nMEF, PJVG and SA were supported in part by the FCT through projects PTDC/CTE-AST/68915/2006 and PTDC/CTE-AST/65971/2006 from POCI, with funds from the European programme FEDER. MEF is supported by the FCT through the research grant SFRH/BPD/36141/2007. BA was partly supported by FWF project P19503. This work was partially supported by the EU FP6 under contract number RII3-Ct-2004-001566 (OPTICON), by an ESO grant and by ISSI and DAAD/EGIDE grants. This manuscript used the SPIE LATEX template developed by Ken Hanson (LANL).\n\nPublished - 70134N.pdf
", "abstract": "We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.", "date": "2008-07-28", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134N", "id_number": "CaltechAUTHORS:20190517-080545412", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190517-080545412", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/68915/2006" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/65971/2006" }, { "agency": "Fondo Europeo de Desarrollo Regional (FEDER)" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "SFRH/BPD/36141/2007" }, { "agency": "FWF Der Wissenschaftsfonds", "grant_number": "P19503" }, { "agency": "European Union", "grant_number": "RII3-Ct-2004-001566" }, { "agency": "European Southern Observatory (ESO)" }, { "agency": "ISSI" }, { "agency": "Deutscher Akademischer Austauschdienst (DAAD)" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789216", "primary_object": { "basename": "70134N.pdf", "url": "https://authors.library.caltech.edu/records/jjfxm-h1879/files/70134N.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Garcia, Paulo J. V. and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1fwep-nd823", "eprint_id": 57845, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:56", "lastmod": "2024-01-13 16:20:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Trauger-J-T", "name": { "family": "Trauger", "given": "John" } }, { "id": "Stapelfeldt-K-R", "name": { "family": "Stapelfeldt", "given": "Karl" }, "orcid": "0000-0002-2805-7338" }, { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley" } }, { "id": "Henry-C", "name": { "family": "Henry", "given": "Curt" } }, { "id": "Krist-J-E", "name": { "family": "Krist", "given": "John" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Moody-D-C", "name": { "family": "Moody", "given": "Dwight" } }, { "id": "Park-Peggy", "name": { "family": "Park", "given": "Peggy" } }, { "id": "Pueyo-L", "name": { "family": "Pueyo", "given": "Laurent" }, "orcid": "0000-0003-3818-408X" }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Shaklan-S-B", "name": { "family": "Shaklan", "given": "Stuart" } } ] }, "title": "ACCESS \u2013 a NASA mission concept study of an Actively-Corrected Coronagraph for Exoplanet System Studies", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphs, exoplanets, space astronomy, active optics", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nPublished - 396497.pdf
", "abstract": "ACCESS (Actively-Corrected Coronagraph for Exoplanet System Studies) develops the science and engineering case for an investigation of exosolar giant planets, super-earths, exo-earths, and dust/debris fields that would be accessible to a medium-scale NASA mission. The study begins with the observation that coronagraph architectures of all types (other than the external occulter) call for an exceptionally stable telescope and spacecraft, as well as active wavefront correction with one or more deformable mirrors (DMs). During the study, the Lyot, shaped pupil, PIAA, and a number of other coronagraph architectures will all be evaluated on a level playing field that considers science capability (including contrast at the inner working angle (IWA), throughput efficiency, and spectral bandwidth), engineering readiness (including maturity of technology, instrument complexity, and sensitivity to wavefront errors), and mission cost so that a preferred coronagraph architecture can be selected and developed for a medium-class mission.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 701029", "id_number": "CaltechAUTHORS:20150527-084545585", "isbn": "9780819472205", "book_title": "Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-084545585", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Oschmann-J-M-Jr", "name": { "family": "Oschmann", "given": "Jacobus M., Jr." } }, { "id": "de-Graauw-M-W-M", "name": { "family": "de Graauw", "given": "Mattheus W. M." } }, { "id": "MacEwen-H-A", "name": { "family": "MacEwen", "given": "Howard A." } } ] }, "doi": "10.1117/12.789119", "primary_object": { "basename": "396497.pdf", "url": "https://authors.library.caltech.edu/records/1fwep-nd823/files/396497.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Trauger, John; Stapelfeldt, Karl; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h6a4a-w7b08", "eprint_id": 57843, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:51", "lastmod": "2024-01-13 16:20:31", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Garcia-P-J-V", "name": { "family": "Garcia", "given": "Paulo J. V." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Science case for 1 mas spectra-imaging in the near-infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "optical interferometry, imaging, spectroscopy, circumstellar disks, debris disks, exoplanets, winds, jets, active galactic nuclei, microlensing.", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nMEF, PJVG and SA were supported in part by the FCT through projects PTDC/CTE-AST/68915/2006 and PTDC/CTE-ST/65971/2006 from POCI, with funds from the European programme FEDER. MEF is supported by the FCT through the research grant SFRH/BPD/36141/2007. BA was partly supported by FWF project P19503. This work was partially supported by the EU FP6 under contract number RII3-Ct-2004-001566 (OPTICON), by an ESQ grant and by ISSI and DAAD/EGIDE grants. This manuscript used the SPIE Tb.TEX template developed by Ken Hanson (LANL).\n\nPublished - 396495.pdf
", "abstract": "We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134N", "id_number": "CaltechAUTHORS:20150527-082739581", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-082739581", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-AST/68915/2006" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PTDC/CTE-ST/65971/2006" }, { "agency": "POCI European programme FEDER. MEF" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "SFRH/BPD/36141/2007" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "P19503" }, { "agency": "EU FP6", "grant_number": "RII3-Ct-2004-001566 (OPTICON)" }, { "agency": "ESQ" }, { "agency": "Deutsche Forschungsgemeinschaft (DFG)" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7\u0327oise" } } ] }, "doi": "10.1117/12.789216", "primary_object": { "basename": "396495.pdf", "url": "https://authors.library.caltech.edu/records/h6a4a-w7b08/files/396495.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Garcia, Paulo J. V. and Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sky16-49w66", "eprint_id": 57841, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:46", "lastmod": "2024-01-13 16:20:29", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Gabor-Pavel", "name": { "family": "Gabor", "given": "Pavel" } }, { "id": "Schuller-Peter-A", "name": { "family": "Schuller", "given": "Peter A." } }, { "id": "Chazelas-Bruno", "name": { "family": "Chazelas", "given": "Bruno" } }, { "id": "Decaudin-Michel", "name": { "family": "Decaudin", "given": "Michel" } }, { "id": "Lab\u00e8que-Alain", "name": { "family": "Lab\u00e8que", "given": "Alain" } }, { "id": "Duret-Philippe", "name": { "family": "Duret", "given": "Philippe" } }, { "id": "Rabbia-Yves", "name": { "family": "Rabbia", "given": "Yves" } }, { "id": "Launhardt-Ralf", "name": { "family": "Launhardt", "given": "Ralf" } }, { "id": "Gay-Jean", "name": { "family": "Gay", "given": "Jean" } }, { "id": "Sodnik-Zoran", "name": { "family": "Sodnik", "given": "Zoran" } }, { "id": "Barillot-Marc", "name": { "family": "Barillot", "given": "Marc" } }, { "id": "Brachet-Frank", "name": { "family": "Brachet", "given": "Frank" } }, { "id": "Laurent-Thomas", "name": { "family": "Laurent", "given": "Thomas" } }, { "id": "Jacquinod-Sophie", "name": { "family": "Jacquinod", "given": "Sophie" } }, { "id": "Vandormael-Denis", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J\u00e9r\u00f4me", "name": { "family": "Loicq", "given": "J\u00e9r\u00f4me" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ollivier-Marc", "name": { "family": "Ollivier", "given": "Marc" } }, { "id": "L\u00e9ger-Alain", "name": { "family": "L\u00e9ger", "given": "Alain" } } ] }, "title": "Tests of achromatic phase shifters performed on the SYNAPSE test bench: a progress report", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, exoplanets, infrared spectroscopy, Darwin/TPF-I, achromatic phase shifters", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008.\n\nThis work was supported by Centre National d'Etudes Spatiales (action R&T, n. R-506/SU-002-022) and Agence N ationale de la Recherche (theme blanc, n. 5A 0617).\n\nPublished - 396494.pdf
Submitted - 0812.1901v1.pdf
", "abstract": "The achromatic phase shifter (APS) is a component of the Bracewell nulling interferometer studied in preparation for future space missions (viz. Darwin/TPF-I) focusing on spectroscopic study of Earth-like exo-planets. Several possible designs of such an optical subsystem exist. Four approaches were selected for further study. Thales Alenia Space developed a dielectric prism APS. A focus crossing APS prototype was developed by the OCA, Nice, France. A field reversal APS prototype was prepared by the MPIA in Heidelberg, Germany. Centre Spatial de Liege develops a concept based on Fresnel's rhombs. This paper presents a progress report on the current work aiming at evaluating these prototypes on the Synapse test bench at the Institut d'Astrophysique Spatiale in Orsay, France.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70134O", "id_number": "CaltechAUTHORS:20150527-071644124", "isbn": "9780819472236", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-071644124", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)", "grant_number": "R-506/SU-002-022" }, { "agency": "Agence Nationale pour la Recherche (ANR)", "grant_number": "5A 0617" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-Markus", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-William-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-Fran\u00e7oise", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789269", "primary_object": { "basename": "0812.1901v1.pdf", "url": "https://authors.library.caltech.edu/records/sky16-49w66/files/0812.1901v1.pdf" }, "related_objects": [ { "basename": "396494.pdf", "url": "https://authors.library.caltech.edu/records/sky16-49w66/files/396494.pdf" } ], "resource_type": "book_section", "pub_year": "2008", "author_list": "Gabor, Pavel; Schuller, Peter A.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k18x2-ghs35", "eprint_id": 57805, "eprint_status": "archive", "datestamp": "2023-08-19 23:13:40", "lastmod": "2024-01-13 16:20:07", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Martin-S-R", "name": { "family": "Martin", "given": "Stefan" } }, { "id": "Serabyn-E", "name": { "family": "Serabyn", "given": "Eugene" } }, { "id": "Liewer-K-M", "name": { "family": "Liewer", "given": "Kurt" } }, { "id": "Loya-F", "name": { "family": "Loya", "given": "Frank" } }, { "id": "Mennesson-B", "name": { "family": "Mennesson", "given": "Bertrand" }, "orcid": "0000-0003-4205-4800" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The development and applications of a ground-based fiber nulling coronagraph", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, nulling coronagraphy, exo-planets", "note": "\u00a9 2008 SPIE.\n\nThis work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the\nNational Aeronautics and Space Administration.\n\nPublished - 396496.pdf
", "abstract": "A rotating nulling coronagraph has been built for use on ground-based telescopes. The system is based on the concept of sub-aperturing the pupil of the telescope with two elliptical apertures and combining the resulting two input beams on a single-mode fiber. By a relative \u03c0 phase shift of the beams, the starlight can be nulled and a relatively faint companion star can be detected. Rotation of the aperture mask on the telescope pupil results in a signal similar to that expected from a space-borne telescope system such as the proposed TPF/Darwin interferometer. The design of the nulling coronagraph and the ancillary systems that are needed, such as the fringe tracker, are described and the potential for observations on telescopes such as the Palomar 200\" is discussed. Results of a nulling experiment using a single mode fiber as a beam combiner for broadband light between 1.50 \u03bcm and 1.80 \u03bcm are shown.", "date": "2008-07-14", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70131Y", "id_number": "CaltechAUTHORS:20150526-103248763", "isbn": "978-0-8194-7223-6", "book_title": "Optical and Infrared Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-103248763", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA/JPL/Caltech" } ] }, "contributors": { "items": [ { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } }, { "id": "Delplancke-F", "name": { "family": "Delplancke", "given": "Fran\u00e7oise" } } ] }, "doi": "10.1117/12.789484", "primary_object": { "basename": "396496.pdf", "url": "https://authors.library.caltech.edu/records/k18x2-ghs35/files/396496.pdf" }, "resource_type": "book_section", "pub_year": "2008", "author_list": "Martin, Stefan; Serabyn, Eugene; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hkj85-te731", "eprint_id": 57839, "eprint_status": "archive", "datestamp": "2023-08-19 23:07:47", "lastmod": "2024-01-13 16:20:27", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Abe-Lyu", "name": { "family": "Abe", "given": "Lyu" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Daban-J-B", "name": { "family": "Daban", "given": "Jean-Baptiste" } }, { "id": "Douet-R", "name": { "family": "Douet", "given": "Richard" } }, { "id": "Guerri-G", "name": { "family": "Guerri", "given": "Geraldine" } }, { "id": "Robbe-Dubois-S", "name": { "family": "Robbe-Dubois", "given": "Sylvie" } }, { "id": "Bendjoya-P", "name": { "family": "Bendjoya", "given": "Philippe" } }, { "id": "Dohlen-K", "name": { "family": "Dohlen", "given": "Kjetil" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Prototyping coronagraphs for exoplanet characterization\n with SPHERE", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, High Contrast Imaging, Exoplanets", "note": "\u00a9 2008 Society of Photo-Optical Instrumentation Engineers (SPIE).\n\nPublished - 396493.pdf
Submitted - 0807.0694.pdf
", "abstract": "The detection and characterization of extrasolar planets with SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) is challenging and in particular relies on the ability of a coronagraph to attenuate the diffracted starlight. SPHERE includes 3 instruments, 2 of which can be operated simultaneously in the near IR from 0.95 to 1.8 microns. This requirements is extremely critical for coronagraphy. This paper briefly introduces the concepts of 2 coronagraphs, the Half-Wave Plate Four Quadrant Phase Masks and the Apodized Pupil Lyot Coronagraph, prototyped within the SPHERE consortium by LESIA (Observatory of Paris) and FIZEAU (University of Nice) respectively. Then, we present the measurements of contrast and sensitivity analysis. The comparison with technical specifications allows to validate the technology for manufacturing these coronagraphs.", "date": "2008-07-07", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 70151B", "id_number": "CaltechAUTHORS:20150527-065433063", "isbn": "9780819472250", "book_title": "Adaptive Optics Systems", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-065433063", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Hubin-N", "name": { "family": "Hubin", "given": "Norbert" } }, { "id": "Max-C-E", "name": { "family": "Max", "given": "Claire E." } }, { "id": "Wizinowich-P-L", "name": { "family": "Wizinowich", "given": "Peter L." } } ] }, "doi": "10.1117/12.789341", "primary_object": { "basename": "396493.pdf", "url": "https://authors.library.caltech.edu/records/hkj85-te731/files/396493.pdf" }, "related_objects": [ { "basename": "0807.0694.pdf", "url": "https://authors.library.caltech.edu/records/hkj85-te731/files/0807.0694.pdf" } ], "resource_type": "book_section", "pub_year": "2008", "author_list": "Boccaletti, Anthony; Abe, Lyu; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/kf267-vaf60", "eprint_id": 57670, "eprint_status": "archive", "datestamp": "2023-08-22 10:27:45", "lastmod": "2023-10-23 17:37:26", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Selsis-F", "name": { "family": "Selsis", "given": "F." }, "orcid": "0000-0001-9619-5356" }, { "id": "Chazelas-B", "name": { "family": "Chazelas", "given": "B." } }, { "id": "Bord\u00e9-P", "name": { "family": "Bord\u00e9", "given": "P." } }, { "id": "Ollivier-M", "name": { "family": "Ollivier", "given": "M." } }, { "id": "Brachet-F", "name": { "family": "Brachet", "given": "F." } }, { "id": "Decaudin-M", "name": { "family": "Decaudin", "given": "M." } }, { "id": "Bouchy-F", "name": { "family": "Bouchy", "given": "F." } }, { "id": "Ehrenreich-D", "name": { "family": "Ehrenreich", "given": "D." }, "orcid": "0000-0001-9704-5405" }, { "id": "Grie\u00dfmeier-J-M", "name": { "family": "Grie\u00dfmeier", "given": "J.-M." } }, { "id": "Lammer-H", "name": { "family": "Lammer", "given": "H." } }, { "id": "Sotin-C", "name": { "family": "Sotin", "given": "C." } }, { "id": "Grasset-O", "name": { "family": "Grasset", "given": "O." } }, { "id": "Moutou-C", "name": { "family": "Moutou", "given": "C." } }, { "id": "Barge-P", "name": { "family": "Barge", "given": "P." } }, { "id": "Deleuil-M", "name": { "family": "Deleuil", "given": "M." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Despois-D", "name": { "family": "Despois", "given": "D." } }, { "id": "Kasting-J-F", "name": { "family": "Kasting", "given": "J. F." }, "orcid": "0000-0003-4042-2067" }, { "id": "L\u00e9ger-A", "name": { "family": "L\u00e9ger", "given": "A." } } ] }, "title": "Could we identify hot ocean-planets with CoRoT, Kepler and Doppler velocimetry?", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Extrasolar planets; Ices; Planets migration", "note": "\u00a9 2007 Elsevier Inc. Received 21 July 2006; revised 8 April 2007. Available online 1 May 2007.\n\nWe are grateful to Odile Dutuit, Roland Thissen, Alexandro Morbidelli, and David Koch for valuable discussions on the water molecule absorption in the EUV, the possible abundance of these putative planets and precise information on Kepler, respectively. We are also grateful to an anonymous referee and to Marc Kuchner for valuable comments on our initial manuscript. This work was supported by CNRS and CNES in part by the Programme National de Plan\u00e9tologie and the Groupe de Recherche \"Exobio,\" and under contract 1256791 with the Jet Propulsion Laboratory (JPL) funded by NASA through the Michelson Fellowship Program. We also acknowledge the benefit from the ISSI Team \"Evolution of Habitable Planets.\"", "abstract": "Planets less massive than about 10 MEarth are expected to have no massive H\u2013He atmosphere and a cometary composition (\u223c50% rocks, 50% water, by mass) provided they formed beyond the snowline of protoplanetary disks. Due to inward migration, such planets could be found at any distance between their formation site and the star. If migration stops within the habitable zone, this may produce a new kind of planets, called ocean-planets. Ocean-planets typically consist in a silicate core, surrounded by a thick ice mantle, itself covered by a 100 km-deep ocean. The possible existence of ocean-planets raises important astrobiological questions: Can life originate on such body, in the absence of continent and ocean\u2013silicate interfaces? What would be the nature of the atmosphere and the geochemical cycles? In this work, we address the fate of hot ocean-planets produced when migration ends at a closer distance. In this case the liquid/gas interface can disappear, and the hot H_2O envelope is made of a supercritical fluid. Although we do not expect these bodies to harbor life, their detection and identification as water-rich planets would give us insight as to the abundance of hot and, by extrapolation, cool ocean-planets. The water reservoir of these planets seems to be weakly affected by gravitational escape, provided that they are located beyond some minimum distance, e.g. 0.04 AU for a 5-Earth-mass planet around a Sun-like star. The swelling of their water atmospheres by the high stellar flux is expected not to significantly increase the planets' radii. We have studied the possibility of detecting and characterizing these hot ocean-planets by measuring their mean densities using transit missions in space\u2014CoRoT (CNES) and Kepler (NASA)\u2014in combination with Doppler velocimetry from the ground\u2014HARPS (ESO) and possible future instruments. We have determined the domain in the [stellar magnitude, orbital distance] plane where discrimination between ocean-planets and rocky planets is possible with these instruments. The brightest stars of the mission target lists and the planets closest to their stars are the most favorable cases. Full advantage of high precision photometry by CoRoT, and particularly Kepler, can be obtained only if a new generation of Doppler instruments is built.", "date": "2007-11-15", "date_type": "published", "publication": "Icarus", "volume": "191", "number": "2", "publisher": "Elsevier", "pagerange": "453-468", "id_number": "CaltechAUTHORS:20150519-143035564", "issn": "0019-1035", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-143035564", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "Centre National d'\u00c9tudes Spatiales (CNES)" }, { "agency": "Programme National de Plan\u00e9tologie (PNP)", "grant_number": "1256791" }, { "agency": "NASA Michelson Fellowship" } ] }, "doi": "10.1016/j.icarus.2007.04.010", "resource_type": "article", "pub_year": "2007", "author_list": "Selsis, F.; Chazelas, B.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/snxd7-r1125", "eprint_id": 57896, "eprint_status": "archive", "datestamp": "2023-08-19 21:04:36", "lastmod": "2023-10-23 17:51:20", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C\u00e9dric" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Defr\u00e8re-D", "name": { "family": "Defr\u00e8re", "given": "Denis" }, "orcid": "0000-0003-3499-2506" }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J\u00e9rome" } }, { "id": "Fleury-K", "name": { "family": "Fleury", "given": "Karl" } }, { "id": "Plesseria-J-Y", "name": { "family": "Plesseria", "given": "Jean-Yves" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "Fresnel rhombs as achromatic phase shifters for infrared nulling interferometry", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2007 Optical Society of America. Received 25 Jun 2007; revised 24 Aug 2007; accepted 25 Aug 2007; published 21 Sep 2007.\n\nThe authors acknowledge the financial support of ESA.\n\nPublished - oe-15-20-12850.pdf
", "abstract": "We propose a new family of achromatic phase shifters for infrared nulling interferometry. These key optical components can be seen as optimized Fresnel rhombs, using the total internal reflection phenomenon, modulated or not. The total internal reflection indeed comes with a phase shift between the polarization components of the incident light. We propose a solution to implement this vectorial phase shift between interferometer arms to provide the destructive interference process needed to disentangle highly contrasted objects from one another. We also show that, modulating the index transition at the total internal reflection interface allows compensating for the intrinsic material dispersion in order to make the subsequent phase shift achromatic over especially broad bands. The modulation can be induced by a thin film of a well-chosen material or a subwavelength grating whose structural parameters are thoroughly optimized. We present results from theoretical simulations together with preliminary fabrication outcomes and measurements for a prototype in Zinc Selenide.", "date": "2007-10-01", "date_type": "published", "publication": "Optics Express", "volume": "15", "number": "20", "publisher": "Optical Society of America", "pagerange": "12850-12865", "id_number": "CaltechAUTHORS:20150529-095936261", "issn": "1094-4087", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150529-095936261", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Space Agency (ESA)" } ] }, "doi": "10.1364/OE.15.012850", "primary_object": { "basename": "oe-15-20-12850.pdf", "url": "https://authors.library.caltech.edu/records/snxd7-r1125/files/oe-15-20-12850.pdf" }, "resource_type": "article", "pub_year": "2007", "author_list": "Mawet, Dimitri; Hanot, Charles; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k6f4z-3vk46", "eprint_id": 57846, "eprint_status": "archive", "datestamp": "2023-08-19 20:58:57", "lastmod": "2024-01-13 16:20:35", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Hanot-C", "name": { "family": "Hanot", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J." } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "D." } }, { "id": "Plesseria-J-Y", "name": { "family": "Plesseria", "given": "J. Y." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } } ] }, "title": "Fresnel Rhombs as Achromatic Phase Shifters for Infrared Nulling Interferometry: First experimental results", "ispublished": "unpub", "full_text_status": "public", "keywords": "Fresnel Rhomb, Achromatic Phase Shifters, nulling interferometry, subwavelength gratings, Zinc\nSelenide, bulk scattering", "note": "\u00a9 2007 Society of Photo-Optical Instrumentation Engineers (SPIE). September 19, 2007.\n\nThe authors acknowledge the financial support of ESA and of the Euro Space Society.\n\nPublished - 396500.pdf
", "abstract": "One of the most critical units of nulling interferometers is the Achromatic Phase Shifter. The concept we propose here is based on optimized Fresnel rhombs, using the total internal reflection phenomenon, modulated or not. The total internal reflection induces a phase shift between the polarization components of the incident light. We present the principles, the current status of the prototype manufacturing and testing operations, as well as preliminary experiments on a ZnSe Fresnel rhomb in the visible that have led to a first error source assessment study. Thanks to these first experimental results using a simple polarimeter arrangement, we have identified the bulk scattering as being the main error source. Fortunately, we have experimentally verified that the scattering can be mitigated using spatial filters and does not decrease the phase shifting capabilities of the ZnSe Fresnel rhomb.", "date": "2007-09-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 66931L", "id_number": "CaltechAUTHORS:20150527-090016715", "isbn": "9780819468413", "book_title": "Techniques and Instrumentation for Detection of Exoplanets Ill", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-090016715", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Space Agency (ESA)" }, { "agency": "Euro Space Society" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.758405", "primary_object": { "basename": "396500.pdf", "url": "https://authors.library.caltech.edu/records/k6f4z-3vk46/files/396500.pdf" }, "resource_type": "book_section", "pub_year": "2007", "author_list": "Hanot, C.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/x8stm-75s15", "eprint_id": 57720, "eprint_status": "archive", "datestamp": "2023-08-19 20:58:52", "lastmod": "2024-01-13 16:18:59", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Hanot-C", "name": { "family": "Hanot", "given": "Charles" } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J\u00e9rome" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } } ] }, "title": "The annular groove phase mask coronagraph: an achromatic optical vortex", "ispublished": "unpub", "full_text_status": "public", "keywords": "coronagraphy, optical vortices, subwavelength optical elements", "note": "\u00a9 2007 SPIE.\n\nThe authors acknowledge the financial support of the Belgian FNRS.\n\nPublished - 396499.pdf
", "abstract": "The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can be engineered and optimized to synthesize one of the theoretically most efficient coronagraphs. This paper briefly recalls the principles of the AGPM, presents the benefit of its implementation inside a polarimetric differential imager, realistic numerical simulations assessing its performances, as well as the current status of the near-infrared and visible prototype manufacturing operations.", "date": "2007-09-19", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 66931M", "id_number": "CaltechAUTHORS:20150520-142027045", "isbn": "978-0-8194-6841-3", "book_title": "Techniques and instrumentation for detection of exoplanets III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-142027045", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds de la Recherche Scientifique (FNRS)" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.758406", "primary_object": { "basename": "396499.pdf", "url": "https://authors.library.caltech.edu/records/x8stm-75s15/files/396499.pdf" }, "resource_type": "book_section", "pub_year": "2007", "author_list": "Mawet, Dimitri; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/h6pwn-wkk36", "eprint_id": 57871, "eprint_status": "archive", "datestamp": "2023-08-19 20:26:43", "lastmod": "2023-10-23 17:50:24", "type": "conference_item", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Annular Groove Phase Mask: an achromatic vortex coronagraph for differential polarimetric imaging", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2007.\n\nPublished - Mawet_Dimitri_poster.pdf
", "abstract": "n/a", "date": "2007-06-06", "date_type": "published", "publisher": "Caltech Library", "id_number": "CaltechAUTHORS:20150527-143938545", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-143938545", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Kalas-P", "name": { "family": "Kalas", "given": "Paul" } } ] }, "primary_object": { "basename": "Mawet_Dimitri_poster.pdf", "url": "https://authors.library.caltech.edu/records/h6pwn-wkk36/files/Mawet_Dimitri_poster.pdf" }, "resource_type": "conference_item", "pub_year": "2007", "author_list": "Mawet, Dimitri" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/gckyt-kqx87", "eprint_id": 57721, "eprint_status": "archive", "datestamp": "2023-08-22 08:49:07", "lastmod": "2023-10-23 17:40:23", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Rouan-D", "name": { "family": "Rouan", "given": "Daniel" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } } ] }, "title": "The Four Quadrant Phase Mask Coronagraph and its avatars", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Exoplanet; Coronagraphy; Direct detection; Exoplan\u00e8tes; Coronographie; D\u00e9tection directe", "note": "\u00a9 2007 Acad\u00e9mie des sciences. Published by Elsevier Masson SAS.\n\nAvailable online 12 June 2007.", "abstract": "A renewal of interest into Lyot coronagraphy began about 10 years ago with the advent of the new and very demanding goal of detecting directly extrasolar planets. Among the new ideas, the Four Quadrant Phase Mask (4QPMC) has been rather prolific. The 4QPM coronagraph is based the peculiar design of binary phase mask (0,\u03c00,\u03c0) dividing the full field of view at the focal plane in four quadrants. The mutual destructive interferences of the coherent light of a source perfectly centered on the mask, produce a total nulling within the pupil image, as is demonstrated analytically. We first recall the concept and performance of the 4QPMC. We then analyse the different limitations in space or ground-based observations from simulations. We then address the issue of device manufacturing and give the status of the actual performance in laboratory. A section reviews the various instruments under development that are equipped with this component. We conclude with a panorama of the rest of the family of the 4QPMC, which comprises several variants proposed by different teams. More specifically we address the important question of the achromatization by describing the various ideas which are currently explored to solve this problem. Among them, some genuine ones, not yet published, are presented.", "date": "2007-04", "date_type": "published", "publication": "Comptes Rendus Physique", "volume": "8", "number": "3-4", "publisher": "Elsevier Masson SAS", "pagerange": "298-311", "id_number": "CaltechAUTHORS:20150520-143529612", "issn": "1631-0705", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-143529612", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1016/j.crhy.2007.05.004", "resource_type": "article", "pub_year": "2007", "author_list": "Rouan, Daniel; Baudrand, Jacques; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k58xs-k6v87", "eprint_id": 95554, "eprint_status": "archive", "datestamp": "2023-08-19 18:43:52", "lastmod": "2024-01-14 21:43:41", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "D." } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "S." } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J." } }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Anti-reflective sub-wavelength patterning of IR optics", "ispublished": "unpub", "full_text_status": "public", "keywords": "antireflective, infrared, moth-eye, replication", "note": "\u00a9 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). \n\nCSL acknowledges the Walloon region for financial support through the Euclid/Europa program.\n\nPublished - 63950L.pdf
", "abstract": "Thermal infrared (IR) lenses require efficient anti-reflection coating. Moth-eye (or egg-box) 2D subwavelength gratings have demonstrated their ability to reach a very high transmission for a wide wavelength and angular range. The use in thermal IR is simplified by the lower resolution for lithographic technology, compared to visible waveband. However, deeper structures must be engraved and lithography must be adapted to IR materials. In order to be cost-effective, the patterning must be produced by replication techniques, such as embossing. Our laboratory is now experimenting hot embossing of moth-eye patterns in chalcogenide substrates. In this paper, theoretical analysis, micro-lithographic technology and manufacturing processes are detailed.", "date": "2006-10-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 63950L", "id_number": "CaltechAUTHORS:20190517-082622240", "isbn": "9780819464934", "book_title": "Electro-Optical and Infrared Systems: Technology and Applications III", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190517-082622240", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Euclid/Europa Program" } ] }, "contributors": { "items": [ { "id": "Driggers-R-G", "name": { "family": "Driggers", "given": "Ronald G." } }, { "id": "Huckridge-D-A", "name": { "family": "Huckridge", "given": "David A." } } ] }, "doi": "10.1117/12.692449", "primary_object": { "basename": "63950L.pdf", "url": "https://authors.library.caltech.edu/records/k58xs-k6v87/files/63950L.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Vandormael, D.; Habraken, S.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/k7db8-97p88", "eprint_id": 57834, "eprint_status": "archive", "datestamp": "2023-08-22 06:57:55", "lastmod": "2023-10-23 17:48:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Herwats-E", "name": { "family": "Herwats", "given": "E." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Coronagraphic imaging of three weak-line T Tauri stars: evidence of planetary formation around PDS 70", "ispublished": "pub", "full_text_status": "public", "keywords": "stars: planetary systems: protoplanetary disks; stars: circumstellar matter; instrumentation: adaptive optics; methods: observational", "note": "\u00a9 2006 ESO. Article published by EDP Sciences.\n\nReceived 20 March 2006; accepted 20 June 2006.\n\nP.R. acknowledges the financial support of the University of Li\u00e8ge. D.M. acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". O.A. acknowledges the financial support of the \"Fond National de la Recherche Scientifique\". We thank J.-C. Augereau for the helpful discussions concerning infrared odeling. We thank N. Ageorge, T. Szeifert, and D. N\u00fcrnberger for their excellent assistance during the coronagraphic observations on the NACO instrument. The authors are also grateful to the anonymous referee who helped improve the manuscript.\n\nPublished - aa5232-06.pdf
", "abstract": "Context.High angular resolution imaging of nearby pre-main sequence stars with ages between 1 and 30 Myr can give valuable information on planet formation mechanisms. This range of ages is thought to correspond to the dissipation of the optically thick dust disks surrounding young stars and to the end of the planet formation.\nAims.This paper presents new observations of three weak-line T Tauri Stars (WTTS) of intermediate ages ranging from 7 to 16 Myr. It aims at increasing the knowledge and sample of circumstellar disks around \"old\" WTTS.\nMethods.We observed three stars with the VLT's NAOS-CONICA adaptive optics system in coronagraphic mode. The four-quadrant phase mask coronagraph was used to improve the dynamic range (by a factor of ~100) while preserving the high angular resolution (inner working angle of 0\".15).\nResults.One object of our sample (PDS 70), a K5 star, exhibits a brown dwarf companion and a disk in scattered light with a surface brightness power law of r^-2.8, extending from a distance of 14 to 140 AU (assuming a stellar distance of 140 pc) and an integrated luminosity of 16.7 mJy in the K_s-band. The mass of the companion can be estimated to be within a range between 27 and 50 Jupiter masses with an effective temperature of 2750 \u00b1 100K. This object also shows a resolved outflow stretching up to ~550 AU.\nConclusions.This newly detected circumstellar disk shows strong similarities with the disk around TW Hya, and adds to the observed population of \"old\" TTS surrounded by circumstellar material. Moreover, three clues of planetary formation are brought to light by this study.", "date": "2006-10-04", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "458", "number": "1", "publisher": "EDP Sciences", "pagerange": "317-325", "id_number": "CaltechAUTHORS:20150526-162610244", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-162610244", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "University of Li\u00e8ge" }, { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "Fond National de la Recherche scientifique de Belgique (FNRS)" } ] }, "doi": "10.1051/0004-6361:20065232", "primary_object": { "basename": "aa5232-06.pdf", "url": "https://authors.library.caltech.edu/records/k7db8-97p88/files/aa5232-06.pdf" }, "resource_type": "article", "pub_year": "2006", "author_list": "Riaud, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/av3t0-v5y24", "eprint_id": 57825, "eprint_status": "archive", "datestamp": "2023-08-19 18:04:19", "lastmod": "2024-01-13 16:20:19", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" } ] }, "title": "The 4m International Liquid Mirror Telescope (ILMT)", "ispublished": "unpub", "full_text_status": "public", "keywords": "liquid mirror telescope, CCD camera, gravitational lensing", "note": "\u00a9 2006 SPIE.\n\nThe ILMT project is supported by contract IUAP P5/36 \"P\u00f4le d'Attraction Interuniversitaire\", by the \"Communaut\u00e9 Fran\u00e7aise\" and the \"R\u00e9gion Wallonne de Belgique\", by the \"Fonds National de la Recherche Scientifique\"\nand the \"Li\u00e8ge University\", Belgium.\n\nPublished - 396504.pdf
", "abstract": "The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to correct for the TDI effect and a thinned, high quantum efficiency, 4K \u00d7 4K pixel equivalent CCD camera. It will be capable of subarcsecond imaging in the i'(760 nm) and possibly r', g' band(s) over a field of ~ 30' in diameter. This facility will be entirely dedicated to a deep photometric and astrometric variability survey over a period of ~ 5 years. In this paper, the working principle of liquid mirror telescopes is first recalled, along with the advantages and disadvantages of the latter over classical telescopes. Several science cases are described. For a good access to one of the galactic poles, the best image quality sites for the ILMT are located either in Northern Chile (latitude near -29\u00b030') or in North-East India (Nainital Hills, latitude near +29\u00b030'). At those geographic latitudes, a deep (i' = 22.5 mag.) survey will approximately cover 90 square degrees at high galactic latitude, which is very useful for gravitational lensing studies as well as for the identification of various classes of interesting galactic and extragalactic objects (cf. microlensed stars, supernovae, clusters, etc.). A description of the telescope, its instrumentation and the handling of the data is also presented.", "date": "2006-06-27", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 626704", "id_number": "CaltechAUTHORS:20150526-143552401", "isbn": "0-8194-6332-9", "book_title": "Ground-based and Airborne Telescopes", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150526-143552401", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "P\u00f4le d'Attraction Inter-Universitaire" }, { "agency": "Communaut\u00e9 fran\u00e7aise de Belgique \u2013 Actions de recherche concert\u00e9es" }, { "agency": "R\u00e9gion Wallonne de Belgique" }, { "agency": "Fonds National de la Recherche Scientifique (Belgium)" }, { "agency": "Li\u00e8ge University" } ] }, "contributors": { "items": [ { "id": "Stepp-L-M", "name": { "family": "Stepp", "given": "Larry M." } } ] }, "doi": "10.1117/12.671695", "primary_object": { "basename": "396504.pdf", "url": "https://authors.library.caltech.edu/records/av3t0-v5y24/files/396504.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Surdej, J. and Mawet, D." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/swy67-52m61", "eprint_id": 57847, "eprint_status": "archive", "datestamp": "2023-08-19 18:03:25", "lastmod": "2024-01-13 16:20:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C\u00e9dric" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Vandormael-D", "name": { "family": "Vandormael", "given": "Denis" } }, { "id": "Loicq-J", "name": { "family": "Loicq", "given": "J\u00e9rome" } }, { "id": "Verstraeten-D", "name": { "family": "Verstraeten", "given": "David" } }, { "id": "Fleury-K", "name": { "family": "Fleury", "given": "Karl" } }, { "id": "Habraken-S", "name": { "family": "Habraken", "given": "Serge" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Infrared Achromatic Phase Shifters using Modulated Total Internal Reflection", "ispublished": "unpub", "full_text_status": "public", "keywords": "Nulling interferometry, Achromatic Phase Shifters, total internal reflection, thin films, subwavelength\ngratings", "note": "\u00a9 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). June 28, 2006.\n\nThe first author acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". The authors also acknowledge the financial support of ESA.\n\nPublished - 396503.pdf
", "abstract": "We propose a new family of achromatic phase shifters that uses the modulated total internal reflection (TIR) phenomenon. These components can be seen as enhanced Fresnel rhombs for infrared applications like nulling interferometry and polarimetry. The TIR phenomenon comes with a differential phase shift between the polarization components of the incident light. Modulating the index transition at the TIR interface allows compensating for the intrinsic material dispersion in order to make the subsequent phase shift achromatic over broad bands. The modulation can be induced by a thin film of a well-chosen medium or a subwavelength grating whose parameters are specially optimized. We present results from theoretical simulations together with preliminary fabrication outcomes.", "date": "2006-06-22", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 62682J", "id_number": "CaltechAUTHORS:20150527-091322264", "isbn": "9780819463333", "book_title": "Advances in Stellar Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-091322264", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "European Space Agency (ESA)" } ] }, "contributors": { "items": [ { "id": "Monnier-J-D", "name": { "family": "Monnier", "given": "John D." } }, { "id": "Sch\u00f6ller-M", "name": { "family": "Sch\u00f6ller", "given": "Markus" } }, { "id": "Danchi-W-C", "name": { "family": "Danchi", "given": "William C." } } ] }, "doi": "10.1117/12.671572", "primary_object": { "basename": "396503.pdf", "url": "https://authors.library.caltech.edu/records/swy67-52m61/files/396503.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Mawet, Dimitri; Lenaerts, C\u00e9dric; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/z6rk6-4b210", "eprint_id": 57728, "eprint_status": "archive", "datestamp": "2023-08-19 17:56:01", "lastmod": "2023-10-23 17:42:24", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Schneider-J", "name": { "family": "Schneider", "given": "J." } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Tinetti-G", "name": { "family": "Tinetti", "given": "G." } }, { "id": "Schmid-H-M", "name": { "family": "Schmid", "given": "H. M." } }, { "id": "Stam-D", "name": { "family": "Stam", "given": "D." } }, { "id": "Udry-S", "name": { "family": "Udry", "given": "S." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Grasset-O", "name": { "family": "Grasset", "given": "O." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "SEE-COAST: The Super-Earth Explorer", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2006 Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique\n\nPublished - 2006sf2a.conf..0429S.pdf
", "abstract": "The Super-Earth Explorer Coronagraphic Off Axis Space Telescope (SEE-COAST) is a space mission concept to be submitted to ESA call for proposals. It is devoted to the direct imaging, in the visible, of the stellar light reflected by its planetary companion. Here we present the type of planetary characterization we may accomplish with SEE-COAST, and we include a brief description of the spacecraft and mission strategy.", "date": "2006-06", "date_type": "published", "publisher": "Soci\u00e9t\u00e9 Francaise d'Astronomie et d'Astrophysique", "id_number": "CaltechAUTHORS:20150521-072144402", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150521-072144402", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Barret-D", "name": { "family": "Barret", "given": "D." } }, { "id": "Casoli-F", "name": { "family": "Casoli", "given": "F." } }, { "id": "Contini-T", "name": { "family": "Contini", "given": "T." } }, { "id": "Lagache-G", "name": { "family": "Lagache", "given": "G." } }, { "id": "Lecavelier-A", "name": { "family": "Lecavelier", "given": "A." } }, { "id": "Pagani-L", "name": { "family": "Pagani", "given": "L." } } ] }, "corp_creators": { "items": [ "SEE-COAST Team" ] }, "primary_object": { "basename": "2006sf2a.conf..0429S.pdf", "url": "https://authors.library.caltech.edu/records/z6rk6-4b210/files/2006sf2a.conf..0429S.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Schneider, J.; Riaud, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/cc2rk-b6k19", "eprint_id": 57688, "eprint_status": "archive", "datestamp": "2023-08-19 17:49:55", "lastmod": "2024-01-13 16:18:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } } ] }, "title": "Subwavelength gratings for phase mask coronagraphy: the 4QZOG and AGPM coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "High angular resolution, Phase mask coronagraphy, Achromatic phase shifters,\nSubwavelength gratings, Space-variant gratings, Optical vortices", "note": "\u00a9 2006 International Astronomical Union. Cambridge University Press. Provided by the NASA Astrophysics Data System.\n\nD. Mawet and P. Riaud acknowledges the financial support of the Belgian \"Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture\" and the \"Pole d' Attraction Inter-Universitaire\", respectively.\n\nPublished - 2006dies_conf__361M.pdf
", "abstract": "We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements. The first one is an evolution of the four quadrant phase mask coronagraph (FQPM), which resolves the \u03c0 phase shift chromaticity issue: the four quadrant zeroth order grating (4QZOG). The second one is a totally new design consisting of an optical\nvortex induced by a space-variant grating: the annular groove phase mask (AGPM) coronagraph is fully symmetric and free from any \"shaded zones\". The potential performances of the 4QZOG and AGPM coronagraph are very good, ensuring, for instance, a theoretical contrast of 1.4 x 10^(-7) at 3\u03bb/D over the whole K band. These coronagraphs could be used alone on single-pupil telescopes either in space or on the ground (with an adaptive optics system) to detect exoplanets.", "date": "2006-05-02", "date_type": "published", "publisher": "Cambridge University Press", "place_of_pub": "New York, NY", "pagerange": "361-366", "id_number": "CaltechAUTHORS:20150520-090059986", "isbn": "9780521856072", "book_title": "Direct Imaging of Exoplanets: Science 8 Techniques. Proceedings IA U Colloquium", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-090059986", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la formation a la Recherche dans l'Industrie et dans l' Agriculture (Belgian)" }, { "agency": "Pole d' Attraction Inter-Universitaire (Belgian)" } ] }, "contributors": { "items": [ { "id": "Aime-C", "name": { "family": "Aime", "given": "C." } }, { "id": "Vakili-F", "name": { "family": "Vakili", "given": "F." } } ] }, "doi": "10.1017/S1743921306009598", "primary_object": { "basename": "2006dies_conf__361M.pdf", "url": "https://authors.library.caltech.edu/records/cc2rk-b6k19/files/2006dies_conf__361M.pdf" }, "resource_type": "book_section", "pub_year": "2006", "author_list": "Mawet, Dimitri and Riaud, Pierre" }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/m0qwa-yjs89", "eprint_id": 57706, "eprint_status": "archive", "datestamp": "2023-08-19 17:24:13", "lastmod": "2023-10-23 17:39:28", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "J." } }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "P." } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "A." }, "orcid": "0000-0001-9353-2724" }, { "id": "Dupuis-O", "name": { "family": "Dupuis", "given": "O." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } } ] }, "title": "The four-quadrant phase-mask coronagraph: white light laboratory results with an achromatic device", "ispublished": "pub", "full_text_status": "public", "keywords": "instrumentation: adaptive optics -- techniques: high angular resolution -- stars: planetary systems -- methods: observational", "note": "\u00a9 2006 ESO.\nArticle published by EDP Sciences.\n\nReceived 6 September 2005; Accepted 8 November 2005.\n\nD.M. acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". P.R. acknowledges the financial support of the \"P\u00f4le d'Attraction Inter-Universitaire\". We also are very grateful to the financial support of the \"BQR\" contract from the Paris-Meudon Observatory. We warmly acknowledge Olivier Absil and the anonymous referee for useful comments.\n\nPublished - aa4158-05.pdf
", "abstract": "Achromatic coronagraphs are the subject of intensive research since they will be mandatory for many programs which aim at detecting and characterizing exoplanets. We report a laboratory experiment assessing the performance of the Four-Quadrant Phase-Mask coronagraph (FQPM) over a broadband wavelength range (R\u22482). The achromatization of the FQPM is provided by achromatic halfwave plates (HWP). These phase shifters combine birefringent plates made of different materials with properly chosen thicknesses. The HWP thickness control is relaxed by two orders of magnitudes with respect to the classical (non-birefringent) dispersive plate approach. In our experiment we used a two stage stack of Quartz and MgF_2. This combination allows to cover a large spectral range in the visible (500-900nm) with a small phase error residual around \u03c0(\u22480.12 rad rms). With this achromatization, we obtained an attenuation of 755 on the white light PSF peak. This solution is directly applicable to ground-based telescopes using high order adaptive optics such as the ESO's VLT-Planet Finder project and could easily be transposed in the mid-infrared domain for future space-based missions like DARWIN/TPF.", "date": "2006-03", "date_type": "published", "publication": "Astronomy and Astrophysics", "volume": "448", "number": "2", "publisher": "EDP Sciences", "pagerange": "801-808", "id_number": "CaltechAUTHORS:20150520-105118860", "issn": "0004-6361", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-105118860", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA)" }, { "agency": "P\u00f4le d'Attraction Inter-Universitaire" }, { "agency": "Paris-Meudon Observatory" } ] }, "doi": "10.1051/0004-6361:20054158", "primary_object": { "basename": "aa4158-05.pdf", "url": "https://authors.library.caltech.edu/records/m0qwa-yjs89/files/aa4158-05.pdf" }, "resource_type": "article", "pub_year": "2006", "author_list": "Mawet, D.; Riaud, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/1h7cy-s2793", "eprint_id": 57719, "eprint_status": "archive", "datestamp": "2023-08-19 16:48:52", "lastmod": "2023-10-23 17:40:16", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } } ] }, "title": "Subwavelength surface-relief gratings for stellar coronagraphy", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2005 Optical Society of America.\n\nReceived 28 February 2005; revised manuscript received 23 June 2005; accepted 24 June 2005.\n\nD. Mawet acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture.\" P. Riaud and J. Surdej acknowledge the financial support of the \"P\u00f4le d'Attraction Inter-Universitaire.\"\n\nPublished - ao-44-34-7313.pdf
", "abstract": "We present a new design of a phase mask coronagraph implemented with subwavelength diffractive optical elements consisting of optimized surface-relief gratings. Phase mask coronagraphy is a recent technique that seeks to accommodate both high dynamic and high angular resolution imaging of faint sources around bright astrophysical objects such as exoplanets orbiting their host stars. The original design we propose is a new, integrated, and flexible solution to the \u03c0 phase-shift chromaticity of the phase mask coronagraphs. It will allow broadband observations, i.e., shorter integration times and object characterizations, by means of spectroscopic analysis. The feasibility of the component manufacturing is also considered through a tolerance study.", "date": "2005-12-01", "date_type": "published", "publication": "Applied Optics", "volume": "44", "number": "34", "publisher": "Optical Society of America", "pagerange": "7313-7321", "id_number": "CaltechAUTHORS:20150520-140705208", "issn": "0003-6935", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-140705208", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "P\u00f4le d'Attraction Inter-Universitaire" } ] }, "doi": "10.1364/AO.44.007313", "primary_object": { "basename": "ao-44-34-7313.pdf", "url": "https://authors.library.caltech.edu/records/1h7cy-s2793/files/ao-44-34-7313.pdf" }, "resource_type": "article", "pub_year": "2005", "author_list": "Mawet, Dimitri; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/m3apj-m4v11", "eprint_id": 57663, "eprint_status": "archive", "datestamp": "2023-08-22 04:26:39", "lastmod": "2023-10-23 17:37:00", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Annular Groove Phase Mask Coronagraph", "ispublished": "pub", "full_text_status": "public", "keywords": "circumstellar matter; planetary systems; techniques: high angular resolution", "note": "\u00a9 2005 American Astronomical Society. Received 2005 May 10; accepted 2005 July 17. \n\nD. M. acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture.\" P. R. and J. S. acknowledge the financial support of the \"P\u00f4le d'Attraction Inter-Universitaire.\"\n\nPublished - 62738.web.pdf
", "abstract": "We present a new phase mask coronagraph consisting in an optical vortex induced by a space-variant surface relief subwavelength grating. Phase mask coronagraphy is a recent technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exoplanets orbiting their parent stars or host galaxies of active galactic nuclei. Subwavelength gratings are known to be artificially birefringent. Their unique dispersive characteristics can be controlled through the grating geometry in order to synthesize achromatic phase shifters. We show that implementing them in a ring-shaped way produces a fully symmetric and achromatic coronagraph without any gap or \"dead zone.\" The practical manufacturing of the device is also discussed.", "date": "2005-11-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "633", "number": "2", "publisher": "American Astronomical Society", "pagerange": "1191-1200", "id_number": "CaltechAUTHORS:20150519-132103307", "issn": "0004-637X", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-132103307", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)" }, { "agency": "P\u00f4le d'Attraction Inter-Universitaire" } ] }, "doi": "10.1086/462409", "primary_object": { "basename": "62738.web.pdf", "url": "https://authors.library.caltech.edu/records/m3apj-m4v11/files/62738.web.pdf" }, "resource_type": "article", "pub_year": "2005", "author_list": "Mawet, D.; Riaud, P.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/v3g4y-y4778", "eprint_id": 57716, "eprint_status": "archive", "datestamp": "2023-08-19 16:34:03", "lastmod": "2023-10-23 17:40:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C\u00e9dric" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Use of subwavelength gratings in TIR incidence as achromatic phase shifters", "ispublished": "pub", "full_text_status": "public", "note": "\u00a9 2005 Optical Society of America.\n\nReceived 23 June 2005; revised 28 July 2005; accepted 25 August 2005.\n\nThe first and second authors acknowledge the financial support of the Belgian \"Fond pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\".\n\nPublished - oe-13-22-8686.pdf
", "abstract": "Nulling interferometry constitutes a very promising technique in observational astrophysics. This method consists in attenuating the signal of a bright astrophysical object in order to detect much fainter nearby features, e.g. exoplanets around their host star. An on-axis destructive interference is created by adjusting the phases of the beams coming from various telescopes. The huge flux ratio between the parent star and the planet (10^6 in the thermal infrared) requires unprecedented high performance broadband phase shifters. We present a new design for these key components called Achromatic Phase Shifters (APS). We propose to use subwavelength diffractive optical elements under total internal reflection (TIR) incidence. Our component can be seen as an evolution of the Fresnel Rhomb technology.", "date": "2005-10-31", "date_type": "published", "publication": "Optics Express", "volume": "13", "number": "22", "publisher": "Optical Society of America", "pagerange": "8686-8692", "id_number": "CaltechAUTHORS:20150520-133648562", "issn": "1094-4087", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150520-133648562", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fond pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture" } ] }, "doi": "10.1364/OPEX.13.008686", "primary_object": { "basename": "oe-13-22-8686.pdf", "url": "https://authors.library.caltech.edu/records/v3g4y-y4778/files/oe-13-22-8686.pdf" }, "resource_type": "article", "pub_year": "2005", "author_list": "Mawet, Dimitri; Lenaerts, C\u00e9dric; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/g3fyt-2hn40", "eprint_id": 57872, "eprint_status": "archive", "datestamp": "2023-08-19 16:29:28", "lastmod": "2024-01-13 16:20:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "Olivier" }, "orcid": "0000-0002-4006-6237" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "Jean" }, "orcid": "0000-0002-7005-1976" } ] }, "title": "The Four Quadrant-ZOG and Annular Groove Phase Mask Coronagraphs", "ispublished": "unpub", "full_text_status": "public", "keywords": "Phase mask coronagraphy, achromatic phase shifters, subwavelength gratings, space-variant gratings,\noptical vortices", "note": "\u00a9 2005 Society of Photo-Optical Instrumentation Engineers (SPIE). October 05, 2005.\n\nD. Mawet acknowledges the financial support of the Belgian \"Fonds pour la formation \u00e0 la Recherche dans l'Industrie et dans l'Agriculture\". P. Riaud and J. Surdej acknowledges the financial support of the \"P\u00f4le d'Attraction Inter-Universitaire\".\n\nPublished - 396505.pdf
", "abstract": "Phase mask coronagraphy is a technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exo-planets orbiting their parent stars or host galaxies around Active Galactic Nuclei. We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements consisting of optimized surface-relief gratings. The first one is an evolution of the Four Quadrant Phase Mask coronagraph, which resolves the \u03c0 phase shift chromaticity problem: the Four Quadrant Zeroth Order Grating (4QZOG). The second one is a totally new design consisting of an optical vortex induced by a space-variant grating: the Annular Groove Phase Mask (AGPM) coronagraph is fully symmetric and free from any \"shaded zones\". Some manufacturing hints are given.", "date": "2005-10-05", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "Art. No. 59051N", "id_number": "CaltechAUTHORS:20150527-145843389", "isbn": "9780819459107", "book_title": "Techniques and Instrumentation for Detection of Exoplanets II", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-145843389", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Fonds pour la Formation \u00e0 la Recherche dans l'\u00edndustrie et dans l'\u00c1griculture (FRIA-Belgium)" }, { "agency": "P\u00f4le d'Attraction Inter-Universitaire" } ] }, "contributors": { "items": [ { "id": "Coulter-D-R", "name": { "family": "Coulter", "given": "Daniel R." } } ] }, "doi": "10.1117/12.640363", "primary_object": { "basename": "396505.pdf", "url": "https://authors.library.caltech.edu/records/g3fyt-2hn40/files/396505.pdf" }, "resource_type": "book_section", "pub_year": "2005", "author_list": "Mawet, Dimitri; Riaud, Pierre; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/jtyjc-6kr22", "eprint_id": 57665, "eprint_status": "archive", "datestamp": "2023-08-22 03:57:12", "lastmod": "2023-10-23 17:37:07", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Absil-Olivier", "name": { "family": "Absil", "given": "O." }, "orcid": "0000-0002-4006-6237" } ] }, "title": "Limitation of the Pupil Replication Technique in the Presence of Instrumental Defects", "ispublished": "pub", "full_text_status": "public", "keywords": "planetary systems; stars: imaging; techniques: high angular resolution", "note": "\u00a9 2005 American Astronomical Society. Received 2005 February 25; accepted 2005 June 7; published 2005 July 5.\n\nWe are grateful for the referee, A. Greenaway, and F. H. P. Spaan for useful discussions and suggestions, especially concerning chromatic smearing. P. R. also acknowledges the financial support of the Belgian fund \"P\u00f4le d'Attraction Inter-universitaire (PAI).\"\n\nPublished - 19362.web.pdf
", "abstract": "Pupil replication has been proposed by Greenaway et al. as a new optical technique to improve the suppression of starlight in high dynamic imaging. This Letter extends numerical simulations in the two-dimensional case with various realistic imperfections (surface error, chromatic smearing, and pupil shift). These results demonstrate some strong limitations compared to single-pupil apodization techniques for exoplanet detection.", "date": "2005-07-20", "date_type": "published", "publication": "Astrophysical Journal Letters", "volume": "628", "number": "1", "publisher": "American Astronomical Society", "pagerange": "L81-L84", "id_number": "CaltechAUTHORS:20150519-132827943", "issn": "2041-8205", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-132827943", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Belgian fund \"P\u00f4le d'Attraction Inter-universitaire (PAI)\"" } ] }, "doi": "10.1086/432572", "primary_object": { "basename": "19362.web.pdf", "url": "https://authors.library.caltech.edu/records/jtyjc-6kr22/files/19362.web.pdf" }, "resource_type": "article", "pub_year": "2005", "author_list": "Riaud, P.; Mawet, D.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/c0xyt-kac77", "eprint_id": 57874, "eprint_status": "archive", "datestamp": "2023-08-19 14:31:22", "lastmod": "2024-01-13 16:20:46", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Chazelas-Bruno", "name": { "family": "Chazelas", "given": "Bruno" } }, { "id": "Valette-Claude", "name": { "family": "Valette", "given": "Claude" } }, { "id": "L\u00e9pine-Thierry", "name": { "family": "L\u00e9pine", "given": "Thierry" } }, { "id": "Barillot-Marc", "name": { "family": "Barillot", "given": "Marc" } }, { "id": "Brachet-Frank", "name": { "family": "Brachet", "given": "Frank" } }, { "id": "Dervaux-Sebastien", "name": { "family": "Dervaux", "given": "Sebastien" } }, { "id": "Fressin-Fran\u00e7ois", "name": { "family": "Fressin", "given": "Fran\u00e7ois" } }, { "id": "Gay-Jean", "name": { "family": "Gay", "given": "Jean" } }, { "id": "Gadret-Gregory", "name": { "family": "Gadret", "given": "Gregory" } }, { "id": "Lab\u00e8que-Alain", "name": { "family": "Lab\u00e8que", "given": "Alain" } }, { "id": "Launhardt-Ralph", "name": { "family": "Launhardt", "given": "Ralph" } }, { "id": "Mangin-Jacques", "name": { "family": "Mangin", "given": "Jacques" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" }, { "id": "Ollivier-Marc", "name": { "family": "Ollivier", "given": "Marc" } }, { "id": "Rabbia-Elke", "name": { "family": "Rabbia", "given": "Elke" } }, { "id": "Schmidt-Elke", "name": { "family": "Schmidt", "given": "Elke" } } ] }, "title": "Opto-thermo-mechanical numerical simulations of 3 different concepts of infrared achromatic phase shifters", "ispublished": "unpub", "full_text_status": "public", "keywords": "Darwin, numerical simulation, achromatic phase shifter, Nulling, Interferometry", "note": "\u00a9 2004 Society of Photo-Optical Instrumentation Engineers (SPIE). October 20, 2004.\n\nThis work has been done under The ESA contract N\u00b017 005/02/NL/JA. It would not have been possible without the help of the whole NULLTIMATE CONSORTIUM e.g : Alcatel Space, OCA, Kayser Threde .... , the PhD grant of the author (B.C.) is funded by CNRS and ALCATEL SPACE Industries.\n\nPublished - 396506.pdf
", "abstract": "The Darwin/TPF mission aims at detecting directly extra solar planets. It is based on the nulling interferometry, concept proposed by Bracewell in 1978, and developed since 1995 in several European and American laboratories. One of the key optical devices for this technique is the achromatic phase shifter (APS). This optical component is designed to produce a \u03c0 phase shift over the whole Darwin spectral range (i.e. 6-18 \u03bcm), and will be experimentally tested on the NULLTIMATE consortium nulling test bench (Lab\u00e8que et al). Three different concepts of APS are being simulated: dispersive plates focus crossing and field reversal. In this paper, we show how thermal, mechanical and optical models are merged into a single robust model, allowing a global numerical simulation of the optical component performances. We show how these simulations help us to optimizing the design and present results of the numerical model.", "date": "2004-10-20", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "689-697", "id_number": "CaltechAUTHORS:20150527-151159873", "isbn": "9780819454232", "book_title": "New Frontiers in Stellar Interferometry", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-151159873", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "European Space Agency", "grant_number": "17 005/02/NL/JA" }, { "agency": "Centre National de la Recherche Scientifique (CNRS)" }, { "agency": "ALCATEL SPACE Industries" } ] }, "contributors": { "items": [ { "id": "Traub-W-A", "name": { "family": "Traub", "given": "Wesley A." } } ] }, "doi": "10.1117/12.551587", "primary_object": { "basename": "396506.pdf", "url": "https://authors.library.caltech.edu/records/c0xyt-kac77/files/396506.pdf" }, "resource_type": "book_section", "pub_year": "2004", "author_list": "Chazelas, Bruno; Valette, Claude; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/hrttg-ffc70", "eprint_id": 57672, "eprint_status": "archive", "datestamp": "2023-08-22 02:01:29", "lastmod": "2023-10-23 17:37:34", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "L\u00e9ger-Alain", "name": { "family": "L\u00e9ger", "given": "A." } }, { "id": "Selsis-Franck", "name": { "family": "Selsis", "given": "F." }, "orcid": "0000-0001-9619-5356" }, { "id": "Sotin-Christophe", "name": { "family": "Sotin", "given": "C." } }, { "id": "Guillot-Tristan", "name": { "family": "Guillot", "given": "T." }, "orcid": "0000-0002-7188-8428" }, { "id": "Despois-Didier", "name": { "family": "Despois", "given": "D." } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Ollivier-Marc", "name": { "family": "Ollivier", "given": "M." } }, { "id": "Lab\u00e8que-Alain", "name": { "family": "Lab\u00e8que", "given": "A." } }, { "id": "Valette-Claude", "name": { "family": "Valette", "given": "C." } }, { "id": "Brachet-Frank", "name": { "family": "Brachet", "given": "F." } }, { "id": "Chazelas-Bruno", "name": { "family": "Chazelas", "given": "B." } }, { "id": "Lammer-Helmut", "name": { "family": "Lammer", "given": "H." } } ] }, "title": "A new family of planets? \"Ocean-Planets\"", "ispublished": "pub", "full_text_status": "restricted", "keywords": "Extrasolar planets; Ices; Exobiology", "note": "\u00a9 2004 Elsevier Inc. \n\nReceived 10 July 2003; revised 22 December 2003. Available online 19 March 2004. \n\nWe are grateful to C\u00e9cile Engrand, Olivier Grasset, Anthony Jones, Tobias Owen, and Daniele Pinti for their valuable help during this work. We thank N. Woolf and M. Marley for their relevant comments on the manuscript.", "abstract": "A new family of planets is considered which is in between the rocky terrestrial planets and the gaseous giants, \"Ocean-Planets.\" We present the possible formation, composition and internal structure of these putative planets. We consider their oceans, as well as their possible Exobiology interest. These exoplanets should be detectable by Space missions such as Eddington, Kepler, and possibly COROT (launch scheduled in 2006). They have a density lower than that of rocky planets. Their rather large radius would make them attractive targets for exoplanet spectroscopic missions such as Darwin/TPF, all the more because a robust biosignature appears to exist.", "date": "2004-06", "date_type": "published", "publication": "Icarus", "volume": "169", "number": "2", "publisher": "Elsevier", "pagerange": "499-504", "id_number": "CaltechAUTHORS:20150519-144745881", "issn": "0019-1035", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-144745881", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "doi": "10.1016/j.icarus.2004.01.001", "resource_type": "article", "pub_year": "2004", "author_list": "L\u00e9ger, A.; Selsis, F.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/sjn99-7qz36", "eprint_id": 92316, "eprint_status": "archive", "datestamp": "2023-08-19 13:08:09", "lastmod": "2024-01-14 21:27:08", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Lemarquis-F", "name": { "family": "Lemarquis", "given": "Fr\u00e9d\u00e9ric" } }, { "id": "Lequime-M", "name": { "family": "Lequime", "given": "Michel" } }, { "id": "Albrand-G", "name": { "family": "Albrand", "given": "G\u00e9rard" } }, { "id": "Escoubas-L", "name": { "family": "Escoubas", "given": "Ludovic" } }, { "id": "Simon-J-J", "name": { "family": "Simon", "given": "Jean-Jacques" } }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "Jacques" } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "Pierre" } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "Daniel" } }, { "id": "Boccaletti-A", "name": { "family": "Boccaletti", "given": "Anthony" }, "orcid": "0000-0001-9353-2724" }, { "id": "Baudoz-P", "name": { "family": "Baudoz", "given": "Pierre" } }, { "id": "Mawet-D", "name": { "family": "Mawet", "given": "Dimitri" }, "orcid": "0000-0002-8895-4735" } ] }, "title": "Manufacturing of four-quadrant phase mask for nulling interferometry in the thermal infrared", "ispublished": "unpub", "full_text_status": "public", "keywords": "Phase mask, exo-planet detection, nulling interferometry, Ion Assisted Deposition, Lift-off", "note": "\u00a9 2004 Society of Photo-optical Instrumentation Engineers (SPIE).\n\nPublished - 435.pdf
", "abstract": "The Four Quadrant Phase Mask is a key component for the design of advanced coronagraphs that may be used to search exo-planets. The validity of this concept has been demonstrated in the visible and need now to be demonstrated in the mid infrared. For this purpose, two components are manufactured for wavelengths 4.75 and 16.25 \u03bcm. This manufacturing requires the deposition of ZnSe layers using Ion Assisted Deposition, followed by a lift off process.", "date": "2004-02-25", "date_type": "published", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "435-443", "id_number": "CaltechAUTHORS:20190116-104008025", "isbn": "9780819451347", "book_title": "Advances in Optical Thin Films", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190116-104008025", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Amra-C", "name": { "family": "Amra", "given": "Claude" } }, { "id": "Kaiser-N", "name": { "family": "Kaiser", "given": "Norbert" } }, { "id": "Macleod-H-A", "name": { "family": "Macleod", "given": "H. Angus" } } ] }, "doi": "10.1117/12.513386", "primary_object": { "basename": "435.pdf", "url": "https://authors.library.caltech.edu/records/sjn99-7qz36/files/435.pdf" }, "resource_type": "book_section", "pub_year": "2004", "author_list": "Lemarquis, Fr\u00e9d\u00e9ric; Lequime, Michel; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/afafq-53c05", "eprint_id": 57875, "eprint_status": "archive", "datestamp": "2023-08-19 11:04:27", "lastmod": "2024-01-13 16:20:48", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Renotte-Y", "name": { "family": "Renotte", "given": "Y." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Achromatic Four Quadrant Phase Mask using the Dispersion of Form Birefringence", "ispublished": "unpub", "full_text_status": "public", "keywords": "Coronagraphy, 4-quadrant phase mask, achromaticity, subwavelength gratings, ZOGs, form birefringence", "note": "\u00a9 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). February 25, 2003.\n\nPublished - 396507.pdf
", "abstract": "We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually destructive interferences of the coherent light from the main source, our mask realises the pi phase shift using some properties of ZOGs (Zeroth Order Gratings) and according to an original scheme respecting the 4-quadrant symmetry. When the period of the one-dimension grating structure is smaller than the wavelength of the incident light, the structure becomes birefringent. The effective refractive indices depend on the wavelength. Using this feature, we can design a mask whose nulling e\u00b1ciency is maintained within a wide wavelength range. Numerical simulations were made according to the RCWT (Rigorous Coupled Wave Theory).", "date": "2003-02-25", "date_type": "published", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_pub": "Bellingham, WA", "pagerange": "182", "id_number": "CaltechAUTHORS:20150527-152842925", "isbn": "9780819446398", "book_title": "High-Contrast Imaging for Exo-Planet Detection", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150527-152842925", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Schultz-A-B", "name": { "family": "Schultz", "given": "Alfred B." } }, { "id": "Lyon-R-G", "name": { "family": "Lyon", "given": "Richard G." } } ] }, "doi": "10.1117/12.457918", "primary_object": { "basename": "396507.pdf", "url": "https://authors.library.caltech.edu/records/afafq-53c05/files/396507.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Lenaerts, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/s28jz-v3a50", "eprint_id": 57878, "eprint_status": "archive", "datestamp": "2023-08-19 10:36:25", "lastmod": "2024-01-13 16:20:50", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Renotte-Y", "name": { "family": "Renotte", "given": "Y." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Achromatic Four Quadrant Phase Mask Coronagraph using the Dispersion of Form Birefringence", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2003 EAS, EDP Sciences 2003. Published online 28 May 2003.\n\nPublished - 397046.pdf
", "abstract": "We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually destructive interferences of the coherent light from the main source, our mask realises the pi phase shift using some properties of ZOGs (Zeroth Order Gratings) and according to an original scheme respecting the 4-quadrant symmetry. When the period of the one-dimension grating structure is smaller than the wavelength of the incident light, the structure becomes birefringent. The effective refractive indices depend on the wavelength. Using this feature, we can design a mask whose nulling efficiency is maintained within a wide wavelength range. Numerical simulations were made according to the RCWT (Rigorous Coupled Wave Theory).", "date": "2003", "date_type": "published", "publisher": "EDP Sciences", "place_of_pub": "France", "pagerange": "117-128", "id_number": "CaltechAUTHORS:20150528-122813624", "isbn": "2-86883-687-9", "book_title": "Astronomy with High Contrast Imaging", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150528-122813624", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Aime-C", "name": { "family": "Aime", "given": "C." } }, { "id": "Soummer-R", "name": { "family": "Soummer", "given": "R." } } ] }, "doi": "10.1051/eas:2003056", "primary_object": { "basename": "397046.pdf", "url": "https://authors.library.caltech.edu/records/s28jz-v3a50/files/397046.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Lenaerts, C.; et el." }, { "id": "https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/vg9st-cjf91", "eprint_id": 57666, "eprint_status": "archive", "datestamp": "2023-08-19 10:36:20", "lastmod": "2024-01-13 16:18:33", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Mawet-D", "name": { "family": "Mawet", "given": "D." }, "orcid": "0000-0002-8895-4735" }, { "id": "Baudrand-J", "name": { "family": "Baudrand", "given": "J." } }, { "id": "Lenaerts-C", "name": { "family": "Lenaerts", "given": "C." } }, { "id": "Moraeu-V", "name": { "family": "Moreau", "given": "V." } }, { "id": "Riaud-P", "name": { "family": "Riaud", "given": "P." } }, { "id": "Rouan-D", "name": { "family": "Rouan", "given": "D." } }, { "id": "Surdej-J", "name": { "family": "Surdej", "given": "J." }, "orcid": "0000-0002-7005-1976" } ] }, "title": "Birefringent achromatic phase shifters for nulling interferometry and phase coronagraphy", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 2003 ESA Publications.\n\nPublished - 2003ESASP_539__519M.pdf
", "abstract": "Achromatic Phase Shifters are mandatory components in the field of nulling interferometry and phase coronagraphy. Indeed, in order to detect faint objects (e.g. exo-planets) around a central bright star, one must attenuate the latter by all means. To do this, the most efficient way is to \"create\" a destructive interference on the blinding light. This technique is called nulling and is common to the two fields mentioned above; the first with several telescopes, the second with only a single aperture. How does it work? The incoming light from the central object is divided into several beams on which one applies a differential \u03c0 phase shift by means of these so-called phase shifters. Then, when the beams are properly recombined together, they simply subtract from each other. \"Achromatic\" means that we can apply this process over a large spectral bandwidth. This quality will not only be required for the detection and characterization of exo-planets but also for several other astrophysical objects involving huge contrasts like dust shells around young bright stars, AGN,... The proposed birefringent phase shifters and the original implementation schemes we suggest should provide flexible and powerful solutions for these purposes.", "date": "2003", "date_type": "published", "publisher": "ESA Publications", "place_of_pub": "Noordick, Netherlands", "pagerange": "519-524", "id_number": "CaltechAUTHORS:20150519-134722638", "isbn": "92-9092-849-2", "book_title": "Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150519-134722638", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "contributors": { "items": [ { "id": "Fridlund-M", "name": { "family": "Fridlund", "given": "Malcolm" } }, { "id": "Lacoste-H", "name": { "family": "Lacoste", "given": "H." } } ] }, "primary_object": { "basename": "2003ESASP_539__519M.pdf", "url": "https://authors.library.caltech.edu/records/vg9st-cjf91/files/2003ESASP_539__519M.pdf" }, "resource_type": "book_section", "pub_year": "2003", "author_list": "Mawet, D.; Baudrand, J.; et el." } ]