[ { "id": "https://authors.library.caltech.edu/records/4gkkn-gw092", "eprint_id": 100867, "eprint_status": "archive", "datestamp": "2023-08-19 19:07:18", "lastmod": "2023-10-19 22:11:35", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Andrade-Santos-F", "name": { "family": "Andrade-Santos", "given": "Felipe" }, "orcid": "0000-0002-8144-9285" }, { "id": "van-Weeren-R-J", "name": { "family": "van Weeren", "given": "Reinout J." }, "orcid": "0000-0002-0587-1660" }, { "id": "Di-Gennaro-G", "name": { "family": "Di Gennaro", "given": "Gabriella" }, "orcid": "0000-0002-8648-8507" }, { "id": "Wittman-D", "name": { "family": "Wittman", "given": "David" }, "orcid": "0000-0002-0813-5888" }, { "id": "Ryu-Dongsu", "name": { "family": "Ryu", "given": "Dongsu" }, "orcid": "0000-0002-5455-2957" }, { "id": "Lal-D-V", "name": { "family": "Lal", "given": "Dharam Vir" }, "orcid": "0000-0001-5470-305X" }, { "id": "Placco-V-M", "name": { "family": "Placco", "given": "Vinicius M." }, "orcid": "0000-0003-4479-1265" }, { "id": "Fogarty-K", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "id": "Jee-M-James", "name": { "family": "Jee", "given": "M. James" } }, { "id": "Stroe-A", "name": { "family": "Stroe", "given": "Andra" } }, { "id": "Sobral-D", "name": { "family": "Sobral", "given": "David" }, "orcid": "0000-0001-8823-4845" }, { "id": "Forman-W-R", "name": { "family": "Forman", "given": "William R." }, "orcid": "0000-0002-9478-1682" }, { "id": "Jones-Christine", "name": { "family": "Jones", "given": "Christine" } }, { "id": "Kraft-R-P", "name": { "family": "Kraft", "given": "Ralph P." }, "orcid": "0000-0002-0765-0511" }, { "id": "Murray-S-S", "name": { "family": "Murray", "given": "Stephen S." } }, { "id": "Br\u00fcggen-M", "name": { "family": "Br\u00fcggen", "given": "Marcus" } }, { "id": "Kang-Hyesung", "name": { "family": "Kang", "given": "Hyesung" }, "orcid": "0000-0002-4674-5687" }, { "id": "Santucci-R-M", "name": { "family": "Santucci", "given": "Rafael" }, "orcid": "0000-0002-7529-1442" }, { "id": "Golovich-N", "name": { "family": "Golovich", "given": "Nathan" }, "orcid": "0000-0003-2632-572X" }, { "id": "Dawson-W", "name": { "family": "Dawson", "given": "William" }, "orcid": "0000-0003-0248-6123" } ] }, "title": "Chandra Observations of the Spectacular A3411\u201312 Merger Event", "ispublished": "pub", "full_text_status": "public", "keywords": "galaxies: clusters: general \u2013 galaxies: clusters: individual (A3411) \u2013 galaxies: clusters: intracluster\nmediu", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2019 May 31; revised 2019 October 8; accepted 2019 October 9; published 2019 December 6. \n\nWe thank Joseph DePasquale for creating the spectacular image displayed in Figure 1. F.A.-S. acknowledges support from Chandra grant G05-16133X. R.J.vW. acknowledges support from the VIDI research programme with project number 639.042.729, which is financed by the Netherlands Organisation for Scientific Research (NWO). G.D.G. acknowledges support from the ERC Advanced Investigator programme NewClusters 321271. W.R.F., and C.J. are supported by the Smithsonian Institution. C.J. acknowledges support from Chandra grant G016619003. M.J.J. acknowledges support for the current research from the National Research Foundation of Korea under the programs 2017R1A2B2004644 and 2017R1A4A1015178. D.R. and H.K. acknowledge support for the current research from the National Research Foundation of Korea under the programs 2016R1A5A1013277 and 2017R1A2A1A05071429. V.M.P. acknowledges partial support for this work from grant PHY 1430152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation (NSF). A.S. acknowledges support from the Clay Fellowship. Part of this was work performed under the auspices of the U.S. DOE by LLNL under Contract DE-AC52-07NA27344.\n\n
Published - Andrade-Santos_2019_ApJ_887_31.pdf
Accepted Version - 1910.07405.pdf
", "abstract": "We present deep Chandra observations of A3411\u201312, a remarkable merging cluster that hosts the most compelling evidence for electron reacceleration at cluster shocks to date. Using the Y_X\u2212M scaling relation, we find r\u2085\u2080\u2080 ~ 1.3 Mpc, M\u2085\u2080\u2080 = (7.1\u00b10.7)\u00d710\u00b9\u2074 M_\u2299, kT = 6.5\u00b10.1 keV, and a gas mass of M_g,\u2085\u2080\u2080 = (9.7\u00b10.1)\u00d710\u00b9\u00b3 M_\u2299. The gas mass fraction within r\u2085\u2080\u2080 is f_g = 0.14\u00b10.01. We compute the shock strength using density jumps to conclude that the Mach number of the merging subcluster is small (M\u2a7d1.15+^(0.14)_(\u22120.09)). We also present density, temperature, pseudo-pressure, and pseudo-entropy maps. Based on the pseudo-entropy map, we conclude that the cluster is undergoing a mild merger, consistent with the small Mach number. On the other hand, radio relics extend over Mpc scale in the A3411\u201312 system, which strongly suggests that a population of energetic electrons already existed over extended regions of the cluster.", "date": "2019-12-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "887", "number": "1", "publisher": "American Astronomical Society", "pagerange": "Art. No. 31", "id_number": "CaltechAUTHORS:20200123-092045785", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200123-092045785", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "G05-16133X" }, { "agency": "Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)", "grant_number": "639.042.729" }, { "agency": "European Research Council (ERC)", "grant_number": "321271" }, { "agency": "Smithsonian Institution" }, { "agency": "NASA", "grant_number": "G016619003" }, { "agency": "National Research Foundation of Korea", "grant_number": "2017R1A2B2004644" }, { "agency": "National Research Foundation of Korea", "grant_number": "2017R1A4A1015178" }, { "agency": "National Research Foundation of Korea", "grant_number": "2016R1A5A1013277" }, { "agency": "National Research Foundation of Korea", "grant_number": "2017R1A2A1A05071429" }, { "agency": "NSF", "grant_number": "PHY-1430152" }, { "agency": "Smithsonian Astrophysical Observatory" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-AC52-07NA27344" } ] }, "doi": "10.3847/1538-4357/ab4ce5", "primary_object": { "basename": "1910.07405.pdf", "url": "https://authors.library.caltech.edu/records/4gkkn-gw092/files/1910.07405.pdf" }, "related_objects": [ { "basename": "Andrade-Santos_2019_ApJ_887_31.pdf", "url": "https://authors.library.caltech.edu/records/4gkkn-gw092/files/Andrade-Santos_2019_ApJ_887_31.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Andrade-Santos, Felipe; van Weeren, Reinout J.; et el." }, { "id": "https://authors.library.caltech.edu/records/vhmpn-6n086", "eprint_id": 97574, "eprint_status": "archive", "datestamp": "2023-08-19 16:44:00", "lastmod": "2023-10-18 16:06:18", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Fogarty-K", "name": { "family": "Fogarty", "given": "Kevin" }, "orcid": "0000-0002-2691-2476" }, { "id": "Postman-Marc", "name": { "family": "Postman", "given": "Marc" }, "orcid": "0000-0002-9365-7989" }, { "id": "Li-Yuan", "name": { "family": "Li", "given": "Yuan" }, "orcid": "0000-0001-5262-6150" }, { "id": "Dannerbauer-H", "name": { "family": "Dannerbauer", "given": "Helmut" }, "orcid": "0000-0001-7147-3575" }, { "id": "Liu-Hauyu-Baobab", "name": { "family": "Liu", "given": "Hauyu Baobab" }, "orcid": "0000-0003-2300-2626" }, { "id": "Donahue-Megan", "name": { "family": "Donahue", "given": "Megan" }, "orcid": "0000-0002-2808-0853" }, { "id": "Ziegler-B", "name": { "family": "Ziegler", "given": "Bodo" } }, { "id": "Koekemoer-A-M", "name": { "family": "Koekemoer", "given": "Anton" }, "orcid": "0000-0002-6610-2048" }, { "id": "Frye-Brenda-L", "name": { "family": "Frye", "given": "Brenda" } } ] }, "title": "Dust and Molecular Gas in the Brightest Cluster Galaxy in MACS 1931.8-2635", "ispublished": "pub", "full_text_status": "public", "keywords": "galaxies: clusters: general \u2013 galaxies: clusters: individual (MACS J1931.8-2635) \u2013 galaxies: clusters:\nintracluster medium \u2013 galaxies: starburst \u2013 radio lines: galaxies", "note": "\u00a9 2019 The American Astronomical Society. \n\nReceived 2019 March 25; revised 2019 May 16; accepted 2019 May 16; published 2019 July 11. \n\nThe authors thank Piero Rosati and Miguel Verdugo for graciously providing the VLT/MUSE spectrum of the MACS 1931 BCG to us in advance of its publication. This paper makes use of the following ALMA data sets: ADS/JAO.ALMA#2016.1.00784.S and ADS/JAO.ALMA#2017.1.01205.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 was supported, in part, by NASA grant HSTGO-12065.01-A. The CLASH Multi-Cycle Treasury Program is based on observations made with the NASA/ESA Hubble Space Telescope and which is operated by the Space Telescope Science Institute. K.F. acknowledges financial support from the Troesh Prize Postdoctoral Fellowship from the California Institute of Technology. H.D. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) under the 2014 Ramon y Cajal program MINECO RYC-2014-15686. This research made use of APLpy, an open-source plotting package for Python (Robitaille & Bressert 2012). The authors would like to thank the anonymous referee for their quick response to the submitted manuscript.\n\nPublished - Fogarty_2019_ApJ_879_103.pdf
Accepted Version - 1905.01377.pdf
", "abstract": "We present new Atacama Large Millimeter Array observations of the molecular gas and far-infrared continuum around the brightest cluster galaxy (BCG) in the cool-core cluster MACS 1931.8-2635. Our observations reveal (1.9 \u00b1 0.3) \u00d7 10^(10) M\u2299 of molecular gas, on par with the largest known reservoirs of cold gas in a cluster core. We detect CO(1\u22120), CO(3\u22122), and CO(4\u22123) emission from both diffuse and compact molecular gas components that extend from the BCG center out to ~30 kpc to the northwest, tracing the UV knots and H\u03b1 filaments observed by the Hubble Space Telescope. Due to the lack of morphological symmetry, we hypothesize that the ~300 km s\u22121 velocity of the CO in the tail is not due to concurrent uplift by active galactic nucleus (AGN) jets; rather, we may be observing the aftermath of a recent AGN outburst. The CO spectral line energy distribution suggests that molecular gas excitation is influenced by processes related to both star formation and recent AGN feedback. Continuum emission in Bands 6 and 7 arises from dust and is spatially coincident with young stars and nebular emission observed in the UV and optical. We constrain the temperature of several dust clumps to be \u227e10 K, which is too cold to be directly interacting with the surrounding ~4.8 keV intracluster medium (ICM). The cold dust population extends beyond the observed CO emission and must either be protected from interacting with the ICM or be surrounded by local volumes of ICM that are several keV colder than observed by Chandra.", "date": "2019-07-10", "date_type": "published", "publication": "Astrophysical Journal", "volume": "879", "number": "2", "publisher": "American Astronomical Society", "pagerange": "Art. No. 103", "id_number": "CaltechAUTHORS:20190801-085014661", "issn": "1538-4357", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190801-085014661", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "HST-GO-12065.01-A" }, { "agency": "Caltech" }, { "agency": "Ministerio de Econom\u00eda, Industria y Competitividad (MINECO)", "grant_number": "RYC-2014-15686" } ] }, "doi": "10.3847/1538-4357/ab22a4", "primary_object": { "basename": "1905.01377.pdf", "url": "https://authors.library.caltech.edu/records/vhmpn-6n086/files/1905.01377.pdf" }, "related_objects": [ { "basename": "Fogarty_2019_ApJ_879_103.pdf", "url": "https://authors.library.caltech.edu/records/vhmpn-6n086/files/Fogarty_2019_ApJ_879_103.pdf" } ], "resource_type": "article", "pub_year": "2019", "author_list": "Fogarty, Kevin; Postman, Marc; et el." } ]