[ { "id": "https://authors.library.caltech.edu/records/cztxs-9g653", "eprint_id": 22990, "eprint_status": "archive", "datestamp": "2023-08-19 03:37:17", "lastmod": "2024-01-13 05:12:56", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Grin-D", "name": { "family": "Grin", "given": "Daniel" } }, { "id": "Smith-T-L", "name": { "family": "Smith", "given": "Tristan" } }, { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "Marc" }, "orcid": "0000-0001-7018-2055" } ] }, "title": "Thermal axion constraints in non-standard thermal histories", "ispublished": "unpub", "full_text_status": "public", "keywords": "Dark matter, axions, reheating, large-scale structure, big-bang nucleosynthesis", "note": "\u00a9 2010 American Institute of Physics. \n\nIssue Date: 30 August 2010. \n\nD.G. was supported by the Gordon and Betty Moore Foundation and thanks the organizers of Axions 2010. T.L.S. and M.K. were supported by DoE DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation.\n\n
Published - Grin2010p13183Aip_Conf_Proc.pdf
", "abstract": "There is no direct evidence for radiation domination prior to big-bang nucleosynthesis,\nand so it is useful to consider how constraints to thermally-produced axions change in non-standard\nthermal histories. In the low-temperature-reheating scenario, radiation domination begins as late as\n~1 MeV, and is preceded by significant entropy generation. Axion abundances are then suppressed,\nand cosmological limits to axions are significantly loosened. In a kination scenario, a more modest\nchange to axion constraints occurs. Future possible constraints to axions and low-temperature\nreheating are discussed.", "date": "2010-08-30", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "Melville, NY", "pagerange": "78-84", "id_number": "CaltechAUTHORS:20110318-145420435", "isbn": "978-0-7354-0824-1", "book_title": "AXIONS 2010", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110318-145420435", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG03-92-ER40701" } ] }, "local_group": { "items": [ { "id": "TAPIR" }, { "id": "Moore-Center-for-Theoretical-Cosmology-and-Physics" } ] }, "contributors": { "items": [ { "id": "Tanner-D-B", "name": { "family": "Tanner", "given": "D. B." } }, { "id": "van-Bibber-K-A", "name": { "family": "van Bibber", "given": "Karl A." } } ] }, "doi": "10.1063/1.3489561", "primary_object": { "basename": "Grin2010p13183Aip_Conf_Proc.pdf", "url": "https://authors.library.caltech.edu/records/cztxs-9g653/files/Grin2010p13183Aip_Conf_Proc.pdf" }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Grin, Daniel; Smith, Tristan; et el." }, { "id": "https://authors.library.caltech.edu/records/qvvh9-2y366", "eprint_id": 19075, "eprint_status": "archive", "datestamp": "2023-08-19 00:58:26", "lastmod": "2023-10-20 19:20:44", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Ackerman-L", "name": { "family": "Ackerman", "given": "Lotty" } }, { "id": "Buckley-M-R", "name": { "family": "Buckley", "given": "Matthew R." } }, { "id": "Carroll-S-M", "name": { "family": "Carroll", "given": "Sean M." }, "orcid": "0000-0002-4226-5758" }, { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "Marc" }, "orcid": "0000-0001-7018-2055" } ] }, "title": "Dark matter and dark radiation", "ispublished": "unpub", "full_text_status": "restricted", "note": "\u00a9 2010 World Scientific Pub. Co. \n\nM. B. would like to thank the organizers of the DARK 2009 conference and the Physics Department in the University of Canterbury. This wok was supported by DoE DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation.", "abstract": "We explore the feasibility and astrophysical consequences of a new long-range U(1) gauge field (\"dark electromagnetism\") that couples only to dark matter, not to the Standard Model. The dark matter consists of an equal number of positive and negative charges under the new force, but annihilations are suppressed if the dark matter mass is sufficiently high and the dark fine-structure constant \u03b1 is sufficiently small. The correct relic abundance can be obtained if the dark matter also couples to the conventional weak interactions, and we verify that this is consistent with particle-physics constraints. The primary limit on a comes from the demand that the dark matter be effectively collisionless in galactic dynamics, which implies \u03b1 \u227e 10^(-3) for TeV-scale dark matter. These values are easily compatible with constraints from structure formation and primordial nucleosynthesis. We raise the prospect of interesting new plasma effects in dark matter dynamics, which remain to be explored. This proceedings is based on the work presented originally in.(1)", "date": "2010", "date_type": "published", "publisher": "World Scientific", "place_of_pub": "Hackensack, NJ", "pagerange": "277-286", "id_number": "CaltechAUTHORS:20100715-111557235", "isbn": "978-981-4293-78-5", "book_title": "Dark matter in astrophysics and particle physics : proceedings of the 7th International Heidelberg Conference, Dark 2009, Christchurch, New Zealand, 18-24 January 2009", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100715-111557235", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG03-92-ER40701" }, { "agency": "Gordon and Betty Moore Foundation" } ] }, "local_group": { "items": [ { "id": "TAPIR" }, { "id": "Caltech-Theory" }, { "id": "Moore-Center-for-Theoretical-Cosmology-and-Physics" } ] }, "resource_type": "book_section", "pub_year": "2010", "author_list": "Ackerman, Lotty; Buckley, Matthew R.; et el." }, { "id": "https://authors.library.caltech.edu/records/45m47-et926", "eprint_id": 19280, "eprint_status": "archive", "datestamp": "2023-08-21 22:18:59", "lastmod": "2024-01-12 23:58:11", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Grin-D", "name": { "family": "Grin", "given": "Daniel" } }, { "id": "Smith-T-L", "name": { "family": "Smith", "given": "Tristan" } }, { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "Marc" }, "orcid": "0000-0001-7018-2055" } ] }, "title": "Axion Constraints in Non-standard Thermal Histories", "ispublished": "unpub", "full_text_status": "public", "keywords": "Dark matter; axions; reheating; large-scale structure; big-bang nucleosynthesis", "note": "\u00a9 2009 American Institute of Physics. \n\nIssue Date: 8 September 2009.\n\nD.G. was supported by the Gordon and Betty Moore Foundation and thanks the organizers of DM08. T.L.S. and M.K. were supported by DoE DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation.\n\nPublished - Grin2009p10928Aip_Conf_Proc.pdf
", "abstract": "There is no direct evidence for radiation domination prior to big-bang nucleosynthesis, and so it is useful to consider how constraints to thermally-produced axions change in non-standard thermal histories. In the low-temperature-reheating scenario, radiation domination begins as late as ~1 MeV, and is preceded by significant entropy generation. Axion abundances are then suppressed, and cosmological limits to axions are significantly loosened. In a kination scenario, a more modest change to axion constraints occurs. Future possible constraints to axions and low-temperature reheating are discussed.", "date": "2009-09-08", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "Melville, NY", "pagerange": "119-125", "id_number": "CaltechAUTHORS:20100804-142905281", "isbn": "978-0-7354-0703-9", "book_title": "Sources and detection of dark matter and dark energy in the universe", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100804-142905281", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Gordon and Betty Moore Foundation" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG03-92-ER40701" } ] }, "local_group": { "items": [ { "id": "TAPIR" }, { "id": "Moore-Center-for-Theoretical-Cosmology-and-Physics" } ] }, "doi": "10.1063/1.3232168", "primary_object": { "basename": "Grin2009p10928Aip_Conf_Proc.pdf", "url": "https://authors.library.caltech.edu/records/45m47-et926/files/Grin2009p10928Aip_Conf_Proc.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Grin, Daniel; Smith, Tristan; et el." }, { "id": "https://authors.library.caltech.edu/records/8db79-w9b82", "eprint_id": 8658, "eprint_status": "archive", "datestamp": "2023-08-22 09:48:53", "lastmod": "2024-01-12 23:12:37", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Medvedev-M-V", "name": { "family": "Medvedev", "given": "Mikhail V." } }, { "id": "Silva-L-O", "name": { "family": "Silva", "given": "Luis O." } }, { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "Marc" }, "orcid": "0000-0001-7018-2055" } ] }, "title": "Cluster magnetic fields from large scale structure shocks", "ispublished": "unpub", "full_text_status": "public", "keywords": "intergalactic magnetic fields; clusters of galaxies; shock wave effects; cosmology; astrophysical plasma; plasma simulation; plasma instability", "note": "\u00a9 2007 American Institute of Physics \n\nThe simulations were performed in the eXpp cluster at IST, Lisbon. The work of MVM has been supported by DoE grant DE-FG02-04ER54790, NASA grant NNG-04GM41G. The work of LOS was partially supported by FCT (Portugal) through grants PDCT/FP/FAT/50190/2003 and POCI/FIS/55905/2004. MK was supported by DoE DE-FG03-92-ER40701 and NASA NNG05GF69G.\n\nPublished - MEDaipcp07.pdf
", "abstract": "The origin of the micro-Gauss magnetic fields in galaxy clusters is one of the outstanding problem of modern cosmology. We suggest that these fields could have been produced via the Weibel instability operating at shocks during the Large-Scale Structure formation and at accretion shocks in Galaxy Clusters. We have performed three-dimensional particle-in-cell simulations of the nonrelativistic Weibel instability in an electron-proton plasma (with the ion-to-electron mass ratio of 100), in conditions typical of cosmological shocks. These simulations indicate that cluster fields could have been produced by shocks propagating through the intergalactic medium during the formation of large-scale structure or by shocks within the cluster. The strengths of the shock-generated fields range from tens of nano-Gauss in the intercluster medium to a few micro-Gauss inside galaxy clusters. We discuss whether and how our results may change with the change the mass ratio to the realistic value of 1836. We stress that even if the Weibel-generated small-scale magnetic fields decay with time, they can serve as seed fields that can be further amplified and inverse-cascade to larger scales by turbulent motions of post-shock MHD turbulence.", "date": "2007-08-28", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "Melville, NY", "pagerange": "117-122", "id_number": "CaltechAUTHORS:MEDaipcp07", "isbn": "978-0-7354-0443-4", "book_title": "Turbulence and Nonlinear Processes in Astrophysical Plasmas: 6th Annual International Astrophysics Conference, Oahu, Hawaii, 16-22 March 2007", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:MEDaipcp07", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG02-04ER54790" }, { "agency": "NASA", "grant_number": "NNG-04GM41G" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "PDCT/FP/FAT/50190/2003" }, { "agency": "Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT)", "grant_number": "POCI/FIS/55905/2004" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG03-92-ER40701" }, { "agency": "NASA", "grant_number": "NNG05GF69G" } ] }, "contributors": { "items": [ { "name": { "family": "Shaikh", "given": "Dastgeer" } }, { "name": { "family": "Zank", "given": "Gary P." } } ] }, "doi": "10.1063/1.2778953", "primary_object": { "basename": "MEDaipcp07.pdf", "url": "https://authors.library.caltech.edu/records/8db79-w9b82/files/MEDaipcp07.pdf" }, "resource_type": "book_section", "pub_year": "2007", "author_list": "Medvedev, Mikhail V.; Silva, Luis O.; et el." }, { "id": "https://authors.library.caltech.edu/records/hx4dn-8d145", "eprint_id": 101146, "eprint_status": "archive", "datestamp": "2023-08-21 21:52:13", "lastmod": "2023-10-19 22:28:49", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "Marc" }, "orcid": "0000-0001-7018-2055" }, { "id": "Buchalter-A", "name": { "family": "Buchalter", "given": "Ari" } } ] }, "title": "The Second Peak: The Dark-Energy Density and the Cosmic Microwave Background", "ispublished": "unpub", "full_text_status": "restricted", "keywords": "Dark Energy; Cosmological Constant; Optical Depth; Cosmic Microwave Background; Cosmological Parameter", "note": "\u00a9 2001 Springer-Verlag Berlin Heidelberg. \n\nWe thank P. Ullio for useful comments. We used CMBFAST [29] to calculate the power spectra. This work was supported in part by NSF AST-0096023, NASA NAGS-8506, and DoE DE-FG03-92-ER40701. AB also acknowledges the support of a Lee A. DuBridge Fellowship.", "abstract": "Supernova evidence for a negative-pressure dark energy (e. g., cosmological constant or quintessence) that contributes a fraction \u03a9_\u039b \u2243 0.7 of closure density has been bolstered by the discrepancy between the total density, \u03a9_(tot) \u2243 1, suggested by the location of the first peak in the cosmic microwave background (CMB) power spectrum and the nonrelativistic-matter density \u03a9_m \u2243 0.3 obtained from dynamical measurements. Here we show that the impending identification of the location of the second peak in the CMB power spectrum will provide an immediate and independent probe of the cosmological constant. As an aside, we show how the measured height of the first peak probably already points toward a low matter density and places upper limits to the reionization optical depth and gravitational-wave amplitude.", "date": "2001", "date_type": "published", "publisher": "Springer", "place_of_pub": "Berlin", "pagerange": "119-127", "id_number": "CaltechAUTHORS:20200205-144743826", "isbn": "978-3-642-07446-2", "book_title": "Sources and Detection of Dark Matter and Dark Energy in the Universe", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200205-144743826", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "AST-0096023" }, { "agency": "NASA", "grant_number": "NAGS-8506" }, { "agency": "Department of Energy (DOE)", "grant_number": "DE-FG03-92-ER40701" }, { "agency": "Lee A. DuBridge Fellowship" } ] }, "contributors": { "items": [ { "id": "Cline-D-B", "name": { "family": "Cline", "given": "David B." } } ] }, "doi": "10.1007/978-3-662-04587-9_11", "resource_type": "book_section", "pub_year": "2001", "author_list": "Kamionkowski, Marc and Buchalter, Ari" }, { "id": "https://authors.library.caltech.edu/records/n9hq9-qzd26", "eprint_id": 45685, "eprint_status": "archive", "datestamp": "2023-08-19 19:04:20", "lastmod": "2023-10-26 18:09:58", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Israel-M-H", "name": { "family": "Israel", "given": "M. H." }, "orcid": "0000-0002-8104-208X" }, { "id": "Jones-M-D", "name": { "family": "Jones", "given": "M. D." } }, { "id": "Kamionkowski-M", "name": { "family": "Kamionkowski", "given": "M. P." }, "orcid": "0000-0001-7018-2055" }, { "id": "Klarmann-J", "name": { "family": "Klarmann", "given": "J." } }, { "id": "Stone-E-C", "name": { "family": "Stone", "given": "E. C." }, "orcid": "0000-0002-2010-5462" }, { "id": "Waddington-C-J", "name": { "family": "Waddington", "given": "C. J." } }, { "id": "Binns-W-R", "name": { "family": "Binns", "given": "W. R." }, "orcid": "0000-0001-6110-3407" }, { "id": "Garrard-T-L", "name": { "family": "Garrard", "given": "T. L." } } ] }, "title": "Cosmic-Ray Energy Spectra Between Ten and Several Hundred GeV/amu for Elements from _(18)Ar to _(25)Ni--Results from HEAO-3", "ispublished": "unpub", "full_text_status": "public", "note": "\u00a9 INR. Provided by the NASA Astrophysics Data System.\n\nThis work was supported by NASA grants NAG 8-498, 500, 502, and NGR 05-002-160,\n24-005-050, and 26-008-001.\n\nPublished - 1987-03.pdf
", "abstract": "Using the relativistic rise of energy loss as a measure of energy, we have\ndetermined the energy dependence of the abundances relative to _(26)Fe of the elements _(18)Ar,\n_(19)K, _(20)Ca, _(21)Sc, _(22)Ti, _(23)V, and _(28)Ni, from 10 to several hundred Ge V /amu. From the energy\ndependence of the observed Ar/Fe and Ca/Fe ratios we infer primary source ratios for these\nelements.", "date": "1987", "date_type": "published", "publisher": "Proceedings of the 21st International Cosmic Ray Conference", "id_number": "CaltechAUTHORS:20140512-120447856", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140512-120447856", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NAG 8-498" }, { "agency": "NASA", "grant_number": "NAG 8-500" }, { "agency": "NASA", "grant_number": "NAG 8-502" }, { "agency": "NASA", "grant_number": "NGR 05-002-160" }, { "agency": "NASA", "grant_number": "NGR 24-005-050" }, { "agency": "NASA", "grant_number": "NGR 26-008-001" } ] }, "other_numbering_system": { "items": [ { "id": "1987-03", "name": "Space Radiation Laboratory" } ] }, "local_group": { "items": [ { "id": "Space-Radiation-Laboratory" } ] }, "contributors": { "items": [ { "id": "Kozyarivsky-V-A", "name": { "family": "Kozyarivsky", "given": "V. A." } } ] }, "primary_object": { "basename": "1987-03.pdf", "url": "https://authors.library.caltech.edu/records/n9hq9-qzd26/files/1987-03.pdf" }, "resource_type": "book_section", "pub_year": "1987", "author_list": "Israel, M. H.; Jones, M. D.; et el." } ]