Search for Dark Matter Annihilation in Galaxy Groups
We use 413 weeks of publicly available Fermi Pass 8 gamma-ray data combined with recently developed galaxy group catalogs to search for evidence of dark matter annihilation in extragalactic halos. In our study, we use luminosity-based mass estimates and mass-to-concentration relations to infer the J...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/114804 https://orcid.org/0000-0003-3472-7606 https://orcid.org/0000-0001-9531-1319 |
| _version_ | 1811092939817877504 |
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| author | Lisanti, Mariangela Mishra-Sharma, Siddharth Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Lisanti, Mariangela Mishra-Sharma, Siddharth Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan |
| author_sort | Lisanti, Mariangela |
| collection | MIT |
| description | We use 413 weeks of publicly available Fermi Pass 8 gamma-ray data combined with recently developed galaxy group catalogs to search for evidence of dark matter annihilation in extragalactic halos. In our study, we use luminosity-based mass estimates and mass-to-concentration relations to infer the J factors and associated uncertainties for hundreds of galaxy groups within a redshift range z≲0.03. We employ a conservative substructure boost factor model, which only enhances the sensitivity by an O(1) factor. No significant evidence for dark matter annihilation is found, and we exclude thermal relic cross sections for dark matter masses below ∼30 GeV to 95% confidence in the bb[over ¯] annihilation channel. These bounds are comparable to those from Milky Way dwarf spheroidal satellite galaxies. The results of our analysis increase the tension but do not rule out the dark matter interpretation of the Galactic Center excess. We provide a catalog of the galaxy groups used in this study and their inferred properties, which can be broadly applied to searches for extragalactic dark matter. |
| first_indexed | 2024-09-23T15:36:30Z |
| format | Article |
| id | mit-1721.1/114804 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:36:30Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1148042022-09-29T15:00:55Z Search for Dark Matter Annihilation in Galaxy Groups Lisanti, Mariangela Mishra-Sharma, Siddharth Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan We use 413 weeks of publicly available Fermi Pass 8 gamma-ray data combined with recently developed galaxy group catalogs to search for evidence of dark matter annihilation in extragalactic halos. In our study, we use luminosity-based mass estimates and mass-to-concentration relations to infer the J factors and associated uncertainties for hundreds of galaxy groups within a redshift range z≲0.03. We employ a conservative substructure boost factor model, which only enhances the sensitivity by an O(1) factor. No significant evidence for dark matter annihilation is found, and we exclude thermal relic cross sections for dark matter masses below ∼30 GeV to 95% confidence in the bb[over ¯] annihilation channel. These bounds are comparable to those from Milky Way dwarf spheroidal satellite galaxies. The results of our analysis increase the tension but do not rule out the dark matter interpretation of the Galactic Center excess. We provide a catalog of the galaxy groups used in this study and their inferred properties, which can be broadly applied to searches for extragalactic dark matter. United States. Department of Energy (Contract DESC00012567) United States. Department of Energy (Contract DESC0013999) 2018-04-19T18:32:50Z 2018-04-19T18:32:50Z 2018-03 2017-09 2018-03-15T18:00:52Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/114804 Lisanti, Mariangela et al. "Search for Dark Matter Annihilation in Galaxy Groups." Physical Review Letters 120, 10 (March 2018): 101101 © 2018 American Physical Society https://orcid.org/0000-0003-3472-7606 https://orcid.org/0000-0001-9531-1319 en http://dx.doi.org/10.1103/PhysRevLett.120.101101 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Lisanti, Mariangela Mishra-Sharma, Siddharth Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan Search for Dark Matter Annihilation in Galaxy Groups |
| title | Search for Dark Matter Annihilation in Galaxy Groups |
| title_full | Search for Dark Matter Annihilation in Galaxy Groups |
| title_fullStr | Search for Dark Matter Annihilation in Galaxy Groups |
| title_full_unstemmed | Search for Dark Matter Annihilation in Galaxy Groups |
| title_short | Search for Dark Matter Annihilation in Galaxy Groups |
| title_sort | search for dark matter annihilation in galaxy groups |
| url | http://hdl.handle.net/1721.1/114804 https://orcid.org/0000-0003-3472-7606 https://orcid.org/0000-0001-9531-1319 |
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