Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches
Dark matter in the halos surrounding galaxy groups and clusters can annihilate to high-energy photons. Recent advancements in the construction of galaxy group catalogs provide many thousands of potential extragalactic targets for dark matter. In this paper, we outline a procedure to infer the dark m...
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/114813 https://orcid.org/0000-0003-3472-7606 https://orcid.org/0000-0001-9531-1319 |
| _version_ | 1811076742043926528 |
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| author | Lisanti, Mariangela Mishra-Sharma, Siddharth Wechsler, Risa H. 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 Wechsler, Risa H. Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan |
| author_sort | Lisanti, Mariangela |
| collection | MIT |
| description | Dark matter in the halos surrounding galaxy groups and clusters can annihilate to high-energy photons. Recent advancements in the construction of galaxy group catalogs provide many thousands of potential extragalactic targets for dark matter. In this paper, we outline a procedure to infer the dark matter signal associated with a given galaxy group. Applying this procedure to a catalog of sources, one can create a full-sky map of the brightest extragalactic dark matter targets in the nearby Universe (z≲0.03), supplementing sources of dark matter annihilation from within the local group. As with searches for dark matter in dwarf galaxies, these extragalactic targets can be stacked together to enhance the signals associated with dark matter. We validate this procedure on mock Fermi gamma-ray data sets using a galaxy catalog constructed from the DarkSky N-body cosmological simulation and demonstrate that the limits are robust, at O(1) levels, to systematic uncertainties on halo mass and concentration. We also quantify other sources of systematic uncertainty arising from the analysis and modeling assumptions. Our results suggest that a stacking analysis using galaxy group catalogs provides a powerful opportunity to discover extragalactic dark matter and complements existing studies of Milky Way dwarf galaxies. |
| first_indexed | 2024-09-23T10:26:43Z |
| format | Article |
| id | mit-1721.1/114813 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:26:43Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1148132022-09-26T17:58:33Z Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches Lisanti, Mariangela Mishra-Sharma, Siddharth Wechsler, Risa H. 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 Dark matter in the halos surrounding galaxy groups and clusters can annihilate to high-energy photons. Recent advancements in the construction of galaxy group catalogs provide many thousands of potential extragalactic targets for dark matter. In this paper, we outline a procedure to infer the dark matter signal associated with a given galaxy group. Applying this procedure to a catalog of sources, one can create a full-sky map of the brightest extragalactic dark matter targets in the nearby Universe (z≲0.03), supplementing sources of dark matter annihilation from within the local group. As with searches for dark matter in dwarf galaxies, these extragalactic targets can be stacked together to enhance the signals associated with dark matter. We validate this procedure on mock Fermi gamma-ray data sets using a galaxy catalog constructed from the DarkSky N-body cosmological simulation and demonstrate that the limits are robust, at O(1) levels, to systematic uncertainties on halo mass and concentration. We also quantify other sources of systematic uncertainty arising from the analysis and modeling assumptions. Our results suggest that a stacking analysis using galaxy group catalogs provides a powerful opportunity to discover extragalactic dark matter and complements existing studies of Milky Way dwarf galaxies. United States. Department of Energy (Contract DESC00012567) United States. Department of Energy (Contract DESC0013999) 2018-04-19T20:37:49Z 2018-04-19T20:37:49Z 2018-03 2017-09 2018-03-15T18:00:57Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/114813 Lisanti, Mariangela et al. "Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches." Physical Review D 97, 6 (March 2018): 063005 © 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/PhysRevD.97.063005 Physical Review D 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 Wechsler, Risa H. Rodd, Nicholas Llewellyn Safdi, Benjamin Ryan Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title | Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title_full | Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title_fullStr | Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title_full_unstemmed | Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title_short | Mapping extragalactic dark matter annihilation with galaxy surveys: A systematic study of stacked group searches |
| title_sort | mapping extragalactic dark matter annihilation with galaxy surveys a systematic study of stacked group searches |
| url | http://hdl.handle.net/1721.1/114813 https://orcid.org/0000-0003-3472-7606 https://orcid.org/0000-0001-9531-1319 |
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