Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess
© 2019 American Physical Society. Statistical evidence has previously suggested that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin of the GCE usin...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/136577 |
| _version_ | 1826192349833723904 |
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| author | Leane, Rebecca K Slatyer, Tracy R |
| author_facet | Leane, Rebecca K Slatyer, Tracy R |
| author_sort | Leane, Rebecca K |
| collection | MIT |
| description | © 2019 American Physical Society. Statistical evidence has previously suggested that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin of the GCE using non-Poissonian template fitting (NPTF) methods. In a proof-of-principle example with simulated data, we discover that unmodeled sources in the Fermi bubbles can lead to a dark matter signal being misattributed to point sources by the NPTF. We discover striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, we conclude that dark matter may provide a dominant contribution to the GCE after all. |
| first_indexed | 2024-09-23T09:10:26Z |
| format | Article |
| id | mit-1721.1/136577 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:10:26Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1365772021-10-28T04:47:00Z Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess Leane, Rebecca K Slatyer, Tracy R © 2019 American Physical Society. Statistical evidence has previously suggested that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin of the GCE using non-Poissonian template fitting (NPTF) methods. In a proof-of-principle example with simulated data, we discover that unmodeled sources in the Fermi bubbles can lead to a dark matter signal being misattributed to point sources by the NPTF. We discover striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, we conclude that dark matter may provide a dominant contribution to the GCE after all. 2021-10-27T20:36:05Z 2021-10-27T20:36:05Z 2019 2021-07-01T11:49:32Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136577 en 10.1103/PHYSREVLETT.123.241101 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. application/pdf American Physical Society (APS) APS |
| spellingShingle | Leane, Rebecca K Slatyer, Tracy R Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title | Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title_full | Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title_fullStr | Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title_full_unstemmed | Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title_short | Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess |
| title_sort | revival of the dark matter hypothesis for the galactic center gamma ray excess |
| url | https://hdl.handle.net/1721.1/136577 |
| work_keys_str_mv | AT leanerebeccak revivalofthedarkmatterhypothesisforthegalacticcentergammarayexcess AT slatyertracyr revivalofthedarkmatterhypothesisforthegalacticcentergammarayexcess |