The status of the galactic center gamma-ray excess
The Galactic Center Gamma-Ray Excess has a spectrum, angular distribution, and overall intensity that agree remarkably well with that expected from annihilating dark matter particles in the form of a $m_X \sim$ 50 GeV thermal relic. Previous claims that these photons are clustered on small angular s...
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| Format: | Article |
| Language: | English |
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SciPost
2023-07-01
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| Series: | SciPost Physics Proceedings |
| Online Access: | https://scipost.org/SciPostPhysProc.12.006 |
| _version_ | 1797788862872813568 |
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| author | Dan Hooper |
| author_facet | Dan Hooper |
| author_sort | Dan Hooper |
| collection | DOAJ |
| description | The Galactic Center Gamma-Ray Excess has a spectrum, angular distribution, and overall intensity that agree remarkably well with that expected from annihilating dark matter particles in the form of a $m_X \sim$ 50 GeV thermal relic. Previous claims that these photons are clustered on small angular scales or trace the distribution of known stellar populations once appeared to favor interpretations in which this signal originates from a large population of unresolved millisecond pulsars. More recent work, however, has overturned these conclusions, finding that the observed gamma-ray excess does not contain discernible small scale power, and is distributed with approximate spherical symmetry, not tracing any known stellar populations. In light of these results, it now appears significantly more likely that the Galactic Center Gamma-Ray Excess is produced by annihilating dark matter. |
| first_indexed | 2024-03-13T01:41:38Z |
| format | Article |
| id | doaj.art-45dceacb91e841078fd4e83ef62af4a9 |
| institution | Directory Open Access Journal |
| issn | 2666-4003 |
| language | English |
| last_indexed | 2024-03-13T01:41:38Z |
| publishDate | 2023-07-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Proceedings |
| spelling | doaj.art-45dceacb91e841078fd4e83ef62af4a92023-07-03T12:47:02ZengSciPostSciPost Physics Proceedings2666-40032023-07-011200610.21468/SciPostPhysProc.12.006The status of the galactic center gamma-ray excessDan HooperThe Galactic Center Gamma-Ray Excess has a spectrum, angular distribution, and overall intensity that agree remarkably well with that expected from annihilating dark matter particles in the form of a $m_X \sim$ 50 GeV thermal relic. Previous claims that these photons are clustered on small angular scales or trace the distribution of known stellar populations once appeared to favor interpretations in which this signal originates from a large population of unresolved millisecond pulsars. More recent work, however, has overturned these conclusions, finding that the observed gamma-ray excess does not contain discernible small scale power, and is distributed with approximate spherical symmetry, not tracing any known stellar populations. In light of these results, it now appears significantly more likely that the Galactic Center Gamma-Ray Excess is produced by annihilating dark matter.https://scipost.org/SciPostPhysProc.12.006 |
| spellingShingle | Dan Hooper The status of the galactic center gamma-ray excess SciPost Physics Proceedings |
| title | The status of the galactic center gamma-ray excess |
| title_full | The status of the galactic center gamma-ray excess |
| title_fullStr | The status of the galactic center gamma-ray excess |
| title_full_unstemmed | The status of the galactic center gamma-ray excess |
| title_short | The status of the galactic center gamma-ray excess |
| title_sort | status of the galactic center gamma ray excess |
| url | https://scipost.org/SciPostPhysProc.12.006 |
| work_keys_str_mv | AT danhooper thestatusofthegalacticcentergammarayexcess AT danhooper statusofthegalacticcentergammarayexcess |