The status of the galactic center gamma-ray excess

Hooper, Dan

doi:10.21468/SciPostPhysProc.12.006

The status of the galactic center gamma-ray excess

Journal Article · Mon Jul 03 00:00:00 UTC 2023 · SciPost Physics Proceedings

DOI:https://doi.org/10.21468/SciPostPhysProc.12.006· OSTI ID:1987967

Hooper, Dan ^[1]

Fermi National Accelerator Laboratory

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 $m_{X} \sim$ 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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1987967

Journal Information:: SciPost Physics Proceedings, Journal Name: SciPost Physics Proceedings Journal Issue: 12; ISSN 2666-4003

Publisher:: Stichting SciPostCopyright Statement

Country of Publication:: Netherlands

Language:: English

References (38)

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