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The Status of the Galactic Center Gamma-Ray Excess

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arxiv 2209.14370 v1 pith:EPHYHCKC submitted 2022-09-28 astro-ph.HE astro-ph.COhep-ph

Dan Hooper This is my paper · ORCID
classification astro-ph.HEastro-ph.COhep-ph
keywords excessgamma-raycentergalacticangularannihilatingdarkdistribution
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abstract

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 $m_X \sim 50 \, {\rm GeV}$ 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 {\it 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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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Search for GeV-scale Dark Matter from the Galactic Center with IceCube-DeepCore

    astro-ph.HE 2025-11 conditional novelty 6.0 of 10

    Using 9.28 years of IceCube-DeepCore data, no dark-matter neutrino signal is found from the Galactic Center, setting the strongest neutrino-telescope limits for GeV-scale annihilation and decay.

  2. Dark Sector Electroweak Baryogenesis In Light Of The Galactic Center Excess

    hep-ph 2025-08 conditional novelty 6.0 of 10

    A dark-sector electroweak baryogenesis model with a ~50 GeV fermionic dark matter candidate can simultaneously match the baryon asymmetry, the dark matter relic density, and (at ~2 sigma) the galactic center gamma-ray...

  3. Galactic Centre Pulsars with the SKAO

    astro-ph.HE 2026-07 accept novelty 4.0 of 10

    Updated SKA-MID sensitivity and multi-beam search strategies can detect up to ~84% of Galactic Centre pulsars (and ~60% of MSPs) under magnetar-like scattering, unlocking precision tests around Sgr A*.

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