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Dark Matter spikes around Sgr A* in $\gamma$-rays

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arxiv 2303.12107 v2 pith:3NLOUDQU submitted 2023-03-21 hep-ph astro-ph.HE

Shyam Balaji , Divya Sachdeva , Filippo Sala , Joseph Silk This is my paper · ORCID
classification hep-phastro-ph.HE
keywords arounddarkgammahalolimitsmatterpeakedspike
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abstract

We use H.E.S.S. $\gamma$-ray observations of Sgr A* to derive novel limits on the Dark Matter (DM) annihilation cross-section. We quantify their dependence on uncertainties i) in the DM halo profile, which we vary from peaked to cored, and ii) in the shape of the DM spike around Sgr A*, dynamically heated by the nuclear star cluster. For peaked halo profiles and depending on the heating of the spike, our limits are the strongest existing ones for DM masses above a few TeV. Our study contributes to assessing the influence of the advancements in our knowledge of the Milky Way on determining the properties of DM particles.

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Forward citations

Cited by 6 Pith papers

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

  1. Flavorful Interactions of AGN Neutrinos with Dark Matter Spike

    hep-ph 2026-07 conditional novelty 6.5 of 10

    IceCube-Gen2 flavor ratios can discriminate a U(1) neutrino–dark-matter model in AGN spikes from the standard (1/3:1/3:1/3) and muon-damped predictions, and, combined with mass-ordering and tau-decay data, constrain t...

  2. Dark matter energy exchange in stars orbiting supermassive black holes

    hep-ph 2026-07 unverdicted novelty 6.0 of 10

    Orbit-averaged elastic DM scattering in S4714 reaches stellar luminosity at σ_χp ∼ 10^{-36} cm² (MeV–GeV) and σ_χe ∼ 5×10^{-38} cm² (sub-MeV) for a spiked profile.

  3. Constraining Dark Photon Dark Matter with Radio Silence from Soliton Mergers around Supermassive Black Holes

    hep-ph 2025-09 conditional novelty 6.0 of 10

    Non-observation of radio bursts from soliton mergers around supermassive black holes constrains dark photon solitons to make up less than about 1% of dark matter, with future surveys reaching 0.2%.

  4. Dark matter explanations for the neutrino emission from the Seyfert galaxy NGC 1068

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Dark matter annihilations inside the black hole's density spike in NGC 1068 could produce the IceCube neutrino excess while staying hidden from gamma-ray and Milky Way searches.

  5. Probing the sensitivity of CTAO-N LSTs observations at large zenith angles to the multi-TeV gamma-ray emission from the inner 10 parsecs of the Galactic Center

    astro-ph.HE 2025-06 conditional novelty 5.0 of 10

    A simulation predicts that 500 hours of CTAO-North four-LST observations at large zenith angles can discriminate between dark-matter, millisecond-pulsar, and proton-induced models of the Galactic Center TeV source HES...

  6. Indirect dark matter searches with neutrino telescopes via energetic cosmic showers

    hep-ph 2025-09 reject novelty 3.0 of 10

    Bounds on Z'-mediated dark matter are derived from neutrino telescopes, freeze-in, and cosmic strings, but the telescope bounds rest on comparing a Galactic-center flux to faraway sources.

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