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Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2023

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

Résumé

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.

Dates et versions

hal-04060371 , version 1 (06-04-2023)

Identifiants

Citer

Shyam Balaji, Divya Sachdeva, Filippo Sala, Joseph Silk. Dark Matter spikes around Sgr A* in $\gamma$-rays. Journal of Cosmology and Astroparticle Physics, 2023, 2023 (08), pp.063. ⟨10.1088/1475-7516/2023/08/063⟩. ⟨hal-04060371⟩
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