We use H.E.S.S. γ-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.
@article{arxiv.2303.12107,
title = {Dark Matter spikes around Sgr A* in $\gamma$-rays},
author = {Shyam Balaji and Divya Sachdeva and Filippo Sala and Joseph Silk},
journal= {arXiv preprint arXiv:2303.12107},
year = {2023}
}
Comments
Published in JCAP, added discussion on energy resolution impact for DM annihilation into photons channel