The study of the cross-correlation angular power spectrum between gravitational tracers and electromagnetic signals can be a powerful tool to constrain Dark Matter (DM) microscopic properties. In this work we correlate \Fermi\ diffuse \g-ray maps with catalogues of galaxy clusters. To emphasize the sensitivity to a DM signal, we select clusters at low-redshift 0<z<0.2 and with large-halo mass M500>1013M⊙. The analysis is performed with four catalogues in different wavebands, including infrared, optical and X-rays. No evidence for a DM signal is identified. On the other hand, we derive competitive bounds: the thermal cross-section is excluded at 95\% C.L. for DM masses below 20 GeV and annihilation in the τ+−τ− channel.
@article{arxiv.1907.06905,
title = {Bounds on WIMP dark matter from galaxy clusters at low redshift},
author = {Xiuhui Tan and Manuel Colavincenzo},
journal= {arXiv preprint arXiv:1907.06905},
year = {2020}
}