arXiv:2303.12673·v2·High Energy Astrophysical Phenomena
All-sky limits on Sterile Neutrino Galactic Dark Matter obtained with SRG/ART-XC after two years of operations
E.I. Zakharov🇷🇺 · V.V. Barinov🇷🇺 · R.A. Burenin🇷🇺 · D.S. Gorbunov🇷🇺 · R.A. Krivonos🇷🇺 · A.Yu. Tkachenko🇷🇺 · V.A. Arefiev🇷🇺 · E.V. Filippova🇷🇺 · S.A. Grebenev🇷🇺 · A.A. Lutovinov🇷🇺 · I.A. Mereminsky🇷🇺 · S.Yu. Sazonov🇷🇺
Abstract
Dark matter sterile neutrinos radiatively decay in the Milky Way, which can be tested with searches for almost monochromatic photons in the X-ray cosmic spectrum. We analyse the data of SRG/ART-XC telescope operated for two years in the all-sky survey mode. With no significant hints in the Galactic diffuse X-ray spectrum we explore models with sterile neutrino masses in 12-40 keV range and exclude corresponding regions of sterile-active neutrino mixing.
Comments: 5 pages, 5 figures. Published in Phys. Rev. D