Author:
Cirelli Marco,Fornengo Nicolao,Koechler Jordan,Pinetti Elena,Roach Brandon M.
Abstract
Abstract
Sub-GeV dark matter particles can annihilate or decay producing e
± pairs which
upscatter the low-energy photon fields in the Galaxy and generate an X-ray emission (via the
Inverse Compton effect). Using X-ray data from Xmm-Newton, Integral, NuStar
and Suzaku, we derive new constraints on this class of dark matter (DM). In the
annihilation case, our new bounds are the strongest available for DM masses above 180 MeV,
reaching 〈σv〉 ≲ 10-28 cm3/s for m
DM ≃
1 GeV. In the decay case, our bounds are the strongest to date over a large fraction of the
considered mass range, constraining τ ≳ 1028 s for m
DM ≃ 1
GeV and improving by up to 3 orders of magnitude upon existing limits.
Subject
Astronomy and Astrophysics
Cited by
3 articles.
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