Astrophysics > Cosmology and Nongalactic Astrophysics
[Submitted on 18 Jun 2024]
Title:Mildly boosted dark matter annihilation and reconciling indirect galactic signals
View PDF HTML (experimental)Abstract:The galactic center excess is a possible non-gravitational observation of dark matter; however, the canonical dark matter model (thermal freeze-out) is in conflict with other gamma-ray observations, in particular those made of the Milky Way's satellite dwarf galaxies. Here we consider the effects of a two-component dark matter model which results in minimally boosted particles that must remain bound to their host galaxy in order to produce an observational signal. This leads to a signal that is heavily dependent on galactic scale and can help reconcile the differences in the galactic center and dwarf galaxy measurements under the dark matter paradigm.
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