Where to find a dark matter sterile neutrino?
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We propose a strategy of how to look for dark matter (DM) particles possessing a radiative decay channel and derive constraints on their parameters from observations of X-rays from our own Galaxy and its dwarf satellites. When applied to the sterile neutrinos in keV mass range, it allows a significant improvement of restrictions to its parameters, as compared with previous works.
5 pp, revtex; v3: 1-sigma limits have been replaced by more conservative 3-sigma limits, a picture illustrating the data analysis methods has been aded
5 pp, revtex; v3: 1-sigma limits have been replaced by more conservative 3-sigma limits, a picture illustrating the data analysis methods has been aded