Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits
Abstract
We show that a stacking approach to galaxy clusters can improve current limits on decaying dark matter by a factor 5-100, with respect to a single source analysis, for all-sky instruments such as Fermi-LAT. Based on the largest sample of X-ray-selected galaxy clusters available to date (the MCXC meta-catalogue), we provide all the astrophysical information, in particular the astrophysical term for decaying dark matter, required to perform an analysis with current instruments.
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