Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits

Details Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits

2012-03-06

arxiv.org/abs/1203.1164v1

PRD 85, 063517 (2012)

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 3 figures, supplementary file available on demand, accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.85.063517

We show that a stacking approach to galaxy clusters can improve current limits on decaying dark matter by a factor $\gtrsim 5-100$, 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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