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.
@article{arxiv.1203.1164,
title = {Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits},
author = {C. Combet and D. Maurin and E. Nezri and E. Pointecouteau and J. A. Hinton and R. White},
journal= {arXiv preprint arXiv:1203.1164},
year = {2012}
}
Comments
6 pages, 3 figures, supplementary file available on demand, accepted for publication in PRD