Searching For Dark Matter Decay Annihilation in the Stacked X-ray Spectra of Galaxy Clusters
Abstract
Galaxy clusters are the largest cosmological reservoirs of dark matter, making them unique probes for the search of dark matter annihilation signal due to the existence of large dark matter haloes. We searched for spectral features of sterile neutrino annihilation in XMM-Newton X-rays observations of seventy brightest nearby galaxy clusters determined by their expected dark matter flux. I will present the constraints on the mass and mixing angle of the dark matter sterile neutrinos we obtained from this stacked analysis of the X-ray spectra in the emitter (blue-shifted) frame.
- Publication:
-
AAS/High Energy Astrophysics Division #13
- Pub Date:
- April 2013
- Bibcode:
- 2013HEAD...1311615B