Constraints on sterile neutrino dark matter from XMM--Newton observation of M33
arXiv:1109.5943 · doi:10.1111/j.1365-2966.2012.21498.x
Abstract
Using archival XMM-Newton observations of the diffuse and unresolved components emission in the inner disc of M33 we exclude the possible contribution from narrow line emission in the energy range 0.5-5 keV more intense than 10^{-6}-10^{-5} erg/s. Under the hypothesis that sterile neutrinos constitute the majority of the dark matter in M33, we use this result in order to put constraints on their parameter space in the 1-10 keV mass range.
5 pages, 5 figures. Accepted in MNRAS