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Direct x-ray constraints on sterile neutrino warm dark matter

Beacom, John F.; Watson, Casey R.; Yüksel, Hasan +1 more

Warm dark matter might more easily account for small scale clustering measurements than the heavier particles typically invoked in Λ cold dark matter (ΛCDM) cosmologies. In this paper, we consider a ΛWDM cosmology in which sterile neutrinos ν_s, with a mass m_s of roughly 1 100 keV, are the dark matter. We use the diffuse x-ray…

Restrictions on parameters of sterile neutrino dark matter from observations of galaxy clusters

Neronov, A.; Boyarsky, A.; Ruchayskiy, O. +1 more

We find restrictions on the mass and mixing angle of the dark matter sterile neutrinos using x-ray observations of Coma and Virgo galaxy clusters with XMM-Newton satellite. In the absence of clearly detectable line, we present detailed analysis of various methods of putting restrictions on mass and mixing angle of sterile neutrino. Our analysis pr…