http://arxiv.org/abs/1807.10034
In this paper we explore a scenario where the dark matter is a mixture of interacting and non interacting species. We observe that the effect on the matter power spectrum can ressemble the suppression of power expected in the case of non-negligible neutrino masses, though the effect described here manifests itself at smaller scales. We conclude that the lack of precise determination of the bias parameter could hinder our ability to disentangle the effect of neutrino masses from a mixture of collisional and collisionless dark matter fluids. This analysis is the first to highlight such a potential complication in the determination of neutrino masses owing to dark matter particle properties.
J. Stadler and C. Bœhm
Fri, 27 Jul 18
12/75
Comments: 5 pages, 3 figures