Discrepancies between Limits and Measurements of Warm Dark Matter Properties

A limit on the expansion parameter a hNR at which dark matter becomes non-relativistic has been obtained from the observed minimum halo mass hosting Milky Way satellites. This limit is in disagreement with measurements. In the present study, we attempt to understand this disagreement. We find that the limit does not include the following phenomena: non-linear regeneration of the power spectrum of density perturbations, and the stripping of galaxy halos by neighboring galaxies. Considering these phenomena, we find that there is no longer a significant discrepancy between the limit and the measurements.