Impact of a (sub)dominant non-cold dark matter component on the large scale structure of the universe

Abstract

This thesis has been motivated by the necessity of studying the impact on the large scale structure of the universe by a dominant (warm dark matter), or subdominant (relic neutrinos) non-cold component of the dark matter. On one side, we have given an answer to the question whether warm dark matter can solve or alleviate the cusp/core problem, and on the other side, by studying the impact of relic neutrinos on non-lineal structures such as galaxy clusters or cosmological voids, we have searched for new cosmological observables that would be sensitive to the masses of the neutrinos.