Bounds on Light Dark Matter

TL;DR

This paper reviews cosmological and astrophysical constraints on light dark matter particles, especially sterile neutrinos, focusing on their mass range and interaction strengths to understand their viability as dark matter candidates.

Contribution

It provides a comprehensive overview of existing bounds on light dark matter, emphasizing sterile neutrinos, and discusses their implications for dark matter models.

Findings

Sterile neutrinos face significant cosmological constraints.

Light dark matter candidates are limited by astrophysical observations.

The mass range of keV to MeV is critically examined for viability.

Abstract

In this talk we review existing cosmological and astrophysical bounds on light (with the mass in keV - MeV range) and super-weakly interacting dark matter candidates. A particular attention is paid to the sterile neutrino DM candidate.