Axion-like particles as Warm Dark Matter candidates: hints from the high-redshift Universe

In this talk, I will give an overview of keV axion-like particle as Dark Matter candidates. After giving an introduction to the cosmological aspects of (Warm) Dark Matter and given some details about possible production mechanisms of this type of Dark Matter, I will discuss the most recent results in the search for signature of axion-like particles in the high-redshift Universe.