Cosmological constraints on neutrinos with Planck data
Neutrinos take part in the evolution of the Universe influencing its history from radiation dominated early times until late structure formation.This makes cosmology and the Cosmic Microwave Background (CMB) a valuable tool for testing Neutrino Physics. The best measurement to date of full-sky CMB temperature and polarization anisotropies comes from the 2015 Planck release. Testing Planck data against precise theoretical predictions allow us to shed light on various interesting open questions such as the value of the absolute scale of neutrino masses or their energy density. I will describe different steps of this process from the actual building of a full temperature and polarization likelihood function, through the estimation of the parameters using different statistical tools, to the interpretation of the obtained constraints.