Abstract
A systematic study of the environment of Radio Loud and Radio Quiet Quasars (RLQSO and RQQSO) at high-z has started using OSIRIS-GTC. The idea of the project is to search for LAE's in a region of ~4 Mpc around an object that has been drawn from our selected QSO sample. The environment of some high-z QSO's has been found to conform a region of proto-cluster formation. In particular, this study aims to provide a direct comparison between the environment of RLQSO and RQQSO and also to study the evolution of proto-clusters of galaxies with z. Our results will increase the amount of Lyman Alpha Emitters (LAE s') fields studied around QSOs known up to date. In this work we show some preliminary results obtained with OSIRIS+TFRED on the environment of the RQQSO SDSS J080849.42+521515.3 at z=4.46. We will show the presence of a few LAE's candidates that seems to be associated with the environment of this RQQSO.
