AGN and Galaxy evolution from Deep X-ray surveys

Deep X–ray surveys are providing crucial information on the evolution of AGN and galaxies. We review some of the latest results based on the X–ray spectral analysis of the sources detected in the Chandra Deep Field South, namely: i) constraints on obscured accretion; ii) constraints on the missing fraction of the X–ray background; iii) the redshift distribution of Compton–thick sources and TypeII QSO; iv) the detection of star formation activity in high–z galaxies through stacking techniques; v) the detection of large scale structure in the AGN distribution and its effect on nuclear activity. Such observational findings are consistent with a scenario where nuclear activity and star formation processes develop together in an anti–hierarchical fashion.