Modeling the QSO luminosity and spatial clustering at low redshifts

F.Marulli,D.Crociani,M.Volonteri,E.Branchini,L.Moscardini

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We present our investigation about the ability of hierarchical models of QSO formation and evolution to match the observed luminosity, number counts and spatial clustering of quasars at redshifts z<2. These models assume that the QSO emission is triggered by galaxy mergers, that the mass of the central black hole correlates with halo properties and that quasars shine at their Eddington luminosity except, perhaps, during the very early stages of evolution.