Andrea Merloni (Max-Planck Institute for Astrophysics, Munich, Allemagne)
Par Stephane Charpinet - 12/11/2007
de l’Observatoire Midi-Pyrénées
(Max-Planck Institute for Astrophysics, Munich, Allemagne)
Jeudi 22 Novembre 2007 à 11h
Cosmological growth of Supermassive Black Holes
The growth of supermassive black holes (SMBH) through accretion is accompanied by the release of enormous amounts of energy which can either be radiated away, as happens in Quasars, advected into the black hole, or disposed of in kinetic form through powerful jets, as is observed in Radio Galaxies. I will describe the constraints available from a study of AGN evolution synthesis models on the growth of the SMBH population in the two main ’modes’ observed (`radio’ and `Quasar’, respectively). Also, I will discuss a new reliable and simple estimator of the kinetic power of growing SMBH in the radio mode. Based on this, the kinetic luminosity function for radio jets, and their total integrated power in the local universe can be derived. Finally, constraints on the redshift evolution of the AGN kinetic feedback will be briefly discussed and compared with the radiative output of the evolving SMBH population, thus providing a robust physical framework for phenomenological models of AGN feedback within structure formation.