Talk Title: Radiative feedback from quasars and the growth of supermassive black holes
Abstract: We assess the importance of photoionization plus Compton heating feedback on the growth of supermassive central BHs at the center of bulges and ellipticals, using the average quasar spectrum derived from cosmic background fields supplemented by other pieces of information. We present simple arguments supporting the idea that the establishement of the Mbh-sigma relation could be in fact due to the difference of such feedback on the gaseous component of spheroids of large and small mass
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