Talk Title: Black Hole Growth and the Black Hole Mass--Bulge Relations of AGNs
Abstract: We present black hole mass--bulge velocity dispersion relation for a complete sample of 75 soft X-ray selected AGNs. We find that NLS1s lie below the \mbh--\sig\ relation of BLS1s, confirming the Mathur \etal (2001) result. The statistical result is robust and not due to any systematic measurement error. This has important consequences towards our understanding of black hole formation and growth: black holes grow by accretion in well formed bulges, possibly after a major merger. As they grow, they get closer to the \mbh--\sig\ relation for normal galaxies. The accretion is highest in the beginning and dwindles as the time goes by. Our result does not support theories of \mbh--\sig\ relation in which the black hole mass is a constant fraction of the bulge mass/ velocity dispersion {\it at all times} or those in which bulge growth is controlled by AGN feedback.
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