Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-04-09
Astrophys.J.595:614-623,2003
Astronomy and Astrophysics
Astrophysics
10 pages, 5 figures, submitted to ApJ
Scientific paper
10.1086/377475
We postulate that supermassive black-holes grow in the centers of galaxies until they unbind the galactic gas that feeds them. We show that the corresponding self-regulation condition yields a correlation between black-hole mass (Mbh) and galaxy velocity dispersion (sigma) as inferred in the local universe, and recovers the observed optical and X-ray luminosity functions of quasars at redshifts up to z~6 based on the hierarchical evolution of galaxy halos in a Lambda-CDM cosmology. With only one free parameter and a simple algorithm, our model yields the observed evolution in the number density of optically bright or X-ray faint quasars between 2
Loeb Abraham
Wyithe Stuart
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