We show that the rapid formation of super-massive black holes in quasars can indeed be understood in terms of major galaxy mergers followed by disk accretion. The necessary short disk evolution time can be achieved provided the disk viscosity is sufficiently large, which, for instance, is the case for hydrodynamic turbulence, unlimited by shock dissipation. We present numerical calculations for a representative case. This general picture can account for (a) the presence of highly luminous quasars at redshifts z > 6; (b) for the peak in quasar activity at z ~ 2; and (c) for a subsequent rapid disappearance of quasars at later epochs.
|Title of host publication
|The Tenth Marcel Grossmann Meeting
|Subtitle of host publication
|On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories
|World Scientific Publishing Co.
|Number of pages
|Published - Jan 1 2006
ASJC Scopus subject areas
- General Physics and Astronomy