The masses of supermassive black holes correlate almost perfectly with the velocity dispersions of their host bulges, M• / , where = 4.8±0.5. The relation is much tighter than the relation between M• and bulge luminosity, with a scatter no larger than expected on the basis of measurement error alone. Black hole masses estimated by Magorrian et al. (1998) lie systematically above the M• - relation defined by more accurate mass estimates, some by as much as two orders of magnitude. The tightness of the M• - relation implies a strong link between black hole formation and the properties of the stellar bulge (Refer to PDF file for exact formulas).
Department, Program, or Center
School of Physics and Astronomy (COS)
Astrophys.J. 539 (2000) L9
RIT – Main Campus