The masses of supermassive black holes correlate almost perfectly with the velocity dispersions of their host bulges, Mbh~σα, where α=4.8+/-0.5. The relation is much tighter than the relation between Mbh and bulge luminosity, with a scatter no larger than expected on the basis of measurement error alone. Black hole masses recently estimated by Magorrian et al. lie systematically above the Mbh-σ relation defined by more accurate mass estimates, some by as much as 2 orders of magnitude. The tightness of the Mbh-σ relation implies a strong link between black hole formation and the properties of the stellar bulge.
The Astrophysical Journal
- Pub Date:
- August 2000
- Black Hole Physics;
- Galaxies: Evolution;
- Galaxies: Kinematics and Dynamics;
- ApJ, 539, L9. Rutgers Astrophysics Preprint Series No. 274 This version is slightly modified to fit within the ApJL page limits