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Title: The M {sub BH} versus M {sub G}σ{sup 2} relation and the accretion of supermassive black holes

We propose a possible scenario that can explain the physical processes underlying the relation log{sub 10}(M {sub BH}) = b + mlog{sub 10}(M {sub G}σ{sup 2}/c {sup 2}) between the mass M {sub BH} of supermassive black holes, growing in the center of many galaxies, and the kinetic energy of the corresponding bulges (M {sub G} being the bulge mass and σ the velocity dispersion). In a series of papers, this scaling law proved to be very useful to describe the evolution of galaxies thanks to its close similarity to the Hertzsprung-Russell diagram. Studying the relation with different samples of galaxies, we have generally found a slope that can vary between two extremal theoretical possibilities, m = 3/4 and m = 1. We will try to describe a possible scenario compatible with the second one. Finally, we also examine a case of a relation that is linear, not in kinetic energy, but in momentum parameter.
Authors:
 [1]
  1. Dipartimento di Ingegneria, Università del Sannio, Piazza Roma n. 21, I-82100 Benevento (Italy)
Publication Date:
OSTI Identifier:
22351518
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 784; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; DISPERSIONS; EVOLUTION; GALAXIES; HERTZSPRUNG-RUSSELL DIAGRAM; KINETIC ENERGY; MASS; SCALING LAWS; STATISTICS; VELOCITY