Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...283..301p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 283, no. 1, p. 301-312
Astronomy and Astrophysics
Astronomy
35
Black Holes (Astronomy), Eccentricity, Galactic Nuclei, Orbital Mechanics, Star Clusters, Circular Orbits, Gravitational Fields, Stellar Evolution
Scientific paper
In this work we describe analytically and numerically the evolution of the orbit of a comparatively low mass black hole (mbh) moving around a considerably more massive black hole (Mbh much greater than mbh) situated in the center of a massive galaxy. The less massive black hole owes its presence to a coalescence of the massive galaxy with some smaller galaxy which also contained a black hole in its center before the merger. Gravitational interaction with stars in the cluster (dynamical friction) results in loss of energy and angular momentum by the small galaxy (and its central hole) in such a way that, in the most probable cases, the eccentricity of the secondary black hole is rather small during the bulk of the time it spends within the core around the central black hole. Even a relatively small secondary hole orbiting close to it can replenish the 'loss-cone; in the stellar distribution around a massive black hole, and thereby trigger an enhanced fueling rate.
Polnarev Alexander G.
Rees Martin J.
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