The problem of few black holes

Details The problem of few black holes The problem of few black holes

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989cemda..46..277v&link_type=abstract

Celestial Mechanics and Dynamical Astronomy (ISSN 0923-2958), vol. 46, no. 3, 1989, p. 277-285.

Astronomy and Astrophysics

Astronomy

1

Black Holes (Astronomy), Computerized Simulation, Galactic Structure, Quasars, Radio Emission, X Ray Binaries, Accretion Disks, Angular Momentum, Galactic Clusters, Gravitational Collapse, Light Curve, Radio Galaxies, Star Clusters, Three Body Problem

Scientific paper

The problem of few black holes becomes important in multiple mergers of galaxies. If supermassive black holes in centers of galaxies are common, then interaction of three or four supermassive black holes should also be common. The merger of two galaxies with one black hole each produces a semistable black-hole binary system. Subsequent mergers of galaxies with their own central black holes produces dynamical few-body evolution in which mergers of black holes occur. According to numerical simulations, this evolution typically ends when only one or two black holes remain and, in the latter, they are ejected in opposite directions from the center of the galaxy. Even when the initial black hole masses are picked at random from a wide distribution, the two black-hole ejections happen rather symmetrically. Sometimes the final masses differ considerably in which case only the lighter black hole is ejected. This is caused by the potential barrier of the galaxy itself which prevents the heavy slowly moving black hole flying out of the galaxy. OJ287 is discussed as a possible example of a multiple black-hole system.

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