Accretion on massive black holes in galactic nuclei

Details Accretion on massive black holes in galactic nuclei Accretion on massive black holes in galactic nuclei

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.280..214g&link_type=abstract

Nature, vol. 280, July 19, 1979, p. 214, 215.

Astronomy and Astrophysics

Astronomy

18

Black Holes (Astronomy), Galactic Nuclei, Stellar Mass Accretion, Angular Momentum, Disks, Galactic Evolution, Interstellar Gas

Scientific paper

The accretion of the gas released in the tidal break-up of stars in galactic nuclei by a massive black hole onto the black hole is examined. Considerations of the evolution time scale for the accretion of the first stellar remnant disk onto the black hole and the time scale between two stellar breakups leads to the specification of a critical black hole mass in terms of star density and velocity dispersion in the galactic nucleus, above which the accretion is quasi-spherical and below which it assumes a disk shape. In addition, the accretion of gas lost in stellar evolution is shown to be in a disk regime, while that lost in the break-up of stars by collisions is quasi-spherical; only interstellar gas flows have sufficient angular momentum to ensure disk accretion regardless of black hole mass.

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