The disk accretion of a tidally disrupted star onto a massive black hole

Details The disk accretion of a tidally disrupted star onto a massive black hole The disk accretion of a tidally disrupted star onto a massive black hole

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351...38c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 1, 1990, p. 38-46. Research supported by NSERC and McMaster Univ

Astronomy and Astrophysics

Astronomy

136

Accretion Disks, Black Holes (Astronomy), Stellar Physics, Active Galactic Nuclei, Mass To Light Ratios, Stellar Models, Stellar Orbits, Tides

Scientific paper

The consequences of the tidal disruption of a star by a massive black hole are considered. The initial extremely eccentric orbit of the stellar debris will become a circular orbit near the tidal radius after experiencing strong shocks which thermalize the orbital energy on a relatively short time scale. The subsequent evolution of the accretion disk is studied using a time-dependent alpha-disk model. It is suggested that some fraction of galaxies (particularly dwarf ellipticals) should be extremely bright at far-UV wavelengths if they contain black holes of 1 to 100 million solar masses. On the other hand, these results may argue against the presence of massive black holes in nearby galaxies such as M32.

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