Revised Rates of Stellar Disruption in Galactic Nuclei

Details Revised Rates of Stellar Disruption in Galactic Nuclei Revised Rates of Stellar Disruption in Galactic Nuclei

2003-05-27

arxiv.org/abs/astro-ph/0305493v2

Astrophys.J. 600 (2004) 149-161

Astronomy and Astrophysics

Astrophysics

11 pages, 9 figures, uses emulateapj.sty

Scientific paper

10.1086/379767

We compute rates of tidal disruption of stars by supermassive black holes in galactic nuclei, using downwardly-revised black hole masses from the M-sigma relation. In galaxies with steep nuclear density profiles, which dominate the overall event rate, the disruption frequency varies inversely with assumed black hole mass. We compute a total rate for non-dwarf galaxies that is about a factor ten higher than in earlier studies. Disruption rates are predicted to be highest in nucleated dwarf galaxies, assuming that such galaxies contain black holes. Monitoring of a rich galaxy cluster for a few years could rule out the existence of intermediate mass black holes in dwarf galaxies.

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