Black-hole stellar accretion in active galactic nuclei

Details Black-hole stellar accretion in active galactic nuclei Black-hole stellar accretion in active galactic nuclei

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..404h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 2, p. 404-408

Astronomy and Astrophysics

Astronomy

7

Active Galactic Nuclei, Astronomical Models, Black Holes (Astronomy), Dynamic Stability, Mass Transfer, Periodic Variations, Stellar Evolution, Stellar Mass Accretion, Angular Momentum, Gravitation, Relativity, Stellar Luminosity, X Ray Sources

Scientific paper

We consider the accretion of main sequence or slightly evolved stars by a massive Kerr black hole in an active galactic nucleus (AGN). We show that in many cases the stars are stably accreted via Roche lobe overflow over 104 - 105 yr. If several stars accrete simultaneously, this is sufficient to power typical AGN. Periodic modulations would be rather weak, as each star contributes only a fraction of the luminosity. Long term variability (years) might result from the dynamical instability of mass transfer from one of the stars.

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