Massive perturber-driven interactions of stars with a massive black hole

Details Massive perturber-driven interactions of stars with a massive black hole Massive perturber-driven interactions of stars with a massive black hole

2006-06-19

arxiv.org/abs/astro-ph/0606443v4

Astrophys.J.656:709-720,2007

Astronomy and Astrophysics

Astrophysics

12 pages, 4 figures, 3 tables. Accepted to ApJ. Extended section on the mass function of GMCs and clusters in the galactic cen

Scientific paper

10.1086/510377

We study the role of massive perturbers (MPs) in deflecting stars and binaries to almost radial ("loss-cone") orbits, where they pass near the central massive black hole (MBH), interact with it at periapse, and are ultimately destroyed. MPs dominate dynamical relaxation when the ratio of the 2nd moments of the MP and star mass distributions, mu_2=(N_p*)/(N_s*), satisfies mu_2>>1. We compile the MP mass function from published observations, and show that MPs in the nucleus of the Galaxy (mainly giant molecular clouds), and plausibly in late type galaxies generally, have 10^2

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