Oscillations of Thick Accretion Discs Around Black Holes
Astrophysics
2007-05-23 v1
Abstract
We present a numerical study of the response of a thick accretion disc to a localized, external perturbation with the aim of exciting internal modes of oscillation. We find that the perturbations efficiently excite global modes recently identified as acoustic p--modes, and closely related to the epicyclic oscillations of test particles. The two strongest modes occur at eigenfrequencies which are in a 3:2 ratio. We have assumed a constant specific angular momentum distribution within the disc. Our models are in principle scale--free and can be used to simulate accretion tori around stellar or super massive black holes.
Cite
@article{arxiv.astro-ph/0411654,
title = {Oscillations of Thick Accretion Discs Around Black Holes},
author = {Eduardo Rubio-Herrera and William H. Lee},
journal= {arXiv preprint arXiv:astro-ph/0411654},
year = {2007}
}
Comments
4 pages, 4 figures, accepted for publication as a letter in the Monthly Notices of the Royal Astronomical Society