期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 357, 期 1, 页码 L31-L34出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2005.00011.x
关键词
accretion, accretion discs; black hole physics; hydrodynamics; stars : neutron; X-rays : binaries
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.
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