Oscillations of thick accretion discs around black holes

被引：24
|
作者：
Rubio-Herrera, E [1 ]
Lee, WH [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2005年 / 357卷 / 01期
关键词：
accretion; accretion discs; black hole physics; hydrodynamics; stars : neutron; X-rays : binaries;
D O I：
10.1111/j.1745-3933.2005.00011.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：L31 / L34
页数：4
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