Flicker noise in accretion discs

被引：492
|
作者：
Lyubarskii, YE
机构：
[1] Inst Radio Astron, UA-310002 Kharkov, Ukraine
[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1997年 / 292卷 / 03期
关键词：
accretion; accretion discs; X-rays : general;
D O I：
10.1093/mnras/292.3.679
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An accretion disc with an alpha parameter fluctuating at different radii is considered. The relation between the alpha fluctuations and the resulting fluctuations of the accretion rate near the accreting body is obtained. Fluctuations of the accretion rate and, consequently, of the luminosity proved to be of the flicker-noise type provided that the characteristic time-scale of the alpha fluctuations is of the order of the local viscous time-scale, and that the fluctuations at different radial scales are uncorrelated.
引用
收藏
页码：679 / 685
页数：7
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