Secular instability in quasi-viscous disk accretion

被引：10
|
作者：
Bhattacharjee, Jayanta K. [1 ]
Ray, Arnab K.
机构：
[1] Indian Assoc Cultivat Sci, Dept Theoret Phys, Kolkata 700032, W Bengal, India
[2] Inter Univ Ctr Astron & Astrophys, Pune 411007, Maharashtra, India
来源：
ASTROPHYSICAL JOURNAL | 2007年 / 668卷 / 01期
关键词：
accretion; accretion disks; hydrodynamics; instabilities; methods : analytical;
D O I：
10.1086/521042
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A first-order correction in the alpha-viscosity parameter of Shakura & Sunyaev has been introduced in the standard inviscid and thin accretion disk. A linearized time-dependent perturbative study of the stationary solutions of this "quasi-viscous'' disk reveals the development of a secular instability on large spatial scales. This qualitative feature is equally manifest for two different types of perturbative treatment: a standing wave on subsonic scales, as well as a radially propagating wave. The stability of the flow is restored when the viscosity disappears.
引用
收藏
页码：409 / 416
页数：8
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