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THE RADIAL-AZIMUTHAL INSTABILITY OF ACCRETION DISKS .2. GAS-PRESSURE DOMINATION

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成果类型:
期刊论文
作者:
WU, XB*;LI, QB;ZHAO, YH;YANG, LT
通讯作者:
WU, XB
作者机构:
[YANG, LT; WU, XB; LI, QB; ZHAO, YH] HUAZHONG NORMAL UNIV,INST ASTROPHYS,WUHAN 430070,PEOPLES R CHINA.
[WU, XB] CHINESE ACAD SCI,BEIJING ASTRON OBSERV,BEIJING 100080,PEOPLES R CHINA.
通讯机构:
[WU, XB] C
CHINESE ACAD SCI,BEIJING ASTRON OBSERV,BEIJING 100080,PEOPLES R CHINA.
语种:
英文
关键词:
Accretion, accretion disks;Hydrodynamics;Instabilities
期刊:
Astrophysical Journal
ISSN:
0004-637X
年:
1995
卷:
442
期:
2
页码:
743-748
机构署名:
本校为第一机构
院系归属:
物理科学与技术学院
摘要:
A radial-azimuthal stability analysis of a geometrically thin, gas-pressure-dominated accretion disk is presented. In the purely radial perturbation case, the disk is pulsationally unstable to the acoustic modes but stable to the thermal and viscous modes. If the coupling of radial and azimuthal perturbations is considered, the stability properties of the disk are different. With the increase of azimuthal wavenumber, the acoustic modes tend to become stable while the viscous mode becomes unstable. The acoustic instability exists only for large viscosity and small azimuthal wavenumber, while th...

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