Generalized thermal instability criterion of black hole accretion disks
Wu XB(吴学兵)
Source PublicationChinese Physics Letters
AbstractThe conventional thermal instability criterion cannot be applied to the advection-dominated accretion disks around black holes where the radiative cooling is insufficient to balance the viscous heating. The surface density change associated with the temperature perturbations, which was usually neglected in deriving the conventional criterion, was recently shown to be much significant in the advection-dominated disks. Considering both advection and surface density change, a generalized thermal instability criterion is suggested. By applying it to the optically thin and optically thick advection-dominated disks, it is found that the former one is thermally stable and the latter one is thermally unstable against short wavelength perturbations, which agrees well to those found recently by both analytic and quantitative stability analyses.
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wu XB. Generalized thermal instability criterion of black hole accretion disks[J]. Chinese Physics Letters,1998,15(7):542.
APA 吴学兵.(1998).Generalized thermal instability criterion of black hole accretion disks.Chinese Physics Letters,15(7),542.
MLA 吴学兵."Generalized thermal instability criterion of black hole accretion disks".Chinese Physics Letters 15.7(1998):542.
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