Comment on Viscous Stability of Relativistic Keplerian Accretion Disks

Details Comment on Viscous Stability of Relativistic Keplerian Accretion Disks Comment on Viscous Stability of Relativistic Keplerian Accretion Disks

1998-10-21

arxiv.org/abs/astro-ph/9810346v1

Astronomy and Astrophysics

Astrophysics

9 pages, 4 figures, uses aasms4.sty, submitted for ApJ Letters

Scientific paper

10.1086/311917

Recently Ghosh (1998) reported a new regime of instability in Keplerian accretion disks which is caused by relativistic effects. This instability appears in the gas pressure dominated region when all relativistic corrections to the disk structure equations are taken into account. We show that he uses the stability criterion in completely wrong way leading to inappropriate conclusions. We perform a standard stability analysis to show that no unstable region can be found when the relativistic disk is gas pressure dominated.

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