Stability of an isothermal magnetized accretion disk with causally limited viscosity and radial viscous force.

Details Stability of an isothermal magnetized accretion disk with causally limited viscosity and radial viscous force. Stability of an isothermal magnetized accretion disk with causally limited viscosity and radial viscous force.

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...303..635y&link_type=abstract

Astronomy and Astrophysics, v.303, p.635

Astronomy and Astrophysics

Astrophysics

3

Accretion Disks, Magnetohydrodynamics (Mhd), Instabilities, Galaxies: Active

Scientific paper

The stability of an isothermal, magnetized, radial viscosity and causally limited viscosity accretion disk is examined in this paper. We find that the viscous modes are always stable throughout the disk, and that the magneto-acoustic modes are pulsationally unstable. We also get some useful instability conditions. The numerical calculation results show that the Mach numbers do affect the instabilities of the disk. The radial viscosity damps the instability and the magnetic field enhances the instability of the radial oscillation. Our results are useful for understanding the time variations of AGN.

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