The radial-azimuthal stability of accretion disks around black holes

Details The radial-azimuthal stability of accretion disks around black holes The radial-azimuthal stability of accretion disks around black holes

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..521m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 521-525.

Astronomy and Astrophysics

Astronomy

10

Accretion Disks, Black Holes (Astronomy), Flow Stability, Neutron Stars, Systems Stability, Thermal Instability, Kepler Laws, Navier-Stokes Equation, Wavelengths

Scientific paper

A radial-azimuthal stability analysis of thin accretion disk flow around a black hole or weakly magnetized neutron star is presented. Using the alpha disk formalism, it is shown that the viscous instability is present only for purely radial perturbations. Upon coupling radial and azimuthal perturbations, the thermal instability exhibits a retrograde rotation through the disk, the period for which is found to be six-sevenths the disk Keplerian period.

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