A study on the oscillatory instability of a hot two-temperature accretion disc including advection.

Details A study on the oscillatory instability of a hot two-temperature accretion disc including advection. A study on the oscillatory instability of a hot two-temperature accretion disc including advection.

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acaps..19..369d&link_type=abstract

Acta Astrophys. Sin., Vol. 19, No. 4, p. 369 - 374

Astronomy and Astrophysics

Astrophysics

Accretion Disks: Instabilities

Scientific paper

The radial-azimuthal instability of a hot two-temperature accretion disc with advection is analyzed. After obtaining the dispersion equation, the authors find that advection and viscous force have an influence on the stability of acoustic modes, but not on the stability of thermal and viscous modes. They also find azimuthal perturbations to affect the stability of all the modes. This model may be useful in explaining the quasi-periodic or periodic luminosity variations in various astronomical objects.

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