Accretion disk thermal instability in galactic nuclei

Details Accretion disk thermal instability in galactic nuclei Accretion disk thermal instability in galactic nuclei

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351...47m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 1, 1990, p. 47-61.

Statistics

Computation

69

Accretion Disks, Active Galactic Nuclei, Black Holes (Astronomy), Thermal Stability, Astronomical Models, Computational Astrophysics, Spatial Distribution, Thermodynamic Equilibrium

Scientific paper

The nonlinear evolution and spatial propagation of the thermal instability in accretion disks in galactic nuclei are investigated. Integrations of the vertical structure of the disks are described for different alpha prescriptions, and the thermal stability is examined. Global time-dependent calculations of the unstable disks are performed which show that there are two distinct types of behavior according to the assumed prescription for the viscosity parameter: the 'purr' type and the 'roar' type. The roar type is analyzed in some detail.

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