Statistics – Computation
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.215..667b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 215, Aug. 15, 1985, p. 667-683. Research supported by t
Statistics
Computation
21
Computational Astrophysics, Galactic Nuclei, Galactic Radiation, Relativistic Velocity, Toruses, Active Galactic Nuclei, Angular Momentum, Black Holes (Astronomy), Dynamic Stability, Heat Transfer, Thermal Conductivity, Viscosity
Scientific paper
Equations describing the general relativistic evolution of hypothetical radiation-suported tori in active galactic nuclei are presented and discussed. Equations describing global, nonaxisymmetric perturbations of radiation tori are also given. The role of instabilities in transporting angular momentum and heat is examined and some simple prescriptions for use in numerical calculation of the secular evolution of these structures are suggested. In particular, if a sufficiently optically thick torus evolves to become dynamically unstable then a gyrotropic, marginally stable convection zone with angular momentum constant on isentropes may be established. Goldreich-Schubert-Fricke instability should be adequate to maintain a radiative zone in a barotropic state.
Blandford Roger. D.
Jaroszynski Michal
Kumar Sanjeev
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