Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods

Details Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284..394v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 284, Sept. 1, 1984, p. 394-406. Research supported by the Science Applicati

Statistics

Computation

14

Black Holes (Astronomy), Computational Astrophysics, Galactic Nuclei, Hydrodynamic Equations, Optical Thickness, Stellar Mass Accretion, Active Galaxies, Difference Equations, Euler Equations Of Motion, Luminosity, Radiative Transfer, Relativistic Effects

Scientific paper

Accretion onto a compact object is almost certainly the mechanism powering many of the observed powerful X-ray sources, and may also be the key to the luminosity from the nuclei of active galaxies and QSOs. Consideration is given to the equations for fully relativistic, optically thick, spherical, time-dependent accretion onto a black hole, as well as an approach to their numerical solution. Radiation energy transport is treated in the diffusion approximation, and magnetic dissipative heating is included. An implicit algorithm with a fixed Eulerian spatial mesh is presented, allowing accurate treatment of flow for which the time scales vary rapidly with radius. Examples of accretion flows which are optically thin at large radii, and which are optically thick everywhere, are given. These flow solutions were all found to quickly converge to steady state. With no magnetic dissipation, the net escaping luminosities are much less than the Eddington luminosity. With dissipation, however, net luminosities near the Eddington luminosity can be readily achieved.

Affiliated with

Also associated with

No associations

Rating

Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically thick, time-dependent spherical accretion onto a black hole. I - Equations and numerical methods will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1390408