Time-dependent, optically thick accretion onto a black hole

Details Time-dependent, optically thick accretion onto a black hole Time-dependent, optically thick accretion onto a black hole

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239..705g&link_type=abstract

Astrophysical Journal, Part 1, vol. 239, July 15, 1980, p. 705-711. NBS-supported research;

Astronomy and Astrophysics

Astronomy

14

Black Holes (Astronomy), Hydrodynamics, Magnetic Field Reconnection, Stellar Mass Accretion, Angular Momentum, Diffuse Radiation, Optical Thickness, Radiative Transfer, Relativity, Time Dependence

Scientific paper

A fully relativistic hydrodynamics code which incorporates diffusive radiation transport is used to study time-dependent, spherically symmetric, optically thick accretion onto a black hole. It is found that matter free-falls into the hole regardless of whether the diffusion time scale is longer or shorter than the dynamical time. Nonadiabatic heating due to magnetic field reconnection is included. The internal energy thus generated affects the flow in a purely relativistic way, again ensuring free-fall collapse of the inflowing matter. Any matter enveloping a black hole will thus be swallowed on a dynamical time scale with relatively small net release of energy. The inclusion of angular momentum will not necessarily affect this conclusion.

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