The accretion of matter by a collapsing star in the presence of a magnetic field. II - Selfconsistent stationary picture

Details The accretion of matter by a collapsing star in the presence of a magnetic field. II - Selfconsistent stationary picture The accretion of matter by a collapsing star in the presence of a magnetic field. II - Selfconsistent stationary picture

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..42..401b&link_type=abstract

Astrophysics and Space Science, vol. 42, July 1976, p. 401-424.

Computer Science

Numerical Analysis

107

Black Holes (Astronomy), Emission Spectra, Gravitational Collapse, Magnetohydrodynamics, Shock Waves, Stellar Gravitation, Bernoulli Theorem, Center Of Gravity, Deposition, Hydrodynamic Equations, Kinetic Energy, Lines Of Force, Numerical Analysis, Pressure Gradients

Scientific paper

A two-dimensional magnetohydrodynamic analysis of the accretion of matter onto a black hole is given on the assumption of no effect of the object's magnetic field on the infall of matter. Around the star, in the plane perpendicular to the direction of the magnetic field, a dense quasi-stationary disk is formed, the structure of which is to a large extent determined by dissipative processes. The structure of the disk and the spectrum of the emitted radiation are calculated for a laminar disk with Coulomb dissipation mechanism and for a turbulent disk. The emission caused by shock wave formation at a laminar disk is similar to the emission during the accretion of matter with disordered magnetic field. The turbulent disk emits a considerable part of its flux in the infrared, so it is possible that infrared jets in the spectra of nuclei of some galaxies could in some manner be connected with collapsing objects characterized by a turbulent disk structure.

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