Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..203m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, March 15, 1992, p. 203-209.
Astronomy and Astrophysics
Astronomy
3
Absorption Spectra, Accretion Disks, Black Holes (Astronomy), Plasma Turbulence, Radiation Pressure, Synchrotron Radiation, Absorption Cross Sections, Interstellar Magnetic Fields
Scientific paper
The steadiness of a turbulent spherical flow with magnetic dissipation is assessed by a semianalytical criterion based on a comparison between the radiative pressure due to synchrotron absorption on the accreting material and gravity. The dynamical effects of the radiation pressure due to cyclo-synchrotron absorption on the infalling gas are investigated. The large cross section for synchrotron absorption processes produces a radiation pressure that might balance and even overcome the gravitational attraction. A semianalytical criterion is discussed for the existence of an unsteady flow for accretion models with M typical of a stellar black hole and a black hole in a galactic nucleus.
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