Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984xue..conf..206b&link_type=abstract
In Max-Planck Inst. für Physik und Astrophysik X-Ray and UV Emission from Active Galactic Nuclei p 206-210 (SEE N85-17790 08-88)
Astronomy and Astrophysics
Astrophysics
Accretion Disks, Active Galactic Nuclei, Astronomical Models, Dynamo Theory, Interstellar Magnetic Fields, Cosmic X Rays, Equations Of State, Gas Pressure, Radiation Pressure, Stress Tensors
Scientific paper
A model of a nonkeplerian accretion disk in which the stress tensor is expressed in terms of the large scale components of a dynamo magnetic field and in which X-ray emission is due to magnetic energy dissipation through a coronal mechanism is presented. It is shown that the Maxwell stress in the equation of state is relevant in comparison to radiation and gas pressures, suggesting a basic role of the magnetic field in determining structure, dynamics, and energetics of accretion disks. The analytical solutions depend on the mass of the compact object, the accretion rate, the geometric dimensions, and the angular momentum per unit mass at the outer disk boundary.
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