Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991acasn..32..154y&link_type=abstract
(Acta Astronomica Sinica, vol. 32, no. 2, 1991, p. 154-164) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 15, Dec. 1
Astronomy and Astrophysics
Astrophysics
Accretion Disks, Active Galactic Nuclei, Interstellar Magnetic Fields, Magnetohydrodynamic Flow, Angular Momentum, Momentum Transfer, Stellar Coronas
Scientific paper
By taking magnetic stress in place of viscosity as the mechanism for angular momentum transfer, the effect of frozen magnetic field on the structure of a geometrically thin accretion disk is examined. It is shown that the disk is quasi-Keplerian and its total luminosity is twice the luminosity in the standard disk model. In the inner region, there exists a narrow cool region, and the highly collimated jet is formed under the action of the azimuthal component of the magnetic field. The model can explain the major AGN properties, such as the radiation variation and the 'bumps' in the optical, ultraviolet, and soft X-ray ranges.
Wu Xue-Bin
Yang Lan-Tian
Yang P.-B.
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