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Astron. Astrophys. 327, 57-60 (1997)

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Analytical calculations of the radial structure of self-gravitating and magnetized accretion disks in AGN

Ye Lu , Lantian Yang and Shaoping Wu

Physics Department and Institute of Astrophysics, Huazhong Normal University, Wuhan, 430070, P.R. China

Received 25 July 1996 / Accepted 18 June 1997


The variation with radius of the physical parameters(scale height, central temperature, and central density) of a self-gravitation and magnetized accretion disk is examined.We have adopted the different opacities in different regions as in the work by Collin-Souffrin and Dumont(1990II), and we consider a disc model with a [FORMULA] black hole at the center and with an accretion rate of 0.01 [FORMULA] /yr. Most of our results are very similar to theirs, but there are some differences between ours and theirs, that is: the critical radius where X-rays are able to heat significantly the disc is not sensitive to self-gravitation. However, self-gravitation has an influence on the location of the radius which emits the bulk of UV radiation, and the magnetic field affects both of them.

Key words: accretion disks – galaxies: active – galaxies: nuclei


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© European Southern Observatory (ESO) 1997

Online publication: April 8, 1998