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AGN Accretion Disks with Finite Turbulent Prandtl Number

Published online by Cambridge University Press:  19 July 2016

O. M. Heinrich
O. M. Heinrich*
Affiliation:
Institut für Theoretische Astrophysik, INF 561, Heidelberg D-69120, Germany

Extract

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The present paper reports results of a study of turbulent energy transport in AGN accretion disks. We follow the spirit of the papers by Shakura et al. and Rüdiger et. al in which the concept of an eddy heat conductivity was introduced and developed. For the viscosity we use a standard α− description with the main component of the stress tensor trø proportional to the gas pressure. The dimensionless Prandtl number Pr given as the ratio of turbulent kinematic viscosity and turbulent heat conductivity enters the model as a free parameter. The disk structure depends sensitively on material properties such as opacities and specific heats. In our calculations we have used an equation of state and mean opacities taking into account a list of the most important ionization processes as well as the radiation contributions to thermodynamic quantities.

Type
Poster Contributions: Disks Structure and Emission
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 482
Copyright
Copyright © Kluwer 1994 

References

Shakura, N.I., Sunyaev, R.A. and Zilitinkevich, S.S.: 1978, Astron. Astrophys. vol. 62, pp. 179–187 Google Scholar
Rüdiger, G., Elstner, D. and Tschäpe, R.: 1988, Acta Astron. vol. 38, pp. 299–314 Google Scholar