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Accretion Discs around Black Holes

Published online by Cambridge University Press:  12 April 2016

Rainer Wehrse*
Affiliation:
Institut f. Theoretische Astrophysik, Universität Heidelberg, Tiergartenstr. 15, D–69121 Heidelberg, Germany

Abstract

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The structure of accretion discs around (super-)massive black holes is discussed in this contribution with special emphasis on the radiation fields. These are of crucial importance for the understanding of these objects since photons control in most cases not only the temperature distributions but also the pressures and shapes. Recent progress in the modelling of photon fields now provides the means for a much improved understanding of the consequences of the multidimensional structure of the discs as well as of the effects of the strong space time curvature and of the high velocities involved. However, the simultaneous inclusion of the NLTE level populations and of many spectral lines is still a major problem. It is also demonstrated that special and general relativity effects strongly distort the apparent brightness distributions and spectra such accretion discs so that a solution of the inverse problem will be very difficult.

Type
Part 4. Properties of Accretion Disks
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Baschek, B., Efimov, G.V., v. Waldenfels, W., Wehrse, R. 1996 A&Ain pressGoogle Scholar
Cunningham, C.T. 1975, ApJ 202, 788 Google Scholar
Frank, J., King, A., Raine, D. 1992, Accretion Power in Astrophysics, 2nd. ed., Cambridge Astrophys. Ser. 21 Google Scholar
Hafner, M., Wehrse, R. 1994, A&A 282, 874 Google Scholar
Kindl, C. 1994, diploma thesis, Heidelberg University Google Scholar
Laor, A., Netzer, H. 1989, MNRAS 238, 897 CrossRefGoogle Scholar
Marek, J.-A. 1996, private communicationGoogle Scholar
Mihalas, D., Weibel-Mihalas, B. 1984, Foundations of Radiation Hydrodynamics, Oxford Univ. Press Google Scholar
Papkalla, R. 1995, A&A 295, 551 Google Scholar
Quien, N., Wehrse, R., Kindl, C. 1995, Spektrum d. Wissenschaften, May 1995, p. 56 Google Scholar
Shaviv, G., Wehrse, R. 1991, A&A 251, 117 Google Scholar
Speith, R., Riffert, H., Ruder, H. 1995, Comp. Phys. Comm. 88, 109 Google Scholar
Störzer, H. 1993, A&A 271, 25 Google Scholar
Ulrich, M.-H. 1989, in: Theory of Accretion Disks, Meyer, F., et al., eds., Nato ASI Ser. C, vol 290, p. 3 CrossRefGoogle Scholar
Viergutz, S. 1993, A&A 272, 355 Google Scholar