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On The Evolution of Accretion Disks in Galactic Centers

Published online by Cambridge University Press:  23 September 2016

Wolfgang J. Duschl
Wolfgang J. Duschl*
Affiliation:
Institut für Theoretische Astrophysik, Universität Heidelberg, Im Neuenheimer Feld 561, D-6900 Heidelberg 1, West Germany

Abstract

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I present the results of hydrodynamical model calculations for the evolution of accretion disks in an originally soft potential well. We follow the onset of selfgravity in the accretion disk and the formation of a central object, and find that for an ample set of possible parameter combinations of the “host galaxy” the evolution runs such that today, i.e. after an evolution time of the order of 1010yrs, compact objects of about 106 M⊙ have formed in the centers of galaxies. In the first Section, I concisely describe the basic ideas; Sect. 2 is devoted to the presentation of the results of hydrodynamical model calculations; and in the last Section, I shall discuss these results, interpreting them with the help of an analytical model that shows why the evolving central object is so independent of the conditions in the galaxy.

Type
The Large - Scale Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 167 - 170
Copyright
Copyright © Kluwer 1989 

References

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