Hostname: page-component-6bf8c574d5-685pp Total loading time: 0 Render date: 2025-03-07T02:27:06.947Z Has data issue: false hasContentIssue false
  • English
  • Français

The Rise and Fall of α-Model Viscosity

Published online by Cambridge University Press:  12 April 2016

F. V. Hessman  and
C. Obach
F. V. Hessman
Affiliation:
Universitäts-Sternwarte Göttingen, Germany
C. Obach
Affiliation:
Universitäts-Sternwarte Göttingen, Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

For nearly two decades, our only useful model for the viscosity in accretion disks has been the so-called ‘α-model’. However, it has become clear that the simplest models –in which α is constant – are inadequate to explain the range of behaviours seen in real disks. We show that the properties of steady-state, vertically-averaged models can be determined without any assumptions other than that the disks obey the classical Navier-Stokes equation. These solutions have derived values of α which vary with radius by many orders of magnitude even in small CV disks.

Type
Accretion Discs
Information
International Astronomical Union Colloquium , Volume 158: Cataclysmic Variables and Related Objects , 1996 , pp. 111 - 114
Copyright
Copyright © Kluwer 1996

References

Cannizzo, J.K., 1993, in “Accretion Disks in Compact Stellar Systems”, ed. Wheeler, J.C. (World Scientific), p 6 Google Scholar
Duschl, W.J., 1986, A&A, 163, 56 Google Scholar
Glatzel, W., 1992, MNRAS, 257, 572 CrossRefGoogle Scholar
Hoshi, R., 1979, Progr. Theor. Phys., 61, 1307 CrossRefGoogle Scholar
Meyer, F., 1990, Rev. Mod. Astron., 3, 1 Google Scholar
Shakura, N.I., Sunyaev, R.A., 1973, A&A, 24, 337 Google Scholar
Tout, C.A., 1996, these proceedings, p 97CrossRefGoogle Scholar