On the Maximal Value of the Turbulent alpha-Parameter in Accretion Discs
High Energy Astrophysical Phenomena
2015-05-13 v1
Abstract
In this short paper we show that making turbulence two- rather than three-dimensional may increase effective turbulent viscosity by about 40%. Dimensionless hydrodynamical viscosity parameter up to \alpha\_{max} = 0.25 M_t^2 may be obtained in this approach, that is in better agreement with the observational data on non-stationary accretion than the values obtained in numerical simulations. However, the \alpha-parameter values known from observations are still several times higher.
Keywords
Cite
@article{arxiv.0905.3656,
title = {On the Maximal Value of the Turbulent alpha-Parameter in Accretion Discs},
author = {P. Abolmasov and N. I. Shakura},
journal= {arXiv preprint arXiv:0905.3656},
year = {2015}
}
Comments
4 pages, accepted to Astronomische Nachrichten