A viscosity prescription for a self-gravitating accretion disc⋆

Authors: D. N. C. Lin, J. E. Pringle - Monthly Notices of the Royal Astronomical Society 1987 cited by 332

We propose a prescription for treating the transfer of angular momentum within a gaseous differentially rotating disc subject to gravitational instability in terms of an effective kinematic viscosity. We show that under certain conditions this prescription allows a similarity solution and that all solutions tend towards this at large times.