Self-gravitational collapse of polytropic mass-losing gaseous discs:   effects of outer boundary condition dictated by parent cloud
  Given the fact that accretion discs are associated with their parent molecular cloud, we studied its effects as a constraint on the outer boundary of the viscous-resistive polytropic self-gravitating accretion flows subject to the mass and angular momentum loss. 
Erfan Nourbakhsh, Mohsen Shadmehri, Shahram Abbassi
astro-ph.SR