|Hydrodynamics of Outer Parts of Viscous Decretion Disks of Critically
|464, Circumstellar Dynamics at High Resolution
|Kurfürst, P.; Krtička, J.
|Direct centrifugal ejection of matter from a near-critically rotating
equatorial surface of hot stars leads to the outflowing viscous decretion disk
formation. The mass and angular momentum loss via such disks can significantly
influence the evolution of rapidly rotating stars. The viscosity plays a key
role in the outward angular momentum transport as well as in the disk thermal
energy generation. We study the dynamics of the outer parts of outflowing
viscous disks, which is important for the stellar angular momentum loss. We
conclude that the outer disk structure is determined by the spatial variations
of the disk temperature and alpha viscosity parameter.