Low compressibility accretion disc formation in close binaries: the role of physical viscosity

摘要

Aims. Physical viscosity naturally hampers gas dynamics ( rarefaction or compression). Such a role should support accretion disc development inside the primary gravitation potential well in a close binary system, even for low compressibility modelling. Therefore, from the astrophysical point of view, highly viscous accretion discs could exist even in the low compressibility regime showing strong thermal differences to high compressibility ones