A viscosity prescription for a self-gravitating accretion disc⋆
A viscosity prescription for a self-gravitating accretion disc⋆
复制标题
自引力吸积盘的粘度处方⋆
DOI：
--
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
J. Pringle
中科院分区：
文献类型：
--
作者：
D. Lin;J. Pringle
用有效运动粘性讨论了受引力不稳定影响的气态差动圆盘内角动量传递的模型。假设即使当圆盘中的物质受到自引力作用时，这种不稳定性也不一定直接导致圆盘的部分凝结成自引力物体。讨论了模型允许相似解的条件，结果表明，一般解在较大的时间内趋于相似解。
A model for treating the transfer of angular momentum within a gaseous differentially rotating disc subject to gravitational instability is discussed in terms of an effective kinematic viscosity. It is assumed that even when matter in the disc is subject to self-gravitation, the instability does not necessarily lead directly to condensation of parts of the disc into self-gravitating bodies. Conditions under which the present model permits a similarity solution are discussed, and it is shown that the general solution tends to the similarity solution at large times.