论文标题
以流出和径向粘度为主的圆盘的自相似结构
The self-similar structure of advection-dominated discs with outflow and radial viscosity
论文作者
论文摘要
观察性证据和理论论点假设流出可能在以对流为主的积聚盘（ADAF）中起重要作用。尽管方位角粘度是在这种情况下大多数先前研究的主要重点，但最近的研究表明，光盘结构也可能受径向粘度的影响。在这项工作中，我们结合了这些物理成分和磁场的环形成分，以探索它们在ADAF的稳态结构中的作用。因此，我们提出了一组相似性解决方案，其中流出有助于质量损失，角动量去除和能量提取。我们的溶液表明，径向粘度会导致盘以较慢的速率旋转，而径向气体速度则增加。对于强风，如果考虑径向粘度并且饱和传导参数足够高，则输入速度可能是开普勒速度的顺序。我们表明，磁场和风的强度会影响径向粘度的有效性。
Observational evidence and theoretical arguments postulate that outflows may play a significant role in the advection-dominated accretion discs (ADAFs). While the azimuthal viscosity is the main focus of most previous studies in this context, recent studies indicated that disc structure can also be affected by the radial viscosity. In this work, we incorporate these physical ingredients and the toroidal component of the magnetic field to explore their roles in the steady-state structure of ADAFs. We thereby present a set of similarity solutions where outflows contribute to the mass loss, angular momentum removal, and the energy extraction. Our solutions indicate that the radial viscosity causes the disc to rotate with a slower rate, whereas the radial gas velocity increases. For strong winds, the infall velocity may be of order the Keplerian speed if the radial viscosity is considered and the saturated conduction parameter is high enough. We show that the strength of magnetic field and of wind can affect the effectiveness of radial viscosity.
