论文标题
围绕年轻恒星物体的磁盘的形成和演变
Formation and Evolution of Disks around Young Stellar Objects
论文作者
论文摘要
最近的观察结果表明，与年轻的恒星物体可能形成不同的磁盘。尽管与椎间盘的形成可能是亲切云中角动量保存的自然结果，但理论研究表明，由于有效的磁制动，从磁性磁性磁性磁性磁性磁性磁性磁性却很困难，这是由于有效的磁制动，该磁制动的有效的磁制动会使远离室内动量的大部分远距离远离环形区域。我们回顾了低质量和高质量周围年轻恒星物体周围磁盘的形成和早期演变的最新进展，并着重于可能弥合观察与理论之间差距的机制，包括非理想的MHD效应和折叠核心中的非对称扰动（例如，磁场错误和磁场错位和涡流）。我们还讨论了流出启动的相关过程和多个系统的形成，并讨论了原行星磁盘属性的可能影响。
Recent observations have suggested that circumstellar disks may commonly form around young stellar objects. Although the formation of circumstellar disks can be a natural result of the conservation of angular momentum in the parent cloud, theoretical studies instead show disk formation to be difficult from dense molecular cores magnetized to a realistic level, owing to efficient magnetic braking that transports a large fraction of the angular momentum away from the circumstellar region. We review recent progress in the formation and early evolution of disks around young stellar objects of both low-mass and high-mass, with an emphasis on mechanisms that may bridge the gap between observation and theory, including non-ideal MHD effects and asymmetric perturbations in the collapsing core (e.g., magnetic field misalignment and turbulence). We also address the associated processes of outflow launching and the formation of multiple systems, and discuss possible implications in properties of protoplanetary disks.
