低质量恒星形成模拟的最新进展
Recent Developments in Simulations of Low-mass Star Formation
摘要：
在恒星形成区，我们可以观察到不同演化阶段的各种物体和现象，如分子云、原恒星喷流和外流、星周盘和原恒星。然而，直接观察恒星形成过程本身是困难的，因为它被致密的下降包层所掩盖。数值模拟可以揭示坍缩气体云中的恒星形成过程。最近，一些研究表明原恒星是从星前核心阶段形成的，在这个阶段，分子云和原恒星都有足够的空间分辨率。这些模拟显示了碎裂和双星的形成，外流和喷流驱动，以及坍缩气体云中的星周盘的形成。此外，还研究了恒星形成过程中磁场的角动量转移和耗散过程。在本文中，我简要回顾了最近的发展，在低质量恒星形成的数值模拟。
英文摘要：
In star forming regions, we can observe different evolutionary stages of various objects and phenomena such as molecular clouds, protostellar jets and outflows, circumstellar disks, and protostars. However, it is difficult to directly observe the star formation process itself, because it is veiled by the dense infalling envelope. Numerical simulations can unveil the star formation process in the collapsing gas cloud. Recently, some studies showed protostar formation from the prestellar core stage, in which both molecular clouds and protostars are resolved with sufficient spatial resolution. These simulations showed fragmentation and binary formation, outflow and jet driving, and circumstellar disk formation in the collapsing gas clouds. In addition, the angular momentum transfer and dissipation process of the magnetic field in the star formation process were investigated. In this paper, I briefly review recent developments in numerical simulations of low-mass star formation.
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