低质量和高质量恒星形成的比较
Comparison of Low-Mass and High-Mass Star Formation
摘要：
我回顾了恒星形成的理论模型，以及它们如何应用于恒星质谱。对于大质量恒星的形成，有几种不同的理论正在积极研究中，特别是湍流核心吸积，竞争吸积和原恒星合并，导致不同的观测预测。这些包括初始条件的类型，入口包层的结构，盘和外流，以及大质量恒星形成与恒星团簇形成的关系。即使对于核心吸积模型，也有几个主要的不确定性与崩溃的时间尺度有关，防止大规模核心碎片化的不同过程的相对重要性，以及磁盘和流出的性质。最后，我讨论了一些最近的观测结果，有助于提高我们对这些过程的理解。
英文摘要：
I review theoretical models of star formation and how they apply across the stellar mass spectrum. Several distinct theories are under active study for massive star formation, especially Turbulent Core Accretion, Competitive Accretion and Protostellar Mergers, leading to distinct observational predictions. These include the types of initial conditions, the structure of infall envelopes, disks and outflows, and the relation of massive star formation to star cluster formation. Even for Core Accretion models, there are several major uncertainties related to the timescale of collapse, the relative importance of different processes for preventing fragmentation in massive cores, and the nature of disks and outflows. I end by discussing some recent observational results that are helping to improve our understanding of these processes.
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