论文标题
通过碰撞流量的年轻大型集群形成
The formation of young massive clusters by colliding flows
论文作者
论文摘要
年轻的大型集群（YMC）是星系中恒星形成最强烈的区域。为了制定YMC组的模型，而同时满足观察结果的约束是高度挑战的。我们表明，形成YMC需要具有密度$ \ gtrsim $ 100 cm $^{ - 3} $的云才与高速碰撞（$ \ gtrsim $ 20 km S $^{ - 1} $）。我们提出了第一个模拟，该模拟从$ \ sim100 $ cm $^{ - 3} $开始的中等云密度开始，能够在大约1 Myr的一个时间段内将大量质量转换为恒星，以产生与观察到的相似的密集质量。在更极端的环境中，这种情况很常见，在更极端的环境中，YMC很常见，但对于我们的Galaxy而言，YMC很少见。
Young massive clusters (YMCs) are the most intense regions of star formation in galaxies. Formulating a model for YMC formation whilst at the same time meeting the constraints from observations is highly challenging however. We show that forming YMCs requires clouds with densities $\gtrsim$ 100 cm$^{-3}$ to collide with high velocities ($\gtrsim$ 20 km s$^{-1}$). We present the first simulations which, starting from moderate cloud densities of $\sim100$ cm$^{-3}$, are able to convert a large amount of mass into stars over a time period of around 1 Myr, to produce dense massive clusters similar to those observed. Such conditions are commonplace in more extreme environments, where YMCs are common, but atypical for our Galaxy, where YMCs are rare.
