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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >The formation of the young massive cluster B1 in the Antennae Galaxies (NGC 4038/NGC 4039) triggered by cloud-cloud collision
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The formation of the young massive cluster B1 in the Antennae Galaxies (NGC 4038/NGC 4039) triggered by cloud-cloud collision

机译：在云云碰撞中触发的天线星系（NGC 4038 / NGC 4039）中的年轻大型集群B1的形成

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摘要

The Antennae Galaxies, one of major mergers, are a starburst. Tsuge et al. (2020, PASJ, 73, S35) showed that the five giant molecular complexes in the Antennae Galaxies have signatures of cloud-cloud collisions based on the Atacama Large Millimeter Array (ALMA) archival data with 60 pc resolution. In the present work we analyzed the new CO data toward the super star cluster (SSC) B1 with 14 pc resolution obtained with ALMA, and confirm that two clouds show a complementary distribution with a displacement of similar to 70 pc as well as connecting bridge features between them. The complementary distribution shows a good correspondence with the theoretical collision model (Takahira et al. 2014, ApJ, 792, 63), and the distribution indicates that the formation of SSC B1 with similar to 10(6) M-circle dot was consistent with the trigger of cloud-cloud collision on a time scale of similar to 1 Myr, which is consistent with the cluster age. It is likely that SSC B1 was formed from molecular gas of similar to 10(7) M-circle dot with a star formation efficiency of similar to 10% in 1 Myr. We identify a few places where additional clusters are forming. Detailed gas motion indicates that the stellar feedback in the accelerating gas is not effective, while the ionization plays a role in evacuating the gas around the clusters at a similar to 20 pc radius. The results have revealed the details of the parent gas where a cluster having a mass similar to a globular is being formed.
机译：触角星系是主要的合并之一，是一次星暴。Tsuge等人（2020年，PASJ，73，S35）表明，触角星系中的五个巨分子复合体具有云云碰撞的特征，这些特征基于阿塔卡马大型毫米波阵列（ALMA）存档数据，分辨率为60 pc。在目前的工作中，我们用ALMA获得的分辨率为14 pc的超星团（SSC）B1的新CO数据进行了分析，并确认两个云显示出互补分布，位移类似于70 pc，以及它们之间的连接桥特征。互补分布与理论碰撞模型（Takahira et al.2014，ApJ，792，63）表现出良好的一致性，该分布表明，类似于10（6）M圆点的SSC B1的形成与类似于1 Myr的时间尺度上的云-云碰撞触发相一致，这与星团年龄一致。SSC B1很可能是由类似于10（7）M圆点的分子气体形成的，在1 Myr中的恒星形成效率类似于10%。我们确定了一些正在形成额外集群的地方。详细的气体运动表明，加速气体中的恒星反馈是无效的，而电离在疏散星团周围的气体时起到了作用，其半径类似于20pc。这些结果揭示了母气体的细节，其中形成了一个质量类似球状星团的星团。

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