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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Cluster formation induced by a cloud-cloud collision in [DBS2003]179
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Cluster formation induced by a cloud-cloud collision in [DBS2003]179

机译：云云碰撞引起的群集形成179

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[DBS2003]179 is a super star cluster in the Galaxy discovered in deep near-infrared observations. We carried out CO J = 1-0 and J = 3-2 observations of the region of [DBS2003]179 with NANTEN2, ASTE, and the Mopra 22m telescope. We identified and mapped two molecular clouds that are likely to be associated with the cluster. This association is supported by the spatial correlation with the corresponding 8 mu m Spitzer image and by a high ratio of the two transitions of (CO)-C-12(J = 3-2 and J = 1-0). The two clouds show complementary distributions in space, and bridging features connect them in velocity. We hypothesize that the two clouds collided with each other 1-2Myr ago and that the collision compressed the interfacial layer, triggering the formation of the cluster. This offers an additional piece of evidence for a super star cluster formed by a cloud-cloud collision, alongside the four super star clusters Westerlund, NGC 3603, RCW 38, and R 136. These findings indicate that the known super star clusters with closely associated dust emission were formed by cloud-cloud collisions, lending support to the important role of cloud-cloud collisions in high-mass star formation.
机译：[DBS2003]179是在星系中通过深近红外观测发现的一个超级星团。我们使用NANTEN2、ASTE和Mopra 22m望远镜对[DBS2003]179区域进行了CO J=1-0和J=3-2观测。我们确定并绘制了两个可能与该星系团有关的分子云。与相应的8μm Spitzer图像的空间相关性以及（CO）-C-12（J=3-2和J=1-0）的两个跃迁的高比率支持了这种关联。这两朵云在空间上呈现互补分布，而桥接特征在速度上将它们连接起来。我们假设两个云团在1-2年前相互碰撞，碰撞压缩了界面层，触发了星团的形成。这为云-云碰撞形成的超级星团以及四个超级星团Westerlund、NGC 3603、RCW 38和R 136提供了额外的证据。这些发现表明，已知的与尘埃排放密切相关的超级星团是由云云碰撞形成的，支持了云云碰撞在高质量恒星形成中的重要作用。

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