[DBS2003]179 is a super star cluster in the Galaxy discovered by 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 which are likely associated with the cluster. The association is evidenced by the spatial correlation with the 8 micron Spitzer image, and a high ratio of the two transitions of 12CO (J=3-2 to J=1-0). The two clouds show complementary distribution in space and bridge features connecting them in velocity. We frame a hypothesis that the two clouds collided with each other 1-2 Myr ago, and the collision compressed the interface layer, triggering the formation of the cluster. This offers an additional piece of evidence for a super star cluster formed by cloud--cloud collision alongside of the four super star clusters including Wd2, NGC3603, RCW38 and R136. The findings indicate that the known super star clusters having closely associated dust emission are formed by cloud-cloud collision, lending support for the important role of cloud--cloud collision in high-mass star formation.

中文翻译：

---

[DBS2003]179 中由云-云碰撞引起的星团形成

[DBS2003]179 是通过深近红外观测发现的银河系中的一个超级星团。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团相关的分子云。与 8 微米斯皮策图像的空间相关性以及 12CO 的两个跃迁（J=3-2 到 J=1-0）的高比率证明了这种关联。两朵云在空间上显示出互补的分布，并且在速度上将它们连接起来的桥梁特征。我们提出了一个假设，即两朵云在 1-2 Myr 之前相互碰撞，碰撞压缩了界面层，触发了星团的形成。这为由云-云与 Wd2、NGC3603、RCW38 和 R136 四个超级星团碰撞形成的超级星团提供了额外的证据。研究结果表明，已知的与尘埃发射密切相关的超级星团是由云-云碰撞形成的，这为云-云碰撞在大质量恒星形成中的重要作用提供了支持。