论文标题
通过碰撞hi流触发的小麦芽云中开放群集NGC 602的形成
The formation of the open cluster NGC 602 in the Small Magellanic Cloud triggered by colliding HI flows
论文作者
论文摘要
NGC 602是小型麦哲伦云中出色的年轻开放集群。 We have analyzed the new HI data taken with the Galactic Australian Square Kilometre Array Pathfinder survey project at an angular resolution of 30". The results show that there are three velocity components in the NGC 602 region. We found that two of them having ~20 km s$^{-1}$ velocity separation show complementary spatial distribution with a displacement of 147 pc. We present a scenario that the two clouds collided互相触发NGC 602和11个恒星的形成。 Bekki 2007）与RMC136和LHA 120-N 44区域一起为Galaxy相互作用提供了支持，在形成高质量恒星和簇中发挥了作用。
NGC 602 is an outstanding young open cluster in the Small Magellanic Cloud. We have analyzed the new HI data taken with the Galactic Australian Square Kilometre Array Pathfinder survey project at an angular resolution of 30". The results show that there are three velocity components in the NGC 602 region. We found that two of them having ~20 km s$^{-1}$ velocity separation show complementary spatial distribution with a displacement of 147 pc. We present a scenario that the two clouds collided with each other and triggered the formation of NGC 602 and eleven O stars. The average time scale of the collision is estimated to be ~8 Myr, while the collision may have continued over a few Myr. The red shifted HI cloud extending ~500 pc flows possibly to the Magellanic Bridge, which was driven by the close encounter with the Large Magellanic Cloud 200 Myr ago (Fujimoto & Noguchi 1990; Muller & Bekki 2007). Along with the RMC136 and LHA 120-N 44 regions the present results lend support for that the galaxy interaction played a role in forming high-mass stars and clusters.
