arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1609.08256astro-ph.GA
收藏

落向银河系中心的潮汐分裂分子云

Tidally-disrupted Molecular Clouds falling to the Galactic Center

Masato Tsuboi, Yoshimi Kitamura, Kenta Uehara, Ryosuke Miyawaki, Atsushi Miyazaki

摘要:

我们发现了一个分子云从外部区域连接到“银河系中心微型螺旋(GCMS)”,这是一束邻近Sgr A* 的电离气体流。分子云在CS J=2-1发射谱线上表现出明显的特征,并与GCMS连续相连。分子云的速度也与GCMS中H42 α复合线上观测到的电离气体的速度连续相关。形态学和运动学的关系表明,分子云是从外部区域下降到附近的Sgr A*,被中断的潮汐剪切的Sgr A* 和电离的紫外线发射的中央集群。在气态分子云与GCMS的交界处还发现了SiOJ =2-1的发射。在边界区似乎存在激波气体。

英文摘要:

We found a molecular cloud connecting from the outer region to the "Galactic Center Mini-spiral (GCMS)" which is a bundle of the ionized gas streams adjacent to Sgr A*. The molecular cloud has a filamentary appearance which is prominent in the CS J=2-1 emission line and is continuously connected with the GCMS. The velocity of the molecular cloud is also continuously connected with that of the ionized gas in the GCMS observed in the H42alpha recombination line. The morphological and kinematic relations suggest that the molecular cloud is falling from the outer region to the vicinity of Sgr A*, being disrupted by the tidal shear of Sgr A* and ionized by UV emission from the Central Cluster. We also found the SiO J=2-1 emission in the boundary area between the filamentary molecular cloud and the GCMS. There seems to exist shocked gas in the boundary area.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑