言語種別 日本語 発行・発表の年月 2017/01 形態種別 その他論文 査読 査読あり 標題 Tidally-disrupted Molecular Clouds falling to the Galactic Center 執筆形態 共著 掲載誌名 The Multi-Messenger Astrophysics of the Galactic Centre, Proceedings of the International Astronomical Union, IAU Symposium 掲載区分 国外 巻・号・頁 322,115-118頁 著者・共著者 Tsuboi, Masato; Kitamura, Yoshimi; Uehara, Kenta; Miyawaki, Ryosuke; Miyazaki, Atsushi 概要 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 H42α 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.