言語種別 英語 発行・発表の年月 2003 形態種別 その他論文 標題 Hot Cores in W49N   Hot Cores in W49N 執筆形態 共著 掲載誌名 Star Formation at High Angular Resolution, International Astronomical Union. Symposium no. 221 出版社・発行元 IAU 巻・号・頁 pp.221-222 著者・共著者 Miyawaki Ryosuke, Hasegawa Tesuo, Hayashi Masahiko   Miyawaki Ryosuke, Hasegawa Tesuo, Hayashi Masahiko 概要 The giant molecular cloud associated with W49A is one of most active massive star forming regions. W49N in W49A has a active masers and cluster of UCHIIs. We present 1-2"" resolution maps made with the Rainbow which is an array combained the 45-m Telescope into the Nobeyama Millimeter Array at 3.4mm wavelength in the continuum and SO line toward W49N. SO emission shows very effective feature of high abundance and excitation such as Orion KL ""hot core"". Distribution of SO hot cores of W49N is also adjacent to UCHIIs. Some of them are coincide with CH3CN (Wilner et al. 2000). These hot cores are heated by embedded or nearby massive stars. Some hot cores are in early stage before massive stars ionize thier surrroundings. Cluster of massive stars is forming in W49N