言語種別 日本語 発行・発表の年月 2020/03 形態種別 学術雑誌 査読 査読あり 標題 Sub-millimeter detection of a Galactic center cool star IRS 7 by ALMA 執筆形態 共著 掲載誌名 Publications of the Astronomical Society of Japan 掲載区分 国内 担当範囲 データ解析，議論 著者・共著者 Masato Tsuboi, Yoshimi Kitamura, Takahiro Tsutsumi, Ryosuke Miyawaki, Makoto Miyoshi, Atsushi Miyazaki 概要 IRS 7 is an M red supergiant star which is located at 5′′.5 north of Sagittarius A∗⁠. We detected firstly the continuum emission at 340GHz of IRS 7 using the Atacama Large Millimeter/submillimeter Array (ALMA). The total flux density of IRS 7 is Sν=448±45μJy. The flux density indicates that IRS 7 has a photosphere radius of R=1170±60R⊙⁠, which is roughly consistent with the previous Very Large Telescope Interferometer measurement. We also detected a shell-like feature with a northern extension in the H30α recombination line using ALMA. researchmap用URL https://doi.org/10.1093/pasj/psaa013