Tomofumi Umemoto, Tetsuhiro Minamidani, Nario Kuno, Shinji Fujita, Mitsuhiro Matsuo, Atsushi Nishimura, Kazufumi Torii, Tomoka Tosaki, Mikito Kohno, Mika Kuriki, Yuya Tsuda, Akihiko Hirota, Satoshi Ohashi, Mitsuyoshi Yamagishi, Toshihiro Handa, Hiroyuki Nakanishi, Toshihiro Omodaka, Nagito Koide, Naoko Matsumoto, Toshikazu Onishi, Kazuki Tokuda, Masumichi Seta, Yukinori Kobayashi, Kengo Tachihara, Hidetoshi Sano, Yusuke Hattori, Sachiko Onodera, Yumiko Oasa, Kazuhisa Kamegai, Masato Tsuboi, Yoshiaki Sofue, Aya E. Higuchi, James O. Chibueze, Norikazu Mizuno, Mareki Honma, Erik Muller, Tsuyoshi Inoue, Kana Morokuma-Matsui, Hiroko Shinnaga, Takeaki Ozawa, Ryo Takahashi, Satoshi Yoshiike, Jean Costes, Sho Kuwahara
Publications of the Astronomical Society of Japan 69(5) 2017年10月1日 査読有り
© The Author 2017. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. For Permissions, please email:. The FUGIN project is one of legacy projects using a new multi-beam FOREST (four-beam receiver system on the 45 m telescope). This project aims to simultaneously investigate the distribution, kinematics, and physical properties of both diffuse and dense molecular gases in the Galaxy by observing 12 CO, 13 CO, and C 18 O J = 1-0 lines simultaneously. Mapping regions are parts of the first quadrant (10° ≤ l ≤ 50°, |b| ≤ 1°) and the third quadrant (198° ≤ l ≤ 236°, |b| ≤ 1°) of the Galaxy, where spiral arms, bar structure, and the molecular gas ring are included. This survey achieves the highest angular resolution to date (∼20″) for the Galactic plane survey in the CO J = 1-0 lines, which makes it possible to find dense clumps located farther away than the previous surveys. FUGIN will provide us an invaluable dataset for investigating the physics of the Galactic interstellar medium (ISM), particularly the evolution of interstellar gas covering galactic-scale structures to the internal structures of giant molecular clouds, such as small filaments/clumps/cores. We present an overview of the FUGIN project, the observation plan and initial results. These results reveal wide-field and detailed structures of molecular clouds, such as entangled filaments that have not been obvious in previous surveys, and large-scale kinematics of molecular gas, such as spiral arms.