An out-of-plane CO (J = 2-1) survey of the milky way. I. The data

Seiichi Sakamoto, Tetsuo Hasegawa, Masahiko Hayashi, Toshihiro Handa, Tomoharu Oka

研究成果: Review article

44 引用 (Scopus)

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We present extensive CO (J = 2-1) survey data of the first quadrant of the Galaxy taken with the same angular resolution as the Columbia CO (J = 1-0) survey. The CO (J = 2-1) data were compared with the CO (J = 1-0) data of Cohen Dame, & Thaddeus. The distribution of CO (J = 2-1) emission mimics that of CO (J = 1-0) emission with the CO (J = 2-1)/CO (J = 1-0) intensity ratio ( ≡ R2-1/1-0) of 0.66 averaged over the observed area This value is typical of nearby giant molecular clouds and of gas disks of spiral galaxies and is consistent with the CO emission arising from subthermally excited, optically thick gas. Molecular gas in the inner part of the Galaxy tends to exhibit a higher value of R2-1/1-0 than in the solar neighborhood.

元の言語English
ページ(範囲)125-131
ページ数7
ジャーナルAstrophysical Journal, Supplement Series
100
発行部数1
DOI
出版物ステータスPublished - 1995 9
外部発表Yes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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