A large-scale CO J=3-2 survey of the galactic center

Tomoharu Oka, Makoto Nagai, Kazuhisa Kamegai, Kunihiko Tanaka

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have surveyed the central molecular zone (CMZ) of our Galaxy in the CO J3-2 line with the Atacama Submillimeter-wave Telescope Experiment (ASTE). Molecular gas in the Galactic center shows high J3-2/J1-0 intensity ratio (∼ 0.9) while gas in the Galactic disk shows the lower ratio (∼ 0.5). The high-velocity compact cloud CO 0.02-0.02 and the hyperenergetic shell CO 1.27+0.01, as well as gas in the Sgr A region exhibit high J3-2/J1-0 intensity ratio exceeding 1.5. We also found a number of small spots of high ratio gas. Some of these high ratio spots have large velocity widths and some seem to associate with nonthermal threads or filaments. These could be spots of hot molecular gas shocked by unidentified supernovae which may be abundant in the CMZ.

本文言語English
論文番号012
ページ(範囲)67-71
ページ数5
ジャーナルJournal of Physics: Conference Series
54
1
DOI
出版ステータスPublished - 2006 12月 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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