A chain of dark clouds in projection against the galactic center

Takahiro Nagayama, Shuji Sato, Shogo Nishiyama, Yuka Murai, Tetsuya Nagata, Hirofumi Hatano, Mikio Kurita, Motohide Tamura, Yasushi Nakajima, Koji Sugitani, Tomoharu Oka, Yoshiaki Sofue

研究成果: Article査読

3 被引用数 (Scopus)


In a J, H, and Ks band survey of the Galactic center region over an area of 2° x 5°, we have found many dark clouds, among which a distinguished chain of dark clouds can be identified with a quiescent CO cloud. The distances of the clouds are estimated to be 3.2-4.2kpc, corresponding to the Norma arm, by our new method for determining the distances to dark clouds using the cumulative number of stars against the J - Ks color. By adopting these estimated distances, the size and total mass of the cloud are estimated to be ̃ 70 pc in length and 6 x 104 MG, respectively. Three compact H II regions exist in the cloud, indicating that star-forming activities are going on at the cores of the quiescent CO cloud on the spiral arm.

ジャーナルPublications of the Astronomical Society of Japan
出版ステータスPublished - 2009 4月 25

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学


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