Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 283-290 |
| Number of pages | 8 |
| Journal | Publications of the Astronomical Society of Japan |
| Volume | 61 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 Apr 25 |
| Externally published | Yes |
Keywords
- ISM: clouds
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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Nagayama, T., Sato, S., Nishiyama, S., Murai, Y., Nagata, T., Hatano, H., Kurita, M., Tamura, M., Nakajima, Y., Sugitani, K., Oka, T., & Sofue, Y. (2009). A chain of dark clouds in projection against the galactic center. Publications of the Astronomical Society of Japan, 61(2), 283-290. https://doi.org/10.1093/pasj/61.2.283