CO observations of IC 5146.
Abstract
Millimeter-wave (C-12)O and (C-13)O observations of the dark cloud complex immediately surrounding the young open cluster IC 5146 are reported. Two unusually intense (C-12)O sources are found, suggesting the presence of two or more obscured newly formed stars embedded in molecular gas at the periphery of the visible H II region associated with IC 5146. The total mass of the dark cloud complex is estimated to be 2500 solar masses, and the origin of the star-forming molecular shell around IC 5146 is considered. It is noted that IC 5146 is located at the tip of an elongated filamentary molecular cloud and, in this respect, is similar to Rho Oph and M17, where regions of active star formation are also located in dense cores at the tips of elongated molecular cloud complexes.
- Publication:
-
The Astronomical Journal
- Pub Date:
- March 1979
- DOI:
- 10.1086/112428
- Bibcode:
- 1979AJ.....84..336L
- Keywords:
-
- Carbon Monoxide;
- Interstellar Gas;
- Plasma Clouds;
- Star Clusters;
- Stellar Evolution;
- Brightness Temperature;
- H Ii Regions;
- Open Clusters;
- Stellar Spectra;
- Astrophysics;
- Carbon Monoxide:Dark Clouds;
- H II Regions:Star Formation;
- Molecular Clouds:Star Formation