Models of Massive Molecular Clouds,
Abstract
Observations of carbon monoxide lines from massive molecular clouds, such as those near Orion A and Sgr B2, have recently been interpreted in terms of large scale motions, generally collapse or expansion, that imply rapid evolution of these clouds. The authors suggest an alternative explanation: the clouds are not dominated by large scale systematic motions and the CO profiles are determined primarily by local motions. Therefore, it is generally not possible to see through these clouds in optically thick lines of molecules such as CO and HCN. Some consequences and tests of this model are briefly discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0780922
Entities
People
- B. Zuckerman
- N. J. Evans Ii
Organizations
- Owens Valley Radio Observatory