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Temperatures of galactic molecular clouds showing CO self-absorption
- Source :
- Astrophysical Journal.
- Publication Year :
- 1981
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1981.
-
Abstract
- The CO J = 2-1 line has been observed and, in most cases, mapped in 10 star-forming molecular clouds (W3, NGC 1333, NGC 2071, Mon R2, CRL 961, Rho Oph, W49N, W51A, DR 21, and Cep A). The CO J = 3-2 line has been observed in W3 and DR 21. The CO lines from all these sources are strongly self-absorbed. By comparing the present results with published CO(1-0) line profiles, it is found that large corrections to the temperatures of the cloud cores, as measured by the CO(1-0) lines, are required. The corrections for self-absorption bring the CO brightness temperatures into closer agreement with the grain temperatures inferred from far-IR photometry.
- Subjects :
- Astronomy
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Journal :
- Astrophysical Journal
- Notes :
- NGL-05-002-207, , NSF AST-79-16815
- Publication Type :
- Report
- Accession number :
- edsnas.19810050784
- Document Type :
- Report
- Full Text :
- https://doi.org/10.1086/158826