Asymmetrical /sup 13/CO lines in dark clouds: Evidence for contraction
Journal Article
·
· Astrophys. J.; (United States)
Four /sup 13/CO spectra having similar and asymmetrical shapes (blueshifted peaks) were observed with 30 kHz resolution toward TMC2 and L134N. A radiative transfer model of a symmetric cloud indicates that each cloud is contracting along the two observed lines of sight. Contraction onto a static core fits the observed /sup 13/CO and C/sup 18/O lines slightly better than contraction with vproportionalr. The contraction speed approx.0.7 kms/sup -1/ and velocity dispersion approx.0.3 kms/sup -1/ are consistent with a 15 K cloud having a free-fall envelope and sonic turbulence.
- Research Organization:
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology
- OSTI ID:
- 6440366
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 242:3; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CONTRACTION
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FUNCTIONS
INTERSTELLAR SPACE
ISOTOPES
LIGHT NUCLEI
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIATION TRANSPORT
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA
SPECTRAL FUNCTIONS
STABLE ISOTOPES
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CONTRACTION
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FUNCTIONS
INTERSTELLAR SPACE
ISOTOPES
LIGHT NUCLEI
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIATION TRANSPORT
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA
SPECTRAL FUNCTIONS
STABLE ISOTOPES