Other
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..864m&link_type=abstract
Astrophysical Journal, Part 1, vol. 220, Mar. 15, 1978, p. 864-882.
Other
110
Absorption Spectra, Abundance, Atomic Spectra, Interstellar Gas, Microwave Spectra, Molecular Spectra, Ammonia, Carbon Monoxide, Formaldehyde, Hydrogen, Hydroxyl Emission, Infrared Spectra
Scientific paper
The density and temperature structure, kinematics, and chemistry of the dark cloud complex near Rho Oph are studied using maps of microwave spectral-line parameters for lines of H, OH, H2CO, and CO. The spatial extent of each cloud fragment as observed in a particular line is analyzed along with the variation of line width with spatial extent and the correlations among the densities of the observed species. The results obtained indicate that: (1) the observed species have spatial extents ranging from about 0.1 to 6 pc; (2) on a scale of less than about 1 pc, the cloud is organized into two main fragments; (3) the gas density varies within the fragments as the -1.3 power of radial distance; (4) the line width of a given species increases with its spatial extent, suggesting radial contraction of the fragments with a velocity of about half that expected in free fall; and (5) the abundances of H2CO, OH, and CO are similar to those in other large dark clouds and are strongly correlated with extinction.
Chin Gordon
Ho Pak Tung
Myers Phil C.
Pankonin Vernon
Schneps Matthew H.
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