Observations of globules and dark clouds in the CO J = 3-2 and J = 2-1 lines

Details Observations of globules and dark clouds in the CO J = 3-2 and J = 2-1 lines Observations of globules and dark clouds in the CO J = 3-2 and J = 2-1 lines

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..848a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 15, 1987, p. 848-859. SERC-supported research.

Other

14

Astronomical Spectroscopy, Carbon Monoxide, Dark Matter, Globules, Line Spectra, Molecular Clouds, Line Shape, Molecular Flow, Nebulae, Radiative Transfer, Velocity Distribution

Scientific paper

In a search for embedded molecular outflows, nine globules and compact dark clouds, including the known outflow sources B335 and L723, were observed in the (C-12)O J = 2-1 and J = 3-2 lines, and a Monte Carlo radiative transfer code utilizing a combination of microturbulent and velocity gradient line broadening was used to model the flows. Both the known sources are found to be of relatively low density and modest energy. It is found that n(H2) = 3000/cu cm in B335 and 1000/cu cm in the L723 high-velocity gas. None of the other seven clouds show clear evidence of bipolar outflows. Models of the globules B68 and B361 suggest efficient carbon isotope fractionation, with the (C-12)O and (C-13)O abundance ratios being 14 and 25, respectively.

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