Models of molecular clouds and the abundances of H2CO and HCO/+/

Details Models of molecular clouds and the abundances of H2CO and HCO/+/ Models of molecular clouds and the abundances of H2CO and HCO/+/

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..532w&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 1, 1980, p. 532-546. Research supported by the R. A. Welch Foundation and Resear

Other

79

Abundance, Astronomical Models, Formaldehyde, Interstellar Matter, Molecular Clouds, Physical Properties, Positive Ions, Radiative Transfer

Scientific paper

Observations of HCO(+) and H2CO in a sample of 13 molecular clouds have been analyzed by construction of uniform, spherical cloud models. The total densities and the abundance of HCO(+) and H2CO relative to H2 which result from these models fall into two domains: one group of clouds has a low temperature, moderate density, and high abundances; the other group has higher temperature and density, but lower abundances. The factor distinguishing these groups may be depletion onto grains in the denser sources.

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