HCO emission from H II-molecular cloud interface regions

Details HCO emission from H II-molecular cloud interface regions HCO emission from H II-molecular cloud interface regions

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..785s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 15, 1988, p. 785-796. Research supported by the Foreign Telescope

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Formyl Ions, H Ii Regions, Hyperfine Structure, Interstellar Matter, Molecular Clouds, Computational Chemistry, Radio Astronomy, Spectral Resolution

Scientific paper

A survey of well-known molecular clouds in the four strongest HCO N(k-,k+) = 1(01)-O(60) hyperfine transitions has been carried out to determine the prevalence of HCO and to study its chemistry. HCO emission was observed in seven molecular clouds. Three of these, NGC 2264, W49, and NGC 7538, were not previously known sources of HCO. In addition, NGC 2024 and Sgr B2 were mapped and shown to have extensive HCO emission. The survey results show the HCO abundance to be enhanced in H II-molecular cloud interface regions and support a correlation between C(+) and HCO emission. The strength of the HCO emission in NGC 2024 is interpreted in terms of this enhancement and the source structure and proximity to Earth.

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