Comparison of C(+) distributions with new interstellar sources of HCO emission

Details Comparison of C(+) distributions with new interstellar sources of HCO emission Comparison of C(+) distributions with new interstellar sources of HCO emission

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..170h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 1, 1983, p. 170-174.

Astronomy and Astrophysics

Astronomy

14

Abundance, Emission Spectra, Interstellar Matter, Molecular Clouds, Organic Compounds, Radio Astronomy, Astronomical Spectroscopy, Hydrocarbons, Ion Recombination, Milky Way Galaxy, Radicals

Scientific paper

The present investigation is concerned with two new sources of HCO emission (Sgr B2 and DR 21). The column densities of HCO are low in all objects observed. The data are consistent with HCO being located near appreciable sources of ultraviolet excitation as predicted by dJDB models. The correlation of C(+) and HCO expected from these models is less certain. Although two examples of good correlation are found (NGC 2024 and DR 21), three other regions (Sgr B2, Orion A, and Rho Oph) were observed where either CRRL emission was present and not HCO emission or vice versa. It is possible that this could be a result of low sensitivity or incomplete sampling or source geometry.

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