Observations of neutral atomic carbon at 809 GHz

Details Observations of neutral atomic carbon at 809 GHz Observations of neutral atomic carbon at 809 GHz

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307l..75z&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. L75-L79.

Astronomy and Astrophysics

Astrophysics

28

Astronomical Spectroscopy, Carbon, Interstellar Matter, Molecular Clouds, Neutral Atoms, Abundance, Ground State, Line Spectra, Nebulae

Scientific paper

The authors have detected the 809 GHz 3P2-3P1 fine-structure line of neutral atomic carbon in four dense molecular clouds: M17, W51, W3, and DR21(OH). These observations complement the published observations of the 492 GHz 3P1-3P0 line and allow the excitation temperature of the 3P levels along with the line optical depths to be determined. The results indicate a ratio C I/CO ≈ 0.1 in dense molecular clouds.

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