Neutral atomic carbon in dense molecular clouds

Details Neutral atomic carbon in dense molecular clouds Neutral atomic carbon in dense molecular clouds

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..774z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. 774-785.

Astronomy and Astrophysics

Astrophysics

37

Carbon, Carbon Monoxide, Emission Spectra, Fine Structure, Interstellar Matter, Molecular Clouds, Electron Transitions, Ground State, Line Spectra, Orion Nebula

Scientific paper

The authors have detected the 370 μm 3P2-3P1 fine-structure line of neutral carbon (C I) in seven sources: OMC 1, NGC 2024, S140, W3, DR 21, M17, and W51. Simultaneous analysis of these J = 2-1 data and available observations of the J = 1-0 line is used to deduce optical depths and excitation temperatures for these lines. These data indicate that both C I lines are likely to be optically thin, and that the ratio of C I to CO column densities in these clouds is typically ≡0.1.

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