Interstellar C2 in the Ophiuchus clouds

Details Interstellar C2 in the Ophiuchus clouds Interstellar C2 in the Ophiuchus clouds

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...124..188d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 124, no. 2, Aug. 1983, p. 188-196. Research supported by the Robert A. Welch F

Astronomy and Astrophysics

Astrophysics

49

Abundance, Carbon, Interstellar Chemistry, Molecular Clouds, Molecular Excitation, Infrared Spectra, Molecular Energy Levels, Molecular Rotation, Populations, Radial Velocity

Scientific paper

Interstellar lines of the C2 molecule are reported from high resolution high signal to noise spectra of ζ Oph, χ Oph and ρ Oph A. Rotational level populations for the C2 toward ζ Oph are not described by a single rotational temperature. The populations are quite consistent with a competition between collisional and radiative excitation under conditions expected for the ζ Oph cloud. The excitation of the C2 molecules toward χ Oph and ρ Oph A is similar to the results found for ζ Oph. The C2 column density is N(C2) = 2.2×1013, 3.5×1013 and 2.6×1013 cm-2 toward ζ Oph, χ Oph and ρ Oph A respectively.

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