Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..428l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 1, 1983, p. 428-446. Research supported by the Robert A. Welch Fou
Astronomy and Astrophysics
Astrophysics
45
Astronomical Spectroscopy, Comets, Swan Bands, Band Structure Of Solids, Electron Transitions, Emission Spectra, High Resolution, Molecular Rotation, Resonance Fluorescence, Spectrum Analysis, Vibrational Spectra, Comets, West, Bands, Spectra, Temperature, Analysis, Observations, Fluorescence, Cooling, Techniques, Procedure, Molecular Processes, Abundance
Scientific paper
The present study of the comet West 1976 VI was intended to probe the C2 band structure by using sufficient spectral resolution to resolve the rotational structure of the bands. The study demonstrates that high-resolution spectra of the 0-0 Swan band provide an accurate determination of the C-12/C-13 ratio. The spectral resolution should, if possible, slightly exceed that employed on comet West. The conducted analysis of the C2 Swan Delta v = -1 sequence provides an excitation temperature of 3500 K for comet West at a heliocentric distance of 0.78 AU, which is considerably cooler than the vibrational temperature predicted by two recent calculations describing cometary C2 molecules bathed in sunlight.
Danks Anthony C.
Lambert David L.
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