The carbon monoxide fourth positive bands in the Venus dayglow. I - Synthetic spectra

Details The carbon monoxide fourth positive bands in the Venus dayglow. I - Synthetic spectra The carbon monoxide fourth positive bands in the Venus dayglow. I - Synthetic spectra

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.9115d&link_type=abstract

Journal of Geophysical Research, vol. 86, Oct. 1, 1981, p. 9115-9124.

Astronomy and Astrophysics

Astronomy

25

Astronomical Spectroscopy, Carbon Monoxide, Dayglow, Pioneer Venus Spacecraft, Ultraviolet Spectra, Venus Atmosphere, Emission Spectra, Fluorescence, Iue, Line Spectra, Spectral Bands, Spectral Sensitivity

Scientific paper

Recent observations of the Venus dayglow spectrum from 1200 to 1800 A are discussed, and identifications of the CO4+ bands are given using synthetic spectra. The main excitation mechanism is found to be resonant and fluorescent scattering of solar radiation, so the theory for this process is covered in some detail. A synthetic fluorescence spectrum is generated with the aid of high-resolution solar flux data, and emission rate factors are calculated. The influence of solar emission line excitation on this spectrum is demonstrated. In particular, it is shown that the uncertainties in interpreting the Venus dayglow are overcome by the identification of CO4+ bands in the v prime = 14 progression resulting from the fluorescent scattering by CO of solar Lyman alpha radiation.

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