Some molecular nitrogen emission from Titan-solar EUV interaction

Details Some molecular nitrogen emission from Titan-solar EUV interaction Some molecular nitrogen emission from Titan-solar EUV interaction

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8998h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 8998-9000.

Physics

3

Extreme Ultraviolet Radiation, Molecular Gases, Nitrogen, Solar Planetary Interactions, Titan, Atmospheric Models, Emission Spectra, Molecular Spectra, Voyager 1 Spacecraft

Scientific paper

Based on data obtained by the Voyager 1 ultraviolet spectrometer of the satellite Titan at a solar zenith angle of 73 deg, the photoelectric fluxes and the volume excitation rates of the LBH and BH bands of molecular oxygen were calculated. The mean free path in the atmosphere of Titan is 80 km at 3700 km, increasing to 80 km at 4000 km, and the local loss approximation is valid in the major part of the altitude range where the solar EUV energy is deposited. A large photoelectron flux peak noted at 9 eV corresponds to the 25 eV peak in the production rate, and the neglect of methane in the photoelectron degradation is justified. Source intensities of N2BH(v = 1) and N2LBH are an order of magnitude below observed intensities, in agreement with previous findings.

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