Computer Science
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992suny.rept.....f&link_type=abstract
Annual Progress Report State Univ. of New York, Stony Brook. Inst. for Terrestrial and Planetary Atmospheres.
Computer Science
Atmospheric Chemistry, Dayglow, Earth (Planet), Extreme Ultraviolet Radiation, Ionospheres, Spectrum Analysis, Thermosphere, Titan, Triton, Ambipolar Diffusion, Electron Impact, Ionic Diffusion, Nitrogen, Photoelectrons, Photoionization
Scientific paper
We have begun our studies of Titan and Triton by setting up a coupled ion and neutral chemical model of the ionosphere and thermosphere of Titan. The chemical scheme employs over 100 reactions and 46 species. Transport by diffusion and eddy diffusion of neutrals is included along with ambipolar diffusion of ions. We have computed the photoionization, photodissociations, electron impact excitation and ionization rates for the most important species, and the densities of ions and neutrals for a dayside model. We have computed the heating rates as a function of altitude and the heating efficiencies. We find that the heating efficiency in our standard model varies from about 30 percent near 800 km to 22 percent near 2000 km. We report here also on some photoelectron impact excitation rates for band systems of N2 in the Titan atmosphere. In the future, we propose to polish and publish our model, extend it to Triton, and look into excitation and emission of the N2 and N2(+) band systems.
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