Abstract
view Abstract Citations (87) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Titan's Upper Ionosphere Ip, W. -H. Abstract As a result of electron impact ionization and photoionization, an ionosphere should be built up at the high-altitude region of Titan's atmosphere. New calculations presented here predict the presence of significant amounts of CH5(+), N2H(+), C2H2(+), and C2H3(+) ions near the ionospheric peak. Because of fast ion-neutral reactions with CH4 and N2, the number density of the Ar(+) ions would not exceed a value of more than 10/cu cm in the upper ionosphere if argon has a mixing ratio about 0.01 near the homopause. The ionospheric flow dynamics are studied in the limits of one-fluid mass-loaded flow and of diffusion-convection approximation. Both approaches show that ion-neutral friction acts as a cushion against plasma streaming effects. Publication: The Astrophysical Journal Pub Date: October 1990 DOI: 10.1086/169271 Bibcode: 1990ApJ...362..354I Keywords: Electron Impact; Gas Ionization; Planetary Ionospheres; Satellite Atmospheres; Titan; Gas-Ion Interactions; Molecular Ions; Planetary Magnetospheres; Shear Layers; Lunar and Planetary Exploration; MOLECULAR PROCESSES; PLANETS: ABUNDANCES; PLANETS: MAGNETOSPHERES; PLANETS: SATELLITES; PLANETS: SATURN full text sources ADS |
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