Computer Science
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..113l&link_type=abstract
(Planetary studies; Proceedings of Symposium 4 and the Topical Meeting of the Interdisciplinary Scientific Commission B /Meeting
Computer Science
2
Atmospheric Models, Planetary Ionospheres, Satellite Atmospheres, Thermosphere, Triton, Atmospheric Heating, Atmospheric Ionization, Electron Precipitation, Ionospheric Electron Density, Solar Planetary Interactions
Scientific paper
On the basis of Voyager 2 observations, a simple model of Triton's thermosphere and ionosphere is built. Heating and ionization by solar EUV and precipitating electrons are computed. The main conclusions are: solar EUV flux at Triton is large enough to account for the observed exospheric temperature (95 K), but not for the observed electron densities; although N2(+) is the principal product of ionization, it is rapidly quenched in collisions with CH4 or H2 and N(+) is the major ion; the ionosphere is in chemical equilibrium below 700 km and in diffusive equilibrium above; ionization by a Maxwellian distribution of precipitating electrons with average energy 900 eV and total input 0.1 erg/cu cm/s can reasonably well account for the observed ionosphere.
Blanc Michel
Lellouch Emmanuel
Longaretti Pierre-Yves
Oukbir Jamila
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