Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm41b1870p&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM41B-1870
Physics
[2455] Ionosphere / Particle Precipitation, [2459] Ionosphere / Planetary Ionospheres, [5408] Planetary Sciences: Solid Surface Planets / Aurorae And Airglow, [5435] Planetary Sciences: Solid Surface Planets / Ionospheres
Scientific paper
High energy H/H+ ion precipitation into planetary upper atmospheres for the cases of Titan and Mars are modeled and discussed. Such particle transport has previously been modeled for Earth and Mars for more uniform magnetic field conditions (guiding center principle) and we have extended this work using a Lorentz motion formulation for the Titan and Martian ionospheres using different cross sections for relevant atmospheric "background" species. Solar wind protons as well as pick-up ions from the planetary exosphere routinely enter and alter the upper atmosphere. A study of the ionization, excitation, and energy deposition is conducted. The result is a detailed examination of the influence of energetic ion transport on the upper atmospheres of planetary bodies. We also discuss the conclusions from a comparative planetology perspective, highlighting the similarities and differences between model assumptions and calculations.
Bougher Stephen W.
Brain David Andrew
Liemohn Michael W.
Lillis Robert J.
Parkinson Christopher D.
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