Statistics – Applications
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p34b..03m&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P34B-03
Statistics
Applications
6025 Interactions With Solar Wind Plasma And Fields, 6225 Mars, 6281 Titan, 7823 Ionization Processes (2423), 7827 Kinetic And Mhd Theory
Scientific paper
Planetary atmospheres are strongly affected by their interaction with solar EUV and incident flowing plasma when atmospheres are not protected by an intrinsic magnetic field. The incident plasma is essentially the solar wind but in some cases it is flowing magnetospheric plasma. This interaction has been investigated by means of three dimensional multispecies hybrid simulation models coupling charged and neutral species via three ionisation mechanisms: the absorption of solar extreme ultraviolet radiation, the impacts of solar wind (or magnetospheric in Titan's case) electrons, and the charge exchange between the ions and neutral atoms or molecules. This interaction modifies significantly the ionized environment and contributes to the atmospheric erosion. An overview of simulation results, concerning both Mars and Titan plasma environment, are presented. A description of the Martian plasma environment with a uniform Cartesian spatial resolution of ~130 km is given by this simulation model. It reproduces all of the boundaries and regions observed by Mars-Express (MeX) and previous spacecrafts, such as the Bow Shock, the Magnetospheric Boundary, the magnetosheath, the ionosphere," . In addition, derived applications have been used to estimate the sputtering contribution to the oxygen escape, to estimate the alpha particle capture by the Martian atmosphere and to provide X-ray images of the Martian environment. Another version of this simulation model has been dedicated to investigate the Titan's plasma environment. Results are presented to characterize the main features of the simulated plasma environment of Titan: the induced magnetic tail and the flow of magnetospheric plasma around Titan, as well as the wake and the acceleration of the planetary plasma.
Chanteur Gerard
Modolo Ronan
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