Global hybrid simulations of the Martian plasma environment

Details Global hybrid simulations of the Martian plasma environment Global hybrid simulations of the Martian plasma environment

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....9095c&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #9095

Computer Science

Scientific paper

Two- and three-dimensional hybrid simulations of the global plasma environment of Mars, including the night side of the planet and the near wake, have been made on uniform grids with varying resolutions. The simulation code includes photoionisation and electron impact ionisation of neutral hydrogen and oxygen coronae although with a simplistic modelisation of the second process based on an adiabatic behaviour of the electron fluid. The densities of the neutral species are supposed to vary only with respect to the planetocentric distance accordingly to theoretical profiles. The simulation model also includes charge exchange processes between protons or oxygen ions both with neutral hydrogen and oxygen. Both two- and three-dimensional simulations clearly exhibit a well resolved bow shock, a pile-up region of the magnetic flux and a wake depleted of solar wind ions but partially filled with planetary ions. Spatial variations of densities of planetary or solar wind ions around the planet extend over four decades. The spatial scales of the simulated Martian environment are reasonable but due to a presently insufficient spatial resolution the bow shock, in the three-dimensional simulations, is located too far away from the planet but more realistic results are expected from simulations on supercomputers.

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