Mathematics – Probability
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ssrv..126...63l&link_type=abstract
Space Science Reviews, Volume 126, Issue 1-4, pp. 63-76
Mathematics
Probability
8
Mars, Atmospheric Photoelectrons, Mars Express, Numerical Modeling
Scientific paper
Atmospheric photoelectrons have been observed well above the ionosphere of Mars by the ASPERA-3 ELS instrument on Mars Express. To systematically interpret these observations, field lines from two global MHD simulations were analyzed for connectivity to the dayside ionosphere (allowing photoelectron escape). It is found that there is a hollow cylinder behind the planet from 1 2 R M away from the Mars-Sun line that has a high probability of containing magnetic field lines with connectivity to the dayside ionosphere. These results are in complete agreement with the ELS statistics. It is concluded that the high-altitude photoelectrons are the result of direct magnetic connectivity to the dayside at the moment of the measurement, and no extra trapping or bouncing mechanisms are needed to explain the data.
Barabash Stas
David Winningham J.
Fang Xiaohua
Frahm Rudy A.
Kozyra Janet U.
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