Physics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11401208h&link_type=abstract
Journal of Geophysical Research, Volume 114, Issue A1, CiteID A01208
Physics
7
Planetary Sciences: Solid Surface Planets: Magnetospheres (2756), Planetary Sciences: Solar System Objects: Mars, Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Magnetotail
Scientific paper
Three-dimensional multifluid simulations of the Martian magnetosphere show the development and dynamics of flux ropes. One flux rope, which is analyzed in detail, initiates at a reconnection region near the dusk terminator and travels tailward with a speed on the order of 40 km s-1. The reconnection region forms close to the planet at an altitude of 700 km. Both the location of the reconnection and energy spectra of the plasma in the reconnection region agree with Mars Global Surveyor observations of reconnection. The largest flux ropes have a spatial extent on the order of 2000 km. Energy spectra taken through the flux ropes show an inverted-V type structure similar to those measured by Mars Express, suggesting that some inverted-V observations may be transits through flux ropes. The simulations indicate that the formation of flux ropes can lead to enhanced loss of heavy ions from the atmosphere.
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