Physics – Plasma Physics
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3206107k&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 6, CiteID L06107
Physics
Plasma Physics
19
Planetary Sciences: Comets And Small Bodies: Interactions With Solar Wind Plasma And Fields, Planetary Sciences: Solar System Objects: Moon (1221), Space Plasma Physics: Charged Particle Motion And Acceleration
Scientific paper
We study the formation of the lunar wake by a quasi-neutral hybrid (QNH) model. In the model ions are particles while electrons form a massless change neutralizing fluid. The model is three dimensional enabling us to study non-axisymmetric filling of the tail with solar wind plasma resulting from non-axisymmetric electromagnetic forces. We find that already a not fully kinetic QNH model can reproduce some of the basic observed features, namely (1) a long (over 10 lunar radii) tail of depleted plasma density, (2) enhanced magnetic field within the optical shadow and depressed magnetic field near the edge of the optical shadow and (3) non-Maxwellian plasma beams with high temperature anisotropy. The analysis also supports previous studies which have emphasized the role of the direction of the magnetic field and kinetic effects in the lunar wake.
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