Solar wind and magnetospheric ion impact on Mercury's surface

Details Solar wind and magnetospheric ion impact on Mercury's surface Solar wind and magnetospheric ion impact on Mercury's surface

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30qssc2k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 17, pp. SSC 2-1, CiteID 1877, DOI 10.1029/2003GL017842

Physics

30

Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6030), Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Planetary Sciences: Magnetospheres (2756), Planetology: Solar System Objects: Mercury

Scientific paper

The impact of the solar wind protons on the surface of Mercury is studied by a global hybrid model. In the three-dimensional self-consistent quasi-neutral hybrid (ions are particles, electrons are a fluid) model ions can hit the surface of the planet. The response of the impact to several solar wind conditions is studied by analyzing four upstream cases: pure northward interplanetary magnetic field (IMF), pure southward IMF, the Parker spiral IMF, and atypically high solar wind speed. Three different high impact regions on the surface can be identified: (1) ``auroral'' impact on the equatorward side of the open/closed field line boundary, (2) ``cusp'' impact on the dayside in the noon midnight meridian plane, and (3) ``nose'' impact around the subsolar point when the solar wind dynamic pressure is high. The particle flux also has North-South and dawn-dusk asymmetries.

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