The influence of the interplanetary magnetic field on the entry of solar wind ions into the magnetosphere

Details The influence of the interplanetary magnetic field on the entry of solar wind ions into the magnetosphere The influence of the interplanetary magnetic field on the entry of solar wind ions into the magnetosphere

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30g..60p&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 7, pp. 60-1, CiteID 1407, DOI 10.1029/2002GL016627

Physics

6

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Magnetospheric Configuration And Dynamics

Scientific paper

This study investigated the entry of solar wind ions into the magnetosphere by following particle orbits from the solar wind through the magnetopause boundary in time-dependent electric and magnetic fields obtained from a 3D global magnetohydrodynamic (MHD) simulation of the magnetosphere; five different orientations of the interplanetary magnetic field (IMF) were considered. We found the region of the upstream solar wind that mapped to the magnetopause entry regions to be parallel to the y-z orientation of the IMF. However, significant asymmetries were caused by the history of the IMF, the orientation of the interplanetary electric field (IEF), the nonadiabatic acceleration of ions at the magnetopause reconnection region, and acceleration by the magnetopause electric fields. Ions generally entered the magnetosphere through extended dayside regions corresponding to the reconnection region for each IMF and were accelerated by that region's electric fields. Entry also occurred along high-latitude open field lines convecting into the magnetotail.

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