Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm41b0794p&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM41B-0794
Physics
2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
This study investigates the entry of solar wind ions into the magnetosphere by launching millions of ions upstream in the solar wind and calculating their trajectories in time-dependent electric and magnetic fields obtained from a global magnetohydrodynamic (MHD) simulation of the magnetosphere. The MHD simulation used in this study is the Geospace Environment Modeling General Geospace Circulation Model which includes periods of northward, northwestward, westward, southwestward, and southward interplanetary magnetic field (IMF) orientations. We obtain the IMF-dependent entry profiles for solar wind ions at both the outer and inner surfaces of the magnetopause. Solar wind ion entry occurs through the subsolar point and through the reconnection region for each IMF orientation. An examination of the energy profiles of particles entering the magnetosphere shows that solar wind ions are slowed and convert streaming (kinetic) energy to thermal energy at the subsolar point. Plasma entering through reconnection sites shows evidence of acceleration to several keV in energy in reconnection fields.
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