Exploring Sources of Magnetospheric Plasma Using BATS-R-US

Details Exploring Sources of Magnetospheric Plasma Using BATS-R-US Exploring Sources of Magnetospheric Plasma Using BATS-R-US

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsm31b..01w&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SM31B-01

Physics

0545 Modeling (4255), 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2760 Plasma Convection (2463), 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

After decades of research, there is still no true consensus concerning the source or entry mechanism for plasma sheet and ring current particles in the magnetosphere. This work addresses the long standing problem by examining the source of magnetospheric plasma predicted by the multispecies version of the BATS-R-US MHD code. Two Hydrogen species, one ionospheric in origin and one solar wind in origin, are followed as they progress through the system during idealized simulations of various solar wind drivers. It is found that the magnetosphere has two modes of convection and plasma entry that depend on the solar wind conditions. During southward IMF, convection is reconnection-driven and the dominant source of plasma is ionospheric particles entering near the tail reconnection point. During northward IMF conditions, viscous interactions along the flanks of the magnetosphere drive convection and deliver large amounts of solar wind plasma to the system. These results are examined further by performing real-event simulations and making data-model comparisons using LANL Geosynchronous MPA particle data.

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