Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm51a1322c&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM51A-1322
Physics
[2706] Magnetospheric Physics / Cusp, [2716] Magnetospheric Physics / Energetic Particles: Precipitating, [2753] Magnetospheric Physics / Numerical Modeling
Scientific paper
Large-scale global three-dimensional PIC simulations are performed with higher resolution (one grid size = 0.2 Re) in order to analyse the dynamics of the cusp boundary formation and particle entry as the interplanetary magnetic field (IMF) interacts with the terrestrial magnetosphere and later rotates from northward to southward direction. In the usual view of solar wind-terrestrial magnetosphere interaction, the ion and electron densities are strongly enhanced in the cusp region. In the present simulation, during the first stage of the IMF northward loading before the shock fully develops in front of the magnetopause, the cusp boundaries are gradually formed without large particle entry (IMG1). Within the cusp boundaries, only the electron density in night side boundary are enhanced while the ion density both in night and dayside boundary is enhanced. In the second stage, the Northward IMF fully interacts with the magnetosphere, the shock fully develops in front of the magnetopause, and both ion and electron strongly entry into the deep cusp regions (IMG2). These particle entries starts from the region where originally dayside cusp boundaries are formed, fill the whole cusp region, and further the particle entry region extends to night side boundary. In the third stage, when the IMF rotates from north to south, the particle entry becomes stronger into the deep cusp.
Cai D. S.
Lembege Bertand
Nishikawa Ken
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