Energetic Ion Observations at the Cusp and Bow Shock

Details Energetic Ion Observations at the Cusp and Bow Shock Energetic Ion Observations at the Cusp and Bow Shock

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm32d..04c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM32D-04

Physics

2154 Planetary Bow Shocks, 2716 Energetic Particles, Precipitating, 2724 Magnetopause, Cusp, And Boundary Layers, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Previous studies have shown that solar wind ions are accelerated up to ˜150 keV/e at the quasi-parallel bow shock via the first order Fermi mechanism. It has been suggested that shock accelerated ions can directly enter the cusp when cusp and quasi-parallel shock are magnetically connected through the merging of IMF and geomagnetic field lines. Results from global hybrid simulations for a northward and antisunward IMF are consistent with the ion acceleration and transport processes. We present simultaneous observations of energetic ions from Interball and Polar in the foreshock and cusp region, respectively. Ion fluxes at the quasi-parallel bow shock agree with those in the cusp. Furthermore, energetic ions at both places demonstrate similar spectral characteristics. These results are consistent with the shock acceleration and ion transport processes.

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