Statistics – Computation
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52b..04m&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH52B-04
Statistics
Computation
2154 Planetary Bow Shocks, 7843 Numerical Simulation Studies, 7851 Shock Waves, 7867 Wave/Particle Interactions
Scientific paper
We have studied the dynamics of ions and elelctrons in the foot and ramp of almost perpendicular shocks in the supercritical Mach number regime by particle-in-cell (PIC) simulations.In the past, nonrealistic ion to electron mass ratios have been used in such simulations in order to reduce the computational strain. It is found that when a realistic mass ratio is used oblique whistler waves are generated in the foot region via the interaction of incoming and reflected ions with the solar wind electrons. The linear instability has been investigated by three-fluid analysis and exhibits a growth rate which increases strongly with the mass ratio. Since low beta shocks exhibit a cyclic reformation process this instability has not yet been seen in low mass ratio PIC simulations. We have analyzed the nonlinear development of the instability and the associated parallel and perpendicular electron heating.
Matsukiyo Shuichi
Scholer Manfred
Shinohara Iku
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