Simulation of the Quasi-Perpendicular Bow Shock: Comparison with CLUSTER

Physics

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2154 Planetary Bow Shocks, 2159 Plasma Waves And Turbulence, 7843 Numerical Simulation Studies, 7851 Shock Waves

Scientific paper

Two-dimensional hybrid simulations of quasi-perpendicular shocks will be presented and compared with CLUSTER measurements. In the simulation wind protons and alpha particles are treated self-consistently, whereas pickup Helium ions are considered as test particles. We also include in the simulation model an ad hoc scattering mechanism which simulates cross-field diffusion. The temporal evolution of magnetic field profiles and ion distribution functions through the bow shock will be investigated for solar wind conditions and magnetic field - shock normal directions appropriate for the CLUSTER quasi-perpendicular low Mach number bow shock crossings on 25th December 2000, the high Mach number crossing on 24th January 2001, and for crossings on 31 March 2001. The simulations will be compared with CLUSTER-CIS solar wind ion measurement and published CLUSTER magnetic field measurement. Furthermore, predictions will be made for the interaction of pickup Helium ions with the bow shock.

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