HR: 0800h
AN: NG21B-0516    [Abstracts]
TI: Subcritical Shocks With Kinematic Relaxation
AU: Gedalin, M
EM: gedalin@bgu.ac.il
AF: Department of Physics, Ben-Gurion University, POBox 653, Beer-Sheva, 84105, Israel
AU: * Balikhin, M A
EM: m.balikhin@sheffield.ac.uk
AF: Centre for Signal Processing and Complex Systems, The University of Sheffield, Mappin Street, Sheffield, S1 3JD, United Kingdom
AB: Ion heating in quasi-perpendicular collisionless shocks is due to ion gyration just behind the ramp. The gyrating distribution gyrotropizes due to kinematic gyrophase mixing. This collisionless relaxation occurs in high Mach number and low Mach number shocks as well. In low Mach number low beta shocks the relaxation is slow and the downstream ion pressure oscillates in space. The pressure oscillations cause magnetic field oscillations which should be observed as a periodic series of overshoots and undershoots.
DE: 7839 Nonlinear phenomena (4400, 6944)
DE: 7851 Shock waves (4455)
DE: 7852 Solitons and solitary waves (4455)
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting