Reformation of perpendicular shocks: Hybrid simulations

Details Reformation of perpendicular shocks: Hybrid simulations Reformation of perpendicular shocks: Hybrid simulations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..87h&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 24, pp. 87-1, CiteID 2234, DOI 10.1029/2002GL015915

Physics

Plasma Physics

24

Interplanetary Physics: Planetary Bow Shocks, Space Plasma Physics: Shock Waves, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Nonlinear Phenomena, Interplanetary Physics: Interplanetary Shocks

Scientific paper

We show that in one-dimensional hybrid simulations supercritical perpendicular shocks have a well-defined, slightly oscillating structure (including foot, ramp, overshoot, and undershoot) for hot upstream protons and low Mach numbers. In this case the reflected protons are able to stop the shock steepening at proton scales. However, for colder upstream protons and/or higher Mach numbers simulated shocks show a nonstationary feature, namely a periodic reappearance of a new shock front. These nonstationary shocks simulated by one-dimensional hybrid code have shock front gradient scales that are governed only by the spatial resolution used in the code. Consequently, we conclude that the one-dimensional hybrid code is not suitable for description of perpendicular nonstationary shocks.

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