Cyclic and Sub-Cyclic Self-Reformation of Quasi-Parallel Shocks in PIC Simulations

Details Cyclic and Sub-Cyclic Self-Reformation of Quasi-Parallel Shocks in PIC Simulations Cyclic and Sub-Cyclic Self-Reformation of Quasi-Parallel Shocks in PIC Simulations

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52b..03l&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH52B-03

Physics

2154 Planetary Bow Shocks, 7843 Numerical Simulation Studies, 7851 Shock Waves, 7867 Wave/Particle Interactions

Scientific paper

Self reformation of quasi-parallel shocks is analyzed with the help of full particle simulations. Present results fully recover the formation of cyclic self-reformations of the shock front previously evidenced with hybrid simulations by Scholer (1993). In addition, it is shown that, within one main cyclic period, (i) shorter-time subcycles are identified and are characterized by a strong emission of whistler precursor from the ramp, (iii) these precursors are steepened over spatial scale less than one ion inertia length, and (iii) intermittent (short-time life) spiky electrostatic field are emitted within one subcycle. These processes are shown to have a strong impact on the local ion reflection and on the shock self-reformation.

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