Dispersive Nature of High Mach Number Collisionless Plasma Shocks: Poynting Flux of Oblique Whistler Waves

Details Dispersive Nature of High Mach Number Collisionless Plasma Shocks: Poynting Flux of Oblique Whistler Waves Dispersive Nature of High Mach Number Collisionless Plasma Shocks: Poynting Flux of Oblique Whistler Waves

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012phrvl.108b5002s&link_type=abstract

Physical Review Letters, vol. 108, Issue 2, id. 025002

Physics

Plasma Physics

Shock Waves And Discontinuities, Space Plasma Physics, Magnetohydrodynamics And Plasmas

Scientific paper

Whistler wave trains are observed in the foot region of high Mach number quasiperpendicular shocks. The waves are oblique with respect to the ambient magnetic field as well as the shock normal. The Poynting flux of the waves is directed upstream in the shock normal frame starting from the ramp of the shock. This suggests that the waves are an integral part of the shock structure with the dispersive shock as the source of the waves. These observations lead to the conclusion that the shock ramp structure of supercritical high Mach number shocks is formed as a balance of dispersion and nonlinearity.

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