Compressible Kelvin-Helmholtz instability in supermagnetosonic regimes

Details Compressible Kelvin-Helmholtz instability in supermagnetosonic regimes Compressible Kelvin-Helmholtz instability in supermagnetosonic regimes

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11604223p&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A4, CiteID A04223

Physics

Plasma Physics

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Numerical Modeling, Space Plasma Physics: Shock Waves (4455), Space Plasma Physics: Mhd Waves And Instabilities (2149, 2752, 6050)

Scientific paper

We investigate the transition from submagnetosonic to supermagnetosonic regimes in the presence of a sheared flow and density variations typically observed between the solar wind and the Earth's magnetosphere. In particular, we show the possibility of generating quasi-perpendicular magnetosonic shock structures under typical conditions that can be realized at the magnetosphere flanks. Here the Kelvin-Helmholtz instability generates rolled-up, large- scale vortices that propagate along the flanks of the magnetosphere. The shocks are generated by those vortices for which the magnetosonic Mach number turns out to be of the order of unity or larger.

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