STEREO observations of upstream and downstream waves at low Mach number shocks

Details STEREO observations of upstream and downstream waves at low Mach number shocks STEREO observations of upstream and downstream waves at low Mach number shocks

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3603106r&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 3, CiteID L03106

Physics

Plasma Physics

1

Interplanetary Physics: Corotating Streams, Interplanetary Physics: Interplanetary Shocks, Interplanetary Physics: Mhd Waves And Turbulence (2752, 6050, 7836), Space Plasma Physics: Shock Waves (4455), Space Plasma Physics: Wave/Particle Interactions (2483, 6984)

Scientific paper

Early theories of upstream and downstream wave formation at laminar (low Mach number, low beta) shocks predicted that upstream waves would arise from phase-standing whistlers, propagating upstream along the shock normal. Downstream waves were attributed to nearly perpendicular shocks where waves had a different dispersion than the whistler mode, allowing them to stand downstream. Observations of low-Mach number shocks with STEREO reveal both upstream and downstream waves, but unlike the prediction of early theory, the downstream waves arise for a wide variety of shock conditions. These downstream waves appear to be compressional magnetosonic waves.

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