Waves in Interplanetary Shocks: A Wind/WAVES Study

Details Waves in Interplanetary Shocks: A Wind/WAVES Study Waves in Interplanetary Shocks: A Wind/WAVES Study

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvl..99d1101w&link_type=abstract

Physical Review Letters, vol. 99, Issue 4, id. 041101

Physics

7

Planetary Bow Shocks, Interplanetary Shocks, Electrostatic Waves And Oscillations, Shock Waves And Discontinuities, Particle Acceleration

Scientific paper

We describe results from the first statistical study of waveform capture data during 67 interplanetary (IP) shocks with Mach numbers ranging from ˜1 6. Most of the waveform captures and nearly 100% of the large amplitude waves were in the ramp region. Although solitary waves, Langmuir waves, and ion acoustic waves (IAWs) are all observed in the ramp region of the IP shocks, large amplitude IAWs dominate. The wave amplitude is correlated with the fast mode Mach number and with the shock strength. The observed waves produced anomalous resistivities from ˜1 856Ω·m (˜107 times greater than classical estimates.) The results are consistent with theory suggesting IAWs provide the primary dissipation for low Mach number shocks.

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