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Anomalous resistivity due to nonlinear lower-hybrid drift waves

Vaivads, A.; Büchner, J.; Silin, I.

The generation of anomalous collision rate and resistivity by lower-hybrid drift waves is investigated. A general expression involving particle density and current perturbations and electromagnetic field fluctuations is used to estimate the effective collision frequency. Results of Vlasov-code simulations and Cluster spacecraft measurements sugges…

Wavelength and decay length of density overshoot structure in supercritical, collisionless bow shocks

Bale, S. D.; Horbury, T. S.; Saxena, R.

Above some critical Mach number, quasiperpendicular collisionless shocks are known to exhibit ``overshoot'' and ``undershoot'' structure thought to be associated with the motion of ions trapped at the shock front. Using spacecraft potential data from the Cluster spacecraft, the overshoot/undershoot density structure at 56 crossings of the quasiper…