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Observational Test for a Random Sweeping Model in Solar Wind Turbulence

Glassmeier, K. H.; Narita, Y.; Perschke, C. +1 more

Evidence of frequency broadening at ion kinetic scales due to large-scale eddies and waves is found in solar wind turbulence by a test for a random sweeping model using the magnetic energy spectrum in the frequency vs wave number domain in the comoving frame of the flow obtained from multispacecraft observations. The statistical analysis of the fr…

Nonlinear Waves in the Terrestrial Quasiparallel Foreshock

Nakariakov, V. M.; Hnat, B.; Kolotkov, D. Y. +2 more

We provide strongly conclusive evidence that the cubic nonlinearity plays an important part in the evolution of the large amplitude magnetic structures in the terrestrial foreshock. Large amplitude nonlinear wave trains at frequencies above the proton cyclotron frequency are identified after nonharmonic slow variations are filtered out by applying…