Short Scale Magnetic Turbulence In The Solar Wind

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The solar wind is a great paradigm for investigating magnetohydrodynamic turbulence. It is shown that the frame work of Hall magnetohydrodynamics (HMHD), which can support three quadratic invariants and allows nonlinear states to depart fundamentally from the Alfvenic, is capable of reproducing in the inertial range the three branches of the observed solar wind magnetic fluctuation spectrum the Kolmogorov branch k-5/3 steepening to k^{-α1} with α1 ≈ 3-4 on the high frequency side and flattening to k-1 on the low frequency side. These fluctuations are found to be associated with the nonlinear Hall-MHD Shear Alfven waves.

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