Kolmogorov and Irosnikov-Kraichnan scaling in the anisotropic turbulent solar wind

Details Kolmogorov and Irosnikov-Kraichnan scaling in the anisotropic turbulent solar wind Kolmogorov and Irosnikov-Kraichnan scaling in the anisotropic turbulent solar wind

2006-06-13

arxiv.org/abs/physics/0606106v1

Chapman, S. C., and B. Hnat (2007), Quantifying scaling in the velocity field of the anisotropic turbulent solar wind, Geophys

Physics

Plasma Physics

4 pages, 6 figures, submitted PRL

Scientific paper

10.1029/2007GL030518

Solar wind turbulence is dominated by Alfv\'{e}nic fluctuations but the power spectral exponents somewhat surprisingly evolve toward the Kolmogorov value of -5/3, that of hydrodynamic turbulence. We show that at 1AU the turbulence decomposes linearly into two coexistent components perpendicular and parallel to the local average magnetic field. The first of these is consistent with propagating Alfv\'{e}n wavepackets and shows the scaling expected of Alfv\'{e}nic turbulence, namely Irosnikov- Kraichnan. The second shows Kolmogorov scaling which we also find in the number and magnetic energy density, and Poynting flux.

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