Generalized similarity in finite range solar wind magnetohydrodynamic turbulence

Details Generalized similarity in finite range solar wind magnetohydrodynamic turbulence Generalized similarity in finite range solar wind magnetohydrodynamic turbulence

2009-11-18

arxiv.org/abs/0911.3623v1

Physics

Plasma Physics

Accepted for publication in PRL Nov 2009

Scientific paper

Extended or generalized similarity is a ubiquitous but not well understood feature of turbulence that is realized over a finite range of scales. ULYSSES spacecraft solar polar passes at solar minimum provide \textit{in situ} observations of evolving anisotropic magnetohydrodynamic turbulence in the solar wind under ideal conditions of fast quiet flow. We find a single generalized scaling function characterises this finite range turbulence and is insensitive to plasma conditions. The recent unusually inactive solar minimum -with turbulent fluctuations down by a factor of $\sim 2$ in power- provides a test of this invariance.

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