The role of compressibility in solar wind plasma turbulence

Details The role of compressibility in solar wind plasma turbulence The role of compressibility in solar wind plasma turbulence

2004-11-30

arxiv.org/abs/astro-ph/0411793v1

Phys.Rev.Lett. 94 (2005) 204502

Astronomy and Astrophysics

Astrophysics

4 pages, 7 figures

Scientific paper

10.1103/PhysRevLett.94.204502

Incompressible Magnetohydrodynamics is often assumed to describe solar wind turbulence. We use extended self similarity to reveal scaling in structure functions of density fluctuations in the solar wind. Obtained scaling is then compared with that found in the inertial range of quantities identified as passive scalars in other turbulent systems. We find that these are not coincident. This implies that either solar wind turbulence is compressible, or that straightforward comparison of structure functions does not adequately capture its inertial range properties.

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