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Compressible Sub-Alfvenic MHD turbulence in Low-beta Plasmas

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arxiv astro-ph/0205282 v1 pith:LPODYNMR submitted 2002-05-17 astro-ph physics.flu-dynphysics.geo-phphysics.plasm-phphysics.space-ph

Compressible Sub-Alfvenic MHD turbulence in Low-beta Plasmas

Jungyeon Cho , A. Lazarian This is my paper
classification astro-ph physics.flu-dynphysics.geo-phphysics.plasm-phphysics.space-ph
keywords modesturbulencealfvencompressiblefastslowlow-betaplasmas
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a model for compressible sub-Alfvenic isothermal magnetohydrodynamic (MHD) turbulence in low-beta plasmas and numerically test it. We separate MHD fluctuations into 3 distinct families - Alfven, slow, and fast modes. We find that, production of slow and fast modes by Alfvenic turbulence is suppressed. As a result, Alfven modes in compressible regime exhibit scalings and anisotropy similar to those in incompressible regime. Slow modes passively mimic Alfven modes. However, fast modes show isotropy and a scaling similar to acoustic turbulence.

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