Compressible Sub-Alfvenic MHD turbulence in Low-beta Plasmas
Preprint
- 17 May 2002
Abstract
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.Keywords
All Related Versions
- Version 1, 2002-05-17, ArXiv
- Published version: Physical Review Letters, 88 (24), 245001.
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