Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 422, Issue 4, Pages 3495-3502Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2012.20859.x
Keywords
MHD; turbulence
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Funding
- LANL
- Humboldt Fellowship
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We revisit the issue of the spectral slope of magnetohydrodynamic (MHD) turbulence in the inertial range and argue that the numerics favour a GoldreichSridhar -5/3 slope rather than a -3/2 slope. We also perform precision measurements of the anisotropy of MHD turbulence and determine the anisotropy constant CA= 0.34 of Alfvenic turbulence. Together with the previously measured Kolmogorov constant CK= 4.2, or 3.3 for a purely Alfvenic case, it constitutes a full description of the MHD cascade in terms of spectral quantities, which is of high practical value for astrophysics.
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