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Nonaxisymmetric anisotropy of solar wind turbulence as a direct test for models of magnetohydrodynamic turbulence
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Turner, A. J. (Andrew J.), Gogoberidze, Grigol and Chapman, Sandra C. (2012) Nonaxisymmetric anisotropy of solar wind turbulence as a direct test for models of magnetohydrodynamic turbulence. Physical Review Letters, Vol.108 (No.8). 085001. doi:10.1103/PhysRevLett.108.085001 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.108.085001
Abstract
Single point spacecraft observations of the turbulent solar wind flow exhibit a characteristic nonaxisymmetric anisotropy that depends sensitively on the perpendicular power spectral exponent. We use this nonaxisymmetric anisotropy as a function of wave vector direction to test models of MHD turbulence. Using Ulysses magnetic field observations in the fast, quiet polar solar wind we find that the Goldreich-Sridhar model of MHD turbulence is not consistent with the observed anisotropy, whereas the observations are well reproduced by the "slab+2D" model. The Goldreich-Sridhar model alone cannot account for the observations unless an additional component is also present. © 2012 American Physical Society.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 22 February 2012 | ||||
Dates: |
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Volume: | Vol.108 | ||||
Number: | No.8 | ||||
Page Range: | 085001 | ||||
DOI: | 10.1103/PhysRevLett.108.085001 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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