Dependence of solar wind power spectra on the direction of the local mean magnetic field
arXiv:0901.4940 · doi:10.1088/0004-637X/698/2/986
Abstract
(Abridged) Wavelet analysis can be used to measure the power spectrum of solar wind fluctuations along a line in any direction with respect to the local mean magnetic field. This technique is applied to study solar wind turbulence in high-speed streams in the ecliptic plane near solar minimum using magnetic field measurements with a cadence of eight vectors per second. The analysis of nine high-speed streams shows that the reduced spectrum of magnetic field fluctuations (trace power) is approximately azimuthally symmetric about B_0 in both the inertial range and dissipation range; in the inertial range the spectra are characterized by a power-law exponent that changes continuously from 1.6 \pm 0.1 in the direction perpendicular to the mean field to 2.0 \pm 0.1 in the direction parallel to the mean field. The large uncertainties suggest that the perpendicular power-law indices 3/2 and 5/3 are both consistent with the data. The results are similar to those found by Horbury et al. (2008) at high heliographic latitudes.
Submitted to: The Astrophysical Journal
References in corpus (9)
- Anisotropic scaling of magnetohydrodynamic turbulence
- Dynamic Alignment in Driven Magnetohydrodynamic Turbulence
- Imbalanced Strong MHD Turbulence
- Role of cross helicity in magnetohydrodynamic turbulence
- Strong Imbalanced Turbulence
- Strong Anisotropic MHD Turbulence with Cross Helicity
- Gyrokinetic turbulence: a nonlinear route to dissipation through phase space
- Numerical Measurements of the Spectrum in Magnetohydrodynamic Turbulence
- Inertial range turbulence in kinetic plasmas
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