Anisotropy in Fast and Slow Solar Wind Fluctuations
The Astrophysical Journal2005Vol. 635(2), pp. L181–L184
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Abstract
Using 5 years of spacecraft data from near Earth orbit, we investigate the correlation anisotropy of solar wind magnetohydrodynamic-scale fluctuations and show that the nature of the anisotropy differs in fast (>500 km s-1) and slow (<400 km s-1) streams. In particular, fast streams are relatively more dominated by fluctuations with wavevectors quasi-parallel to the local magnetic field, while slow streams, which appear to be more fully evolved turbulence, are more dominated by quasi-perpendicular fluctuation wavevectors.
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