Three-dimensional local anisotropy of velocity fluctuations in the solar wind
Three-dimensional local anisotropy of velocity fluctuations in the solar wind
We analyse velocity fluctuations in the solar wind at magneto-fluid scales in two datasets, extracted from Wind data in the period 2005-2015, that are characterised by strong or weak expansion. Expansion affects measurements of anisotropy because it breaks axisymmetry around the mean magnetic field. Indeed, the small-scale three-dimensional local anisotropy …