The statistical properties of fast Alfvénic solar wind turbulence have been analyzed by means of empirical mode decomposition and the associated Hilbert spectral analysis. The stringent criteria employed for the data selection in the Wind spacecraft database, has made possible to sample multiple $k_{\Vert }$ field-aligned intervals of the three magnetic field components. The results suggest that the spectral anisotropy predicted by the critical balance theory is not observed in the selected database, whereas a Kolmogorov-like scaling ($E\left(k_{\Vert }\right)\sim k^{-5/3}$) and a weak or absent level of intermittency are robust characteristics of the Alfvénic slab component of solar wind turbulence.

中文翻译：

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快速太阳风中场对准的铝电子湍流和间歇性的统计分析

快速Alfvénic太阳风湍流的统计特性已通过经验模式分解和相关的希尔伯特谱分析进行了分析。Wind航天器数据库中用于数据选择的严格标准使对多个样本进行采样成为可能${ķ}_{\Vert }$三个磁场分量的磁场对齐间隔。结果表明，在所选数据库中未观察到由临界平衡理论预测的光谱各向异性，而类似Kolmogorov的标度（$Ë（{ķ}_{\Vert }）〜{ķ}^{-5/3}$）和弱或无间歇性水平是太阳风湍流的Alfvénic平板组件的强大特征。