论文标题
星际冠状质量弹出鞘中磁场波动的径向演变
Radial Evolution of Magnetic Field Fluctuations in an Interplanetary Coronal Mass Ejection Sheath
论文作者
论文摘要
行星际冠状质量弹出（ICMES）之前的压缩太阳风鞘通常显示出巨大的振幅磁场波动。随着ICME从太阳径向传播，这些波动的特性可能会显着发展。我们已经分析了Messenger在0.47 au观察到的ICME鞘中的磁场波动，随后由立体声B在1.08 au处观察到，航天器接近径向比对。径向变化的波动振幅，可压缩性，惯性频谱斜率，置换熵，Jensen-Shannon的复杂性和平面结构的变化被表征。讨论了这些变化有关上游太阳风的不断发展的湍流特性的讨论，从准平行到准垂直几何形状的鞘界变化的冲击以及鞘等离子体中复杂结构的发展。
The sheaths of compressed solar wind that precede interplanetary coronal mass ejections (ICMEs) commonly display large-amplitude magnetic field fluctuations. As ICMEs propagate radially from the Sun, the properties of these fluctuations may evolve significantly. We have analyzed magnetic field fluctuations in an ICME sheath observed by MESSENGER at 0.47 au and subsequently by STEREO-B at 1.08 au while the spacecraft were close to radial alignment. Radial changes in fluctuation amplitude, compressibility, inertial-range spectral slope, permutation entropy, Jensen-Shannon complexity, and planar structuring are characterized. These changes are discussed in relation to the evolving turbulent properties of the upstream solar wind, the shock bounding the front of the sheath changing from a quasi-parallel to quasi-perpendicular geometry, and the development of complex structures in the sheath plasma.
