Xing Cao, Shaobei Wang, Binbin Ni, Danny Summers, Yuri Y. Shprits, Peng Lu, Minyi Long
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引用次数: 0
Abstract
Ion cyclotron waves at Io are important for understanding the complex interactions between Io and Jupiter's magnetosphere. In this study, we analyze the spatial distributions of ion cyclotron waves at Io using data from seven close flybys of Io—five by Galileo and two by Juno. We find that the amplitudes of ion cyclotron waves vary from several nT to ∼100 nT. The averaged wave amplitude reaches its peak at ∼2 RI downstream of Io and diminishes significantly with increasing distance from Io. While ion cyclotron waves are primarily observed downstream of Io, they also occur upstream but with much weaker amplitudes. Notably, these waves are absent within Io's Alfvén wings and plasma wake, likely due to the unique plasma environment in these regions. Our findings shed new light on the distribution properties of ion cyclotron waves at Io, which provide key inputs for exploring the interactions between Io and Jupiter.
木卫二上的离子回旋波对于了解木卫二与木星磁层之间复杂的相互作用非常重要。在这项研究中，我们利用伽利略号（Galileo）和朱诺号（Juno）分别七次和两次近距离飞越木卫二的数据，分析了木卫二离子回旋波的空间分布。我们发现离子回旋波的振幅从几 nT 到 100 nT 不等。平均波幅在木卫一下游 ∼2 RI 处达到峰值，并随着与木卫一距离的增加而显著减小。虽然离子回旋波主要是在木卫一下游观测到的，但在上游也会出现，只是波幅要弱得多。值得注意的是，在木卫一的阿尔弗文翼和等离子体尾流中没有这些波，这可能是由于这些区域独特的等离子体环境造成的。我们的发现为研究木卫二离子回旋波的分布特性提供了新的线索，为探索木卫二与木星之间的相互作用提供了关键信息。
期刊介绍：
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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