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arXiv 2004.10140physics.space-phphysics.plasm-ph
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太阳风与木星magnetosphere相互作用的极光诊断

Auroral diagnosis of solar wind interaction with Jupiter's magnetosphere

Z. H. Yao, B. Bonfond, D. Grodent, E. Chané, W. R. Dunn, W. S. Kurth, J. E. P. Connerney, J. D. Nichols, B. Palmaerts, R. L. Guo, G. B. Hospodarsky, B. H. Mauk,… 展开作者

Z. H. Yao, B. Bonfond, D. Grodent, E. Chané, W. R. Dunn, W. S. Kurth, J. E. P. Connerney, J. D. Nichols, B. Palmaerts, R. L. Guo, G. B. Hospodarsky, B. H. Mauk, T. Kimura, S. J. Bolton

摘要:

虽然木星磁层的质量和能量主要来自伽利略卫星木卫一的火山活动,但太阳风扰动在释放磁层能量和为木星极地地区的极光提供动力方面发挥着至关重要的作用。极光对太阳风压缩的系统反应仍然知之甚少。在这里,我们报告了一组极光图像的分析与同期在现场磁层顶检测。我们区分两种类型的极光增强:一个短暂的本地化的和一个长期持续的全球。我们发现,只有后者系统地出现在一个压缩的磁层顶下,而本地极光扩展可以发生在一个扩展的磁层顶。此外,我们直接检查以前的理论如何太阳风压缩增强极光发射。我们的研究结果表明,极光形态可以诊断行星上的太阳风条件时,现场测量是不可能的。

英文摘要:

Although mass and energy in Jupiter's magnetosphere mostly come from the innermost Galilean moon Io's volcanic activities, solar wind perturbations can play crucial roles in releasing the magnetospheric energy and powering aurorae in Jupiter's polar regions. The systematic response of aurora to solar wind compression remains poorly understood. Here we report the analysis of a set of auroral images with contemporaneous in situ magnetopause detections. We distinguish two types of auroral enhancements: a transient localized one and a long-lasting global one. We show that only the latter systematically appears under a compressed magnetopause, while the localized auroral expansion could occur during an expanded magnetopause. Moreover, we directly examine previous theories on how solar wind compressions enhance auroral emissions. Our results demonstrate that auroral morphologies can be diagnostic of solar wind conditions at planets when in situ measurements are not possible.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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