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arXiv 2103.16778physics.space-phastro-ph.EPphysics.plasm-ph
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水星动力学Magnetosphere述评:后信使时代与比较磁层

Review of Mercury's Dynamic Magnetosphere: Post-MESSENGER Era and Comparative Magnetospheres

Weijie Sun, Ryan M. Dewey, Sae Aizawa, Jia Huang, James A. Slavin, Suiyan Fu, Yong Wei, Charles F. Bowers

摘要:

本文综述了后信使时代水星磁层的研究,并将其与其他行星磁层,特别是地球磁层的动力学进行了比较。本文首先介绍了水星,包括它的行星际环境,磁层,外逸层和导电核心。本文综述了向阳面磁层顶频繁而强烈的磁重联,即通量传输事件“簇射”,以及它们对磁层顶的磁鞘等离子体β和磁剪切角的依赖性,以及它们对通量环流和磁层-地表-外逸层耦合的贡献。其次,综述了极端太阳事件下水星磁层的研究进展,包括太阳活动对昼侧磁层的核心感应和重联侵蚀,以及夜侧磁层的响应。然后,总结了等离子体片的晨昏特性,包括离子的特性、电流片的结构和磁重联的动力学。最后一个主题回顾了水星磁层中的粒子扰动,其中包括磁层顶边界上的开尔文-亥姆霍兹波的扰动、重联产生的磁结构和交叉尾电场。在每一章中,最后一节讨论了与每个主题相关的开放性问题,这些问题可以在模拟和未来的航天器任务中考虑。最后,我们总结了未来的BepiColombo机会,这是欧空局和JAXA之间的联合任务,正在前往水星。

英文摘要:

This review summarizes the research of Mercury's magnetosphere in the Post-MESSENGER era and compares its dynamics to those in other planetary magnetospheres, especially to those in Earth's magnetosphere. This review starts by introducing the planet Mercury, including its interplanetary environment, magnetosphere, exosphere, and conducting core. The frequent and intense magnetic reconnection on the dayside magnetopause, which is represented by the flux transfer event "shower", is reviewed on how they depend on magnetosheath plasma beta and magnetic shear angle across the magnetopause, following by how they contribute to the flux circulation and magnetosphere-surface-exosphere coupling. In the next, the progress of Mercury's magnetosphere under extreme solar events, including the core induction and the reconnection erosion on the dayside magnetosphere, the responses of the nightside magnetosphere, are reviewed. Then, the dawn-dusk properties of the plasma sheet, including the features of the ions, the structure of the current sheet, and the dynamics of magnetic reconnection, are summarized. The last topic reviews the particle energization in Mercury's magnetosphere, which includes the energization of the Kelvin-Helmholtz waves on the magnetopause boundaries, reconnection-generated magnetic structures, and the cross-tail electric field. In each chapter, the last section discusses the open questions related with each topic, which can be considered by the simulations and the future spacecraft mission. We close by summarizing the future BepiColombo opportunities, which is a joint mission between ESA and JAXA, and is en route to Mercury.

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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