磁鞘
当前工作表
磁重联
物理
弓激波(空气动力学)
等离子体
磁层顶
冲击波
磁场
等离子板
湍流
电流(流体)
机械
天体物理学
磁层
磁流体力学
计算物理学
地球物理学
核物理学
热力学
量子力学
作者
Shimou Wang,San Lu,Quanming Lu,Rongsheng Wang,Junyi Ren,Xinliang Gao,Jin Guo
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-08-14
卷期号:10 (33)
被引量:1
标识
DOI:10.1126/sciadv.ado4639
摘要
Magnetic reconnection, the rearrangement of magnetic field topologies, is a fundamental plasma process throughout the universe, which converts magnetic energy to plasma kinetic energy and results in particle energization. A current sheet is a prerequisite for the occurrence of magnetic reconnection. It has been well documented that reconnecting current sheets are prevalent in turbulent plasmas. However, how these current sheets are formed remains unclear. Among natural plasmas, the region downstream of the Earth’s bow shock, the magnetosheath, is one of the most turbulent. Here, we show that the reconnecting current sheets in the turbulent magnetosheath originate from the waves in the region upstream of the shock. Once excited, the upstream waves are transmitted across the shock, compressed, and then transformed into current sheets in the downstream region. Magnetic reconnection subsequently occurs in these downstream current sheets. This process can be generalized to various shocked plasmas in astrophysical and laboratorial environments where turbulent magnetic reconnection should be common.
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