用短x线驱动磁重联的磁通管之间的二次重联

IF 4.6 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Kai Huang, Quanming Lu, Yi-Hsin Liu, San Lu, Xinmin Li, Huibo Tang, E. Peng
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引用次数: 0

摘要

对相邻导场重连x线所产生的磁通管二次重连进行了三维细胞内粒子模拟研究。二次重联磁场向扩散区方向增强,与观测结果吻合较好。磁场堆积归因于上游的磁张力,它将磁通管相互撞击。我们提出一次重联x线长度是决定磁通管形成和二次重联的关键参数。只有当x线较短时,才会形成相互连接的磁通管;当x线足够长时,形成规则的通量绳。形成互连磁通管的临界x线长度由两个相邻x线之间的距离和一次重联的磁剪切角决定。研究结果为三维重联过程中二次重联的产生提供了一种新的场景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Secondary Reconnection Between Interlinked Flux Tubes Driven by Magnetic Reconnection With a Short X-Line

Secondary Reconnection Between Interlinked Flux Tubes Driven by Magnetic Reconnection With a Short X-Line

A three-dimensional particle-in-cell simulation is performed to study secondary reconnection between two interlinked flux tubes produced by neighboring guide field reconnection x-lines. The reconnecting magnetic fields of this secondary reconnection is enhanced toward the diffusion region, agree well with that in observations. The magnetic field pileup is attributed to the upstream magnetic tension force, that smashes the flux tubes into each other. We propose that the primary reconnection x-line length is a key parameter to determine the formation of interlinked flux tubes and secondary reconnection therein. Interlinked flux tubes will form only if the x-line is short; when the x-line is long enough, the regular flux ropes are formed instead. The critical x-line length to form interlinked flux tubes is determined by the distance between two neighbor x-lines and the magnetic shear angle of the primary reconnection. The results provide a novel scenario of secondary reconnection generation during three-dimensional reconnection.

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来源期刊
Geophysical Research Letters
Geophysical Research Letters 地学-地球科学综合
CiteScore
9.00
自引率
9.60%
发文量
1588
审稿时长
2.2 months
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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