Kai Huang, Quanming Lu, Yi-Hsin Liu, San Lu, Xinmin Li, Huibo Tang, E. Peng
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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.
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.