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arXiv · 2506.05659

The Observations of Magnetic Reconnection During the Interaction Process of Two Active Region Filaments

Zongyin Wu·Zhike Xue·Xiaoli Yan·Jincheng Wang·Liheng Yang·Zhe Xu·Qiaoling Li·Yang Peng·Liping Yang·Yian Zhou·Xinsheng Zhang·Liufan Gong·Qifan Dong·Guotang Wu
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Abstract

We investigate the interaction between two filaments (F1 and F2) and their subsequent magnetic reconnection in active region (AR) NOAA 13296 and AR NOAA 13293 on May 9, 2023, utilizing high spatial and temporal resolution and multi-wavelength observational data from the Solar Dynamics Observatory, the New Vacuum Solar Telescope, and the Chinese H{\alpha} Solar Explorer. The movement of F1 from the southeast toward the northwest, driven by the motion of the positive magnetic polarity (P1), leads to a collision and reconnection with F2. This reconnection exchanges their footpoints, resulting in the formation of two new filaments (F3 and F4) consistent with "slingshot" type filament interaction. During the interaction, the current sheet moving due to the motion of F1 and the reconnection outflows moving along F3 and F4 were both observed. The current sheet is rarely observed in the slingshot type filament interaction, measuring approximately 2.17 Mm in length and 0.84 Mm in width. After the interaction, the F1 disappears whereas a portion of F2 remains, indicating that the interaction involves partial slingshot reconnection, due to the unequal magnetic flux between the filaments. The residual part of F2 will undergo another magnetic reconnection in the same interaction region with the magnetic loops connecting polarities N1 and P1. The material generated by the reconnection is continuously injected into F4, leading to its final morphology. The findings enhance our understanding of slingshot-type filament interactions, indicating that partial slingshot reconnections between filaments may be more common than full slingshot events.

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Zongyin Wu, Zhike Xue, Xiaoli Yan, Jincheng Wang, Liheng Yang, Zhe Xu, Qiaoling Li, Yang Peng, Liping Yang, Yian Zhou, Xinsheng Zhang, Liufan Gong, Qifan Dong, Guotang Wu. 2025-06-06. The Observations of Magnetic Reconnection During the Interaction Process of Two Active Region Filaments. https://doi.org/10.3847/1538-4357%2Fadc377

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