Triggering Mechanism for Eruption of Two Filaments Observed by the Solar Dynamics Observatory, Nobeyama Radioheliograph, and RHESSI
Triggering Mechanism for Eruption of Two Filaments Observed by the Solar Dynamics Observatory, Nobeyama Radioheliograph, and RHESSI
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DOI：
10.3847/2041-8213/ac7236
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发表时间：
2022-06
期刊：
影响因子：
--
通讯作者：
Sujin Kim;V. Yurchyshyn
中科院分区：
文献类型：
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作者：
Sujin Kim;V. Yurchyshyn
我们研究了两个暗条的爆发过程，这与2011年8月4日发生的M级耀斑有关。这些暗条部分重叠，一个在活动区，另一个就在活动区旁边，并一起爆发为晕状日冕物质抛射。在这项研究中，我们使用了太阳动力学天文台上的大气成像组件和日光层磁成像仪、Nobeyama射电日像仪17 GHz和RHESSI硬X射线卫星。我们发现三个不同的阶段，在微波通量分布和上升模式的细丝在事件。在第一阶段，有弱的非热发射在17 GHz和硬X射线。这些非热源出现在活动区的西暗条（F2）的一侧。F2从17 GHz的峰值开始变亮并迅速上升，而向平静区延伸的东暗条（F1）从17 GHz的峰值开始变亮。在第二阶段，非热辐射减弱，F2缓慢上升，而F1开始上升。在第三阶段，两个细丝一起爆发。由于F1在平静区稳定了很长一段时间，打破F1的平衡状态将是两个暗条成功爆发的决定性因素，很明显，F2的演化引发了不稳定的F1。我们认为，两个重叠的细丝之间的系绳切割重连触发了两个细丝作为一个纠结的身份爆发。
We investigate the eruptive process of two filaments, which is associated with an M-class flare that occurred in 2011 August 4. The filaments are partly overlapped, one in the active region and the other just beside it, and erupt together as a halo coronal mass ejection. For this study, we used the Atmospheric Imaging Assembly and the Heliospheric Magnetic Imager on board the Solar Dynamics Observatory, the Nobeyama Radioheliograph 17 GHz, and the RHESSI Hard X-ray satellite. We found three distinct phases in the microwave flux profile and in the rising pattern of the filaments during the event. In the first phase, there was weak nonthermal emission at 17 GHz and hard X-rays. Those nonthermal sources appeared on one edge of the western filament (F2) in the active region. The F2 began to be bright and rose upward rapidly, while the eastern filament (F1), which was extended to the quiet region, started to brighten from the peak time of the 17 GHz flux. In the second phase, the nonthermal emission weakened and the F2 rose up slowly, while the F1 began to rise up. In the third phase, two filaments erupted together. Since the F1 was stable for a long time in the quiet region, breaking the equilibrium state of the F1 would be decisive for the successful eruption of two filaments and it seems clear that the evolution of the F2 provoked the unstable F1. We suggest that tether-cutting reconnection between two overlapped filaments triggers the eruption of the two filaments as a tangled identity.