论文标题
在M6.5级太阳耀斑期间热通道的形成和喷发
Formation and Eruption of Hot Channels during an M6.5 Class Solar Flare
论文作者
论文摘要
我们研究了与M6.5级耀斑相关的热通道的形成和喷发（Sol2015-06-22T18：23）于2015年6月22日在NOAA AR 12371中发生。在耀斑主相中观察到两个耀斑前体。 SDO/AIA在94Å和131Å中的观察结果表明，第一个热通道的早期形态是一组热环，被称为种子热通道。几个种子热通道在极性反转线上（pIL）上方形成，并且形成与沿PIL的脚点亮点的平行运动有关，该运动进入了耀斑主相的早期阶段。在此过程中，种子热通道积聚并缓慢上升，在第二个前体的峰值处加速。它们在形成更大热通道的加速过程中合并，然后形成“反向γ”形状扭结结构。在耀斑峰之前，第二个扭结频道的扭结频道出现在第一个爆发的第一个扭结热通道附近。这两个热通道的喷发在主耀斑的光曲线上产生了两个峰。沿PIL的脚步亮点的传播表明，由于拉链重新连接，可能形成第一个扭结热通道。 AIA观察到的种子热通道之间合并的发生由非线性无线场模型支持。第一个扭结热通道的观察到的扭动运动可能是由洛伦兹力驱动的。
We investigate the formation and eruption of hot channels associated with the M6.5 class flare (SOL2015-06-22T18:23) occurring in NOAA AR 12371 on 2015 June 22. Two flare precursors are observed before the flare main phase. Observations in 94 Å and 131 Å by SDO/AIA have revealed the early morphology of the first hot channel as a group of hot loops, which is termed as seed hot channel. A few seed hot channels are formed above the polarity inversion line (PIL) and the formation is associated with footpoint brightenings' parallel motion along the PIL, which proceeds into the early stage of the flare main phase. During this process, seed hot channels build up and rise slowly, being accelerated at the peak of the second precursor. They merge in the process of acceleration forming a larger hot channel, which then forms an "inverted γ" shape kinking structure. Before the flare peak, the second kinking hot channel with negative crossing appears near the first kinking hot channel that has erupted. The eruption of these two hot channels produce two peaks on the main flare's GOES light curve. The footpoint brightenings' propagation along the PIL indicate that the first kinking hot channel may be formed due to zipper reconnection. The occurrence of merging between seed hot channels observed by AIA is supported by the extrapolated nonlinear force-free field models. The observed writhing motion of the first kinking hot channel may be driven by the Lorentz force.
