论文标题
黑子剪切和与2013年8月17日M3.3耀斑相关的突然缩回运动
Sunspot shearing and sudden retraction motion associated with the 2013 August 17 M3.3 Flare
论文作者
论文摘要
在这封信中，我们对2013年8月17日（Sol2013-08-17T18：16）的M3.3类耀斑进行了详细的分析。它显示了最初从光球到电晕的相互磁相互作用的清晰图片，这是通过耀斑前的小太阳生的突然快速剪切运动，然后突然从电晕回到光电球，通过在火炬冲动阶段的同一太阳突的突然缩回运动。耀斑前约10小时，活性区域NOAA 11818中的一个小黑子开始沿着磁极性反转线（PIL）向东北移动，从而产生了一种剪切运动，改变了活动区域的准静态状态。在黑子运动的运动后激活了PIL上方的细丝，然后部分爆发。喷发最终导致了M3.3耀斑。然后将黑子突然拉回耀斑发作的相反方向。在向后运动期间，洛伦兹力量在大小和方向上同时进行了冲动的变化。发现其定向变化与缩回运动相符。该观察结果提供了直接证据表明黑子在驱动和触发耀斑中的剪切运动的作用。它特别证实，太阳耀斑期间黑子的突然运动是由冠状磁场重新配置引起的背部反应的结果。
In this Letter, we give a detailed analysis to the M3.3 class flare that occurred on August 17, 2013 (SOL2013-08-17T18:16). It presents a clear picture of mutual magnetic interaction initially from the photosphere to the corona via the abrupt rapid shearing motion of a small sunspot before the flare, and then suddenly from the corona back to the photosphere via the sudden retraction motion of the same sunspot during the flare impulsive phase. About 10 hours before the flare, a small sunspot in the active region NOAA 11818 started to move northeast along a magnetic polarity inversion line (PIL), creating a shearing motion that changed the quasi-static state of the active region. A filament right above the PIL was activated following the movement of the sunspot and then got partially erupted. The eruption eventually led to the M3.3 flare. The sunspot was then suddenly pulled back to the opposite direction upon the flare onset. During the backward motion, the Lorentz force underwent a simultaneous impulsive change both in magnitude and direction. Its directional change is found to be conformable with the retraction motion. The observation provides direct evidence for the role of the shearing motion of the sunspot in powering and triggering the flare. It especially confirms that the abrupt motion of a sunspot during a solar flare is the result of a back reaction caused by the reconfiguration of the coronal magnetic field.
