论文标题
磁性半岛侵入相邻的对面区域，在太阳周期中触发最大的太阳耀斑24
Intrusion of Magnetic Peninsula toward the Neighboring Opposite-polarity Region That Triggers the Largest Solar Flare in Solar Cycle 24
论文作者
论文摘要
The largest X9.3 solar flare in solar cycle 24 and the preceding X2.2 flare occurred on September 6, 2017, in the solar active region NOAA 12673. This study aims to understand the onset mechanism of these flares via analysis of multiple observational datasets from the Hinode and Solar Dynamics Observatory and results from a non-linear force-free field extrapolation.最明显的特征是主要的负极性区域的侵入，与半岛相似，将西北定向到邻近的对面区域。我们还观察到与阴性半岛侵入相关的磁重新连接的代理：围绕侵入的阴性半岛周围的磁场的快速变化；阴性半岛尖端的前体亮度亮度，包括尖式增亮，显示出瞬时但显着的下降（〜100 km/s），处于尖口腿的腿部；一个黑色管状结构，似乎是X9.3耀斑爆发的磁通绳；沿着黑色管状结构的冠状亮度似乎代表了磁通绳下产生的电流。基于这些观察性特征，我们建议（1）负半岛的入侵对于促进推动模式磁性重新连接至关重要，形成和成长的磁通量绳将随着X2.2爆发而爆发的扭曲的磁通绳，（2）持续的入侵甚至在X2.2的范围之外促进了X2.2的范围，以促进X2.2的范围，以破坏启动的范围。
The largest X9.3 solar flare in solar cycle 24 and the preceding X2.2 flare occurred on September 6, 2017, in the solar active region NOAA 12673. This study aims to understand the onset mechanism of these flares via analysis of multiple observational datasets from the Hinode and Solar Dynamics Observatory and results from a non-linear force-free field extrapolation. The most noticeable feature is the intrusion of a major negative-polarity region, appearing similar to a peninsula, oriented northwest into a neighboring opposite-polarity region. We also observe proxies of magnetic reconnection caused by related to the intrusion of the negative peninsula: rapid changes of the magnetic field around the intruding negative peninsula; precursor brightening at the tip of the negative peninsula, including a cusp-shaped brightening that shows a transient but significant downflow (~100 km/s) at a leg of the cusp; a dark tube-like structure that appears to be a magnetic flux rope that erupted with the X9.3 flare; and coronal brightening along the dark tube-like structure that appears to represent the electric current generated under the flux rope. Based on these observational features, we propose that (1) the intrusion of the negative peninsula was critical in promoting the push-mode magnetic reconnection that forms and grows a twisted magnetic flux rope that erupted with the X2.2 flare, (2) the continuing intrusion progressing even beyond the X2.2 flare is further promoted to disrupt the equilibrium that leads the reinforcement of the magnetic flux rope that erupted with the X9.3 flare.
