论文标题
由旋转网络磁场驱动的乙状结肠丝的形成和喷发
The Formation and Eruption of A Sigmoidal Filament Driven by Rotating Network Magnetic Fields
论文作者
论文摘要
我们介绍了由旋转网络磁场（RNF）驱动的sigmoidal灯丝的形成和爆发在大约140分钟内旋转近200度。 RNF的运动趋于首先加速，然后明显减速，因为平均旋转速度从10增加到150，然后减慢到50。然后在细丝F1和F2之间结合。同时，灯丝西南地区的细小结构参与了另一种结合相互作用。在两个相互作用区域中观察到随后由于血浆加热引起的EUV亮度。这些相互作用的结构，包括F1，F2和西南地区的精细结构，最终演变成与RNF所提供的相同方向扭曲的大型sigmoidal丝。乙状结肠丝的扭曲已超过4π，丝质最终爆发。乙状结肠丝的运动保持均匀，直到附近的喷射碰撞，从而使细丝更快地爆发。这些结果提供了RNF在乙状结肠丝的形成和喷发中起重要作用的证据。该现象还表明，扭结不稳定性是细丝喷发的触发机制。
We present the formation and eruption of a sigmoidal filament driven by rotating network magnetic fields (RNFs) near the center of the solar disk, which was observed by the one-meter aperture New Vacuum Solar Telescope (NVST) at Fuxian Solar Observatory (FSO) on 2018 July 12. Counterclockwise RNFs twist two small-scale filaments at their northeastern foot-point region, giving a rotation of nearly 200 degree within about 140 minutes. The motion of the RNF has a tendency to accelerate at first and then decelerate obviously, as the average rotation speed increased from 10 to 150 ,and then slowed down to 50 . Coalescence then occurs between filaments F1 and F2. Meanwhile the fine structures in the southwestern region of the filament was involved in another interaction of coalescence. The subsequent EUV brightening due to plasma heating is observed in the two interaction regions. These interacting structures, including F1, F2 and the fine structures in the southwestern region, eventually evolve into a larger-scale sigmoidal filament twisted in the same direction as the RNFs gave. The twist of the sigmoidal filament has exceeded 4π and the filament erupted finally. The motion of the sigmoidal filament keeps uniform until a nearby jet collides, causing the filament to erupt faster. These results provide evidence that RNF plays an important role in the formation and eruption of the sigmoidal filament. The phenomena also suggests that the kink instability is the trigger mechanism for the filament eruption.
