论文标题
螺旋扭结突出的爆发失败的多波长观察
Multi-wavelength Observation of a Failed Eruption from a Helical Kink-unstable Prominence
论文作者
论文摘要
突出爆发的多波长观察为揭示触发的物理机制和喷发的进化过程提供了机会。在本文中，我们研究了2012年10月14日的爆发突出，记录在Hα，EUV和X射线波长中。喷发的过程提供了有关螺旋磁结构的存在的证据，并显示了转化为扭动的扭曲。估计的扭曲为〜6π（3弯），超过了扭结不稳定性的阈值。然后，上升的等离子体达到了高速，估计为228 km S-1，然后在2715 m S-2处突然快速加速，并且与太阳能同步。在AIA131Å和94Å图像中都观察到共同空间尖端的结构，表示磁重新连接的位置。爆发的通量绳最终经历了最大值391 m S-2的减速，甚至比太阳上的自由下降加速度甚至大，这表明喷发最终可能是由于内向磁性张力而导致的。
Multi-wavelength observations of prominence eruptions provide an opportunity to uncover the physical mechanism of the triggering and the evolution process of the eruption. In this paper, we investigated an erupting prominence on October 14, 2012, recorded in Hα, EUV, and X-ray wavelengths. The process of the eruption gives evidences on the existence of a helical magnetic structure and showing the twist being converting to writhe. The estimated twist is ~6π (3 turns), exceeding the threshold of the kink instability. The rising plasma then reached a high speed, estimated at 228 km s-1, followed by a sudden rapid acceleration at 2715 m s-2, and synchronous with a solar are. Co-spatial cusp shaped structures were observed in both AIA 131Å and 94Å images, signifying the location of the magnetic reconnection. The erupted flux rope finally undergone a deceleration with a maximum value of 391 m s-2, which is even larger than the free-fall acceleration on the Sun (273 m s-2) , suggesting that the eruption finally failed, possibly due to an inward magnetic tension force.
