论文标题
冠状环的同时横向振荡和由圆形丝本耀斑激发的细丝
Simultaneous transverse oscillations of a coronal loop and a filament excited by a circular-ribbon flare
论文作者
论文摘要
为了调查冠状环和细丝中扭结振荡的激发,分析了2015年10月16日在活动区域12434中与井喷式喷射相关的C3.4圆形 - 丝线耀斑(CRF)。远程冠状环的耀斑激发小振幅扭结振荡。振荡持续了$ \ ge $ 4循环,没有大量阻尼。振幅和周期为0.3 $ \ pm $ 0.1毫米,207 $ \ pm $ 12 s。有趣的是,耀斑还激发了远程细丝的横向振荡。振荡持续了$ \ sim $ 3.5周期,并带有腐烂的振幅。初始振幅为1.7 $ - $ 2.2毫米。期间和阻尼时间为437美元 - $ 475 s和1142 $ - $ 1600 s。冠状环和细丝同时振荡的起点与硬X射线峰值时间并发。虽然尺寸很小且寿命短,但耀斑引发了链反应。它在色层中产生了明亮的次级耀斑色带(SFR),远程亮肤色(RB)与细丝相互辅助,并且间歇性的,间歇性的,类似喷射的流动在东北方向传播。循环振荡很可能会因耀斑引起的爆炸波以$ \ ge $ 1300 km s $^{ - 1} $的速度感到兴奋。灯丝振荡的激发更为复杂。爆炸波会触发远离主耀斑的二次磁重新连接,这不仅将局部血浆加热到更高的温度(SFR和RB),而且还会产生类似喷射的流动(即重新连接流出)。灯丝受到二级磁重新连接的干扰,并经历了横向振荡。这些发现为冠状环和细丝的横向振荡激发提供了新的见解。
To investigate the excitation of kink oscillations in coronal loops and filaments, a C3.4 circular-ribbon flare (CRF) associated with a blowout jet in active region 12434 on 2015 October 16 is analyzed. The flare excited small-amplitude kink oscillation of a remote coronal loop. The oscillation lasted for $\ge$4 cycles without significant damping. The amplitude and period are 0.3$\pm$0.1 Mm and 207$\pm$12 s. Interestingly, the flare also excited transverse oscillation of a remote filament. The oscillation lasted for $\sim$3.5 cycles with decaying amplitudes. The initial amplitude is 1.7$-$2.2 Mm. The period and damping time are 437$-$475 s and 1142$-$1600 s. The starting times of simultaneous oscillations of coronal loop and filament were concurrent with the hard X-ray peak time. Though small in size and short in lifetime, the flare set off a chain reaction. It generated a bright secondary flare ribbon (SFR) in the chromosphere, remote brightening (RB) that was cospatial with the filament, and intermittent, jet-like flow propagating in the northeast direction. The loop oscillation is most probably excited by the flare-induced blast wave at a speed of $\ge$1300 km s$^{-1}$. The excitation of the filament oscillation is more complicated. The blast wave triggers secondary magnetic reconnection far from the main flare, which not only heats the local plasma to higher temperatures (SFR and RB), but produces jet-like flow (i.e., reconnection outflow) as well. The filament is disturbed by the secondary magnetic reconnection and experiences transverse oscillation. The findings give new insight into the excitation of transverse oscillations of coronal loops and filaments.