论文标题
太阳冠状环的短期衰减无链振荡的两飞机运动物检测
Two-Spacecraft Detection of Short-period Decayless Kink Oscillations of Solar Coronal Loops
论文作者
论文摘要
高分辨率成像仪（HRI）同时捕获了极端紫外成像仪（EUI）和大气成像组件（AIA）的衰老循环振荡（HRI），从11月5日至00:27 UT的22:58 UT（AIA）在2021年11月6日UT上进行了振动。分析的环的长度约为51毫米，短期为1-3分钟（平均1.6分钟），位移幅度为27-83 km。与HRI相比，AIA记录的信号延迟了66 s，HRI与从太阳到每种仪器的光线旅行时间差相吻合。校正此时间差后，两个数据信号之间的互相关系数从0.82到0.97不等，表明它们是一致的。这项工作证实了HRI看到与AIA相同的振荡，这是继续EUI检测时间尺度较短的时间尺度之前的必要第一步。此外，我们的结果表明，在使用HRI的扭结振荡研究中，消除射击程序的鲁棒性。
Decayless kink oscillations of an ensemble of loops are captured simultaneously by the High Resolution Imager (HRI) of the Extreme Ultraviolet Imager (EUI) and the Atmospheric Imaging Assembly (AIA) from 22:58 UT on 5 November to 00:27 UT on 6 November 2021. Oscillations are analysed by processing image sequences taken by the two instruments with a motion magnification technique. The analysed loops are around 51 Mm in length, and oscillate with short periods of 1-3 min (1.6 min in average) and displacement amplitudes of 27-83 km. The signals recorded by AIA are delayed by 66 s as compared to HRI, which coincides with the light travel time difference from the Sun to each instrument. After correction of this time difference, the cross-correlation coefficient between the signals from the two data varies from 0.82 to 0.97, indicating that they are well consistent. This work confirms that HRI sees the same oscillations as AIA, which is the necessary first step before proceeding to the detection of shorter time scales by EUI. In addition, our results indicate the robustness of the de-jittering procedure in the study of kink oscillations with HRI.
