Detection of spicules termed rapid blueshifted excursions as seen in the chromosphere via H α and the transition region via Si iv 1394 Å line emission
Detection of spicules termed rapid blueshifted excursions as seen in the chromosphere via H α and the transition region via Si iv 1394 Å line emission
复制标题
针状体的检测被称为快速蓝移偏移，如通过 H–α 在色球层中看到的以及通过 Si– iv 1394 – 线发射在过渡区域中看到的
DOI：
10.1093/mnras/stac1895
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发表时间：
2022
影响因子：
4.8
通讯作者：
Doyle, J. Gerry
中科院分区：
文献类型：
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作者：
Vilangot Nhalil, Nived;Shetye, Juie;Doyle, J. Gerry
我们使用半自动检测方法在Siiv 1394发射线上显示了被称为快速蓝移漂移（RBE）的针状物的签名。我们利用瑞典1-m太阳望远镜CRISP成像分光偏振仪获得的H α滤波图和SJI 1400通道的界面区成像光谱仪数据研究了过渡区RBE的时空特征。RBE的探测是在±35 km s−1的H α多普勒图上使用定向日冕环追踪算法进行的。我们发现，检测到的特征的数量显着影响的检测图像，这是由大气视宁度条件的变化所造成的随时间变化的对比度值。我们检测到407个事件的寿命大于32秒。这个数字进一步减少到168 RBE的基础上的H α配置文件和接近的RBE的大规模流动。在这168个RBE中，有89个在SJI 1400射电通道中显示出清晰的时空特征，表明总共有个RBE在色球层和过渡区之间具有共空间特征。
We show signatures of spicules termed rapid blueshifted excursions (RBEs) in the Siiv1394 Å emission line using a semi-automated detection approach. We use the H α filtergrams obtained by the CRISP imaging spectropolarimeter on the Swedish 1-m Solar Telescope and co-aligned Interface Region Imaging Spectrograph data using the SJI 1400 Å channel to study the spatiotemporal signature of the RBEs in the transition region. The detection of RBEs is carried out using an oriented coronal loop tracing algorithm on H α Dopplergrams at ±35 km s−1. We find that the number of detected features is significantly impacted by the time-varying contrast values of the detection images, which are caused by the changes in the atmospheric seeing conditions. We detect 407 events with lifetime greater than 32 s. This number is further reduced to 168 RBEs based on the H α profile and the proximity of RBEs to the large-scale flow. Of these 168 RBEs, 89 of them display a clear spatiotemporal signature in the SJI 1400 Å channel, indicating that a total ofare observed to have co-spatial signatures between the chromosphere and the transition region.