太阳活动区中广泛存在的高速上升流
Widespread Occurrence of High-Velocity Upflows in Solar Active Regions
摘要：
我们进行了一个系统的研究，12个活跃地区（AR）的广泛的领域，磁通量和相关的太阳活动，以确定是否有上升流存在于AR边界，如果这些上升流存在，是否有一个高速不对称的蓝翼组件存在于上升流。为了识别AR上升流的存在和位置，我们通过将高斯函数拟合到{ \it Hinode}/EIS Fe XII 192.394\，谱线轮廓来导出相对多普勒速度图。为了确定在AR上升流中是否存在高速不对称分量，我们将双高斯函数拟合到Fe XII 192.394\，在位于AR上升流中的感兴趣区域中计算的平均光谱。在我们的样本中，在所有AR的东、西边界都观察到了上升流，平均上升流速度在-5 ~-26 km s $^{-1}$之间。蓝翼的不对称性出现在每一条线的轮廓中。与主要分量相比，次要高速非对称高斯分量之间的强度比对于大多数区域来说相对较小，然而，在少数情况下（8/30），该比较大并且在20至56%之间的范围内。这些结果表明，上升流和高速不对称的蓝翼组件是所有AR的共同特征。
英文摘要：
We performed a systematic study of 12 active regions (ARs) with a broad range of areas, magnetic flux and associated solar activity in order to determine whether there are upflows present at the AR boundaries and if these upflows exist, whether there is a high speed asymmetric blue wing component present in the upflows. To identify the presence and locations of the AR upflows we derive relative Doppler velocity maps by fitting a Gaussian function to {\it Hinode}/EIS Fe XII 192.394\,Å line profiles. To determine whether there is a high speed asymmetric component present in the AR upflows we fit a double Gaussian function to the Fe XII 192.394\,Å mean spectrum that is computed in a region of interest situated in the AR upflows. Upflows are observed at both the east and west boundaries of all ARs in our sample with average upflow velocities ranging between -5 to -26~km s$^{-1}$. A blue wing asymmetry is present in every line profile. The intensity ratio between the minor high speed asymmetric Gaussian component compared to the main component is relatively small for the majority of regions however, in a minority of cases (8/30) the ratios are large and range between 20 to 56~\%. These results suggest that upflows and the high speed asymmetric blue wing component are a common feature of all ARs.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
