论文标题
FeXIIλ1195.12的冠状活动区域的线轮廓研究使用hinode/eis
Line Profile Studies of Coronal Active Regions in Fe XII λ195.12 Using Hinode/EIS
论文作者
论文摘要
使用HINODE/EIS观测值从2006年12月至2019年12月分析其线轮廓，研究了冠状活动区域。该周期涵盖了太阳周期23的最后2年和太阳周期24。活动区域是太阳大气中磁场的主要来源，对其加热和动态很重要。从各个活动区域中获得线曲线，每月从太阳中传播到太阳，我们从中获得了强度，线宽度，多普勒速度和质心，并在太阳周期中检查了它们的变化。多普勒速度和质心的直方图表明，相对于静止波长的位置，它们以六种不同的方式行为。另外，发现质心的变化比多普勒速度更大。线宽度相对于多普勒速度或质心的变化主要遵循二级多项式。模拟了多组分线曲线，以解释多普勒速度的行为和相对于线宽度的质心的差异。我们还发现，不同数据集的强度和线宽度显示出对太阳周期的全局依赖性，具有良好的相关性。指出了结果对冠状加热和动态的含义。
Coronal active regions are studied using Hinode/EIS observations in the EUV line Fe XII λ195.12 by analyzing their line profiles from 2006 December to 2019 December. The period covers the last 2 yr of solar cycle 23 and solar cycle 24 fully. Active regions are the main source of magnetic field in the solar atmosphere, important in its heating and dynamics. Line profiles were obtained from various active regions spread across the Sun on a monthly basis from which we obtained the intensity, line width, Doppler velocity, and centroid and examined their variation during the solar cycle. The histograms of the Doppler velocity and centroid show that they behave in six different ways with respect to the position of rest wavelength. In addition, the shifts in the centroid were found to be more compared to the Doppler velocity. The variation of the line width with respect to the Doppler velocity or the centroid mostly follows a second-degree polynomial. A multicomponent line profile is simulated to explain the difference in the behavior of the Doppler velocity and the centroid with respect to the line width. We also find that the intensity and the line width of the different data sets show a global dependence on the solar cycle with a good correlation. The implications of the results for the coronal heating and dynamics are pointed out.
