论文标题
SST/CRISP和SST/Chromis观察到光谱线和连续性的中心到中线变化
Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS
论文作者
论文摘要
光谱线和连续图的中心到末端变化(CLV)的观察为太阳能和恒星大气结构和光谱线形成的模型的准确性提供了良好的测试。它们也被广泛用于限制元素丰度,并且在大气研究中变得越来越重要。但是,对于色球线,只有少数此类数据集存在。我们旨在通过用瑞典1-M太阳能望远镜(SST)的酥脆和Chromis仪器制成的马赛克来创建一套标准配置文件,并探索使用此方法获得的所述配置文件的鲁棒性。对于每条光谱线,我们使用的镶嵌物范围从中心到肢体。这些镶嵌物中的每一个平均均为50个单独的光谱曲线,在$μ$比例尺上间隔为0.02。然后,在可能的情况下,将这些轮廓校正了P模式振荡,并在可能的情况下将其线参数(等效宽度,线移,全宽度和线深度)进行比较。我们提供了一组50个平均概况,这些平均概况沿着地狱性角度($μ$)的余弦等距为0.02,五个连续点在4001至7772Å之间,以及十个最常见的SST光谱线(Ca II H&K,H&K,H&k,H $β$β$β$ 517333173。 Fe I6301Å,H $α$,O I7772Å和Ca II8542Å)。线路配置文件和连续图的中心对上线变化在CD中以机器可读表共享;对旨在建模恒星气氛的理论模型提供定量约束。
Observations of center-to-limb variations (CLV) of spectral lines and continua provide a good test for the accuracy of models of solar and stellar atmospheric structure and spectral-line formation. They are also widely used to constrain elemental abundances and are becoming increasingly important in atmospheric studies of exoplanets. However, only a few such data sets exist for chromospheric lines. We aim to create a set of standard profiles by means of mosaics made with the CRISP and CHROMIS instruments of the Swedish 1-m Solar Telescope (SST), as well as to explore the robustness of said profiles obtained using this method. For each spectral line we use a mosaic that ranges from the center to the limb. Each of these mosaics are averaged down to 50 individual spectral profiles, spaced by 0.02 in the $μ$ scale. These profiles are corrected for p-mode oscillations, and their line parameters (equivalent width, line shift, full-width at half-maximum, and line depth) are then compared against literature values where possible. We present a set of 50 average profiles that are spaced equidistantly along the cosine of the heliocentric angle ($μ$) by steps of 0.02 for five continuum points between 4001 and 7772 Å, as well as ten of the most commonly observed spectral lines at the SST (Ca II H & K, H$β$, Mg I 5173 Å, C I 5380 Å, Fe I 6173 Å, Fe I 6301 Å, H$α$, O I 7772 Å, and Ca II 8542 Å). Center-to-limb variation of line profiles and continua are shared in the CDS as machine-readable tables; providing a quantitative constraint on theoretical models that aim to model stellar atmospheres.