标题： 利济和汉堡的太阳光谱图谱有何不同？ 显示英文标题

标题： How different are the Liège and Hamburg atlases of the solar spectrum?

摘要： 上下文：Delbouille及其同事（列日光谱图集）和Neckel及其同事（汉堡光谱图集）制作的高保真太阳光谱图集，被广泛认为是可见波长范围内太阳中心的最重要的参考光谱。这两个数据集是许多研究人员的基本资源，尤其是用于化学丰度分析。但尽管它们的发布规格相似（光谱分辨率、噪声水平），两个图集中的光谱线形状存在显著且系统性的差异。目标：了解任何仪器退化情况对于充分利用光谱数据的信息内容至关重要。我们旨在研究这些差异的程度，并解释可能的来源。我们提供了在将光谱与例如合成数据进行比较时需要考虑的波长依赖性校正参数。方法：将汉堡光谱的参数退化版本拟合到列日光谱。模型的参数（波长偏移、展宽、强度缩放、强度偏移）代表了各自仪器、观测策略和数据处理的不同特性。结果：列日和汉堡图集的波长尺度平均相差0.5 m{\AA }，标准差为$\pm$2 m{\AA }，除了 around 5500 {\AA }的一个特殊区域外。连续谱水平在5000 {\AA }以下最多偏移18%，但在向红色方向则稳定在0.8%的差异。我们没有发现列日光谱中存在光谱杂散光的证据。其分辨率几乎与波长无关，但限制在约216000，比规定的数值低两到六倍。在考虑了本工作中确定的退化因素后，两个图集的光谱在10$^3$的几个部分内一致。 显示英文摘要

摘要： Context: The high-fidelity solar spectral atlas prepared by Delbouille and co-workers (Li\`ege atlas), and the one by Neckel and co-workers (Hamburg atlas), are widely recognised as the most important reference spectra of the Sun at disc-centre in the visible wavelength range. Both datasets serve as fundamental resources for many researchers, in particular for chemical abundance analysis. But despite their similar published specifications (spectral resolution, noise level), the shapes of spectral lines in the two atlases differ significantly and systematically. Aims: Knowledge of any instrumental degradations is imperative to fully exploit the information content of spectroscopic data. We seek to investigate the magnitude---and to explain the possible sources---of these differences. We provide the wavelength-dependent correction parameters that need to be taken into account when the spectra are to be compared with e.g. synthetic data. Methods: A parametrically degraded version of the Hamburg spectrum is fitted to the Li\`ege spectrum. The parameters of the model (wavelength shift, broadening, intensity scaling, intensity offset) represent the different characteristics of the respective instruments, observational strategies and data processing. Results: The wavelength scales of the Li\`ege and Hamburg atlases differ on average by 0.5 m{\AA} with a standard deviation of $\pm$2 m{\AA}, except for a peculiar region around 5500 {\AA}. The continuum levels are offset by up to 18% below 5000 {\AA} but stably at a 0.8% difference towards the red. We find no evidence for spectral straylight in the Li\`ege spectrum. Its resolving power is almost independent of wavelength but limited to about 216000, between two to six times less than specified. When accounting for the degradations determined in this work, the spectra of the two atlases agree within a few parts in 10$^3$.