中等贫金属星高分辨率光谱分析 Ⅰ.光谱数据与等值宽度

High-Resolution Spectral Analysis ofthe Mildly Metal-Poor Stars I. Spectral data and equivalent widths

利用北京天文台兴隆观测基地2.16米望远镜的折轴阶梯光栅摄谱仪,获得了一批中等贫金属星的高分辨率、高信噪比光谱.通过MIDAS软件包对其中7颗中等贫金属星进行了光谱处理,得到了它们的等值宽度.最后给出了样本恒星的等值宽度及误差分析.

The high resolution, high signal to noise ratio spectra of a sample of mildly metal-poor stars were obtained with the Coude Echelle Spectrograph attached to the 2.16m telescope at Beijing Astronomical Observatory (Xinglong, China). The spectra are reduced with the MIDAS package and the equivalent widths of seven stars were measured. The error of the equivalent widths is estimated by comparing them with the other independent measurements made by the other authors. The standard deviations are presented in the end.