Spectral data and model

Spectral data used for characterization. This plots contains the blue spectra of 45 stars obtained at Pico dos Dias Observatory (black line). Main spectral lines are signaled. Red line represent the spectral model from sme with the parameters showen in Table 2.In some cases the normalization procedure distorted Hδ region. For these cases, the region was masked out of the model and denoted by a dotted line.用于天体特性表征的光谱数据。本图表包含于皮科杜斯迪亚斯天文台（Pico dos Dias Observatory）获取的45颗恒星的蓝端光谱（以黑线呈现），主要光谱线均已标注。红线代表基于sme生成的光谱模型，其参数详见表2。部分情况下，归一化流程会对Hδ谱线区域造成畸变；针对此类情况，已将该区域从模型中屏蔽，并以虚线标注。