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.