Examples of spectral synthesis for six representative stars. The dots are the observational spectra, the solid lines are the best-fitting profile, and the dotted lines are the synthetic spectra with Si abundances of ± 0.15 dex with regard to the best fit, corresponding to less/more than 5% in the continuum. The listed parameters are Teff, log g, [Fe/H], and ξt, respectively.
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