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Fig. 7
Variation of the fit quality in the region 4060–4082 Å for different combinations of the C and O abundances (colour coded as a function of the reduced χ2) in the case of the SOPHIE spectrum of HD 93521. The best fit is found for log ϵ(C) = 7.70 dex and log ϵ(O) = 8.20 dex.
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