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Fig. 4

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Comparison of the final fastwind model (red), including the different species considered in the chemical analysis (He, C, N, O, Mg and Si) with the low resolution spectrum of HD 14818 (R = 1000 and SNR = 100) in black. The plot also displays the best model  − 0.20 and  + 0.20 dex in the abundances of the elements included in blue and green respectively. The final model provides a good match to the observation. The key diagnostic metal features are identified.

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