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Fig. 2


Top panel: region of the Mg I triplet in ALW-8 (black line). The best-fit synthetic spectrum is plotted in red. The additional feature at 5170 Å is due to the chosen carbon abundance. Bottom panel: synthesis of the C2-band in ALW-8. The best-fit spectrum is shown in red ([C/Fe] = +1.39), while the blue and green lines have been computed for carbon abundances that differ by ±0.2 dex.

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