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Fig. 7

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[S/Fe] and [Si/Fe] versus [Fe/H]. The left panel shows LTE sulphur abundances deduced from the 1045 nm triplet in black squares and the non-LTE corrected values in red circles. The middle panel shows the sulphur abundances deduced from the 1082 nm  [S   i]  line. The right panel shows the silicon abundance.

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