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Fig. 2

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Example of spectral synthesis for our targets in the region from λ = 6110 Å to λ = 6151 Å. The colours differ according to the particular instrumental equipment, specifically in red the ESPaDOnS spectra, in green the HARPS spectra, and in blue the UVES spectra. The spectra are ordered, from top to bottom, by decreasing metallicity. The main spectral lines have been identified at the bottom.

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