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Fig. 2

image

Abundance ratios [Cu/Fe] as a function of [Fe/H] for the program stars, where LTE and non-LTE results are represented in the left and right panel, respectively. The high-α (open blue circles), low-α (filled red circles) and thick-disk populations (black crosses) are indicated (see the online version for color copies of the figures). G112-42 and G112-43 are connected with a straight line.

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