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Fig. 2


[F/Fe] vs. [Fe/H] in the stars analysed. Circles data points are: black, N-type Galactic carbon stars; red, J-type; green, SC-type and blue, extragalactic N-type carbon stars. Dashed lines represent theoretical predictions for a non-rotating 2 M TP-AGB star at different TPs, according to Cristallo et al. (2015b). A typical error bar is indicated.

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