Fig. 8.
Average [C/N] ratios of cluster member stars with log g cut as a function of log(Age[yr]) for the GES (orange circles) and the APOGEE (green circles) surveys. The yellow circles represent the GES literature results by Tautvaišienė et al. (2015). The red circles represent the mean value [C/N] for NGC 6705 and M 67. The straight line is the linear weighted least-squares fit of the data.
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