Fig. 4
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Abundance distributions. From left to right, the top row shows the distributions of [N/Fe]–[C/Fe], [Al/Fe]–[Mg/Fe], and [O/Fe]–[N/Fe]; the bottom row shows [Al/Fe]–[N/Fe], [Al/Fe]–[Si/Fe], and [Ce/Fe]–[N/Fe]. The data correspond to Terzan 2 stars from this work (orange stars), M107 (green circles) from Mészáros et al. (2020), and NGC 6569 (yellow circles) from Barrera et al. (2025). Typical uncertainties for Terzan 2 stars are also indicated.
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