The metal-poor tail of the APOGEE survey - II. Spectral analysis of Mg and Si in very metal-poor APOGEE spectra

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Fig. 6

[Si/Mg] vs. [Mg/H] for the GC stars in our sample (shown in black), along with APOGEE abundances for the same GCs (shown with the same symbols as our measurements). The dotted lines indicate y=x lines for each cluster that match the cluster stars at high [Si/Mg] values.

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