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Fig. 3.


Known Li-rich stars in GCs. Literature measurements are plotted as cyan symbols, our measurements for NGC 1261 are in magenta (for the Li-rich star) and purple (for the comparison star). Evolutionary phases are represented by different shapes as detailed in the legend. Different measurements of the same star are connected by segments. The Li-normal stars in NGC 6397 by Lind et al. (2009b) are shown in grey for comparison. The Spite and the low RGB plateaus are shown as yellow lines. Shaded regions represent the main group of Li-rich stars, enhanced by about 0.5–1.5 dex compared to normal stars (cyan region) and the extremely Li-rich stars, about 1.5 dex above them (magenta region).

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