Fig. 11
Position of the hottest targets in the temperature-gravity plane. Big circles: this work; small triangles: data from Moehler et al. (2011). Empty and full symbols refer to the helium abundances of the objects as defined in the text and shown in Fig. 10. The full and dashed lines show the position of the canonical zero-age and terminal-age HB for canonical and helium-enriched stars, respectively.
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