Fig. 3.
CMDs of pRGB stars. The green symbols are pRGB stars: open circles – stars with metallicity significantly higher than average (Kirby et al. 2017); asterisks – stars with enhanced CN band absorption (Kirby et al. 2017); dots – stars without spectroscopic measurements. Panels a and b: decontaminated CMDs from Subaru Suprime-Cam photometry (Stonkutė et al. 2014). Panel c: CMD from HST ACS photometry (Stonkutė et al. 2018b).
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