Positions of the HB stars observed by MUSE in both GCs, shown in red. Left panel: ω Cen. Right panel: NGC 6752. The positions of the stars analyzed in previous studies are also indicated. Moehler et al. (2011, green), Moni Bidin et al. (2012, blue), and Latour et al. (2018, yellow) are shown for ω Cen and Moehler et al. (1997, green) and Moni Bidin et al. (2007, blue) are shown for NGC 6752. The images are from the Digitized Sky Survey. (Copyright by Anglo-Australian Observatory/the Royal Observatory Edinburgh.)