Fig. 7
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Trend of the heliocentric distances to individual RRab in our catalog versus their photometric metallicity. From top to bottom, the adopted PLZ are those by Muraveva et al. (2018); Neeley et al. (2019); Zgirski et al. (2023); Bhardwaj et al. (2023); Prudil et al. (2024). A linear fit highlights the presence of a slope, whose value is written in the labels, that is minimized for the PLZ by Prudil et al. (2024), which we select as the optimal one for the present work.
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