Age–metallicity plots exploring the properties of the stars in M. Xiang et al. (2025). (a) Full sample. (b) Shows where the stars with ruwe> 1.4 fall in orange. (c) Shows the stars with ﹩{\mathrm{log}}\,g\lt 3.2﹩ in orange. (d) Shows the stars with relative error in parallax > 0.2 in orange. (e) Shows the sample when it has been trimmed using ruwe, parallax, T_eff, and ﹩{\mathrm{log}}\,g﹩. (f) Shows the trimmed sample. (g) Shows the trimmed sample with stars with a relative error in age > 0.2 in pink. (h) Shows the trimmed sample with the stars with |z|> 1.5 kpc in pink. (i) 2D histogram of the full minus the trimmed sample. In this panel, the 2D histogram the maximum value in the gray scale is set to 58.