Kiel diagram and CMD for the 8 078 stars of the age bin (13 < Age (Gyr) < 14). For illustrative purposes, PARSEC stellar isochrones, for ages of 13 and 14 Gyr and [Fe/H]from -2.0 to 0.4 dex are included. The CMD uses JHKs absolute magnitudes from 2MASS, which were used as inputs for StarHorse to estimate ages. The contour levels represent 25%, 50%, 75%, and 100% of the distribution. In the bottom panel, the inset shows the MDF of the sample. The dotted line at [Fe/H]  = −0.38 represents the median [Fe/H].