Observed CMDs of nuclear disk based on SIRIUS/2MASS (top, |l^*| < 1.55° and |b^*| < 0.3°) and inner bulge (bottom |l^*| < 2° and 0.3° < |b^*| < 1°. There are two sequences in the KMOS bulge data because of the variable extinction (see also Nogueras-Lara et al. 2018a). In blue we show all stars within the KMOS fields. The KMOS and APOGEE target stars are shown in black and red, respectively. The shown isochrones are from PARSEC. The gray polygons outline our CMD selection of targets. The blue H − K color limit varies slightly from field to field.