log(g) versus log(T_eff) diagrams of the stellar sample considered in this work. The bulge and the thick- and thin-disk stars are shown in black, cyan, and magenta respectively. The black filled circle and open circles are bulge dwarfs and giants. In each panel, we show the metallicities and the ages adopted to obtain isochrones from the Dartmouth Stellar Evolution Database (Dotter et al. 2008).