The distribution of orbital properties z_max vs. r_apo for RR Lyrae (top panel) and nonvariable giants stars (bottom panel). The color-coding is based on values of ${\mathrm{\Omega }}_{\phi }^{\text{ine}}-{\mathrm{\Omega }}_{\mathrm{P}}$. The solid vertical line represents our separation between the Galactic bulge and other MW substructures (Galactic disk, outer bulge and halo). The dotted horizontal line approximately separates the Galactic disk and halo based on values for z_max.