V_H versus K-magnitude (as a proxy of the star-Sun distance) density distributions for the whole sample of bulge stars (first row) and for the zones that correspond with the contribution of the V_θ Galactic component field pattern: x< 0, y> 0 kpc (second row), x> 0, y> 0 kpc (third row), x> 0, y< 0 kpc (fourth row), and x< 0, y< 0 kpc (fifth row) for different birth radii. From left to right: all stars of the modelled galaxy, stars at birth radii r_ini< 2.5 kpc, 2.5 kpc ≤r_ini< 4.5 kpc, and r_ini ≥ 4.5 kpc . Only disk stars with | x | ≤ 2.5 kpc, | y | ≤ 3 kpc, and | z | ≤ 5 kpc were selected.