Location in the Galaxy and kinematics of the stars in our sample. Left panel: bi-dimensional histogram in the Z vs plane. The position of the Sun is indicated by the ⊙ symbol, while the Galactic centre is denoted by a × symbol. Right panel: Toomre’s diagram as a bi-dimensional histogram of the 685 087 stars in our sample having a radial velocity measure from Gaia DR3. In both panels the pixels (histogram bins) are colour-coded according to the median metallicity of stars in the bin.