Left: evolution of the different mass components within the same spherical radius of 50 kpc as in Fig. 10: (black) solid line shows the total mass, (red) short-dashed line the DM, (blue) dotted line the gas, and (magenta) long-dashed line the stellar mass. Right: the mass distribution inside a spherical radius of 30 kpc on the B-band luminous centre, at the best-fit age: (red) dashed line for the DM, (magenta) long-dashed for the stars, and (blue) dotted line for the gas component.