Gas density profiles and maps. Top: radial profiles of gas density from 0.5R_500, c up to 10R_500, c. Grey lines indicate profiles of single objects, while coloured lines are the median values computed in different mass bins (see the colour legend). Bottom: median radial profiles of the gas density of different mass bins computed with respect to the median radial profile of the most massive bin (same colour legend as the upper plot). Insets: projected 2D electron gas density maps for the most massive (left; M_vir = 9.8 × 10¹⁴ h⁻¹ M_⊙, R_500, c = 1120.4 h⁻¹ ckpc) and the least massive (right; M_vir = 10¹³ h⁻¹ M_⊙, R_500, c = 252.5 h⁻¹ ckpc) objects in our sample. The blue circles represent 1, 3, 5, and 10R_500, c.