Simulated thermal gas density, magnetic field and temperature. Top panels: central plane extracted from the cubes of the simulated thermal gas density (left), total magnetic field (central), and temperature (right) of two merging galaxy clusters. Each image covers an area of 6.42 Mpc × 6.42 Mpc. Bottom panels: spherically averaged radial profiles of the simulated thermal gas density (left), total magnetic field (central), and temperature (right) of the same system. These profiles were calculated in concentric spherical shells with a onevoxel width, 1 voxel =(10.7 kpc)³, and starting from the cluster’ centres. The shaded grey region indicates the radius above which the profiles must be taken with caution because the filament properties affect the profiles.