Radial velocity distributions within (blue line) and outside (orange line) filaments at different radial distances from the cluster centre. The distance is decreasing from left to right and top to bottom as indicated in the panels. The dashed red and green curves show double Gaussian fits to the radial velocity distributions within and outside filaments, respectively. The individual Gaussian components of the fits are shown by dotted lines. The vertical dashed black line on the bottom right panel shows v_ff/2 at 1.25r₂₀₀; within filaments, approximately half of the gas (by mass) retains radial velocities v_rad <  v_ff/2 at r₂₀₀ <  r <  1.5r₂₀₀.