Maps of halo velocities around the simulated Coma cluster. The gray square at the center marks the position of the Coma cluster. Orange lines are first, second, and third generation filaments (the case SD0−2σ for magnitude selected galaxies is reported here as an example, see brown lines in Fig. 2 and text). The top left panel shows the x − y projection, the top right panel shows the x − z projection, and the bottom left panel shows the z − y projection (shown in the first panel on the right column of Fig. 2). In each slice, the color map shows a 2D histogram in which in each bin the average v_rad, C is measured (red stands for halos moving away from Coma, blue for halos moving toward Coma, white pixels stand for empty bins). Black arrows are constructed from the average in each bin of the v_rad, C components relative to the projection shown (i.e., v_{rad, C, x} and v_{rad, C, y} in the top left panel, v_{rad, C, x} and v_{rad, C, z} in the top right panel, v_{rad, C, z} and v_{rad, C, y} in the bottom left panel). The thickness of the considered slice is of 20 Mpc h⁻¹, all halos in the slice are considered, regardless of mass or whether they are selected as galaxies. The labels mark the position of the simulated northeast and west filaments.