Mach number (x-axis) compared to the velocity dispersion, σ, (top) and the non-thermal pressure fraction (bottom). The left (right) panel presents the quantities computed within R₅₀₀ (R_vir). Each marker represents a method to compute the velocity dispersion: dots for the 3D, ‘plus’ (square) for the sightline velocity dispersion and cross (diamond) for the standard deviation over the sightline velocity, both from EW (MW) projections. The values derived from the norm of the 3D velocity field are displayed in black. The quantities derived from the x, y, z, and cen components (indeed only x, y, z) or projections are respectively displayed in red, blue, green and pink.