Normalised velocity of galaxies with respect to the cluster mean velocity vs. projected clustercentric distance for the cluster A2142, its outskirts subclusters, and infalling groups (see text). Lines separate approximately the early and late infall galaxies with increasing time of infall; two different boundaries separate early and late infall time galaxies. The earliest infall galaxies with infall time t_inf > 1 Gyr lie between the black dashed lines, calculated using R_vir, and late or ongoing infall galaxies with infall time t_inf < 1 Gyr lie above and below the lines, and on the right side of the lines (see Oman et al. 2013; Agulli et al. 2017, for details). The grey dash-dotted lines are calculated using R_max (see text). Notations of components C1–C3 and M1–M3 are the same as in Fig. 4. Notations of the BCGs and possible infalling groups are given in legend; E indicates the early infall region and L denotes the late infall region.