Histograms of the relevant parameters of proton beam and alpha particles. The three panels from top to bottom show: (a) the distributions of proton beam and alphas number density normalized to the proton core number density N_core; (b) the distributions of proton beam and alphas total temperature normalized to the proton core total temperature T_core; (c) the distributions of proton beam and alphas velocity drift along the local magnetic field direction normalized to the local Alfvén speed (V^D cos θ^D)/V_A. Beam distributions are indicated by a solid line, alpha distributions by a dashed line.