Results of the halo-finding algorithm for four different simulation runs. Top left: f_DP = 10% and η = 1.0. In this case there is no central subhalo. Top right: f_DP = 25% and η = 1.0. The algorithm found a small subhalo resulting from the Mach cones of the interacting dark plasma component. Bottom left: f_DP = 40% and η = 1.0. In this case, there is a clear central subhalo. Bottom right: f_DP = 40% and η = 10.0. In this case a central subhalo is present, and the distance of the outer subhalos is reduced. The scale of all pictures is given in kpc, and the contours represents the projected mass density.