Evolution in radial distance (top) and energy (bottom) for examples of our selected analogues (different colours) over time in AURIGA halo 27. The solid lines correspond to the median of the stellar material of the accretion event, with the shaded region giving the 1σ, defined as 16–84% of the distribution. The dashed lines represent the median of the subhalo companions of group infall, tracked by following the most bound particle at infall.