The relative angular momentum loss of a p = 0 (solid line), p = 1/2 (dashed-dotted line), p = 1 (dotted line), and p = 7/4 (double-dotted line) disc-mass distribution including all particles bound more tightly to the central star than to the perturber and excluding unbound and accreted particles. The data is plotted for a) different periastron distances and an equal-mass perturber, and b) different perturber mass ratios and r_peri/r_disc = 1. The vertical dashed line indicates the initial outer disc radius.