Figure 4: Distribution of field star velocity changes for a set of scattering experiments in which the field star’s velocity at infinity relative to the binary was . The binary’s mass ratio was 1:1, and the orientation of the binary’s orbital plane with respect to the -axis was varied randomly between the scattering experiments. Each plot represents scattering experiments within some range of impact parameters in units of . (a) (b) (c) (d) . Solid lines in (a) and (b) are the distributions corresponding to scattering off a point-mass perturber. In (c) and (d), the mean of this distribution (which is very narrow) is indicated by the arrows. The gravitational slingshot is apparent in the rightward shift of the values when is small, due to the randomization of ejection angles (from [133]).