Spectral distribution of predicted radial velocities of the predicted UI+BI subpopulation for different terminal accretor masses within the fiducial volume. Lines of different colours indicate the sum over all runaways larger than the mass indicated in the key. Terminal accretor masses for each panel are M_f, WD = 1.0 M_⊙ for panel A, M_f, WD = 1.2 M_⊙ for panel B, M_f, WD = 1.4 M_⊙ for panel C and M_f, WD = 1.5 M_⊙ for panel D.