Time averaged global Fourier integrals p_i of through and beyond the interaction (which begins at t = 13.3 Gyr, and ends at t ≈ 14.25 Gyr in panels a), c), and d) (Models 16, 101, 201 respectively), and lasts approximately from 6.6 Gyr to 7.5 Gyr in panel b) (Model 17). In each panel the upper continuous curves are for m = 0, and the lower broken, dot-dashed and dotted curves are for modes m = 1,2,3 respectively.