Figure 9.

Real and imaginary parts of the two-dimensional Green function components G_j(r, t), where r = |r|, for v_β = 1 mm s⁻¹ and Γ = 1 s⁻¹. Each panel shows a contour plot of the response normalized to the maximum of Re[G_sum(r, t)] as indicated by the colour bars. (a) Re[G₁(r, t)], (b) Re[G₂(r, t)], (c) Re[G₃(r, t)], (d) Re[G₄(r, t)], (e) Re[G₅(r, t)], (f) Re[G_sum(r, t)], (g) Im[G₁(r, t)], (h) Im[G₂(r, t)], (i) Im[G₃(r, t)], (j) Im[G₄(r, t)], (k) Im[G₅(r, t)] and (l) Im[G_sum(r, t)], where Note that Im[G₅(r, t)] and Im[G_sum(r, t)] are zero everywhere. (Online version in colour.)