Figure 8.

Behaviour of a_j(k) as a function of k using v_β = 1 mm s⁻¹ and different Γ. Decreasing colour shade from dark to light represents data for a₁, a₂, a₃, a₄ and a₅, respectively. (a) |a_j| when Γ = 1.0 s⁻¹, (b) Arg[a_j] when Γ = 1.0 s⁻¹, (c) |a_j| when Γ = 0.6 s⁻¹ and (d) Arg[a_j] when Γ = 0.6 s⁻¹. Note that for panel (a), the curves of a₁ and a₃ are exactly underneath a₂ and a₄, respectively, for all k. For panel (c), a₃ is exactly underneath a₄ for all k while a₁ superimposes with a₂ for k ≥ k_c ≈ 510 m⁻¹. (Online version in colour.)