Mean value of the velocity dispersion ratio ⟨ σ_z/σ_R ⟩ as a function of ε at ≈ 600–800 Myr (filled symbols) in various models; initial ⟨ σ_z/σ_R ⟩ values are shown by open symbols. Different symbols correspond to different groups of models in Table 1: diamonds for models C, D, E, G; squares for models I01, I02, I03, I04, I05, I07; triangles for models Kb and Kc. Model names are shown above the plot. Vertical error bars correspond to the range of the velocity dispersion ratio, which changes with radius in the final evolved state.