Fig. 2
Top panel: circular velocities at t = 2 Gyr for the gS0, gSa and gSb models. Middle panel: time evolution of the bar pattern speeds, Ωb. Bottom panel: m = 2 Fourier amplitudes, A2/A0, as a function of time. Note that here we take the maximum values inside the bar; these are not sensitive to the lengths of the bars which can be seen in the bottom row of Fig. 1.
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