Asymmetric drift corrected rotation curves (cf. Section 2.1.1) for our M₂₀₀ = 10⁹ M_⊙ simulation at nine regularly spaced time intervals over the starburst cycle (bottom panel). The upper panel shows the star formation rate as a function of time; the lower panel shows the gas rotation curves at the times marked by the circles in the upper panel. The red circles correspond to a ‘starburst’ phase in the cycle; the blue to ‘post-starburst’; and the green to a more ‘quiescent’ phase. In Section 5.1.2, we will fit models to the three times marked by the black squares. Notice that there is a general trend that when the star formation rate is increasing, the rotation curve amplitude is higher (red), while when it is decreasing, the rotation curve amplitude is lower (blue). The black dashed line marks the true rotation curve as calculated from the gravitational potential.