Initial model conditions. Upper panel: Model stellar- (black solid line) and gas-mass (black dashed line) surface density profiles. Solid red line: Exponential stellar-mass surface density profile with a scale length of 2 kpc. Dashed red line: Analytical approximation to the gas surface density profile (see text). Lower panel: Model (black solid line) and observed asymmetric-drift-corrected (red line; Luo et al. 2023) rotation curve. Red dashed line: Observed rotation curve multiplied by a factor of 1.5.