Effect of the gas disk effective radius, R_gas, and height, H_gas, on the rotation curve. The values of the gas disk effective radius are 0.5 kpc (green), 1 kpc (orange), 5 kpc (blue), and 10 kpc (pink). The upper and lower boundaries (taking the absolute values) of each colored curve represent a disk height of 50 pc and 3 kpc, respectively. The other parameters are fixed to M_⋆ = 3 × 10¹⁰ M_⊙, R_⋆ = 4.0 kpc, H_⋆ = 0.5 kpc, f_gas = 0.2, i = 70°, and Q = 1.