Peak position-velocity (PPV) diagrams of C¹⁸O 6–5 (top) and C¹⁷O 2–1 (bottom) at i = 45° after convolution with a 0.1″ beam. The red and blue symbols correspond to the red- and blue-shifted velocity components, respectively. The different panels present the PPV for the different simulations. Vertical solid lines show the disk radii extracted for the three models, dashed lines show the steep velocity profile (υ ∝ r^-1), and the solid cyan lines indicate the Keplerian curves. The stellar masses are indicated in the top right of each panel. The offset between blue- and red-shifted points are due to the limited spatial and spectral resolution at the high velocities.