The result of the model tilted-ring fit derived in Weldrake et al. (2003). The left panels show the radial model position angle (P.A.), inclination (i), and model reference velocity (V _model). The right panel describes the model velocity field using the radial parameters in the left panels. The solid contours are in steps of 10 km s⁻¹ from −110 to 0 km s⁻¹.