Mean surface density, radial and azimuthal velocities for discrete wedges in ϕ of 0.125 radians each (from ϕ = −π to π, where ϕ = 0 is the direction that includes both the Be star and the secondary). The model parameters are indicated at the top of each column. The top and bottom plots compare models with low and high α, respectively. Dashed lines in the middle panel represent resonance radii close to the nodes (see text for details).