Family of azimuthal velocity profiles for the solar wind, derived using different hybrid velocity profiles (v_r) and for a range of Alfvén point locations as indicated by the colorbar on the right. (Top left) Azimuthal velocity profiles using a hybrid velocity profile with r_s = 0.1. (Top right) Azimuthal velocity profiles using a hybrid velocity profile with r_s = 2.7. (Bottom left) The same family of profiles as the top right panel but including earlier measurements of v_ϕ as indicated in the legend. (Bottom right) The same as bottom left but including newer measurements of v_ϕ from Parker Solar Probe. The black rectangle indicates the field of view of the plot on the left.