Map depicting the azimuthal (“horizontal”) velocity field at orbital phase φ = 0.2 for case65c. Velocities that are larger than the rigid-body rotation rate are coded in light color, while those that are slower are coded in dark. The “blue dip” in the theoretical RV curve is caused by the extended blue wing in the photospheric absorption lines, and this is produced by the large white area near the approaching (left) limb of the star. The bottom panel is a plot of the azimuthal velocity perturbations along the equatorial latitude.