Comparison of hydrodynamical models including a 2 M_Jup (yellow), 5 M_Jup (green), and 10 M_Jup (red) planet located at 0.2′′ with the observations (blue). Panel a: rotation velocity as a function of deprojected distance. The gray dash-dotted line indicates the unperturbed Keplerian profile around a 0.88 M_⊙ star. Panel b: deviation from Keplerian rotation of the hydrodynamical simulations at the τ = 1 surface. Panel c: deviation from Keplerian rotation of ALMA-simulated models and observations. The plot shows the running mean and standard deviations. The inner region up to 160 mas is affected by beam confusion effects and is therefore blocked out. In each panel, the gray shaded area indicates the extension of the continuum ring, and the vertical dotted line corresponds to the approximate location of PDS 70 b. The black bar in the first and third panel indicates the major axis of the beam (0.076′′).