Comparison of the velocity deviations measured in the HD 142527 system with vortex models. Top: Difference between the ¹³CO J = 3–2 velocity measured from our observations and the Keplerian prescription in a 2D-map (R, θ). Blue and red colors indicate blue- and redshifted velocities along the line-of-sight compared to the Keplerian rotation. θ = 0° represents the north of the major axis. Bottom: Three vortex prescriptions with their corresponding velocity amplitude in the planeof the disk (top), rotating clockwise around the vortex center on elliptical streamlines, and the projected velocity along the line-of-sight (bottom). Model A corresponds to a large vortex centered at the position of the continuum intensity maximum and Model B an equivalent vortex centered on the secondary maximum. Model C presents the kinematic signature for two smaller vortices at these positions.