Specific angular momentum map (in color) for the model of ballistic rotating infall (Ulrich 1976) with R_d = 700 au and M_* = 1.1 M_⊙. The angular momentum varies from 25 au km s⁻¹ to 900 au km s⁻¹. The green hatched and red filled regions represent respectively the limits of the conical outflow derived from the tomography in Sect. 3 and the parabolic shape of the classical Hubble-law WDS model fit to the external CO outflow. The white and red contours outline the infalling streamlines with a specific angular momentum similar to the conical outflow j = 40–100 au km s⁻¹ (white), and to the WDS model j = 200–300 au km s⁻¹ (red). The black hatched region outline the streamlines with initial θ₀ = 70 ± 5° reproducing the infall signatures seen in DG Tau B (DV20).