Three-dimensional representation of the disk and streamer with two attached streamlines at time 70 kyr. Red surfaces correspond to the disk, while green surfaces represent the streamer. Both streamlines start at R = 350 au and φ = φ_streamer with respectively Z = 0 (orange solid line) and Z = 100 au (blue solid line). Black dots indicate shocks (or rarefactions) along the streamlines while the gray dot corresponds to a density transition (see Fig. 14 for their identification). For an animated version of the figure with a large-scale visualization of the streamer, see https://cloud.univ-grenoble-alpes.fr/s/ZNwHrbWg8A24Trb.