Observations compared with simulations for the streamlines in the NE region. Dots, triangles, and squares have the same meaning as in Fig. 4. The black curves are the plane-of-the-sky projection of the simulated DW streamlines for the masers in the NE region. Two slightly different launch radii of 4 (upper panel) and 4.5 au (lower panel) are used to reproduce the NE-3 (squares) and NE-2 (triangles) streams, respectively. We note that the observations are rotated 50° clockwise so as to align the jet axis with the vertical axis.