Left: position-velocity diagram across the north-south direction (PA = 0°). The contours are drawn at 3, 5, 10, 20, and 40σ (where σ is measured over the emission-free channels). Middle: position-velocity diagram across the east-west direction (PA = 90°) showing the brighter and more structured emission on the west side of the stars. Right: position-velocity diagram along the binary axis (PA = 35°) showing the structure within the south-west bright emission (Fig. 1).