Position-velocity diagram on the H₂ 1–0 S(1) emission. Left panel: Velocity channel map of H₂ 1–0 S(1) of ∼400 km s⁻¹. In red we show the path used in the p–v diagram in the right panel. Crosses and the ellipse indicate respectively the nuclei and the high-velocity molecular hydrogen blob positions. Right panel: Position-velocity diagram of the H₂ 1–0 S(1) emission line. Vertical dashed lines indicate the position of the landmarks along the path (S is the southern nucleus, H₂ is the molecular blob, and N is the northern nucleus). The flux is in log scale.