[O III]λ5007 Å integrated intensity map in gray scale. Blue and brown contours show the [O III]λ5007 Å and Hα emission (see Sect. 4). The square regions are color-coded according to the central (projected) outflow velocity in the ionized gas phase. Top panel: blueshifted [O III] outflow v_central (projected), and bottom panel: redshifted velocities. The solid and dashed green lines correspond to the direction of the radio jet. The dashed orange lines trace the three main absorption features in the dust structure map of Davies et al. (2014). The feature to the southwest may be associated with outflow rather than inflow.