Emission of the SO₂ 18_4,14–18_3,15 line. Left: spectrum rebinned by a factor of 4, integrated over a circular region with r = 0″.2, and centered on the continuum peak position. Center, moment 0 map above 3σ (color scale), integrated over 60 km s⁻¹, and continuum emission (black contours), starting at 20σ and following steps of 40σ. Right: moment 1 map (color scale) and moment 0 map (white contours) above 3σ. The blue and red arrows show the direction of the outflow from van der Marel et al. (2013), the yellow star indicates the continuum peak position, and the synthesized beam is represented by the black filled ellipse in the bottom right corner. The adopted systemic velocity is 3.7 km s⁻¹.