e-MERLIN and ALMA observations toward the nuclear region of Zw049.057. (a) e-MERLIN C band continuum contour map. Contour levels: [−1, 1, 3, 30, 60, 120, 240, 360,…]σ, with σ = 3.56 × 10⁻⁵ Jy/beam. The dashed contour corresonds to −1σ. (b,c) H₂CO 4.83 GHz emission moment 0 (b) and 1 (c) map overlaid (b) with C Band continuum emission contour map. (d) e-MERLIN L Band continuum emission contour map. Contour levels: [−1, 1, 3, 6, 12, 24, 48, 96, 384,…]σ, with σ = 7.70 × 10⁻⁶ Jy/beam. (e,f,g) OH megamaser emission (1.667 GHz) moment maps (e, moment 0; f, moment 1; g, square root of the moment 2). Images are overlaid with L band continuum emission contours. (h,i) Moment 0 (h) and moment 1 (i) maps of the HCN J = 3 → 2 emission. In (h), negative emission yields (absorption) are put to zero. Red line and white mark in (h) indicate the slice and center of the p-v diagram shown in (j). (k) Integrated intensity of HCN high-velocity wings. Integration performed between velocities ±250 − ±750 km s⁻¹ (blue/red). Contour levels: [3, 4, 5, …]×33 mJy/beam km s⁻¹. (l) juxtaposition of the moment 0 maps of H₂CO (red) and OH (blue) emission. Directions of the radio-jet (PA_jet = 130°), CO outflow (PA_CO = 105°), and disk major axis (PA_maj = 30°) are indicated by the dashed black line, solid black line, and solid green line, respectively. Direction of the extended feature in the L-band continuum (PA_L = 120°) is indicated by the dash-dotted red line. Spatial offsets of line emission maps are with respect to position of L band continuum maximum. Fitted beams are shown in the lower-left corner of the image.