Fig. 6
4C 31.04: contours show continuum, the lowest contour is at 5 mJy beam-1 with subsequent contours increasing by factors of 2. Grayscale shows the mean opacity over the rest frame velocity range −174 km s-1 to + 138 km s-1. The beam FWHM is indicated in the lower right corner. The dashed line indicates the location of the position–velocity slice presented in Fig. 8.
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