Channel maps of the CH₃OH red- and blue-shifted emission. Each panel shows the emission shifted in velocity with respect to the systemic velocity (+8.5 km s⁻¹, Podio et al. 2021) by the value given in the upper right corner. As the methanol emission is due to the blending of the different components, the figure shows the red-shifted emission of the 2_1,2−1_1,1 E (upper panels), and the blue-shifted emission of the 2_1,2−1_1,1 A (lower panels). In grey scale (and black contour) the 3 mm continuum image (Fig. 1) is shown. First contours and steps are 3σ (6 mJy beam⁻¹). The positions of the A, VLA3, and B continuum peaks are marked by white stars (Table 2). The synthesised beams are shown in the bottom-left, while the dashed circles delimitate the FoV (Table 1).