Panel a: map of the zero moment (integrated intensity; contours) of the CH₃ OH(4₂–3₁) E1 line overlaid on the map (color image) of the first moment of the same transition. Contour levels range from 0.05 to 1.25 in steps of 0.2 Jy beam⁻¹ km s⁻¹. The ellipse in the bottom right represents the synthesized beam. The dashed line has the same meaning as in Fig. 6. Panel b: same as top panel, but for the second moment of the methanol line.