CH₃OH ﹩{J}_{{K}_{a},{K}_{c}}={18}_{\mathrm{3,15}}-{17}_{\mathrm{4,14}}\,A,{v}_{t}=0﹩ moment maps. (a) Zeroth-order moment map. The blue and red lines mark the position of the north and south spiral-like features, respectively. The arrow marks the direction of the pv map in Figure 3(a) and corresponds to the line crossing all three continuum structures (PA = 125°). (b) First-order moment map. (c) Second-order moment map. The continuum is shown in contours with the same levels as in Figure 1, and the continuum peaks are marked with green triangles. The beam size ellipse is shown in the lower left corner.