Moment maps of CH₃CN and isotopologs. Top panels: Overlay of the ALMA 1.4 mm continuum emission (contours) on the integrated intensity (moment 0) map (colors) of CHCN K = 3 (E_up ∕k_B = 142 K), CH₃CN K = 8 (E_up ∕k_B = 526 K), and CH₃CN K, l = (6, 1) v₈ = 1 (E_up ∕k_B = 778 K) (12–11). Thecontours correspond to the 3σ and 50% levels. Middle panels: Line velocity (moment 1) maps for the same molecular species. Bottom panels: Velocity dispersion (moment 2) maps for the same species. The moment maps have been integrated over the velocity range 92 to 102 km s⁻¹. The white crosses indicate the positions of the NE core and of the four continuum sources embedded in the Main core detected by Beltrán et al. (2021). The synthesized beam is shown in the lower right corner of the top right panel.