NOEMA data. Upper panels: the color maps reproduce the emission of the CH₃ CN J_K = 12₅–11₅ (left) and CH₂CO 11_1,11–10_1,10 (right) lines. In the upper right corner of the panel, the channel V_LSR (in kilometer per second) and the range of plotted values (in milliJansky per beam) are reported. The white contours reproduce the 1.37 mm continuum, with the same levels as in Fig. 7: the positions of the two nearby 1.37 mm peaks are denoted using the same labels as in Beuther et al. (2018, see Table 5), namely, 1 and 3 for the primary and secondary peak, respectively. Right panel: the blue segment connects the two peaks. In the two panels, the black contours delimit the integration areas used to produce the spectra toward cores 1 and 3, presented in the lower panel. Lower panel: spectra of the CH₃ CN J_K = 12₅–11₅ line toward core 1 (blue histogram) and the CH₂CO 11_1,11–10_1,10 line toward core 3 (red histogram). The flux scales for the CH₃CN and CH₂CO spectra are reported on the left and right, vertical axes, respectively. The blue and red dashed vertical lines indicate the approximateV_LSR of the cores 1 and 3, respectively.