Results of the modelling showing the channel maps for the transition (from left to right) ¹²CO J = 2 → 1, ¹³CO J = 2 → 1 (NOEMA) and ¹²CO J = 3 → 2 (ALMA). In each sub-panel, we present from left to right: the observations, the model (see best-fit parameters in Table 4), and the residual emission. The latter is obtained by subtraction in the u, v plane before imaging and cleaning. Contour spacing is 5σ for the ¹²CO transitions (σ = 16 mJy beam⁻¹ for J = 2 → 1 and σ = 6.3 mJy beam⁻¹ for J = 3 → 2), and 3σ for the ¹³CO J = 2 → 1 transition (σ = 10 mJy beam⁻¹). Residual contour spacing is 3σ for all transitions.