Comparison between observed and simulated ¹²CO and ¹³CO maps for the HD142527 disc. The top and bottom panels show the ¹²CO and ¹³CO J = 2 − 1 emission, respectively. The left panels are the observations (Garg et al. 2021). The middle and right panels are synthetic emissions predicted from the simulations. The middle panels are from the simulation shown in the left panel of Fig. 4 which uses the disc and binary set-up as the R2 orbit in Price et al. (2018a). The right panels are from the simulations shown in the right panel of Fig. 4, which uses the updated binary parameters in Table 3. In general, the new binary orbit results in a lack of substructure in either molecule. Additionally, the lack of a cavity in ¹³CO further highlights that the companion alone cannot reproduce the disc features.