Average radial distribution of C×O (red curve) and Si×O (green) from the axis of the torus-like structure at day 9875 for models N16.3, B18.3, and S19.8. Symbols indicate the extension of the C×O (red stars) and Si×O (green stars) structures at 50% of the peak of the profiles; vertical dashed lines show the maximum extension of CO (red) and SiO (green) inferred from ALMA observations (Abellán et al. 2017).