Rotation diagram of the H2 lines. Black dots show the model results from non-LTE calculations with line transfer using RADMC-3D. The solid and dashed black lines are a two-component fit to the lower J lines S(1)-S(3) and the higher J lines S(4)-S(9), respectively. Green crosses indicate the values assuming LTE and optically thin emission -i.e., the maximum emission possible within our model setup. For reference, observational data for SY Cha are shown with a blue line (Schwarz et al. 2025a). Since the emitting area is not specified in Arulanantham et al. (2024), the data for Tau 042021 are omitted to avoid introducing additional uncertainties.