¹²CO J = 3−2 (ALMA Band 7) synthetic channel intensity maps for CS Cha companion models. The grey cross indicates the central target location. The white ellipse in each panel shows the beam with a size of 0.11′′ × 0.09′′. In the top right corner of each panel the velocity relative to the systemic velocity is indicated. The grey and black contours show 3 and 5 times the theoretical rms level of 0.65 mJy beam⁻¹ (see Table C.1). Top row: same model as in Fig. 9 (Sect. 3.5) for easier comparison. Second and third rows: models where only the PMC mass was changed. Last two rows: the disk outer radius was adapted to r_Hill∕3 according to the PMC mass. The spatial and colour scale are the same for all five plots.