¹²CO integrated emission and PV diagrams. Left panels: moment 0 maps of the ¹²CO emission (within ± 5 km s⁻¹ from the systemic velocity) overlaid with the orientation and width of each PV cut. The maps were convolved with a 2D Gaussian to 5 au resolution to improve the S/N. Right panels: PV diagrams for ¹²CO along the different cuts shown in the left panels. Contours are at 3σ. In the upper right panel, green and red dashed lines denote pure free-fall and Keplerian rotational velocities towards/around a 0.05 M_⊙ protostar, respectively. An example of a 2D Gaussian fit (see Sect. 4.4) to the emission is indicated by the cyan ellipse. Note the change in scale from top to bottom rows.