Velocity maps of BRI0952 showing [C II] emission across the velocity range of the line. The velocity range is provided at the top of the images. The gray contours are at 10, 20, 30, 40, 50, and 60σ levels from the moment-0 map of BRI0952, which is shown in Fig. 2. The black ellipses indicate the positions and sizes of the two companions from CASA’s IMFIT routine. The southern companion shows a clear velocity gradient across the −157 to −14 km s⁻¹ range. The size of the synthesized beam is shown in the bottom left corner of the images.