Pixel-by-pixel temperature (left) and total column density (centre) maps of the extended H₂ emission in the surroundings of HK Tau B, compared to the S(1) moment 0 map (right). The maps are centred at the location of HK Tau A, marked by the yellow star, and the black star represents the location of HK Tau B. The white contours represent the extent of the ALMA continuum emission as in Figure 4. The bottom row shows the rotational diagram at each of the four locations marked in the S(1) moment 0 map by the coloured squares.