[C II] 158-μm observations and modelling of J1000+0234. Top left panel: HST WFC3 F160W image with the [C II] 158-μm total-flux map contours overlaid. Top middle panel: total-flux map (green shapes and black contours) of the [C II] emission; the lowest contour is at about 3 times the rms noise in this map, and the other contours are at 2, 4, and 8 times this level. In red we show the outer contour of the total-flux map of the best-fit model obtained with ^3DBAROLO (convoluted with the observational beam, shown in the bottom right corner). Top right panel: velocity (weighted-mean) field of the [C II] 158-μm line. Bottom left panel: position-velocity diagram along the kinematic major axis of the galaxy (grey line overlaid on the velocity field); the data are in green shades and contours, while the ^3DBAROLO model is in red contours. Contour levels are at −2, 2, 4, and 8 times the rms noise per channel. Bottom centre panel: position-velocity diagram along the kinematic minor axis of the galaxy displayed analogously to the major-axis plot. Bottom right panel: velocity (weighted-mean) field of the best-fit ^3DBAROLO model.