Summary of HCO⁺J = 4−3 line emission in HD 34282. We show the integrated intensity (moment 0, left panel), intensity-weighted velocity (moment 1, 2ndpanel), peak intensity (moment 8, 3rdpanel) and the collapsed emission line (right panel). Each moment map was made using a 3σ cutoff and imaged using Briggs weighting. Overplotted in the three left panels are continuum contours with [5, 15 and 100] times the rms value of the continuum emission. The beam is shown in orange in the bottom left of each panel. The grayshaded area in the right panel denotes the + and –3σ level calculated outside the line boundaries.