Left: moment zero of the ¹²CO(3−2) integrated from −15 to 20 km s^-1. Contours start at 5σ with 20σ steps. Middle: moment zero of the ¹³CO(3−2) integrated from −15 to 20 km s^-1. Contours start at 5σ with 5σ steps. Right: continuum map. Contours start at 5σ with 20σ steps. Noise level at 1σ is indicated in the upper right corner of each panel; the unit is mJy/beam km s^-1 in the two left panels and mJy/beam in the right panel. The black ellipses on the three panels represent the FWHM intensity contours. White hatched ellipses represent the clean beam FWHM.