Channel maps in the ¹²CO(2–1) line obtained by combining single-dish (IRAM 30-m) and interferometric (SMA) data. The number in the top left of each panel gives the corresponding LSR velocity. The values of the contour levels are indicated by the tick marks in the intensity scale to the right. The ellipse in the bottom right of the last panel is the full-width-at-half power of the resulting instrumental beam.