Fig. 4
The grayscale with thin contours shows the integrated 13CO(2–1) emission toward the southwestern region R2. Contour levels start at 2 K km s-1 and continue in 1 K km s-1 steps. The thick contours outline the extinction from Kainulainen et al. (2009) in 1 mag steps starting at an Av of 2 mag. A linear scale-bar is shown in the bottom-right corner.
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