Fig. 11

Top: channel maps of the APEX 13CO(2–1) observations in the northern map. The contours indicate the Herschel column densities
= 2 × 1021, 3.5 × 1021 and 5 × 1021 cm−2. The velocityof the channel is indicated in red at the upper left corner of every channel. It can be seen that the velocities of the blueshifted shoulder trace the strands. Bottom: same for the southern map.
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