Two examples of clouds of 12CO(3–2) emission that coincide with extended features of H i self absorption. In the left 12CO(3–2) emission maps are shown with corresponding H i images. On the right CO and H i profiles are displayed. These were taken at the positions marked with the asterisks in the images. In the top we show an example for a Cygnus Rift cloud at a velocity of + 5 km s-1. The bottom represents a cloud at low negative velocities connected to DR 21. The images represent a velocity of − 8 km s-1.
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