Abstract
The bright-rimmed molecular cloud around S140 IRS has been mapped in the CS (J = 1-0) emission with an angular resolution of 33''. The relation between the CS emission and the distance from the ionization front is discussed, based on the position of the optical rim determined from an H..cap alpha.. photograph. The CS intensity decreases rapidly like a step function toward the rim. The step lies 40'' away from the optical rim. The distribution of the CS emission in the vicinity of S140 IRS shows a barlike east-west elongation which is prominent at V/sub LSR/ = -6 km s/sup -1/, and an archlike structure clearly seen at V/sub LSR/ = -8 km s/sup -1/.
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