SEST observations. 12CO(1–0) line emission integrated over velocity intervals of 1 km s-1 between 6 and 12 km s-1. Lowest contour level and step are 1 K km s-1. The observed positions are indicated in the lower panel. This panel also indicates the area observed with the SEST in 13CO(1–0). The filled circles indicate the positions of the candidate emission-line stars, which are labelled with their numbers as in Table 1. Offsets as in Fig. 2.
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