We have investigated, in the 13CO(1–0) line, the region between the stars Cyg OB2 No. 5 and No. 12. The integrated intensity contour map reveals the existence of a condensation at 12 km s−1 (core C), north-west of Cyg OB2 No. 5, with a core–halo structure. The morphology and the derived physical parameters make it quite similar to core A, previously discovered towards Cyg OB2 No. 12. A second condensation at 7 km s−1, near Cyg OB2 No. 12, has been mapped in the same line (1–0) of 13CO. A summary of different observations, in all spectral regions, towards Cyg OB2 No. 5 and No. 12 is presented to provide the material for a further comprehensive discussion of this intricate and still intriguing region.
The diffuse clouds towards Cyg OB2 No. 5 and No. 12
CASU, SILVIA;
2005-01-01
Abstract
We have investigated, in the 13CO(1–0) line, the region between the stars Cyg OB2 No. 5 and No. 12. The integrated intensity contour map reveals the existence of a condensation at 12 km s−1 (core C), north-west of Cyg OB2 No. 5, with a core–halo structure. The morphology and the derived physical parameters make it quite similar to core A, previously discovered towards Cyg OB2 No. 12. A second condensation at 7 km s−1, near Cyg OB2 No. 12, has been mapped in the same line (1–0) of 13CO. A summary of different observations, in all spectral regions, towards Cyg OB2 No. 5 and No. 12 is presented to provide the material for a further comprehensive discussion of this intricate and still intriguing region.
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