Publication: Detection of HCO+ towards Cygnus OB2 No. 12
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Date
2000
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Oxford University Press (OUP)
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Scappini, F., C. Cecchi-Pestellini, C. Codella, and A. Dalgarno. 2000. “Detection of HCO+ Towards Cygnus OB2 No. 12.” Monthly Notices of the Royal Astronomical Society 317 (1) (September 1): L6–L10. doi:10.1046/j.1365-8711.2000.03799.x.
Abstract
HCO+ has been detected for the first time towards the star Cygnus OB2 No. 12 through emission of the 1−0 rotational transition at 89GHz. The CO(J=2−1) transition has also been observed. The observations are consistent with a model of dense regions embedded in a low-density clump gas. If actually present, the dense component would have an aggregate size L⩾1300au, in agreement with estimates of small-scale density fluctuations observed along diffuse lines of sight.
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stars: individual: Cygnus OB2 No. 12, ISM: abundances, ISM: clouds, ISM: molecules
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