Abstract
The 110−101 transition of H2 18O, has been searched for in several sources without positive detection. However, in NGC 2264 and NGC 7538, possible emission features are suspected. Implications of these features, if confirmed, are discussed. Our best upper limit obtained in Orion (0.9 K) indicates that in that cloud, the water abundance should not be more than 1% that of CO.
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References
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© 1989 Springer-Verlag Berlin Heidelberg
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Wannier, P.G. et al. (1989). Observations of H2 18O at 547 GHz with the Kuiper Airborne Observatory. In: The Physics and Chemistry of Interstellar Molecular Clouds: mm and Sub-mm Observations in Astrophysics. Lecture Notes in Physics, vol 331. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0119488
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DOI: https://doi.org/10.1007/BFb0119488
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