Using laboratory studies of CO-H2O ices to understand the non-detection of a 2152/cm (4.647 k m) band in the spectra of interstellar ices

We present results from laboratory experiments on layered CO-H2O-ice systems, carried out from sub-monolayer to multilayer CO coverages, and review recent experimental data, as published by the authors. Under certain specific laboratory conditions the 2152/cm feature, associated with CO molecules ad...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2004-09, Vol.353 (1), p.59-68
Main Authors: Fraser, H J, Collings, M P, Dever, J W, Mccoustra, M R
Format: Article
Language:English
Online Access:Get full text
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Summary:We present results from laboratory experiments on layered CO-H2O-ice systems, carried out from sub-monolayer to multilayer CO coverages, and review recent experimental data, as published by the authors. Under certain specific laboratory conditions the 2152/cm feature, associated with CO molecules adsorbed at dangling-OH bonds at the ice surface, is 'missing'. A detailed analysis is used to understand why the same feature is not detected in spectra of interstellar ices. We conclude that the dangling-OH sites do exist in interstellar ices but that the sites are blocked by another species. The astronomical implications of this deduction are discussed.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2004.08038.x