Using laboratory studies of CO-H₂O ices to understand the non-detection of a 2152 cm^-1 (4.647 µm) band in the spectra of interstellar ices

Fraser, Helen J.; Collings, Mark P.; Dever, John W. and McCoustra, Martin R. S. (2004). Using laboratory studies of CO-H₂O ices to understand the non-detection of a 2152 cm^-1 (4.647 µm) band in the spectra of interstellar ices. Monthly Notices of the Royal Astronomical Society, 353(1) pp. 59–68.

DOI: https://doi.org/10.1111/j.1365-2966.2004.08038.x

URL: http://mnras.oxfordjournals.org/content/353/1/59.f...

Abstract

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⁻¹ 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.

Viewing alternatives

Metrics

Item Actions

Export

You can export this page using these formats Digital Object Identifier - DOI