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

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

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.353...59f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 353, Issue 1, pp. 59-68.

Astronomy and Astrophysics

Astronomy

21

Astrochemistry, Line: Identification, Molecular Data, Methods: Laboratory, Ism: Lines And Bands, Infrared: Ism

Scientific paper

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 2152cm-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.

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