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.

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About

• Item ORO ID
• 37304
• Item Type
• Journal Item
• ISSN
• 1365-2966
• Keywords
• astrochemistry; molecular data; lines and bands – infrared
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2004 RAS
• Depositing User
• Stephen Serjeant