The Infrared Band Strengths of H2o, Co and Co2 in Laboratory Simulations of Astrophysical Ice Mixtures

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dc.creatorGerakines, P. A.
dc.creatorSchutte, W. A.
dc.creatorGreenberg, J. M.
dc.creatorvan Dishoeck, Ewine F.
dc.date1994-09-28
dc.date1995-03-14
dc.date.accessioned2026-07-07T08:58:15Z
dc.date.available2026-07-07T08:58:15Z
dc.descriptionInfrared spectroscopic observations toward objects obscured by dense cloud material show that H$_2$O, CO and, likely, CO$_2$ are important constituents of interstellar ice mantles. In order to accurately calculate the column densities of these molecules, it is important to have good measurements of their infrared band strengths in astrophysical ice analogs. We present the results of laboratory experiments to determine these band strengths. Improved experimental methods, relying on simultaneous independent depositions of the molecule to be studied and of the dominating ice component, have led to accuracies better than a few percent. Furthermore, the temperature behavior of the infrared band strengths of CO and H$_2$O are studied. In contrast with previous work, the strengths of the CO, CO$_2$, and H$_2$O infrared features are found to depend only weakly on the composition of the ice matrix, and the reversible temperature dependence of the CO band is found to be weaker than previously measured for a mixture of CO in H$_2$O.
dc.description17 pages uuencoded compressed Postscript file-- includes all 6 figures (replaces most recent posting with only figs 2-5)
dc.identifierhttps://arxiv.org/abs/astro-ph/9409076
dc.identifierhttp://arxiv.org/abs/astro-ph/9409076
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/147253
dc.subjectAstrophysics
dc.titleThe Infrared Band Strengths of H2o, Co and Co2 in Laboratory Simulations of Astrophysical Ice Mixtures
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