Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.3501g&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #35.01; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
The interstellar ices and the icy planets and satellites of the Solar System are exposed to ultraviolet and particle irradiation from various sources, driving a non-thermal chemistry. Mid-IR (λ = 2.5-25μm) laboratory spectroscopic studies of ice analogs indicate a complex series of chemical reactions can take place in these environments, but there is a dearth of spectroscopic analyses that have included laboratory spectra of photolyzed ices. Since our experimental equipment has the ability to take both near-IR (λ = 1.0-2.5μm) and mid-IR spectra of the same ice sample, we are able to combine both techniques for maximal information. The goal of the laboratory study described here is to create thick (10-100μm) UV-photolyzed ices by various methods, which will be described. A new, closed-cell technique that allows UV photolysis within the cell will be described and preliminary results of this technique will be shown. Although the focus of this work is toward icy environments within the solar system, it does have bearing on the near-infrared spectra of interstellar materials, which have appeared in the recent literature. Both environments will be discussed. This material is based upon work supported by the National Aeronautics and Space Administration under Grant No. NNG05GG95G issued through the Outer Planets Research Program.
Gerakines Perry A.
Richey C. R.
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