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Laboratory Spectra of CO2 Vibrational Modes in Planetary Ice AnalogsLaboratory spectra have shown that CO2 is a powerful diagnostic tool for analyzing infrared data from remote observations, as it has been detected on icy moons in the outer Solar System as well as dust grain surfaces in the interstellar medium (ISM). IR absorption band profiles of CO2 within ice mixtures containing H2O and CH3OH change with respect to temperature and mixture ratios. In this particular study, the CO2 asymmetric stretching mode near 4.3 m (2350 cm (exp-1)), overtone mode near 1.97 m (5080 cm (exp-1)), and the combination bands near 2.7 m (3700 cm (exp-1)), 2.8 m (3600 cm (exp-1)), and 2.02 m (4960 cm (exp -1)), are systematically observed in different mixtures with H2O and CH3OH in temperature ranges from 15K to 150 K. Additionally, some high-temperature deposits (T greater than 50 K) of H2O, CH3OH, and CO2 ice mixtures were performed. These data may then be used to interpret infrared observational data obtained from icy surfaces in the outer Solar System and beyond.
Document ID
20120016605
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
White, Douglas
(Oak Ridge Associated Universities Moffett Field, TN, United States)
Mastrapa, Rachel M.
(Search for Extraterrestrial Intelligence Inst. Mountain View, CA, United States)
Sandford, Scott
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 26, 2013
Publication Date
August 8, 2012
Publication Information
Publication: Icarus
Volume: 221
Issue: 2
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
ARC-E-DAA-TN5773
Funding Number(s)
CONTRACT_GRANT: NNH06CC03B
CONTRACT_GRANT: NNX10AQ70A
WBS: WBS 811073.02.07.02.54
Distribution Limits
Public
Copyright
Public Use Permitted.
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