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Laboratory Spectra of CO2 Vibrational Modes in Planetary Ice Analogs
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External Online Source: doi:10.1016/j.icarus.2012.10.024
Author and Affiliation:
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)
Abstract: Laboratory 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.
Publication Date: Aug 08, 2012
Document ID:
20120016605
(Acquired Dec 07, 2012)
Subject Category: LUNAR AND PLANETARY SCIENCE AND EXPLORATION
Report/Patent Number: ARC-E-DAA-TN5773
Document Type: Preprint
Publication Information: Icarus; Volume 221; Issue 2; 1032-1042
Contract/Grant/Task Num: NNH06CC03B; NNX10AQ70A; WBS 811073.02.07.02.54
Financial Sponsor: NASA Ames Research Center; Moffett Field, CA, United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 11p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CARBON DIOXIDE; INFRARED SPECTROSCOPY; ICE; ANALOGS; PLANETARY COMPOSITION; VIBRATION MODE; WATER; INFRARED ABSORPTION; ASYMMETRY; BINARY MIXTURES; HIGH TEMPERATURE; INTERSTELLAR MATTER
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