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THz time-domain spectroscopy of mixed CO_2-CH_3OH interstellar ice analogs

McGuire, Brett A. and Ioppolo, Sergio and Allodi, Marco A. and Blake, Geoffrey A. (2016) THz time-domain spectroscopy of mixed CO_2-CH_3OH interstellar ice analogs. Physical Chemistry Chemical Physics, 18 (30). pp. 20199-20207. ISSN 1463-9076. PMCID PMC6842323.

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The icy mantles of interstellar dust grains are the birthplaces of the primordial prebiotic molecular inventory that may eventually seed nascent solar systems and the planets and planetesimals that form therein. Here, we present a study of two of the most abundant species in these ices after water: carbon dioxide (CO_2) and methanol (CH_3OH), using TeraHertz (THz) time-domain spectroscopy and mid-infrared spectroscopy. We study pure and mixed-ices of these species, and demonstrate the power of the THz region of the spectrum to elucidate the long-range structure (i.e. crystalline versus amorphous) of the ice, the degree of segregation of these species within the ice, and the thermal history of the species within the ice. Finally, we comment on the utility of the THz transitions arising from these ices for use in astronomical observations of interstellar ices.

Item Type:Article
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URLURL TypeDescription Information CentralArticle Paper
McGuire, Brett A.0000-0003-1254-4817
Ioppolo, Sergio0000-0002-2271-1781
Allodi, Marco A.0000-0002-3289-1659
Blake, Geoffrey A.0000-0003-0787-1610
Alternate Title:THz time-domain spectroscopy of mixed CO2-CH3OH interstellar ice analogs
Additional Information:© 2016 the Owner Societies. Received 28th January 2016, Accepted 1st June 2016, First published online 07 Jun 2016. This article is part of themed collection: Prebiotic chemistry and the molecular origins of life. The authors thank P. Carroll, I. Finneran, and M. Kelley for their assistance with spectrometer development. B. A. M. thanks A. Remijan for his support. The authors thank the anonymous referee for a detailed reading of the manuscript which significantly improved the quality of the work. S. I. acknowledges funding through a Marie Curie Fellowship (FP1-PEOPLE-2011-IOF-300957) and recent support by the Royal Society. M. A. A. acknowledges current support from a Yen Postdoctoral Fellowship from the Institute for Biophysical Dynamics at the University of Chicago. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Funding AgencyGrant Number
Marie Curie FellowshipFP1-PEOPLE-2011-IOF-300957
University of ChicagoUNSPECIFIED
Issue or Number:30
PubMed Central ID:PMC6842323
Record Number:CaltechAUTHORS:20160617-090511707
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Official Citation:THz time-domain spectroscopy of mixed CO2–CH3OH interstellar ice analogs Brett A. McGuire, Sergio Ioppolo, Marco A. Allodi and Geoffrey A. Blake Phys. Chem. Chem. Phys., 2016,18, 20199-20207 DOI: 10.1039/C6CP00632A
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68468
Deposited By: Tony Diaz
Deposited On:17 Jun 2016 17:15
Last Modified:09 Mar 2020 13:18

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