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Title:THz Time-domain spectroscopy of complex interstellar ice analogs
Author(s):Ioppolo, Sergio
Contributor(s):Blake, Geoffrey; Carroll, Brandon; Finneran, Ian; de Vries, Xander; Allodi, Marco A.; McGuire, Brett A.
Abstract:It is generally accepted that complex organic molecules (COMs) form on the icy surface of interstellar grains. Our ability to identify interstellar complex species in the ices is affected by the limited number of laboratory analogs that can be compared to the huge amount of observational data currently coming from international astronomical facilities, such as the Herschel Space Observatory, SOFIA, and ALMA. We have recently constructed a new THz time-domain spectroscopy system to investigate the spectra of interstellar ice analogs in a range that fully covers the spectral bandwidth of the aforementioned facilities (0.3~–~7.5 THz). The system is coupled to a FT-IR spectrometer to monitor the ices in the mid-IR (4000~–~500 cm$^{-1}$). This talk focuses on the laboratory investigation of the composition and structure of the bulk phases of interstellar ice analogs (i.e., H$_{2}$O, CO$_{2}$, CO, CH$_{3}$OH, NH$_{3}$, and CH$_{4}$) compared to more complex molecules (e.g., HCOOH, CH$_{3}$COOH, CH$_{3}$CHO, (CH$_{3}$)$_{2}$CO, HCOOCH$_{3}$, and HCOOC$_{2}$H$_{5}$). The ultimate goal of this research project is to provide the scientific community with an extensive THz ice database, which will allow quantitative studies of the ISM, and potentially guide future astronomical observations of species in the solid phase.
Issue Date:2014-06-17
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:Ioppolo, S.; Blake, G.; Carroll, B.; Finneran, I.; de Vries, X.; Allodi, M.A.; McGuire, B.A. THz TIME-DOMAIN SPECTROSCOPY OF COMPLEX INTERSTELLAR ICE ANALOGS. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.TA02
Rights Information:Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License.
Date Available in IDEALS:2014-09-17

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