Segmented chirped-pulse millimeter-wave spectroscopy for astrochemistry

Arenas, Benjamin E.

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https://hdl.handle.net/2142/91308 Copy

Description

Title

Segmented chirped-pulse millimeter-wave spectroscopy for astrochemistry

Author(s)

Arenas, Benjamin E.

Contributor(s)

• Schnell, Melanie
• Gruet, Sébastien
• Steber, Amanda

Issue Date

2016-06-21

Keyword(s)

Astronomy

Abstract

The ability to detect molecules in the interstellar medium (ISM) is afforded to us by the collaboration of state-of-the-art observations, like from the Atacama Large Millimeter/submillimeter Array (ALMA), and high-resolution laboratory spectra. Here, we present our use of a commercial segmented chirped-pulse Fourier transform millimeter-wave rotational spectrometer to study simple oxygen-containing organic molecules. Our spectrometer operates in the region 75 – 110 GHz, providing an overlap with ALMA’s Band 3 and allowing direct comparison of our laboratory spectra with observational data. We have measured rotational spectra of 1,2-propanediol[1, 2, 3] and methyl acetate[4, 5] in this spectral range at room temperature – both have been previously studied in the microwave and millimeter-wave regions. The rotational spectrum of the former in the 3 mm region shows eight different conformers to date. Spectral bandwidth overlap with ALMA Band 3 will allow for easier detection of new chemicals in the ISM. \\ [1] Caminati, W., \textit{J. Mol. Spectrosc.}, 86(1), 193-201, \textbf{1981}. [2] Lovas, F. J., Plusquellic, D. F., Pate, B. H., Neill, J. T., Muckle, M. T. and Remijan, A. J., \textit{J. Mol. Spectrosc.}, 257(1), 82-93, \textbf{2009}. [3] Bossa, J. –B., Ordu, M. H., Müller, H. S. P., Lewen, F. and Schlemmer, S., \textit{Astron. Astrophys.}, 570, A12, \textbf{2014}. [4] Tudorie, M., Kleiner, I., Hougen, J. T., Melandri, S., Sutikdja, L. W. and Stahl, W., \textit{J. Mol. Spectrosc.}, 269, 211-225, \textbf{2011}. [5] Nguyen, H. V. L., Kleiner, I., Shipman, S. T., Mae, Y., Hirose, K., Hatanaka, S. and Kobayashi, K., \textit{J. Mol. Spectrosc.}, 299, 17-21, \textbf{2014}.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

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http://hdl.handle.net/2142/91308

Copyright and License Information

Copyright 2016 by the authors

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