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Title:Accurate laboratory measurements of vibration-rotation transitions of 36ArH+ and 38ArH+
Author(s):Domenech, Jose Luis
Contributor(s):Tanarro, Isabel; Herrero, Victor Jose; Cernicharo, Jose; Cueto, Maite
Subject(s):Mini-symposium: Astronomical Molecular Spectroscopy in the Age of ALMA
Abstract:The protonated Ar ion $^{36}$ArH$^+$ has recently been identified in space,\footnote{Barlow et al., Science, 342, 1343 (2013)} in the Crab Nebula, from Herschel spectra. Its R(0) and R(1) transitions lie at 617.5 and 1234.6 GHz, respectively, where atmospheric transmission is rather poor, even for a site as good as that of ALMA. As an alternative, especially after the end of the Herschel mission, rovibrational transitions of ArH$^+$ could be observed in absorption against bright background sources such as the galactic center, or other objects. We report on accurate laboratory wavenumber measurements of 19 lines of the $v=1-0$ band of $^{36}$ArH$^+$ and $^{38}$ArH$^+$, using a hollow cathode discharge cell, a difference frequency laser spectrometer and Ar with natural isotopic composition. Of those lines, only eight had been reported before and with much less accuracy.\footnote{R.R. Filgueira and C.E. Blom, J. Mol. Spectrosc., 127, 279 (1988)} The data have also been used in a Dunham-type global fit of all published laboratory data (IR and sub-mm) of all isotopologues.\footnote{M. Cueto et al, Astrophys. J. Lett, 783, L5 (2014)}
Issue Date:2014-06-17
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:Domenech, J.L.; Tanarro, I.; Herrero, V.J.; Cernicharo, J.; Cueto, M. ACCURATE LABORATORY MEASUREMENTS OF VIBRATION-ROTATION TRANSITIONS OF 36ArH+ and 38ArH+. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.TF03
Genre:Conference Paper / Presentation
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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