Accurate laboratory measurements of vibration-rotation transitions of 36ArH+ and 38ArH+

Domenech, Jose Luis

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https://hdl.handle.net/2142/50811 Copy

Description

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

Issue Date

2014-06-17

Keyword(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)}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50811

DOI

https://doi.org/10.15278/isms.2014.TF03

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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