The Sub-millimeter Rotational Spectrum of Ethylene Glycol up to 890 GHz and Application to ALMA Band 10 Spectral Line Data of NGC 6334I. (arXiv:1912.01472v1 [astro-ph.GA])

The Sub-millimeter Rotational Spectrum of Ethylene Glycol up to 890 GHz and Application to ALMA Band 10 Spectral Line Data of NGC 6334I. (arXiv:1912.01472v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Melosso_M/0/1/0/all/0/1">Mattia Melosso</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dore_L/0/1/0/all/0/1">Luca Dore</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tamassia_F/0/1/0/all/0/1">Filippo Tamassia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Brogan_C/0/1/0/all/0/1">Crystal L. Brogan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hunter_T/0/1/0/all/0/1">Todd R. Hunter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McGuire_B/0/1/0/all/0/1">Brett A. McGuire</a>

The rotational spectrum of the most stable conformer of ethylene glycol
(HO(CH$_2$)$_2$OH) has been recorded between 360-890 GHz using a
frequency-modulation sub-millimeter spectrometer. The refinement and extension
of the spectroscopic parameters over previous efforts provides predicted
catalog frequencies for ethylene glycol with sufficient accuracy for comparison
to high-frequency astronomical data. The improvement in the cataloged line
positions, and the need for improved accuracy enabled by high-frequency
laboratory work, is demonstrated by an analysis of ethylene glycol emission at
890 GHz in the high-mass star-forming region NGC 6334I in ALMA Band 10
observations. The need for accurate rotational spectra at sub-millimeter
wavelengths/THz frequencies is discussed.

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