1. The Submillimeter Rotational Spectrum of Ethylene Glycol up to 890 GHz and Application to ALMA Band 10 Spectral Line Data of NGC 6334I
- Author
-
Filippo Tamassia, Crystal L. Brogan, Brett A. McGuire, Mattia Melosso, Luca Dore, Todd R. Hunter, Melosso M., Dore L., Tamassia F., Brogan C.L., Hunter T.R., and McGuire B.A.
- Subjects
010304 chemical physics ,Spectrometer ,Methods: laboratory: molecular ,Terahertz radiation ,Chemistry ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,ISM: molecule ,010402 general chemistry ,01 natural sciences ,Astrophysics - Astrophysics of Galaxies ,Spectral line ,0104 chemical sciences ,Wavelength ,chemistry.chemical_compound ,Astrophysics of Galaxies (astro-ph.GA) ,0103 physical sciences ,Rotational spectrum ,Physical and Theoretical Chemistry ,Physics::Chemical Physics ,Ethylene glycol ,Astrophysics::Galaxy Astrophysics ,Line (formation) - Abstract
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., accepted in the Journal of Physical Chemistry A
- Published
- 2020