Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apjs..144..277f&link_type=abstract
The Astrophysical Journal Supplement Series, Volume 144, Issue 2, pp. 277-286.
Astronomy and Astrophysics
Astronomy
19
Ism: Molecules, Molecular Data, Molecular Processes, Radio Lines: Ism
Scientific paper
Ethyl methyl ether (C2H5OCH3) has been tentatively detected in hot cores, which are quiescent high-density sources associated with regions of high-mass star formation. Up to now, the only published laboratory rotational-torsional transitions for this molecule lie at frequencies under 35 GHz. In this paper, we report the measurement and assignment of many rotational-torsional transitions of ethyl methyl ether in its vibrational-torsional ground state at frequencies through 350 GHz. A fit to experimental accuracy of over 1000 new and previously assigned transitions has allowed us to predict the frequencies of many additional transitions up to 400 GHz. The results of this work should enable astronomers to confirm the existence of ethyl methyl ether in interstellar sources.
de Lucia Frank C.
Fuchs Ulrike
Groner Peter
Herbst Eric
Winnewisser Gisbert
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