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ALMA Detection of Interstellar Methoxymethanol (CH\\(_3\\)OCH\\(_2\\)OH)
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ALMA Detection of Interstellar Methoxymethanol (CH\\(_3\\)OCH\\(_2\\)OH)
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Paper
ALMA Detection of Interstellar Methoxymethanol (CH\\(_3\\)OCH\\(_2\\)OH)
2017
Overview
We report the detection of interstellar methoxymethanol (CH\\(_3\\)OCH\\(_2\\)OH) in ALMA Bands 6 and 7 toward the MM1 core in the high-mass star-forming region NGC 6334I at ~0.1\" - 1\" spatial resolution. A column density of 4(2) x \\(10^{18}\\) cm\\(^{-2}\\) at \\(T_{ex}\\) = 200 K is derived toward MM1, ~34 times less abundant than methanol (CH\\(_3\\)OH), and significantly higher than predicted by astrochemical models. Probable formation and destruction pathways are discussed, primarily through the reaction of the CH\\(_3\\)OH photodissociation products, the methoxy (CH\\(_3\\)O) and hydroxymethyl (CH\\(_2\\)OH) radicals. Finally, we comment on the implications of these mechanisms on gas-phase vs grain-surface routes operative in the region, and the possibility of electron-induced dissociation of CH\\(_3\\)OH rather than photodissociation.
Publisher
Cornell University Library, arXiv.org
Subject
