J/ApJ/851/L46ivo://CDS.VizieR/J/ApJ/851/L46doi:10.26093/cds/vizier.18519046CDSMcGuire B.A.Shingledecker C.N.Willis E.R.Burkhardt A.M.El-Abd S.,Motiyenko R.A.Brogan C.L.Hunter T.R.Margules L.Guillemin J.-C.,Garrod R.T.Herbst E.Remijan A.J.2018-10-09T09:02:39Z2018-09-11T10:31:35ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsinterstellar-mediummolecular-physicsradio-spectroscopyWe report the detection of interstellar methoxymethanol (CH_3_OCH_2_OH) in Atacama Large Millimeter/submillimeter Array (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)x10^18^cm^-2^ at T_ex_=200K 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 versus grain-surface routes operative in the region, and the possibility of electron-induced dissociation of CH3OH rather than photodissociation.2017ApJ...851L..46Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/851/L46CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/A+A/601/A49 : CH_3_NHCHO rotational spectroscopy (Belloche+, 2017)J/A+A/605/L3 : SOLIS. I. L1157-B1 NH_2_CHO image (Codella+, 2017)J/ApJ/835/46 : methoxy radical (CH_3_O) rotational spectrum (Laas+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/851/L46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/851/L46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/851/L46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/851/L46https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/851/L46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/851/L46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapMillimeterdefaultJ/ApJ/851/L46/table2Line parameters of CH_3_OCH_2_OHrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQNQuantum numbersphys.atmol.qnFreq[239256/351903] Frequency (MHz)MHzem.freq;em.mm.200-400GHzdoubleSiju2[0/2] Strength (Debye^2^)D**2phys.atmol.collStrengthfloatEu[31.6/1883] Upper energy (K)Kphys.energy;stat.maxfloat