Ethyl alcohol and sugar in comet C/2014 Q2 (Lovejoy)
作者： Nicolas Biver , Dominique Bockelée-Morvan , Raphaël Moreno , Jacques Crovisier , Pierre Colom
关键词: Comet 、 Protostar 、 Physics 、 Methanol 、 Solar System 、 Astrobiology 、 Glycolaldehyde 、 Planetesimal 、 Star formation 、 Photochemistry 、 Protoplanetary disk
摘要: The presence of numerous complex organic molecules (COMs; defined as those containing six or more atoms) around protostars shows that star formation is accompanied by an increase molecular complexity. These COMs may be part the material from which planetesimals and, ultimately, planets formed. Comets represent some oldest and most primitive in solar system, including ices, are thus our best window into volatile composition protoplanetary disk. Molecules identified to present cometary ices include water, simple hydrocarbons, oxygen, sulfur, nitrogen-bearing species, well a few COMs, such ethylene glycol glycine. We report detection 21 comet C/2014 Q2 (Lovejoy), first identification ethyl alcohol (ethanol, C2H5OH) simplest monosaccharide sugar glycolaldehyde (CH2OHCHO) comet. abundances ethanol glycolaldehyde, respectively 5 0.8% relative methanol (0.12 0.02% water), somewhat higher than values measured solar-type protostars. Overall, high abundance supports through grain-surface reactions system
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