期刊
ASTROPHYSICAL JOURNAL
卷 777, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/777/2/90
关键词
astrochemistry; circumstellar matter; ISM: abundances; ISM: clouds; ISM: molecules; stars: formation
资金
- Leverhulme Trust
- EPSRC [EP/F067496]
- European Community [238258]
- Science and Technology Facilities Council [ST/H001794/1, ST/F501761/1, ST/J001511/1] Funding Source: researchfish
- STFC [ST/F501761/1, ST/J001511/1, ST/H001794/1] Funding Source: UKRI
Glycolaldehyde, the simplest monosaccharide sugar, has recently been detected in low- and high-mass star-forming cores. Following our previous investigation into glycolaldehyde formation, we now consider a further mechanism for the formation of glycolaldehyde that involves the dimerization of the formyl radical, HCO. Quantum mechanical investigation of the HCO dimerization process upon an ice surface is predicted to be barrierless and therefore fast. In an astrophysical context, we show that this mechanism can be very efficient in star-forming cores. It is limited by the availability of the formyl radical, but models suggest that only very small amounts of CO are required to be converted to HCO to meet the observational constraints.
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