Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 447, Issue 4, Pages 4004-4017Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu2709
Keywords
astrochemistry; ISM: abundances; ISM: clouds; ISM: molecules
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Funding
- French CNRS/INSU programme PCMI
- ERC Starting Grant (3DICE) [336474]
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Recent observations have revealed the existence of complex organic molecules (COMs) in cold dense cores and pre-stellar cores. The presence of these molecules in such cold conditions is not well understood and remains a matter of debate since the previously proposed 'warm-up' scenario cannot explain these observations. In this paper, we study the effect of Eley-Rideal and complex induced reaction mechanisms of gas-phase carbon atoms with the main ice components of dust grains on the formation of COMs in cold and dense regions. Based on recent experiments, we use a low value for the chemical desorption efficiency (which was previously invoked to explain the observed COM abundances). We show that our introduced mechanisms are efficient enough to produce a large amount of COMs in the gas phase at temperatures as low as 10 K.
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