Modelling complex organic molecules in dense regions: Eley–Rideal and complex induced reaction

2014/12/19 by Maxime Ruaud, M. Ruaud, Jean‐Christophe Loison +7 · 6 citations
Chemical Engineering · Chemistry · Physics and Astronomy · #Adsorption #Advanced Combustion Engine Technologies #Astrobiology #Astrochemistry #Astrophysics #Astrophysics and Star Formation Studies #Chemical physics #Chemistry #Desorption #Galaxy #Gas phase #Interstellar medium #Molecular Spectroscopy and Structure #Molecule #Organic molecules #Phase (matter) #Physical chemistry #Physics #Thermodynamics #astro-ph.GA #astro-ph.SR

paper · pdf · doi:10.1093/mnras/stu2709

14 pages, 12 figures, 8 tables

arxiv created 2014/12/19 · openalex publication_date 2015/01/29 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Recent observations have revealed the existence of Complex Organic Molecules (COMs) in cold dense cores and prestellar 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 article, 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 complex organic molecules in the gas-phase at temperatures as low as 10K.

Citations

• Polycyclic Aromatic Hydrocarbons in Dense Cloud Chemistry
• Chemical Kinetic Data Base for Combustion Chemistry. Part I. Methane and Related Compounds
• Near-Arcsecond Resolution Observations of the Hot Corino of the Solar-Type Protostar IRAS 16293-2422
• Non-thermal desorption from interstellar dust grains via exothermic surface reactions
• Complex Organic Interstellar Molecules
• Evaluated Kinetic Data for Combustion Modeling: Supplement II

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• Chemistry of TMC-1 with multiply deuterated species and spin chemistry of H 2 , H 2 + , H 3 + and their isotopologues