Is the Gas-phase OH+H2CO Reaction a Source of HCO in Interstellar Cold Dark Clouds? A Kinetic, Dynamic, and Modeling Study
- Ocana, A. J.
- Jimenez, E.
- Ballesteros, B.
- Canosa, André
- Antiñolo, M.
- Albaladejo, J.
- Agundez, M.
- Cernicharo, J.
- Zanchet, A.
- del Mazo, P.
- Roncero, O.
- Aguado, A.
DOIAbstract
International audienceChemical kinetics of neutral-neutral gas-phase reactions at ultralow temperatures is a fascinating research subject with important implications on the chemistry of complex organic molecules in the interstellar medium (T∼10-100K). Scarce kinetic information is currently available for this kind of reactions at T<200 K. In this work we use the CRESU (, which means Reaction Kinetics in a Uniform Supersonic Flow) technique to measure for the first time the rate coefficients () of the gas-phase OH+HCO reaction between 22 and 107 K. values greatly increase from 2.1×10 cm s at 107 K to 1.2×10 cm s at 22 K. This is also confirmed by quasi-classical trajectories (QCT) at collision energies down to 0.1 meV performed using a new ...
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