Awad, Z;
Coutens, A;
Viti, S;
Holdship, J;
(2021)
On the formation of deuterated methyl formate in hot corinos.
Monthly Notices of the Royal Astronomical Society
, 506
(1)
pp. 1019-1030.
10.1093/mnras/stab1759.
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Abstract
Methyl formate, HCOOCH3, and many of its isotopologues have been detected in astrophysical regions with considerable abundances. However, the recipe for the formation of this molecule and its isotopologues is not yet known. In this work, we attempt to investigate, theoretically, the successful recipe for the formation of interstellar HCOOCH3 and its deuterated isotopologues. We used the gas–grain chemical model, UCLCHEM, to examine the possible routes of formation of methyl formate on grain surfaces and in the gas-phase in low-mass star-forming regions. Our models show that radical–radical association on grains are necessary to explain the observed abundance of DCOOCH3 in the protostar IRAS 16293–2422. H-D substitution reactions on grains significantly enhance the abundances of HCOOCHD2, DCOOCHD2, and HCOOCD3. The observed abundance of HCOOCHD2 in IRAS 16293–2422 can only be reproduced if H-D substitution reactions are taken into account. However, HCOOCH2D remain underestimated in all of our models. The deuteration of methyl formate appears to be more complex than initially thought. Additional studies, both experimentally and theoretically, are needed for a better understanding of the interstellar formation of these species.
| Type: | Article |
|---|---|
| Title: | On the formation of deuterated methyl formate in hot corinos |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab1759 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stab1759 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | astrochemistry, stars: formation, stars: low-mass, ISM: abundances, ISM: molecules, COMPLEX ORGANIC-MOLECULES, STAR-FORMING REGIONS, LOW-MASS, SURFACE-REACTIONS, H2O-CO ICE, GAS, CHEMISTRY, PHASE, CORE, GLYCOLALDEHYDE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10136805 |
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