On the formation of glycolaldehyde in dense molecular cores

Woods, P M, Kelly, G, Viti, S, Slater, B, Brown, W A, Puletti, F, Burke, DJ and Raza, Z (2012) On the formation of glycolaldehyde in dense molecular cores. Astrophysical Journal, 750 (1). ISSN 0004-637X

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Glycolaldehyde is a simple monosaccharide sugar linked to prebiotic chemistry. Recently, it was detected in a molecular core in the star-forming region G31.41+0.31 at a reasonably high abundance. We investigate the formation of glycolaldehyde at 10 K to determine whether it can form efficiently under typical dense core conditions. Using an astrochemical model, we test five different reaction mechanisms that have been proposed in the astrophysical literature, finding that a gas-phase formation route is unlikely. Of the grain-surface formation routes, only two are efficient enough at very low temperatures to produce sufficient glycolaldehyde to match the observational estimates, with the mechanism culminating in CH3OH + HCO being favored. However, when we consider the feasibility of these mechanisms from a reaction chemistry perspective, the second grain-surface route looks more promising, H3CO + HCO.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry
Depositing User: Catrina Hey
Date Deposited: 21 May 2014 15:50
Last Modified: 24 Mar 2017 15:38
URI: http://srodev.sussex.ac.uk/id/eprint/48705

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