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Title: GLYCOLALDEHYDE FORMATION VIA THE DIMERIZATION OF THE FORMYL RADICAL

Abstract

Glycolaldehyde, the simplest monosaccharide sugar, has recently been detected in low- and high-mass star-forming cores. Following our previous investigation into glycolaldehyde formation, we now consider a further mechanism for the formation of glycolaldehyde that involves the dimerization of the formyl radical, HCO. Quantum mechanical investigation of the HCO dimerization process upon an ice surface is predicted to be barrierless and therefore fast. In an astrophysical context, we show that this mechanism can be very efficient in star-forming cores. It is limited by the availability of the formyl radical, but models suggest that only very small amounts of CO are required to be converted to HCO to meet the observational constraints.

Authors:
;  [1]; ; ;
  1. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom)
Publication Date:
OSTI Identifier:
22270657
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 777; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; CARBON MONOXIDE; COSMOCHEMISTRY; DIMERIZATION; FORMYL RADICALS; LIMITING VALUES; MOLECULES; MONOSACCHARIDES; QUANTUM MECHANICS; SACCHAROSE; STARS

Citation Formats

Woods, Paul M., Viti, Serena, Slater, Ben, Raza, Zamaan, Brown, Wendy A., and Burke, Daren J., E-mail: p.woods@qub.ac.uk. GLYCOLALDEHYDE FORMATION VIA THE DIMERIZATION OF THE FORMYL RADICAL. United States: N. p., 2013. Web. doi:10.1088/0004-637X/777/2/90.
Woods, Paul M., Viti, Serena, Slater, Ben, Raza, Zamaan, Brown, Wendy A., & Burke, Daren J., E-mail: p.woods@qub.ac.uk. GLYCOLALDEHYDE FORMATION VIA THE DIMERIZATION OF THE FORMYL RADICAL. United States. https://doi.org/10.1088/0004-637X/777/2/90
Woods, Paul M., Viti, Serena, Slater, Ben, Raza, Zamaan, Brown, Wendy A., and Burke, Daren J., E-mail: p.woods@qub.ac.uk. 2013. "GLYCOLALDEHYDE FORMATION VIA THE DIMERIZATION OF THE FORMYL RADICAL". United States. https://doi.org/10.1088/0004-637X/777/2/90.
@article{osti_22270657,
title = {GLYCOLALDEHYDE FORMATION VIA THE DIMERIZATION OF THE FORMYL RADICAL},
author = {Woods, Paul M. and Viti, Serena and Slater, Ben and Raza, Zamaan and Brown, Wendy A. and Burke, Daren J., E-mail: p.woods@qub.ac.uk},
abstractNote = {Glycolaldehyde, the simplest monosaccharide sugar, has recently been detected in low- and high-mass star-forming cores. Following our previous investigation into glycolaldehyde formation, we now consider a further mechanism for the formation of glycolaldehyde that involves the dimerization of the formyl radical, HCO. Quantum mechanical investigation of the HCO dimerization process upon an ice surface is predicted to be barrierless and therefore fast. In an astrophysical context, we show that this mechanism can be very efficient in star-forming cores. It is limited by the availability of the formyl radical, but models suggest that only very small amounts of CO are required to be converted to HCO to meet the observational constraints.},
doi = {10.1088/0004-637X/777/2/90},
url = {https://www.osti.gov/biblio/22270657}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 777,
place = {United States},
year = {Sun Nov 10 00:00:00 EST 2013},
month = {Sun Nov 10 00:00:00 EST 2013}
}