Show simple item record

hal.structure.identifierAMOR 2018
dc.contributor.authorCOUTENS, Audrey
hal.structure.identifierAtmospheric Physics Laboratory [UCL London]
dc.contributor.authorVITI, S.
dc.contributor.authorRAWLINGS, J. M. C.
dc.contributor.authorBELTRÁN, M. T.
dc.contributor.authorHOLDSHIP, J.
dc.contributor.authorJIMÉNEZ-SERRA, I.
dc.contributor.authorQUENARD, D.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorRIVILLA, V. M.
dc.date.issued2018-01-05
dc.identifier.issn0035-8711
dc.description.abstractEnGlycolaldehyde (HOCH$_2$CHO) and ethylene glycol ((CH$_2$OH)$_2$) are two complex organic molecules detected in the hot cores and hot corinos of several star-forming regions. The ethylene glycol/glycolaldehyde abundance ratio seems to show an increase with the source luminosity. In the literature, several surface-chemistry formation mechanisms have been proposed for these two species. With the UCLCHEM chemical code, we explored the different scenarios and compared the predictions for a range of sources of different luminosities with the observations. None of the scenarios reproduce perfectly the trend. A better agreement is, however, found for a formation through recombination of two HCO radicals followed by successive hydrogenations. The reaction between HCO and CH$_2$OH could also contribute to the formation of glycolaldehyde in addition to the hydrogenation pathway. The predictions are improved when a trend of decreasing H$_2$ density within the core region with T $\geq$ 100 K as a function of luminosity, is included in the model. Destruction reactions of complex organic molecules in the gas phase would also need to be investigated, since they can affect the abundance ratios once the species have desorbed in the warm inner regions of the star-forming regions.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enAstrophysics - Solar and Stellar Astrophysics
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enChemical modelling of glycolaldehyde and ethylene glycol in star-forming regions
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stx3335
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page2016-2026
bordeaux.volume475
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01685039
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01685039v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly%20Notices%20of%20the%20Royal%20Astronomical%20Society&rft.date=2018-01-05&rft.volume=475&rft.issue=2&rft.spage=2016-2026&rft.epage=2016-2026&rft.eissn=0035-8711&rft.issn=0035-8711&rft.au=COUTENS,%20Audrey&VITI,%20S.&RAWLINGS,%20J.%20M.%20C.&BELTR%C3%81N,%20M.%20T.&HOLDSHIP,%20J.&rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record