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hal.structure.identifierDpt. Astrofisica Molecular e Infrarroja
dc.contributor.authorTERCERO, Belen
dc.contributor.authorCUADRADO, Sara
dc.contributor.authorLÓPEZ, Alicia
hal.structure.identifierFORMATION STELLAIRE 2018
dc.contributor.authorBROUILLET, N.
hal.structure.identifierFORMATION STELLAIRE 2018
dc.contributor.authorDESPOIS, D.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorCERNICHARO, Jose
dc.date.issued2018
dc.identifier.issn0004-6361
dc.description.abstractEnWe investigate the chemical segregation of complex O-bearing species (including the largest and most complex ones detected to date in space) towards Orion KL, the closest high-mass star-forming region. The molecular line images obtained using the ALMA science verification data reveal a clear segregation of chemically related species depending on their different functional groups. We map the emission of 13CH3OH, HCOOCH3, CH3OCH3, CH2OCH2, CH3COOCH3, HCOOCH2CH3, CH3CH2OCH3, HCOOH, OHCH2CH2OH, CH3COOH, CH3CH2OH, CH3OCH2OH, OHCH2CHO, and CH3COCH3 with 1.5" angular resolution and provide molecular abundances of these species toward different gas components of this region. We disentangle the emission of these species in the different Orion components by carefully selecting lines free of blending and opacity effects. Possible effects in the molecular spatial distribution due to residual blendings and different excitation conditions are also addressed. We find that while species containing the C-O-C group, i.e. an ether group, exhibit their peak emission and higher abundance towards the compact ridge, the hot core south is the component where species containing a hydroxyl group (-OH) bound to a carbon atom (C-O-H) present their emission peak and higher abundance. This finding allows us to propose methoxy (CH3O-) and hydroxymethyl (-CH2OH) radicals as the major drivers of the chemistry in the compact ridge and the hot core south, respectively, as well as different evolutionary stages and prevailing physical processes in the different Orion components.
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enChemical segregation of complex organic O-bearing species in Orion KL
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201834417
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageL6
bordeaux.volume620
bordeaux.peerReviewedoui
hal.identifierhal-01934754
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01934754v1
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