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hal.structure.identifierAMOR 2020
dc.contributor.authorWAKELAM, V.
hal.structure.identifierAMOR 2020
dc.contributor.authorIQBAL, W.
hal.structure.identifierAMOR 2020
dc.contributor.authorMELISSE, J.-P.
hal.structure.identifierAMOR 2020
dc.contributor.authorGRATIER, P.
hal.structure.identifierAMOR 2020
dc.contributor.authorRUAUD, M.
dc.contributor.authorBONNELL, I.
dc.date.issued2020-09-11
dc.identifier.issn0035-8711
dc.description.abstractEnWe present a study of the elemental depletion in the interstellar medium. We combined the results of a Galactic model describing the gas physical conditions during the formation of dense cores with a full-gas-grain chemical model. During the transition between diffuse and dense medium, the reservoirs of elements, initially atomic in the gas, are gradually depleted on dust grains (with a phase of neutralization for those which are ions). This process becomes efficient when the density is larger than 100 cm-3. If the dense material goes back into diffuse conditions, these elements are brought back in the gas phase because of photo-dissociations of the molecules on the ices, followed by thermal desorption from the grains. Nothing remains on the grains for densities below 10 cm-3 or in the gas phase in a molecular form. One exception is chlorine, which is efficiently converted at low density. Our current gas-grain chemical model is not able to reproduce the depletion of atoms observed in the diffuse medium except for Cl, which gas abundance follows the observed one in medium with densities smaller than 10 cm-3. This is an indication that crucial processes (involving maybe chemisorption and/or ice irradiation profoundly modifying the nature of the ices) are missing.
dc.language.isoen
dc.publisherOxford University Press (OUP): Policy P - Oxford Open Option A
dc.subject.enastrochemistry
dc.subject.enISM: abundances
dc.subject.enISM: atoms
dc.subject.enISM: evolution
dc.title.enInfluence of galactic arm scale dynamics on the molecular composition of the cold and dense ISM III. Elemental depletion and shortcomings of the current physico-chemical models
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/staa2016
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv2007.11788
bordeaux.journalMonthly Notices of the Royal Astronomical Society
bordeaux.page2309-2319
bordeaux.volume497
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-02973012
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02973012v1
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