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HDO abundance in the envelope of the solar-type protostar IRAS16293-2422

hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorPARISE, B.
hal.structure.identifierCentre d'étude spatiale des rayonnements [CESR]
dc.contributor.authorCAUX, E.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
dc.contributor.authorCASTETS, Alain
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorCECCARELLI, C.
hal.structure.identifierCentro de Radioastronomia y Astrofisica [CRyA]
dc.contributor.authorLOINARD, L.
hal.structure.identifierSRON Netherlands Institute for Space Research [SRON]
dc.contributor.authorTIELENS, A. G. G. M.
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorBACMANN, A.
hal.structure.identifierCommissariat à l'énergie atomique et aux énergies alternatives [CEA]
dc.contributor.authorCAZAUX, S.
hal.structure.identifierLaboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides [CASSIOPEE]
dc.contributor.authorCOMITO, C.
dc.contributor.authorHELMICH, F.
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorKAHANE, C.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorSCHILKE, P.
hal.structure.identifierLeiden Observatory [Leiden]
dc.contributor.authorVAN DISHOECK, E.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
dc.contributor.authorWAKELAM, Valentine
dc.contributor.authorWALTERS, A.
dc.date.issued2005
dc.identifier.issn0004-6361
dc.description.abstractEnWe present IRAM 30m and JCMT observations of HDO lines towards the solar-type protostar IRAS 16293-2422. Five HDO transitions have been detected on-source, and two were unfruitfully searched for towards a bright spot of the outflow of IRAS 16293-2422. We interpret the data by means of the Ceccarelli, Hollenbach and Tielens (1996) model, and derive the HDO abundance in the warm inner and cold outer parts of the envelope. The emission is well explained by a jump model, with an inner abundance of 1e-7 and an outer abundance lower than 1e-9 (3 sigma). This result is in favor of HDO enhancement due to ice evaporation from the grains in theinner envelope. The deuteration ratio HDO/H2O is found to be f_in=3% and f_out < 0.2% (3 sigma) in the inner and outer envelope respectively and therefore, the fractionation also undergoes a jump in the inner part of the envelope. These results are consistent with the formation of water in the gas phase during the cold prestellar core phase and storage of the molecules on the grains, but do not explain why observations of H2O ices consistently derive a H2O ice abundance of several 1e-5 to 1e-4, some two orders of magnitude larger than the gas phase abundance of water in the hot core around IRAS 16293-2422.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enISM: molecules
dc.subject.enstars: formation
dc.subject.enstars: individual: IRAS 16293-2422
dc.title.enHDO abundance in the envelope of the solar-type protostar IRAS16293-2422
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361:20041899
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxivastro-ph/0410619
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.page547-554
bordeaux.volume431
bordeaux.peerReviewedoui
hal.identifierhal-00401894
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00401894v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&amp;rft.date=2005&amp;rft.volume=431&amp;rft.spage=547-554&amp;rft.epage=547-554&amp;rft.eissn=0004-6361&amp;rft.issn=0004-6361&amp;rft.au=PARISE,%20B.&amp;CAUX,%20E.&amp;CASTETS,%20Alain&amp;CECCARELLI,%20C.&amp;LOINARD,%20L.&amp;rft.genre=article


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