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Sulphur chemistry and molecular shocks: the case of NGC1333-IRAS2

hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorWAKELAM, Valentine
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorCECCARELLI, C.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorCASTETS, Alain
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorLEFLOCH, Bertrand
hal.structure.identifierCentro de Radioastronomia y Astrofisica [CRyA]
dc.contributor.authorLOINARD, Laurent
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorFAURE, Alexandre
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorSCHNEIDER, N.
hal.structure.identifierLaboratoire d'Astrophysique de Grenoble [LAOG]
dc.contributor.authorBENAYOUN, Jean-Jacques
dc.date.issued2005
dc.identifier.issn0004-6361
dc.description.abstractEnWe present SO and SO2 observations in the region of the low mass protostar IRAS2/NGC1333. The East-West outflow originating from this source has been mapped in four transitions of both SO and SO2. In addition, CS observations published in the literature have been used. We compute the SO, SO2 and CS column densities and the physical conditions at several positions of the outflow using LTE and a non-LTE LVG approximations. The SO2/SO and CS/SO abundance ratios are compared with the theoretical predictions of a chemical model adapted to the physical conditions in the IRAS2 outflow. The SO2/SO abundance ratios are constant in the two lobes of the outflow whereas CS/SO is up to 6 times lower in the shocked gas of the East lobe than in the West one. The comparison with the chemical model allows us to constrain the age of the outflow produced by IRAS2 to >5e3yr. We find low densities and temperatures for the outflow of IRAS2 (< 1e6 cm-3 and >70 K) from SO and SO2 emission probably because the two molecules trace the cooled entrained material. The East lobe of the outflow shows denser gas compared to the West lobe. We also discuss some constraints on the depleted form of sulphur.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enabundances
dc.subject.enmolecules
dc.subject.enStar formation
dc.subject.enjets and outflows
dc.subject.enNGC1333-IRAS2
dc.title.enSulphur chemistry and molecular shocks: the case of NGC1333-IRAS2
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361:20042566
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxivastro-ph/0503462
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.page149-158
bordeaux.volume437
bordeaux.peerReviewedoui
hal.identifierhal-00004549
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00004549v1
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=437&amp;rft.spage=149-158&amp;rft.epage=149-158&amp;rft.eissn=0004-6361&amp;rft.issn=0004-6361&amp;rft.au=WAKELAM,%20Valentine&amp;CECCARELLI,%20C.&amp;CASTETS,%20Alain&amp;LEFLOCH,%20Bertrand&amp;LOINARD,%20Laurent&amp;rft.genre=article


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