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hal.structure.identifierNetherlands Institute for Radio Astronomy [ASTRON]
dc.contributor.authorBAAN, W. A.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorHENKEL, Carsten
hal.structure.identifierNetherlands Institute for Radio Astronomy [ASTRON]
dc.contributor.authorLOENEN, A. F.
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]
dc.contributor.authorBAUDRY, Alain
hal.structure.identifierOnsala Space Observatory
dc.contributor.authorWIKLIND, T.
dc.date.issued2008
dc.identifier.issn0004-6361
dc.description.abstractEnMolecules that trace the high-density regions of the interstellar medium have been observed in (Ultra-)Luminous Infrared Galaxies, in order to initiate multiple-molecule multiple-transition studies to evaluate the physical and chemical environment of the nuclear medium and its response to the ongoing nuclear activity. The HCN(1-0), HNC(1-0), HCO+(1-0), CN(1-0) and CN(2-1), CO(2-1), and CS(3-2) transitions were observed in sources covering three decades of infrared luminosity including sources with known OH megamaser activity. The data for the molecules that trace the high-density regions have been augmented with data available in the literature. The integrated emissions of high-density tracer molecules show a strong relation to the infrared luminosity. Ratios of integrated line luminosities have been used for a first order diagnosis of the integrated molecular environment of the evolving nuclear starbursts. Diagnostic diagrams display significant differentiation among the sources that relate to initial conditions and the radiative excitation environment. Initial differentiation has been introduced between the FUV radiation field in photon-dominated-regions and the X-ray field in X-ray-dominated-regions. The galaxies displaying OH megamaser activity have line ratios typical of PDRs.
dc.language.isoen
dc.publisherEDP Sciences
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361:20077203
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxiv0710.0141
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.page747-762
bordeaux.volume477
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-00177539
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00177539v1
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