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ATOMIUM: halide molecules around the S-type AGB star W Aquilae

hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorDANILOVICH, T.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorVAN DE SANDE, M.
hal.structure.identifierSchool of Chemistry [Leeds]
dc.contributor.authorPLANE, J.
hal.structure.identifierAstrophysics Research Centre [Belfast] [ARC]
dc.contributor.authorMILLAR, T. J.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorROYER, P.
hal.structure.identifierLaboratoire de Spectroscopie Atomique, Moléculaire et Applications [LSAMA]
dc.contributor.authorAMOR, M. A.
hal.structure.identifierLaboratoire de Spectroscopie Atomique, Moléculaire et Applications [LSAMA]
dc.contributor.authorHAMMAMI, K.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorDECOCK, L.
hal.structure.identifierHarvard-Smithsonian Center for Astrophysics [CfA]
dc.contributor.authorGOTTLIEB, C. A.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierSchool of Chemistry [Leeds]
dc.contributor.authorDECIN, L.
hal.structure.identifierJodrell Bank Centre for Astrophysics [JBCA]
dc.contributor.authorRICHARDS, A. M. S.
hal.structure.identifierOnsala Space Observatory [OSO]
dc.contributor.authorDE BECK, E.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBAUDRY, A.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorBOLTE, J.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorCANNON, E.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
dc.contributor.authorDE CEUSTER, F.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierAstronomical Institute Anton Pannekoek [AI PANNEKOEK]
dc.contributor.authorDE KOTER, A.
hal.structure.identifierJodrell Bank Centre for Astrophysics [JBCA]
dc.contributor.authorETOKA, S.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorGOBRECHT, D.
hal.structure.identifierJodrell Bank Centre for Astrophysics [JBCA]
hal.structure.identifierNational Astronomical Research Institute of Thailand, Thailand, puji.irawati@gmail.com
dc.contributor.authorGRAY, M.
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorHERPIN, F.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierInstitut d'Astronomie et d'Astrophysique [Bruxelles] [IAA]
dc.contributor.authorHOMAN, W.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorJESTE, M.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorKERVELLA, P.
hal.structure.identifierOnsala Space Observatory [OSO]
dc.contributor.authorKHOURI, T.
hal.structure.identifierObservatoire de la Côte d'Azur
dc.contributor.authorLAGADEC, E.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorMAES, S.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorMALFAIT, J.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierThe Open University [Milton Keynes] [OU]
dc.contributor.authorMCDONALD, I.
hal.structure.identifierMax-Planck-Institut für Radioastronomie [MPIFR]
dc.contributor.authorMENTEN, K. M.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorMONTARGÈS, M.
hal.structure.identifierUniversität zu Köln = University of Cologne
dc.contributor.authorMÜLLER, H. S. P.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierNational Astronomical Research Institute of Thailand, Thailand, puji.irawati@gmail.com
dc.contributor.authorPIMPANUWAT, B.
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorSAHAI, R.
hal.structure.identifierInstitute of Astronomy [Leuven]
dc.contributor.authorWALLSTRÖM, S.
hal.structure.identifierSRON Netherlands Institute for Space Research [SRON]
hal.structure.identifierInstitute for Mathematics, Astrophysics and Particle Physics [IMAPP]
dc.contributor.authorWATERS, L. B. F. M.
hal.structure.identifierInstitut de RadioAstronomie Millimétrique [IRAM]
dc.contributor.authorWONG, K. T.
hal.structure.identifierDepartment of Physics and Astronomy [UCL London]
dc.contributor.authorYATES, J.
hal.structure.identifierInstitute of Astronomy [Leuven]
hal.structure.identifierLaboratory for Space Research [Hong Kong] [LSR]
dc.contributor.authorZIJLSTRA, A.
dc.date.issued2021-11-24
dc.identifier.issn0004-6361
dc.description.abstractEnContext. S-type asymptotic giant branch (AGB) stars are thought to be intermediates in the evolution of oxygen- to carbon-rich AGB stars. The chemical compositions of their circumstellar envelopes are also intermediate but have not been studied in as much detail as their carbon- and oxygen-rich counterparts. W Aql is a nearby S-type star, with well-known circumstellar parameters, making it an ideal object for in-depth study of less common molecules.Aims. We aim to determine the abundances of AlCl and AlF from rotational lines, which have been observed for the first time towards an S-type AGB star. In combination with models based on PACS observations, we aim to update our chemical kinetics network based on these results.Methods. We analyse ALMA observations towards W Aql of AlCl in the ground and first two vibrationally excited states and AlF in the ground vibrational state. Using radiative transfer models, we determine the abundances and spatial abundance distributions of Al35Cl, Al37Cl, and AlF. We also model HCl and HF emission and compare these models to PACS spectra to constrain the abundances of these species.Results. AlCl is found in clumps very close to the star, with emission confined within 0′′.1 of the star. AlF emission is more extended, with faint emission extending 0′′.2 to 0′′.6 from the continuum peak. We find peak abundances, relative to H2, of 1.7 × 10−7 for Al35Cl, 7 × 10−8 for Al37Cl, and 1 × 10−7 for AlF. From the PACS spectra, we find abundances of 9.7 × 10−8 and ≤10−8, relative to H2, for HCl and HF, respectively.Conclusions. The AlF abundance exceeds the solar F abundance, indicating that fluorine synthesised in the AGB star has already been dredged up to the surface of the star and ejected into the circumstellar envelope. From our analysis of chemical reactions in the wind, we conclude that AlF may participate in the dust formation process, but we cannot fully explain the rapid depletion of AlCl seen inthe wind.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enstars: AGB and post-AGB
dc.subject.encircumstellar matter
dc.subject.ensubmillimeter: stars
dc.subject.enstars: individual: W Aql
dc.subject.enstars: individual: χ Cyg
dc.title.enATOMIUM: halide molecules around the S-type AGB star W Aquilae
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202141757
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv2109.04747
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA80
bordeaux.volume655
bordeaux.peerReviewedoui
hal.identifierhal-03462956
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03462956v1
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