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dc.contributor.authorDE BECK, Elvire
dc.contributor.authorVLEMMINGS, Wouter
hal.structure.identifierObjets communicants pour l'Internet du futur [OCIF]
hal.structure.identifierDépartement Réseaux, Sécurité et Multimédia [RSM]
hal.structure.identifierSecurity, Reliability and Trust Interdisciplibary Research Centre [S'nT]
dc.contributor.authorMULLER, Sébastien
hal.structure.identifierHumboldt State University [HSU]
dc.contributor.authorBLACK, John H.
hal.structure.identifierDepartment of Biology
dc.contributor.authorO'GORMAN, Eamon
hal.structure.identifierCardiff University
dc.contributor.authorRICHARDS, Anita M. S.
hal.structure.identifierFORMATION STELLAIRE 2016
dc.contributor.authorBAUDRY, Alain
dc.contributor.authorMAERCKER, Matthias
dc.contributor.authorDECIN, Leen
dc.contributor.authorHUMPHREYS, Elizabeth M.
dc.date.issued2016-07-01
dc.identifier.issn1742-6596
dc.description.abstractEnTitanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-condensation sequence around oxygen-rich evolved stars. We present and discuss the detections of 15 emission lines of TiO2 with ALMA in the complex environment of the red supergiant VY CMa. The observations reveal a highly clumpy, anisotropic outflow in which the TiO2 emission likely traces gas exposed to the stellar radiation field. We find evidence for a roughly east-west oriented, accelerating bipolar-like structure, of which the blue component runs into and breaks up around a solid continuum component. We see a distinct tail to the south-west for some transitions, consistent with features seen in the optical and near-infrared. We find that a significant fraction of TiO2 remains in the gas phase outside the dust-formation zone and suggest that this species might play only a minor role in the dust-condensation process around extreme oxygen-rich evolved stars like VY CMa.
dc.language.isoen
dc.publisherIOP Science
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enALMA observations of TiO 2 around VY CMa
dc.typeArticle de revue
dc.identifier.doi10.1088/1742-6596/728/2/022009
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
bordeaux.journalJournal of Physics: Conference Series
bordeaux.pageid. 022009
bordeaux.volume728
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01435295
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01435295v1
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