ALMA observations of TiO 2 around VY CMa
| dc.contributor.author | DE BECK, Elvire | |
| dc.contributor.author | VLEMMINGS, Wouter | |
| hal.structure.identifier | Objets communicants pour l'Internet du futur [OCIF] | |
| hal.structure.identifier | Département Réseaux, Sécurité et Multimédia [RSM] | |
| hal.structure.identifier | Security, Reliability and Trust Interdisciplibary Research Centre [S'nT] | |
| dc.contributor.author | MULLER, Sébastien | |
| hal.structure.identifier | Humboldt State University [HSU] | |
| dc.contributor.author | BLACK, John H. | |
| hal.structure.identifier | Department of Biology | |
| dc.contributor.author | O'GORMAN, Eamon | |
| hal.structure.identifier | Cardiff University | |
| dc.contributor.author | RICHARDS, Anita M. S. | |
| hal.structure.identifier | FORMATION STELLAIRE 2016 | |
| dc.contributor.author | BAUDRY, Alain | |
| dc.contributor.author | MAERCKER, Matthias | |
| dc.contributor.author | DECIN, Leen | |
| dc.contributor.author | HUMPHREYS, Elizabeth M. | |
| dc.date.issued | 2016-07-01 | |
| dc.identifier.issn | 1742-6596 | |
| dc.description.abstractEn | Titanium 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.iso | en | |
| dc.publisher | IOP Science | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.title.en | ALMA observations of TiO 2 around VY CMa | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/1742-6596/728/2/022009 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA] | |
| bordeaux.journal | Journal of Physics: Conference Series | |
| bordeaux.page | id. 022009 | |
| bordeaux.volume | 728 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01435295 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01435295v1 | |
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