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Studying hot exozodiacal dust with near-infrared interferometry

hal.structure.identifierInstitut d'Astrophysique et de Géophysique [Liège]
dc.contributor.authorABSIL, Olivier
dc.contributor.authorDEFRÈRE, Denis
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorLE BOUQUIN, Jean-Baptiste
dc.contributor.authorMOLLIER, Benjamin
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorAUGEREAU, Jean-Charles
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
dc.contributor.authorCOUDÉ DU FORESTO, Vincent
hal.structure.identifierAMOR 2012
dc.contributor.authorDI FOLCO, E.
dc.contributor.authorERTEL, Steve
hal.structure.identifierCenter for High Angular Resolution Astronomy [CHARA]
dc.contributor.authorTEN BRUMMELAAR, Theo
dc.date.issued2012-07
dc.date.conference2012
dc.identifier.issn0277-786X
dc.description.abstractEnSince our first detection of a resolved near-infrared emission around the main sequence star Vega, which we identified as the signature of hot dust grains close to the sublimation limit, we have been systematically searching for similar signatures around a magnitude-limited sample of nearby main sequence stars with the FLUOR instrument at the CHARA array. About 40 targets with spectral types ranging from A to K have been observed within the last 6 years, leading to first statistical trends on the occurence of the bright exozodi phenomenon as a function of spectral type. Our target sample is balanced between stars known to harbour cold dust populations from space-based missions (e.g., Spitzer, Herschel) and stars without cold dust, so that the occurence of abundant hot dust can also be correlated with the presence of large reservoirs of cold planetesimals. In this paper, we present preliminary conclusions from the CHARA/FLUOR survey. We also discuss the first results obtained in 2011/2012 with the new PIONIER visiting instrument at the VLTI, which is now used to extend our survey sample to the Southern hemisphere and to fainter targets. A first measurement of the exozodi/star flux ratio as a function of wavelength within the H band is presented, thanks to the low spectral resolution capability of PIONIER. Finally, we also briefly discuss our plans for extending the survey to fainter targets in the Northern hemisphere with an upgraded version of the FLUOR beam combiner.
dc.language.isoen
dc.publisherSPIE, The International Society for Optical Engineering
dc.source.titleOptical and Infrared Interferometry III. Proceedings of the SPIE, Volume 8445, article id. 84450X, 10 pp. (2012)
dc.title.enStudying hot exozodiacal dust with near-infrared interferometry
dc.typeCommunication dans un congrès
dc.identifier.doi10.1117/12.926642
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
bordeaux.journalProceedings of SPIE, the International Society for Optical Engineering
bordeaux.page-
bordeaux.volume8445
bordeaux.conference.titleOptical and Infrared Interferometry III.
bordeaux.countryNL
bordeaux.title.proceedingOptical and Infrared Interferometry III. Proceedings of the SPIE, Volume 8445, article id. 84450X, 10 pp. (2012)
bordeaux.conference.cityamsterdam
bordeaux.peerReviewedoui
hal.identifierhal-00832281
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00832281v1
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