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Poster (Scientific congresses and symposiums)
Infrared interferometric observations of nearby exozodiacal disks: current status and perspectives
Defrere, Denis; Absil, Olivier; di Folco, E. et al.
2010In the spirit of Lyot 2010: Direct Detection of Exoplanets and Circumstellar Disks
 

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Keywords :
Exoplanet; Exozodiacal disk; Coronagraphy; Interferometry
Abstract :
[en] Directly detecting exozodiacal dust in the inner part of extrasolar planetary systems is nowadays feasible thanks to the advance of high-precision near-infrared interferometry. Investigating this region around nearby stars provides unique information to understand the global architecture of planetary systems and to define the population of stars suitable for future exo-Earth characterization missions. Over the last few years, a survey of nearby main-sequence stars has been ongoing at the CHARA array using the FLUOR beam combiner. The goal of this survey is to directly probe the inner part of circumstellar disks in order to detect the signature of hot dust accounting for about 1% of the near-infrared stellar flux. In this paper, we present the status of this survey and provide the first statistical results about the occurrence of bright exozodiacal disks around nearby main-sequence stars. We also report on the first H-band interferometric observations of the exozodiacal disk around Vega which have been obtained with IOTA/IONIC, and discuss the implications on the disk properties.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Defrere, Denis ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Absil, Olivier  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
di Folco, E.;  CEA
Coudé du Foresto, V.;  LESIA
Mérand, A.;  ESO
Augereau, J.-C.;  LAOG)
Language :
English
Title :
Infrared interferometric observations of nearby exozodiacal disks: current status and perspectives
Publication date :
01 October 2010
Event name :
In the spirit of Lyot 2010: Direct Detection of Exoplanets and Circumstellar Disks
Event organizer :
Université Paris Diderot
Event place :
Paris, France
Event date :
from 25-10-2010 to 29-10-2010
Audience :
International
Available on ORBi :
since 07 August 2017

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