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High dynamic range interferometric observations of exozodiacal discs: performance comparison between ground, space, and Antarctica
Absil, Olivier; Defrere, Denis; Coudé du Foresto, Vincent et al.
2008In Schöller, Markus; Danchi, William; Delplancke, Françoise (Eds.) Optical and Infrared Interferometry
 

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Keywords :
Exozodiacal dust; Infrared interferometry; Nulling interferometry; High-dynamic range observations
Abstract :
[en] The possible presence of large amounts of exozodiacal dust around nearby main sequence stars represents a threat to the detection and characterisation of Earth-like extrasolar planets with future infrared space interferometers such as DARWIN or TPF. In this paper, we first review the current detection capabilities of ground-based infrared interferometers such as CHARA/FLUOR and the detections of hot dust that have been obtained so far around a few main sequence stars. With the help of realistic instrumental simulations, we then discuss the relative merits of various ground-based sites (temperate and Antarctic) versus space-based observatories for the detection of exozodiacal discs down to a few zodi by interferometric nulling as a preparation to future life-finding missions. In particular, we discuss the performance of four proposed nulling interferometers: GENIE, ALADDIN, PEGASE and FKSI. An optimised strategy for the characterisation of candidate DARWIN/TPF targets is finally proposed.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Absil, Olivier  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Defrere, Denis ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Coudé du Foresto, Vincent;  LESIA, CNRS (France) and Observatoire de Paris-Meudon (France)
Di Folco, Emmanuel;  Observatoire Astronomique de l'Univ. de Genève (Switzerland)
den Hartog, Roland;  ESA/ESTEC (Netherlands)
Augereau, Jean-Charles;  LAOG, CNRS (France) and Univ. Joseph Fourier (France)
Language :
English
Title :
High dynamic range interferometric observations of exozodiacal discs: performance comparison between ground, space, and Antarctica
Publication date :
01 July 2008
Event name :
Space Telescopes and Instrumentation 2008: Optical and Infrared Interferometry
Event organizer :
SPIE
Event place :
Marseille, France
Event date :
23/06/2008 - 28/06/2008
Audience :
International
Main work title :
Optical and Infrared Interferometry
Editor :
Schöller, Markus
Danchi, William
Delplancke, Françoise
Publisher :
SPIE, Bellingham, United States - Washington
Collection name :
Proceedings of the SPIE, volume 7013
Pages :
4Q.1-4Q.12
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