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Proceedings Paper

High dynamic range interferometric observations of exozodiacal discs: performance comparison between ground, space, and Antarctica
Author(s): Olivier Absil; Denis Defrère; Vincent Coudé du Foresto; Emmanuel Di Folco; Roland den Hartog; Jean-Charles Augereau
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Paper Abstract

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.

Paper Details

Date Published: 28 July 2008
PDF: 12 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70134Q (28 July 2008); doi: 10.1117/12.790298
Show Author Affiliations
Olivier Absil, LAOG, CNRS (France)
Univ. Joseph Fourier (France)
Denis Defrère, Institut d'Astrophysique et de Géophysique, Univ. de Liège (Belgium)
Vincent Coudé du Foresto, LESIA, CNRS (France)
Observatoire de Paris-Meudon (France)
Emmanuel Di Folco, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
Roland den Hartog, ESA/ESTEC (Netherlands)
Jean-Charles Augereau, LAOG, CNRS (France)
Univ. Joseph Fourier (France)

Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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