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Proceedings Paper

Infra arcsec, infra mJy astronomy: exoplanetary scene models for exo-Earth detection through IR interferometric nulling
Author(s): Adrian Belu; Marc Ollivier; Guilaine Lagache; Olivier Germain; Stephen Dunne; Stephane Bonnot; Didier Miras; Rodolphe Krawczyk; Roland den Hartog; Malcolm Fridlund; Christian Erd; Farrokh Vakili
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Paper Abstract

We have conducted an exhaustive inventory of potential astrophysical "noise sources" with respect to the detection and characterisation of Earth-like planets, focusing on the specifics of the nulling interferometry technique. We have extrapolated their characterisation at these yet-to-be-attained resolution and sensitivity, from existing data and models. They range from stellar features and significant orbital motion of pegasides during exposure, to exozodiacal cloud structures, background galaxies and galactic cirrus emission. This enabled us to evaluate the offset between the various features a typical interferometric nulling field-of-view (FOV) is likely to exhibit in reality, and the simplified, planet-only, detection FOV model generally used. This work is complementary to precise nulling data model formalization and detection algorithms development (Thiebaut et al., this conference), together conducted in the frame of an ESA contract by an Alcatel Alenia Space-led consortium. As such, part of this work is under embedment into a Java open-source simulator (ORIGIN). This approach can be useful for less signal-entangling, direct imaging techniques.

Paper Details

Date Published: 27 June 2006
PDF: 10 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62680C (27 June 2006); doi: 10.1117/12.671674
Show Author Affiliations
Adrian Belu, Lab. Univ. d'Astrophysique de Nice, Univ. de Nice Sophia-Antipolis/CNRS (France)
Marc Ollivier, Institut d'Astrophysique Spatiale, Univ. Paris-Sud/CNRS-INSU (France)
Guilaine Lagache, Institut d'Astrophysique Spatiale, Univ. Paris-Sud/CNRS-INSU (France)
Olivier Germain, Starlab Barcelona S.L. (Spain)
Stephen Dunne, Starlab Barcelona S.L. (Spain)
Stephane Bonnot, Alcatel Alenia Space (France)
Didier Miras, Alcatel Alenia Space (France)
Rodolphe Krawczyk, Alcatel Alenia Space (France)
Roland den Hartog, European Space Agency, ESTEC (Netherlands)
Malcolm Fridlund, European Space Agency, ESTEC (Netherlands)
Christian Erd, European Space Agency, ESTEC (Netherlands)
Farrokh Vakili, Lab. Univ. d'Astrophysique de Nice, Univ. de Nice Sophia-Antipolis/CNRS (France)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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