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Proceedings Paper

Post processing of differential images for direct extrasolar planet detection from the ground
Author(s): J.-F. Sauvage; L. Mugnier; T. Fusco; G. Rousset
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Paper Abstract

The direct imaging from the ground of extrasolar planets has become today a major astronomical and biological focus. This kind of imaging requires simultaneously the use of a dedicated high performance Adaptive Optics [AO] system and a differential imaging camera in order to cancel out the flux coming from the star. In addition, the use of sophisticated post-processing techniques is mandatory to achieve the ultimate detection performance required. In the framework of the SPHERE project, we present here the development of a new technique, based on Maximum A Posteriori [MAP] approach, able to estimate parameters of a faint companion in the vicinity of a bright star, using the multi-wavelength images, the AO closed-loop data as well as some knowledge on non-common path and differential aberrations. Simulation results show a 10-5 detectivity at 5σ for angular separation around 15λ/D with only two images.

Paper Details

Date Published: 28 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62722B (28 June 2006); doi: 10.1117/12.671470
Show Author Affiliations
J.-F. Sauvage, ONERA (France)
L. Mugnier, ONERA (France)
T. Fusco, ONERA (France)
G. Rousset, ONERA (France)
LESIA, Observatoire de Paris (France)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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