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Communication Dans Un Congrès Année : 2008

Prototyping coronagraphs for exoplanet characterization with SPHERE

Résumé

The detection and characterization of extrasolar planets with SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) is challenging and in particular relies on the ability of a coronagraph to attenuate the diffracted starlight. SPHERE includes 3 instruments, 2 of which can be operated simultaneously in the near IR from 0.95 to 1.8 microns. This requirements is extremely critical for coronagraphy. This paper briefly introduces the concepts of 2 coronagraphs, the Half-Wave Plate Four Quadrant Phase Masks and the Apodized Pupil Lyot Coronagraph, prototyped within the SPHERE consortium by LESIA (Observatory of Paris) and FIZEAU (University of Nice) respectively. Then, we present the measurements of contrast and sensitivity analysis. The comparison with technical specifications allows to validate the technology for manufacturing these coronagraphs.

Dates et versions

hal-03729854 , version 1 (20-07-2022)

Identifiants

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Anthony Boccaletti, Lyu Abe, Jacques Baudrand, Jean-Baptiste Daban, Richard Douet, et al.. Prototyping coronagraphs for exoplanet characterization with SPHERE. Adaptive Optics Systems, Jun 2008, Marseille, France. pp.34, ⟨10.1117/12.789341⟩. ⟨hal-03729854⟩
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