| Issue |
A&A
Volume 370, Number 2, May I 2001
|
|
|---|---|---|
| Page(s) | 680 - 688 | |
| Section | Numerical methods and codes | |
| DOI | https://doi.org/10.1051/0004-6361:20010263 | |
| Published online | 15 May 2001 | |
Stellar coronagraphy with a redundant array of telescopes in space:
The multiple mask coronagraph
1
UMR 6525 Astrophysique, Faculté des sciences, Université de Nice Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 2, France e-mail: Remi.Soummer@unice.fr
2
Observatoire de la Côte d'Azur, Département Fresnel, UMR 6528, 06304 Nice Cedex 4, France e-mail: lopez@obs-nice.fr
Corresponding author: C. Aime, Claude.Aime@unice.fr
Received:
25
October
2000
Accepted:
7
February
2001
We describe a coronagraphic technique that can be used with an array of telescopes in space. It generalizes the use of Lyot's Masks and Roddier & Roddier's Phase Masks [CITE] to an array of telescopes without the densification of the pupil recently proposed by [CITE] and [CITE]. The proposed method consists of using an ensemble of masks set on the principal diffraction peaks of the point spread function. The best efficiency is obtained for a redundant configuration of the apertures. A linear array configuration is proposed for solving the problems of chromatism associated with phase mask coronagraphy and permits image reconstruction via tomographic techniques. A numerical simulation is made for a one-dimensional array of telescopes.
Key words: instrumentation: interferometers / methods: observational / techniques: image processing / stars: planetary systems
© ESO, 2001
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