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Proceedings Paper

Direct exoplanet imaging possibilities of the nulling stellar coronagraph
Author(s): Olivier Guyon; Francois J. Roddier
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Paper Abstract

The nulling stellar coronagraph, first proposed by Roddier and Roddier and later demonstrated in a laboratory experiment is a technique to produce wide-field coronagraphic images. It uses a small phase-shifting mask in the focal plane to remove the central star by destructive interference. When applied to a space-based interferometric array of telescopes, it can be a powerful tool to search for faint companions around nearby stars or image circumstellar disks. A program was written to simulate the performance of a nulling stellar coronagraph for single or multi aperture telescopes in space or on the ground. In this study, we explore some aspects of the use of such a technique. By running our simulation program on various sources, we find that a nulling stellar coronagraph applied on a space interferometer like Darwin or TPF can image Earth-type planets in less than an hour of exposure time.

Paper Details

Date Published: 5 July 2000
PDF: 11 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390230
Show Author Affiliations
Olivier Guyon, Univ. of Hawaii and Ecole Normale Superieure (United States)
Francois J. Roddier, Univ. of Hawaii (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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