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Redundant versus non-redundant apertures for exoplanet detection

Published online by Cambridge University Press:  28 May 2003

Claude Aime ,
Rémi Soummer ,
C. Aime  and
R. Soummer
C. Aime
Affiliation:
UMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
R. Soummer
Affiliation:
UMR 6525 Astrophysique, University of Nice Sophia-Antipolis, 06108 Nice Cedex 2, France
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Abstract

Using simplificative assumptions, we show that a redundant configuration of diluted apertures should permitan easier exoplanet detection than a non-redundant one. This result assumes that after coronagraphy theplanet appears over an uniform background whose statistical fluctuation is the unique source of noise. Thedetection is made using a matched filter, cross-correlating the observed image with the telescope array PSF.In that case, the relevant parameter appears to be the integral of the modulus squared of the aperture MTF.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 8: Astronomy with High Contrast Imaging , 2003 , pp. 353 - 359
Copyright
© EAS, EDP Sciences, 2003

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