Extreme coronagraphy with an adaptive hologramSimulations of exo-planet imaging

D. Ricci; H. Le Coroller; A. Labeyrie

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Extreme coronagraphy with an adaptive hologramSimulations of exo-planet imaging

机译：Extreme coronagraphy with an adaptive hologramSimulations of exo-planet imaging

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Aims. We present a solution to improve the performance of coronagraphs for the detection of exo-planets.Methods. We simulate numerically several kinds of coronagraphic systems, with the aim of evaluating the gain obtained with anadaptive hologram.Results. The detection limit in flux ratio between a star and a planet (F_s/F_p)observed with an apodized Lyot coronagraph charac-terized by wavefront bumpiness imperfections of λ/20 (resp. λ/100) turns out to be increased by a factor of 10~(3.4)(resp. 10~(5.1)) whenequipped with a hologram.Conclusions. This technique could provide direct imaging of an exo-Earth at a distance of 11 parsec with a 6.5 m space telescopesuch as the JWST with the optical quality of the HST.

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《Astronomy and astrophysics》 |2009年第1期|301-308|共8页
作者
D. Ricci; H. Le Coroller; A. Labeyrie;
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作者单位

Departement d' Astrophysique, Geophysique et Oceanographie, Bat.BSC,Sart Tilman, Universite de Liege, 4000 Liege 1, Belgium;

Observatoire de Haute Provence, 04870 Saint Michel l'Observatoire, France;

College de France, 11, place Marcelin Berthelot, 75231 Paris Cedex 05, France;

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正文语种英语
中图分类天文学;
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instrumentation; detectors – instrumentation; miscellaneous – stars; planetary systems – instrumentation; interferometers;

Extreme coronagraphy with an adaptive hologramSimulations of exo-planet imaging

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