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arXiv 0907.0326astro-ph.IM
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用自适应全息照相术进行极端日冕照相

Extreme coronagraphy with an adaptive hologram Simulations of exo-planet imaging

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

摘要:

目标。我们提出了一种解决方案,以提高性能的日冕仪的检测系外行星。方法.我们数值模拟了几种日冕系统,目的是评估与自适应全息图获得的增益。结果本文介绍了用波前起伏为λ/20的变迹Lyot日冕仪观测到的恒星和行星之间的流量比(Fs/Fp)的探测极限。λ/100)的系数增加了10^3.4(分别为10^5.1)时配备全息图。结论.这项技术可以提供直接成像的exo-Earth在11秒差距的距离与6.5米的空间望远镜,如JWST的光学质量的HST。

英文摘要:

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 an adaptive hologram. Results. The detection limit in flux ratio between a star and a planet (Fs/Fp) observed with an apodized Lyot coronagraph characterized by wavefront bumpiness imperfections of lambda/20 (resp. lambda/100) turns out to be increased by a factor of 10^3.4 (resp. 10^5.1) when equipped with a hologram. Conclusions. This technique could provide direct imaging of an exo-Earth at a distance of 11 parsec with a 6.5m space telescope such as the JWST with the optical quality of the HST.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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