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Estimated performance of a symmetric nulling coronagraph for exoplanet imaging

机译:对称零位冠冕仪用于系外行星成像的估计性能

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摘要

The direct detection of the earth-similar planets nearby bright stars needs high-contrast imaging. We proposed a nulling coronagraph that can, in principle, totally cancel the on-axis point-source starlight for broadband high-contrast imaging. The nulling coronagraph also features close angular distance imaging and high throughput. Equipped with a telescope with only 1.5-m aperture size, it has the potentiality to be able to resolving and directly detecting earth-similar planets at 0.1″ (1 λ/D) close-distance in the visible wavelength range. The requirement for a small telescope is a significant advantage for future space missions. We discuss the working principle, instrument realization, error and sensitivity analysis, and the estimated performance of the nulling coronagraph.
机译:直接检测附近明亮恒星的类似地球的行星需要高对比度成像。我们提出了一种零位日冕仪,该仪原则上可以完全消除宽带高对比度成像的同轴点光源星光。归零冠冕仪还具有近角距离成像和高通量的特点。配备孔径孔径仅为1.5-m的望远镜,它有潜力能够分辨和直接检测可见波长范围内0.1“(1λ/ D)近距离的类似地球的行星。小型望远镜的需求是未来太空飞行的一大优势。我们讨论了工作原理,仪器实现,误差和灵敏度分析,以及归零电晕仪的估计性能。

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