Wavefront Correction for the Observation of an Exoplanet against the Background of the Diffraction Stellar Vicinity

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Abstract

We propose and investigate a precise wavefront correction method for the astronomical observation of exoplanets in the diffraction stellar vicinity. We show the applicability of the method for measuring and correcting the wavefront in the scheme of a telescope and an interferometric coronagraph without applying any Hartmann wavefront sensors. In our laboratory experiment we achieved a correction accuracy ~λ/50 and a coronagraphic contrast better than 105. We outline the prospects for increasing the correction accuracy to a target value of λ/500 to visualize the Earth in the vicinity of the Sun observed from a distance of 10 pc (in the immediate neighborhood of the Solar System) through an additional amplitude correction and the inclusion of non-common-path aberrations.

About the authors

A. V Yudaev

Space Research Institute, Russian Academy of Sciences

Email: yudaev@phystech.edu
117997, Moscow, Russia

I. A Shashkova

Space Research Institute, Russian Academy of Sciences

Email: yudaev@phystech.edu
117997, Moscow, Russia

A. V Kiselev

Space Research Institute, Russian Academy of Sciences

Email: yudaev@phystech.edu
117997, Moscow, Russia

A. A Komarova

Space Research Institute, Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: yudaev@phystech.edu
117997, Moscow, Russia; 141701, Dolgoprudny, Moscow oblast, Russia

A. V Tavrov

Space Research Institute, Russian Academy of Sciences

Author for correspondence.
Email: yudaev@phystech.edu
117997, Moscow, Russia

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