High-contrast coronagraph for ground-based imaging of Jupiter-like planets

Details High-contrast coronagraph for ground-based imaging of Jupiter-like planets High-contrast coronagraph for ground-based imaging of Jupiter-like planets

2009-10-28

arxiv.org/abs/0910.5355v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Scientific paper

We propose a high-contrast coronagraph for direct imaging of young Jupiter-like planets orbiting nearby bright stars. The coronagraph employs a step-transmission filter in which the intensity is apodized with a finite number of steps of identical transmission in each step. It should be installed on a large ground-based telescope equipped with state-of-the-art adaptive optics systems. In that case, contrast ratios around 10^-6 should be accessible within 0.1 arc seconds of the central star. In recent progress, a coronagraph with circular apodizing filter has been developing, which can be used for a ground-based telescope with central obstruction and spider structure. It is shown that ground-based direct imaging of Jupiter-like planets is promising with current technology.

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