Gain estimate for exoplanet detection with adaptive optics

Details Gain estimate for exoplanet detection with adaptive optics Gain estimate for exoplanet detection with adaptive optics

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..145..445c&link_type=abstract

Astronomy and Astrophysics Supplement, v.145, p.445-449

Astronomy and Astrophysics

Astrophysics

3

Atmospheric Effects, Techniques: Image Processing, Telescopes

Scientific paper

Atmospheric turbulence imposes the resolution limit attainable by large ground-based telescopes. Adaptive optics systems can compensate turbulence-induced distortions. One of the most difficult task for telescopes assisted by adaptive optics systems is the detection of extrasolar planets since a compensation level higher than in other applications is needed. In this context, the gain of the system (ratio between the peak and the halo intensity) gives a good description of the system performance. A way to theoretically estimate the system gain and a technique to estimate it from the measurement of the experimental Strehl ratio are developed using a single model of the PSF of compensated wavefronts. From it, the integration time required to detect a Jupiter-like planet is derived from the number of system actuators and the atmospheric conditions.

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