Physics – Optics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.357l..26v&link_type=abstract
Monthly Notices of the Royal Astronomical Society: Letters, Volume 357, Issue 1, pp. L26-L30.
Physics
Optics
12
Instrumentation: Adaptive Optics, Techniques: High Angular Resolution, Planetary Systems
Scientific paper
A comparison between pyramid-based and spatially filtered Shack-Hartmann-based high-order adaptive optics (AO) is presented in the framework of 8-m-class and extremely large telescopes (ELTs). We first show, with end-to-end simulations of an 8-m AO assisted telescope, how each sensor deals with the aliasing error, which may be the dominant error source at high flux. Then, focusing on photon noise error propagation, we study the field dependence of the sensitivity gain provided by the pyramid sensor with respect to the Shack-Hartmann sensor. From this analysis, we investigate, with an analytical model, visible correction on ELTs for detection of Earth-like exoplanets.
Carbillet Marcel
Korkiakoski Visa
Le Louarn Miska
Verinaud Christophe
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