Limitations to the detection of Earth-like planets with Extremely Large Telescopes

Details Limitations to the detection of Earth-like planets with Extremely Large Telescopes Limitations to the detection of Earth-like planets with Extremely Large Telescopes

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sf2a.conf..231c&link_type=abstract

SF2A-2005: Semaine de l'Astrophysique Francaise, meeting held in Strasbourg, France, June 27 - July 1, 2005, Edited by F. Casoli

Astronomy and Astrophysics

Astrophysics

Scientific paper

Extremely large telescopes are considered very promising instruments to detect and characterise Earth-like planets from the ground. Here, we analyse the limitations in terms of phase aberrations. Using numerical simulations we demonstrate that the detection is fundamentally limited by the static aberrations which cannot be neglected at this level of contrast. To achieve a detection threshold of 10-10 at 5σ the static aberrations must be calibrated at 10 picometers which can be considered very challenging especially from the ground. The situation is worse when the photon noise is taken into account.

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