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Proceedings Paper

Toward the stability required for direct observations of exoplanets with nulling interferometry
Author(s): Olivier Demangeon; Peter A. Schuller; Alain Léger; Philippe Duret
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Paper Abstract

In the literature you could find requirements for nulling IR interferometry in terms of nulling ratio nl and stability of this nulling ratio σnl for the observation of a exo-Earth gravitating at 1au of a solar type star located at 10pc from the Earth: nl = 10-5 between 7 and 20um and σnl = 3•10-9 over 10 days.1 These requirements are very demanding. We report on studies made to obtain the technological requirements in terms of nulling ratio and stability of this nulling ratio in function of the targeted planets and stars. Finally we will present methods of dithering developed for the NULLTIMATE testbench to achieve to the maximum stability.

Paper Details

Date Published: 21 July 2010
PDF: 14 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77342R (21 July 2010); doi: 10.1117/12.857209
Show Author Affiliations
Olivier Demangeon, Univ. Paris-Sud, Institut d'Astrophysique Spatiale, CNRS (France)
Peter A. Schuller, Univ. Paris-Sud, Institut d'Astrophysique Spatiale, CNRS (France)
Alain Léger, Univ. Paris-Sud, Institut d'Astrophysique Spatiale, CNRS (France)
Philippe Duret, Univ. Paris-Sud, Institut d'Astrophysique Spatiale, CNRS (France)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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