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Effects of atmospheric turbulence on the GENIE nulling interferometer

Published online by Cambridge University Press:  11 October 2004

C. Aime ,
R. Soummer  and
O. Absil
O. Absil*
Affiliation:
IAGL, University of Liège, B5C, 17 Allée du 6 Août, 4000 Sart-Tilman, Belgium
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Abstract

Two competitive design studies for the Ground-based European Nulling Interferometer Experiment(GENIE) have recently been initiated by the European Space Agency and the European SouthernObservatory. A major issue in these studies is the influence of atmospheric turbulence on theperformance of the instrument, and how atmospheric effects can be compensated in order to reach thegoal performance (detection of faint exozodiacal clouds). In this paper, we review the mainatmospheric processes affecting a nulling interferometer and discuss possible ways to reduce themby means of real-time control systems. Preliminary performance estimates of GENIE are thenpresented. The effects of the thermal background and its fluctuations (Absil & Bakker 2004) are notconsidered here.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 12: Astronomy with High Contrast Imaging II , 2004 , pp. 245 - 253
Copyright
© EAS, EDP Sciences, 2004

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