Darwin-GENIE: a nulling instrument at the VLTI

[en] Darwin is one of the most challenging space projects ever considered by the European Space Agency (ESA). Its principal objectives are to detect Earth-like planets around nearby stars and to characterise their atmospheres. Darwin is conceived as a space "nulling interferometer" which makes use of on-axis destructive interferences to extinguish the stellar light while keeping the off-axis signal of the orbiting planet. Within the frame of the Darwin program, the European Space Agency (ESA) and the European Southern Observatory (ESO) intend to build a ground-based technology demonstrator called GENIE (Ground based European Nulling Interferometry Experiment). Such a ground-based demonstrator built around the Very Large Telescope Interferometer (VLTI) in Paranal will test some of the key technologies required for the Darwin Infrared Space Interferometer. It will demonstrate that nulling interferometry can be achieved in a broad mid-IR band as a precursor to the next phase of the Darwin program. The instrument will operate in the L' band around 3.8 mum, where the thermal emission from the telescopes and the atmosphere is reduced. GENIE will be able to operate in two different configurations, i.e. either as a single Bracewell nulling interferometer or as a double-Bracewell nulling interferometer with an internal modulation scheme.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Gondoin, Philippe A

Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)

den Hartog, Roland H

Wilhelm, Rainer C

Gitton, Philippe B

D'Arcio, Luigi L

Fabry, Pierre

Puech, Florence

Fridlund, Malcolm C

Schoeller, Markus

More authors (7 more)

Language :

English

Title :

Darwin-GENIE: a nulling instrument at the VLTI

Publication date :

01 October 2004

Event name :

Astronomical Telescopes and Instrumentation 2004: New Frontiers in Stellar Interferometry

Event organizer :

SPIE

Event place :

Glasgow, United Kingdom

Event date :

du 21 au 25 juin 2004

Audience :

International

Main work title :

New Frontiers in Stellar Interferometry

Editor :

Traub, Wesley

Publisher :

SPIE, Bellingham, United States - Washington

Collection name :

Proceedings of the SPIE, volume 5491

Pages :

775

Additional URL :

http://adsabs.harvard.edu/abs/2004SPIE.5491..775G

Available on ORBi :

since 21 February 2011

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