Configurations of a Nulling Space Interferometer for the Search for Extrasolar Planets

Details Configurations of a Nulling Space Interferometer for the Search for Extrasolar Planets Configurations of a Nulling Space Interferometer for the Search for Extrasolar Planets

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.670k&link_type=abstract

IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,

Physics

Optics

Scientific paper

The direct detection of a planet close to its parent star is challenging because the signal detected from the parent star is between 109 and 106 times brighter than the signal of a planet in the visual and IR respectively. Future space based missions like DARWIN and TPF concentrate on the region between 6μm to 18μm, a region that contain the CO2, H2O, O3 spectral features of the atmosphere. The concepts for space nulling interferometers and the influence of different schemes of beam combination on the detected signal is investigated. Considering the background contribution to the detected signal, the region where the detection sensitivity should be maximised is identified. The use of integrated optics to combine the spectral channels is discussed. The resulting transmission maps are evaluated on base of the symmetry, rejection values, null depth and applications for extra- solar planet search.

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