High resolution imaging with Fresnel interferometric arrays: suitability for exoplanet detection
We propose a new kind of interferometric array that yields images of high dynamic range and large field. The numerous individual apertures in this array form a pattern related to a Fresnel zone plate. This array can be used for astrophysical imaging over a broad spectral bandwidth spanning from the UV (50 nanometers) to the IR (20 μm). Due to the long focal lengths involved, this instrument requires formation-flying of two space borne vessels. We present the concept and study the S/N ratio in different situations, then apply these results to probe the suitability of this concept to detect exoplanets.
Astronomy and Astrophysics
- Pub Date:
- November 2005
- instrumentation: interferometers;
- planetary systems;
- 12 pages, 19 figures, to be published in A&