Precise Wavefront Correction with an Unbalanced Nulling Interferometer for Exo-Planet Imaging Coronagraphs
نویسندگان
چکیده
1 MIRA project, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan e-mail: [email protected] e-mail: [email protected] 2 Extrasolar Planet Project Office, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan 3 Division of Optical and Infrared Astronomy, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan 4 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
منابع مشابه
Speckle level suppression using an unbalanced nulling interferometer in a high-contrast imaging system.
High-contrast imaging systems with a stellar halo suppression level of 10(-10) are required for direct detection of Earth-like extra-solar planets. We investigated a novel high-contrast imaging system with an unbalanced nulling interferometer (UNI) followed by phase and amplitude correction (PAC), which not only can reduce starlight but also can suppress the speckle level caused by wavefront ab...
متن کاملExtreme coronagraphy with an adaptive hologram Simulations of exo-planet imaging
Aims. We present a solution to improve the performance of coronagraphs for the detection of exo-planets. Methods. We simulate numerically several kinds of coronagraphic systems, with the aim of evaluating the gain obtained with an adaptive hologram. Results. The detection limit in flux ratio between a star and a planet (Fs/Fp) observed with an apodized Lyot coronagraph characterized by wavefron...
متن کاملHigh-contrast Imaging from Space: Speckle Nulling in a Low Aberration Regime
High-contrast imaging from space must overcome two major noise sources to successfully detect a terrestrial planet angularly close to its parent star: photon noise from diffracted star light, and speckle noise from star light scattered by instrumentally-generated wavefront perturbation. Coronagraphs tackle only the photon noise contribution by reducing diffracted star light at the location of a...
متن کاملHypertelescopes and Exo-earth Coronagraphy
RESUME Hypertelescopes, or " multi-aperture densified-pupil imaging optical arrays" can provide direct images with full luminosity at arbitrary aperture dilution . They can be equipped with coronagraphic masks for difficult imaging situations such as the search for exo-Earths at infra-red and visible wavelengths . For detecting faint planets, down to 10 relative intensity, multi-stage coronagra...
متن کاملExperimental results from the optical planet detector interferometer
Researches have suggested several techniques (ie.: pupil masking, coronography, nulling interferometry) for high contrast imaging that permit the direct detection and characterization of extrasolar planets. Our team at JPL, in previous papers’,3, has described an instrument that will combine the best of several of these techniques: a single aperture visible nulling corograph. The elegant simpli...
متن کامل