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High contrast imaging with the JWST NIRCAM coronagraph.

Show simple item record Green, Joseph J. Beichman, Charles Basinger, Scott A. Horner, Scott Meyer, Michael Redding, David C. Rieke, Marcia Trauger, John T. 2009-04-08T19:39:57Z 2009-04-08T19:39:57Z 2005-07-31
dc.identifier.citation SPIE 50th Annual Meeting and Optics & Photonics Conference, San Diego, California, July 31 - August 4, 2005. en_US
dc.identifier.clearanceno 05-1955
dc.description.abstract Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5pm wavelength range where brown dwarfs and hot Jupiters are thought to have significant brightness enhancements. To facilitate high contrast imaging within this band, the Near-Infrared Camera (NIRCAM) will employ a Lyot coronagraph with an array of band-limited image-plane occulting spots. In this paper, we provide the science motivation for high contrast imaging with NIRCAM, comparing its expected performance to that of the Keck, Gemini and 30 m (TMT) telescopes equipped with Adaptive Optics systems of different capabilities. We then describe our design for the NIRCAM coronagraph that enables imaging over the entire sensitivity range of the instrument while providing significant operational flexibility. We describe the various design tradeoffs that were made in consideration of alignment and aberration sensitivities and present contrast performance in the presence of JWST's expectcd optical aberrations. Finally we show an example of a that can provide 10-5 companion sensitivity at sub-arcsecond separations. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005. en_US
dc.subject James Webb Space Telescope (JWST) en_US
dc.subject Near Infrared Camera (NIRCAM) en_US
dc.subject coronagraph en_US
dc.subject high contrast imaging en_US
dc.subject extrasolar planets en_US
dc.subject protoplanetary disks en_US
dc.title High contrast imaging with the JWST NIRCAM coronagraph. en_US
dc.type Preprint en_US

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