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High contrast imaging with the JWST NIRCAM coronagraph

Green, Joseph J. and Beichman, Charles and Basinger, Scott A. and Horner, Scott and Meyer, Michael and Redding, David C. and Rieke, Marcia and Trauger, John T. (2005) High contrast imaging with the JWST NIRCAM coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets II. Proceedings of SPIE. No.5905. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 59050L.

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Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5μm 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 expected optical aberrations. Finally we show an example of a two-color image subtraction that can provide 10^(-5) companion sensitivity at sub-arcsecond separations.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Beichman, Charles0000-0002-5627-5471
Meyer, Michael0000-0003-1227-3084
Rieke, Marcia0000-0002-7893-6170
Additional Information:© 2005 Society of Photo-Optical Instrumentation Engineers (SPIE). The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. It was supported by a contract from the NIRCAM instrument project at the University of Arizona.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:Coronagraph, high contrast imaging, extrasolar planets, protoplanetary disks, NIRCAM, JWST
Series Name:Proceedings of SPIE
Issue or Number:5905
Record Number:CaltechAUTHORS:20180731-151510013
Persistent URL:
Official Citation:Joseph J. Green, Charles Beichman, Scott A. Basinger, Scott Horner, Michael Meyer, David C. Redding, Marcia Rieke, John T. Trauger, "High contrast imaging with the JWST NIRCAM coronagraph", Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 59050L (14 September 2005); doi: 10.1117/12.619343;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88408
Deposited By: George Porter
Deposited On:31 Jul 2018 22:31
Last Modified:16 Nov 2021 00:26

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