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Proceedings Paper

Spectral contrast enhancement techniques for extrasolar planet imaging
Author(s): Tilak Hewagama; Richard B. Barclay; Tina C. Chen; Drake Deming; Cedric Goukenleuque; Matthew A. Greenhouse; Ross Henry; Mindy Jacobson; Brent Mott; Shobita Satyapal; David Scott Schwinger
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Paper Abstract

We use analytical models to characterize the optical response of observing systems and explore spectroscopic techniques that exploit the planetary spectral signature to enhance the planet-to-star contrast in imaging. Radiative transfer model calculations of gas-giant extrasolar planets are employed in selecting spectral regions where the planetary signal shows enhancement with respect to the stellar spectrum. We specifically discuss the use of frequency switching, in conjunction with pupil plane techniques (shaping, apodizing), to optimize the detection of the planetary signal of potential planetary systems for both ground-based and space-borne observations. Expected properties of known extrasolar planets motivate the use of the near-IR spectral region. This work was motivated by the focused technology development of a MEMS tunable filter, and the application of such devices to frequency-switched imaging spectroscopy.

Paper Details

Date Published: 3 March 2003
PDF: 6 pages
Proc. SPIE 4860, High-Contrast Imaging for Exo-Planet Detection, (3 March 2003); doi: 10.1117/12.457834
Show Author Affiliations
Tilak Hewagama, Univ. of Maryland/College Park (United States)
Richard B. Barclay, NASA Goddard Space Flight Ctr. (United States)
Tina C. Chen, Global Science & Technology, Inc. (United States)
NASA Goddard Space Flight Ctr. (United States)
Drake Deming, NASA Goddard Space Flight Ctr. (United States)
Cedric Goukenleuque, NASA Goddard Space Flight Ctr. (United States)
Matthew A. Greenhouse, NASA Goddard Space Flight Ctr. (United States)
Ross Henry, NASA Goddard Space Flight Ctr. (United States)
Mindy Jacobson, NASA Goddard Space Flight Ctr. (United States)
Brent Mott, NASA Goddard Space Flight Ctr. (United States)
Shobita Satyapal, George Mason Univ. (United States)
David Scott Schwinger, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4860:
High-Contrast Imaging for Exo-Planet Detection
Alfred B. Schultz; Richard G. Lyon, Editor(s)

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