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Simulating the effects of exozodiacal dust in WFIRST CGI observations
Author(s): Ewan S. Douglas; John Debes; Kian Milani; Yinzi Xin; Kerri L. Cahoy; Nikole K. Lewis; Bruce Macintosh
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Paper Abstract

The WFIRST Coronagraph Instrument (CGI) will image the environment close to stars at orders of magnitude higher sensitivity than current observatories. In addition to directly imaging giant exoplanets, WFIRST CGI has unprecedented sensitivity to scattered light from circumstellar dust. Most modeling has been confined to the dark-hole regime of the coronagraph (approximately 0.15 arcsec to 1 arcsec). This work uses publicly available field-dependent point spread functions to model an exozodiacal disk within the 0.15 arcsec inner working angle. For this simple Solar System-like test case, we find an approximately 25% increase in the transmitted exozodiacal flux due to light inside the inner working angle. We also describe plans to accelerate and extend this modeling to a wider range of geometries, and to quantify the impact on post-processing and source detection.

Paper Details

Date Published: 9 September 2019
PDF: 6 pages
Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111170K (9 September 2019); doi: 10.1117/12.2529488
Show Author Affiliations
Ewan S. Douglas, The Univ. of Arizona (United States)
John Debes, Space Telescope Science Institute (United States)
Kian Milani, The Univ. of Arizona (United States)
Yinzi Xin, Massachusetts Institute of Technology (United States)
Kerri L. Cahoy, Massachusetts Institute of Technology (United States)
Nikole K. Lewis, Cornell Univ. (United States)
Bruce Macintosh, Stanford Univ. (United States)


Published in SPIE Proceedings Vol. 11117:
Techniques and Instrumentation for Detection of Exoplanets IX
Stuart B. Shaklan, Editor(s)

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