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Proceedings Paper

On advanced estimation techniques for exoplanet detection and characterization using ground-based coronagraphs
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Paper Abstract

The direct imaging of planets around nearby stars is exceedingly difficult. Only about 14 exoplanets have been imaged to date that have masses less than 13 times that of Jupiter. The next generation of planet-finding coronagraphs, including VLT-SPHERE, the Gemini Planet Imager, Palomar P1640, and Subaru HiCIAO have predicted contrast performance of roughly a thousand times less than would be needed to detect Earth-like planets. In this paper we review the state of the art in exoplanet imaging, most notably the method of Locally Optimized Combination of Images (LOCI), and we investigate the potential of improving the detectability of faint exoplanets through the use of advanced statistical methods based on the concepts of the ideal observer and the Hotelling observer. We propose a formal comparison of techniques using a blind data challenge with an evaluation of performance using the Receiver Operating Characteristic (ROC) and Localization ROC (LROC) curves. We place particular emphasis on the understanding and modeling of realistic sources of measurement noise in ground-based AO-corrected coronagraphs. The work reported in this paper is the result of interactions between the co-authors during a week-long workshop on exoplanet imaging that was held in Squaw Valley, California, in March of 2012.

Paper Details

Date Published: 13 September 2012
PDF: 21 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 844722 (13 September 2012); doi: 10.1117/12.925099
Show Author Affiliations
Peter R. Lawson, Jet Propulsion Lab. (United States)
Lisa Poyneer, Lawrence Livermore National Lab. (United States)
Harrison Barrett, College of Optical Sciences, The Univ. of Arizona (United States)
Richard Frazin, Univ. of Michigan (United States)
Luca Caucci, College of Optical Sciences, The Univ. of Arizona (United States)
Nicholas Devaney, National Univ. of Ireland, Galway (Ireland)
Lars Furenlid, College of Optical Sciences, The Univ. of Arizona (United States)
Szymon Gładysz, Fraunhofer Institute (Germany)
Olivier Guyon, Steward Observatory, The Univ. of Arizona (United States)
Subaru Telescope, National Astronomical Observatory of Japan (United States)
John Krist, Jet Propulsion Lab. (United States)
Jérôme Maire, David Dunlap Institute, Univ. of Toronto (Canada)
Christian Marois, NRC Herzberg Institute of Astrophysics (Canada)
Dimitri Mawet, European Southern Observatory (Chile)
David Mouillet, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Laurent Mugnier, ONERA (France)
Iain Pearson, College of Optical Sciences, The Univ. of Arizona (United States)
Marshall Perrin, Space Telescope Science Institute (United States)
Laurent Pueyo, Johns Hopkins Univ. (United States)
Dmitry Savransky, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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