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

Peter R. Lawson; Lisa Poyneer; Harrison Barrett; Richard Frazin; Luca Caucci; Nicholas Devaney; Lars Furenlid; Szymon Gładysz; Olivier Guyon; John Krist; Jérôme Maire; Christian Marois; Dimitri Mawet; David Mouillet; Laurent Mugnier; Iain Pearson; Marshall Perrin; Laurent Pueyo; Dmitry Savransky

doi:10.1117/12.925099

13 September 2012 On advanced estimation techniques for exoplanet detection and characterization using ground-based coronagraphs

Peter R. Lawson, Lisa Poyneer, Harrison Barrett, Richard Frazin, Luca Caucci, Nicholas Devaney, Lars Furenlid, Szymon Gładysz, Olivier Guyon, John Krist, Jérôme Maire, Christian Marois, Dimitri Mawet, David Mouillet, Laurent Mugnier, Iain Pearson, Marshall Perrin, Laurent Pueyo, Dmitry Savransky

Author Affiliations +

Proceedings Volume 8447, Adaptive Optics Systems III; 844722 (2012) https://doi.org/10.1117/12.925099
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

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Peter R. Lawson, Lisa Poyneer, Harrison Barrett, Richard Frazin, Luca Caucci, Nicholas Devaney, Lars Furenlid, Szymon Gładysz, Olivier Guyon, John Krist, Jérôme Maire, Christian Marois, Dimitri Mawet, David Mouillet, Laurent Mugnier, Iain Pearson, Marshall Perrin, Laurent Pueyo, and Dmitry Savransky "On advanced estimation techniques for exoplanet detection and characterization using ground-based coronagraphs", Proc. SPIE 8447, Adaptive Optics Systems III, 844722 (13 September 2012); https://doi.org/10.1117/12.925099

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