Comparison of methods for detection and characterization of exoplanets with SPHERE/IRDIS

A. Vigan; C. Moutou; M. Langlois; D. Mouillet; K. Dohlen; A. Boccaletti; M. Carbillet; I. Smith; A. Ferrari; L. Mugnier; C. Thalmann

doi:10.1117/12.856701

15 July 2010 Comparison of methods for detection and characterization of exoplanets with SPHERE/IRDIS

A. Vigan, C. Moutou, M. Langlois, D. Mouillet, K. Dohlen, A. Boccaletti, M. Carbillet, I. Smith, A. Ferrari, L. Mugnier, C. Thalmann

Author Affiliations +

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77352X (2010) https://doi.org/10.1117/12.856701
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

SPHERE is a second generation instrument for the Very Large Telescope (VLT) which will aim at directly detecting the intrinsic flux of young giant exoplanets thanks to a dedicated extreme adaptive optics system and coronagraphs. Exoplanet detection in the near-infrared will be performed in parallel with an integral field spectrograph and a differential imager, IRDIS. IRDIS main mode for exoplanet detection will be Dual- Band Imaging (DBI) where two images are acquired simultaneously at close wavelengths around expected sharp features in cold planetary objects spectra. We present here the end-to-end simulations performed to obtain realistic data for IRDIS in DBI mode with temporal evolution of the quasi-static speckle pattern. Data cubes have been generated to represent 4 hour observations in IRDIS filter pairs for various star magnitudes and planets at angular separations from 0."2 to 2".0. Using this unique set of data, we present a comparison of various data analysis methods for high-contrast imaging with IRDIS in DBI mode both in terms of detection limits and of estimation of the exoplanet flux after speckle noise attenuation.

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A. Vigan, C. Moutou, M. Langlois, D. Mouillet, K. Dohlen, A. Boccaletti, M. Carbillet, I. Smith, A. Ferrari, L. Mugnier, and C. Thalmann "Comparison of methods for detection and characterization of exoplanets with SPHERE/IRDIS", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352X (15 July 2010); https://doi.org/10.1117/12.856701

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