Share Email Print
cover

Proceedings Paper

Comparison of methods for detection and characterization of exoplanets with SPHERE/IRDIS
Author(s): A. Vigan; C. Moutou; M. Langlois; D. Mouillet; K. Dohlen; A. Boccaletti; M. Carbillet; I. Smith; A. Ferrari; L. Mugnier; C. Thalmann
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 16 July 2010
PDF: 12 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352X (16 July 2010); doi: 10.1117/12.856701
Show Author Affiliations
A. Vigan, Lab. d'Astrophysique de Marseille, CNRS, Univ. de Provence (France)
C. Moutou, Lab. d'Astrophysique de Marseille, CNRS, Univ. de Provence (France)
M. Langlois, Ctr. de Recherche Astrophysique de Lyon, CNRS, Univ. Claude-Bernard Lyon I (France)
D. Mouillet, Lab. d'Astrophysique de l'Observatoire de Grenoble, CNRS, Univ. Joseph Fourier (France)
K. Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Univ. de Provence (France)
A. Boccaletti, Observatoire de Paris-Meudon (France)
M. Carbillet, Lab. Fizeau, CNRS, Univ. de Nice Sophia Antipolis (France)
I. Smith, Lab. Fizeau, CNRS, Univ. de Nice Sophia Antipolis (France)
A. Ferrari, Lab. Fizeau, CNRS, Univ. de Nice Sophia Antipolis (France)
L. Mugnier, ONERA (France)
C. Thalmann, Max-Planck-Institut für Astronomie (Germany)


Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

© SPIE. Terms of Use
Back to Top