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Communication Dans Un Congrès Année : 2019

Characterization of exoplanetary atmospheres with VLT-SPHERE

M. Bonnefoy
A. Boccaletti
G. Chauvin
S. Lacour
M. Nowak
  • Fonction : Auteur

Résumé

Around 4000 exoplanets have been confirmed during the last 20 years and thousands of other planets should be discovered during the next decade by the Gaia,TESS, CHEOPS and PLATO missions. The analysis of exoplanetary atmospheres provides clues on their formation and evolution, allowing to understand their diversity and ultimately to place the Solar System in context with respect to all other known planetary systems. There are currently two main ways to analyse the atmosphere of an exoplanet. First in the case of very short periods taking advantage of the transit depth modulation in time and wavelength, and second for young massive (∼10 Mjup) giant planets at large orbital separations (10-100 au) using high contrast direct imaging. In this context, the SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) instrument installed at the VLT (Beuzit et al. 2008, 2019) is a new generation high-contrast imaging instrument dedicated to the detection and spectroscopy of young giant exoplanets. First light was obtained in May 2014 and the instrument is on operation since February 2015. In section 2, we briefly described some characteristics of physics and chemistry of young giant planets. In section 3, we present the SPHERE instrument and results obtained during 5 years of operation. In section 4, we detail perspectives for the futur SPHERE upgrade its complementarity with GRAVITY.
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Dates et versions

hal-03039877 , version 1 (04-12-2020)

Identifiants

Citer

B. Charnay, M. Bonnefoy, A. Boccaletti, G. Chauvin, S. Lacour, et al.. Characterization of exoplanetary atmospheres with VLT-SPHERE. SF2A, Dec 2019, Virtuel, France. ⟨hal-03039877⟩
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