L'exoplanétologie est un domaine très actif de l'astronomie moderne avec des questions
encore ouvertes: comment les systèmes planétaires se forment-ils et évoluent-ils; pourquoi …

Context. Exoplanet direct imaging is a key science goal of current ground-based telescopes
as well as of future ground-based extremely large telescopes and space-based telescopes …

We present a new method to achieve high-contrast images using segmented and/or on-axis
telescopes. Our approach relies on using two sequential deformable mirrors (DMs) to …

Context. Fewer than 1% of all exoplanets detected to date have been characterized on the
basis of spectroscopic observations of their atmosphere. Unlike indirect methods, high …

Detection and characterization of Earth-like planets around nearby stars using the direct
imaging technique is a key scientific objective of future NASA astrophysics flagship …

High-contrast imaging instruments are now being equipped with integral field spectrographs
(IFSs) to facilitate the detection and characterization of faint substellar companions …

The search for biosignatures in potentially habitable exoplanets is one of the major
astrophysics' drivers for the coming decades, and the prime science goal of the HWO NASA …

The estimation and compensation of quasi-static aberrations is mandatory to reach the
ultimate performance of high-contrast imaging systems. COFFEE is a focal plane wave-front …

Context. Direct imaging of exoplanets requires very high contrast levels, which are obtained
using coronagraphs. But residual quasi-static aberrations create speckles in the focal plane …

Direct imaging and spectral characterization of exoplanets using extreme adaptive optics
(ExAO) is a key science goal of future extremely large telescopes and space observatories …