Context. With a clear circular aperture, the vortex coronagraph perfectly cancels an on-axis
point source and offers a 0.9 or 1.75λ/D inner working angle for topological charge 2 or 4 …

The WFIRST-AFTA 2.37 m telescope will provide the opportunity to host a coronagraph for
the imaging and spectroscopy of planets and disks in the next decade. The telescope …

Rotational mapping and specular reflection (glint) are two proposed methods to directly
detect liquid water on the surface of habitable exoplanets. However, false positives for both …

The Fast Linearized Coronagraph Optimizer (FALCO) is an open-source toolbox of routines
for coronagraphic focal plane wavefront correction. The goal of FALCO is to provide a free …

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. The vortex coronagraph is an optical instrument that precisely removes on-axis
starlight allowing for high contrast imaging at small angular separation from the star, a …

We introduce a new class of solutions for Apodized Pupil Lyot Coronagraphs (APLC) with
segmented aperture telescopes to remove broadband diffracted light from a star with a …

The prospect of extreme high-contrast astronomical imaging from space has inspired
developments of new coronagraph methods for exoplanet imaging and spectroscopy …

Coronagraphs of the apodized pupil and shaped pupil varieties use the Fraunhofer
diffraction properties of amplitude masks to create regions of high contrast in the vicinity of a …

The Wide-Field Infrared Survey Telescope (WFIRST) is a NASA observatory concept, now in
phase A study, which is designed to perform wide-field imaging and slitless spectroscopic …