Apodized phase mask coronagraphs for arbitrary apertures-ii. comprehensive review of solutions for the vortex coronagraph
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 …
point source and offers a 0.9 or 1.75λ/D inner working angle for topological charge 2 or 4 …
Imaging exoplanets with coronagraphic instruments
R Galicher, J Mazoyer - Comptes …, 2023 - comptes-rendus.academie-sciences …
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 …
encore ouvertes: comment les systèmes planétaires se forment-ils et évoluent-ils; pourquoi …
High performance Lyot and PIAA coronagraphy for arbitrarily shaped telescope apertures
Two high-performance coronagraphic approaches compatible with segmented and
obstructed telescope pupils are described. Both concepts use entrance pupil amplitude …
obstructed telescope pupils are described. Both concepts use entrance pupil amplitude …
Apodized pupil Lyot coronagraphs for arbitrary apertures. V. Hybrid shaped pupil designs for imaging Earth-like planets with future space observatories
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 …
segmented aperture telescopes to remove broadband diffracted light from a star with a …
Apodized pupil Lyot coronagraphs for arbitrary apertures. IV. Reduced inner working angle and increased robustness to low-order aberrations
ABSTRACT The Apodized Pupil Lyot Coronagraph (APLC) is a diffraction suppression
system installed in the recently deployed instruments Palomar/P1640, Gemini/GPI, and …
system installed in the recently deployed instruments Palomar/P1640, Gemini/GPI, and …
Analytical determination of orbital elements using Fourier analysis-II. Gaia astrometry and its combination with radial velocities
JB Delisle, D Ségransan - Astronomy & Astrophysics, 2022 - aanda.org
The ESA global astrometry space mission Gaia has been monitoring the position of a billion
stars since 2014. The analysis of such a massive dataset is challenging in terms of the data …
stars since 2014. The analysis of such a massive dataset is challenging in terms of the data …
Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy
On large ground-based telescopes, the combination of extreme adaptive optics (ExAO) and
coronagraphy with high-dispersion spectroscopy (HDS), sometimes referred to as high …
coronagraphy with high-dispersion spectroscopy (HDS), sometimes referred to as high …
High-contrast imaging in polychromatic light with the self-coherent camera
J Mazoyer, P Baudoz, R Galicher… - Astronomy & Astrophysics, 2014 - aanda.org
Context. In the context of direct imaging of exoplanets, coronagraphs are commonly
proposed to reach the required very high contrast levels. However, wavefront aberrations …
proposed to reach the required very high contrast levels. However, wavefront aberrations …
Focal plane wavefront sensor achromatization: The multireference self-coherent camera
JR Delorme, R Galicher, P Baudoz, G Rousset… - Astronomy & …, 2016 - aanda.org
Context. High contrast imaging and spectroscopy provide unique constraints for exoplanet
formation models as well as for planetary atmosphere models. But this can be challenging …
formation models as well as for planetary atmosphere models. But this can be challenging …
Calibration of residual aberrations in exoplanet imagers with large numbers of degrees of freedom
Imaging faint objects, such as exoplanets or disks, around nearby stars is extremely
challenging because host star images are dominated by the telescope diffraction pattern …
challenging because host star images are dominated by the telescope diffraction pattern …