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July 2013 (v1)Journal articleUploaded on: December 4, 2022
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July 2013 (v1)Journal article
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Uploaded on: February 22, 2023 -
July 2013 (v1)Journal article
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Uploaded on: December 4, 2022 -
December 1, 2020 (v1)Publication
In the context of high contrast imaging, we propose to evaluate the performance of the Apodized Pupil Lyot Coronagraph (APLC) working without Lyot Stop, namely Stop-less Lyot Coronagraph (SLLC). This coronagraph is a combination of an entrance pupil apodizer and an opaque mask in the following focal plane. However, contrary to APLC, SLLC is...
Uploaded on: December 4, 2022 -
February 1, 2015 (v1)Journal article
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February 2012 (v1)Journal article
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October 2019 (v1)Journal article
The James Webb Space Telescope will offer high-angular resolution observing capability in the near-infrared with masking interferometry on NIRISS, and coronagraphic imaging on NIRCam & MIRI. Full aperture kernel-phase based interferometry complements these observing modes, probing for companions at small separations while preserving the...
Uploaded on: December 3, 2022 -
August 6, 2017 (v1)Conference paper
Obstructions due to large secondary mirrors, primary mirror segmentation, and secondary mirror support struts all introduce diffraction artifacts that limit the performance offered by coronagraphs. However, just as vortex coronagraphs provides theoretically ideal cancellation of on-axis starlight for clear apertures, the Polynomial Apodized...
Uploaded on: March 25, 2023 -
December 14, 2020 (v1)Conference paper
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June 22, 2014 (v1)Conference paper
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June 26, 2016 (v1)Conference paper
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Uploaded on: December 4, 2022 -
February 20, 2016 (v1)Journal article
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Uploaded on: December 4, 2022 -
December 14, 2020 (v1)Conference paper
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Uploaded on: December 4, 2022 -
July 2023 (v1)Journal articleTrade-offs in high-contrast integral field spectroscopy for exoplanet detection and characterisation
Context. Combining high-contrast imaging with medium- or high-resolution integral field spectroscopy has the potential to boost the detection rate of exoplanets, especially at small angular separations. Furthermore, it immediately provides a spectrum of the planet that can be used to characterise its atmosphere. The achievable spectral...
Uploaded on: November 25, 2023 -
January 1, 2016 (v1)Journal article
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July 17, 2022 (v1)Conference paper
Kernel phase is a method to interpret stellar point source images by considering their formation as the analytical result of an interferometric process. Using Fourier formalism, this method allows for observing planetary companions around nearby stars at separations down to half a telescope resolution element, typically 20 mas for a 8m class...
Uploaded on: December 3, 2022 -
December 1, 2020 (v1)Publication
The increasing complexity of the aperture geometry of the future space- and ground based-telescopes will limit the performance of the next generation of coronagraphic instruments for high contrast imaging of exoplanets. We propose here a new closed-loop optimization technique using two deformable mirrors to correct for the effects of complex...
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June 10, 2018 (v1)Conference paper
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July 6, 2017 (v1)Conference paper
Segmented telescopes enable large-aperture space telescopes for the direct imaging and spectroscopy of habitable worlds. However, the increased complexity of their aperture geometry, due to their central obstruction, support structures, and segment gaps, makes high-contrast imaging very challenging. In this context, we present an analytical...
Uploaded on: March 25, 2023 -
April 2020 (v1)Journal article
Context. Kernel phase is a data analysis method based on a generalization of the notion of closure phase, which was invented in the context of interferometry, but it applies to well corrected diffraction dominated images produced by an arbitrary aperture. The linear model upon which it relies theoretically leads to the formation of observable...
Uploaded on: December 4, 2022 -
August 2023 (v1)Journal article
Context. The conventional approach to direct imaging is to use a single aperture coronagraph with wavefront correction via extreme adaptive optics (AO). Such systems are limited to observing beyond an inner working angle (IWA) of a few λ / D. Nulling interferometry with two or more apertures will enable detections of companions at separations...
Uploaded on: November 25, 2023 -
June 10, 2018 (v1)Conference paper
Direct imaging and spectroscopy of Earth-like planets will require high-contrast imaging at very close angular separation: 1e10 star to planet ux ratio at a few tenths of an arcsecond. Large telescopes in space are necessary to provide sufficient collecting area and angular resolution to achieve this goal. In the static case, coronagraphic...
Uploaded on: December 4, 2022 -
June 10, 2018 (v1)Conference paper
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Uploaded on: December 4, 2022 -
August 11, 2019 (v1)Conference paper
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Uploaded on: December 4, 2022