114 citations
- Université Côte d'AzurFR166 papers
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- Sorbonne UniversitéFR20 papers
- Laboratoire d'Informatique, Signaux et Systèmes de Sophia AntipolisFR19 papers
- Institut national de recherche en sciences et technologies du numériqueFR18 papers
- Université Paris CitéFR14 papers
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11 papers · 1 filter
Coherent Differential Imaging of high-contrast extended sources with VLT/SPHERE
Axel Potier, Raphaël Galicher, Pierre Baudoz +6
High-contrast imaging relies on advanced coronagraphs and adaptive optics (AO) to attenuate the starlight. However, residual aberrations, especially non-common path aberrations bet…
Increasing the sensitivity of stellar intensity interferometry with optical telescopes: First laboratory test of spectral multiplexing
S Tolila, G Labeyrie, R Kaiser +2
We present a preliminary laboratory test of a setup designed to measure Hanbury Brown and Twiss-type intensity correlations from a chaotic light source using five spectral channels…
Mid-order wavefront control for exoplanet imaging: preliminary characterization of the segmented deformable mirror and Zernike wavefront sensor on HiCAT
B. Buralli, M. N'Diaye, R. Pourcelot +13
We study a mid-order wavefront sensor (MOWFS) to address fine cophasing errors in exoplanet imaging with future large segmented aperture space telescopes. Observing Earth analogs a…
High-contrast detection of exoplanets with a kernel-nuller at the VLTI
Peter Marley Chingaipe, Frantz Martinache, Nick Cvetojevic +5
Context: The conventional approach to direct imaging has been the use of a single aperture coronagraph with wavefront correction via extreme adaptive optics. Such systems are limit…
Intensity Interferometry observations of the H envelope of Cas with MéO and a portable telescope
Nolan Matthews, Jean-Pierre Rivet, David Vernet +9
We report on observations of the extended environment of the bright Be star -Cas performed using intensity interferometry measurements within its H emission line. These obser…
Low-order wavefront control using a Zernike sensor through Lyot coronagraphs for exoplanet imaging: II. Concurrent operation with stroke minimization
R. Pourcelot, E. H. Por, M. N'Diaye +16
Wavefront sensing and control (WFSC) will play a key role in improving the stability of future large segmented space telescopes while relaxing the thermo-mechanical constraints on…