Pierre Baudoz
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View article: MIRI-JWST mid-infrared direct imaging of the debris disk of HD 106906
MIRI-JWST mid-infrared direct imaging of the debris disk of HD 106906 Open
Context . We report MIRI-JWST coronagraphic observations at 11.3 and 15.5 μm of the debris disk around the young star HD 106906. The wavelength range is sensitive to the thermal emission of the dust heated by the central star. Aims . The o…
View article: Extended linearity in the high-order wavefront sensor for the Roman Coronagraph
Extended linearity in the high-order wavefront sensor for the Roman Coronagraph Open
Context . The aim of the Coronagraphic Instrument (CGI) on board the Roman Space Telescope is to achieve unprecedented levels of contrast for the direct imaging of exoplanets, which will serve as a critical technology demonstrator for futu…
View article: Extended Linearity in the High-Order Wavefront Sensor for the Roman Coronagraph
Extended Linearity in the High-Order Wavefront Sensor for the Roman Coronagraph Open
Context. The Coronagraphic Instrument (CGI) on the Roman Space Telescope aims for unprecedented contrast for direct imaging of exoplanets, serving as a critical tech demo for future missions like the Habitable Worlds Observatory. This requ…
View article: Water depletion and <sup>15</sup>NH<sub>3</sub> in the atmosphere of the coldest brown dwarf observed with JWST/MIRI
Water depletion and <sup>15</sup>NH<sub>3</sub> in the atmosphere of the coldest brown dwarf observed with JWST/MIRI Open
Context. With a temperature of ∼285 K, WISEJ0855–0714 (hereafter, WISE 0855) is the coldest brown dwarf observed thus far. Studying such cold gas giants allows us to probe the atmospheric physics and chemistry of evolved objects that resem…
View article: First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs
First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs Open
Context . The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize their atmospheres. In particular, coronagraphs on b…
View article: First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs
First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs Open
The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize their atmospheres. In particular, coronagraphs on board the J…
View article: Water depletion and 15NH3 in the atmosphere of the coldest brown dwarf observed with JWST/MIRI
Water depletion and 15NH3 in the atmosphere of the coldest brown dwarf observed with JWST/MIRI Open
With a temperature of $\sim 285$ K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to characterize WISE0855s atmosphere focusing on vertical variation …
View article: Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI Open
Mid-infrared imaging of exoplanets and disks is now possible with the coronagraphs of the MIRI on the JWST. This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characteriz…
View article: Revisiting the Borde-Traub focal plane wavefront estimation technique for exoplanet direct imaging
Revisiting the Borde-Traub focal plane wavefront estimation technique for exoplanet direct imaging Open
Direct imaging of exoplanets relies on complex wavefront sensing and control architectures. In addition to fast adaptive optics systems, most of the future high-contrast imaging instruments will soon be equipped with focal plane wavefront …
Polarization effects on high contrast imaging: measurements on THD2 bench Open
The spectroscopic study of mature giant planets and low mass planets (Neptune-like, Earth-like) requires instruments capable of achieving very high contrasts ($10^{-10}-10^{-11}$) at short angular separations. To achieve such high performa…
View article: Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI Open
Context . Mid-infrared imaging of exoplanets and disks is now possible with the coronographs of the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST). This wavelength range unveils new features of young directly image…
View article: Prototyping liquid-crystal coronagraphs for exo-Earth imaging
Prototyping liquid-crystal coronagraphs for exo-Earth imaging Open
This paper presents initial results from the ESA-funded ``SUPPPPRESS'' project, which aims to develop high-performance liquid-crystal coronagraphs for direct imaging of Earth-like exoplanets in reflected light. The project focuses on addre…
View article: High contrast at small separation – III. Impact on the dark hole of MEMS deformable mirror control electronics
High contrast at small separation – III. Impact on the dark hole of MEMS deformable mirror control electronics Open
The creation of a dark hole (DH) region in the science image for exoplanet direct detection depends on deformable mirrors (DMs), where the imperfect control of DM limits the achievable contrast. The mirror surface height resolution is set …
View article: Direct imaging of exoplanets with JWST/MIRI
Direct imaging of exoplanets with JWST/MIRI Open
JWST has opened a completely new spectral range in the mid IR for the study of exoplanetary systems which promise to offer unprecedented results both in terms of characterization but also discovery space. Two observing modes in MIRI are of…
The MICADO first light imager for the ELT: sparse aperture masks, design, and simulations Open
MICADO, the European Extremely Large Telescope first light imager will feature a dedicated high contrast imaging mode specifically designed for observing and characterizing exoplanets and circumstellar disks. Two sparse aperture masks (SAM…
The MICADO first light imager for the ELT: testing the Lyot coronagraph prototypes Open
MICADO, the European Extremely Large Telescope first light imager will feature a dedicated high contrast imaging mode specifically designed for observing and characterizing exoplanets and circumstellar disks. Its improved sensitivity and a…
View article: Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST s MIRI coronagraph
Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST s MIRI coronagraph Open
The multi planet system HR8799 is the first target observed with MIRI's coronagraphs as part of the MIRI-EC Guaranteed Time Observations exoplanets programme in Nov. 2022. We obtained deep observations in three coronagraphic filters from 1…
View article: Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST’s MIRI coronagraph
Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST’s MIRI coronagraph Open
Context . The MIRI instrument on board JWST is now offering high-contrast imaging capacity at mid-IR wavelengths, thereby opening a completely new field of investigation for characterizing young exoplanetary systems. Aims . The multiplanet…
View article: Increasing the raw contrast of VLT/SPHERE with dark hole techniques III. Broadband reference differential imaging of HR\,4796 using a four-quadrant phase mask
Increasing the raw contrast of VLT/SPHERE with dark hole techniques III. Broadband reference differential imaging of HR\,4796 using a four-quadrant phase mask Open
Imaging exoplanetary systems is essential to characterizing exoplanetary systems and to studying planet-disk interactions to understand planet formation. Such imaging in the visible and near-infrared is challenging because these objects ar…
View article: Increasing the raw contrast of VLT/SPHERE with the dark hole technique
Increasing the raw contrast of VLT/SPHERE with the dark hole technique Open
Context . Imaging exoplanetary systems is essential to characterizing exoplanet atmospheres and orbits as well as circumstellar disks and to studying planet-disk interactions to understand the planet formation processes. Imaging exoplanets…
View article: Atmospheric properties of AF Lep b with forward modeling
Atmospheric properties of AF Lep b with forward modeling Open
Aims. We aim to expand the atmospheric exploration of AF Lep b by modeling all available observations obtained with SPHERE at VLT (between 0.95-1.65, at 2.105, and 2.253 $μ$m, and NIRC2 at Keck (at 3.8 $μ$m) with self-consistent atmospheri…
View article: Visible extreme adaptive optics on extremely large telescopes: towards detecting oxygen in Proxima Centauri b and analogs
Visible extreme adaptive optics on extremely large telescopes: towards detecting oxygen in Proxima Centauri b and analogs Open
editorial reviewed
View article: Integrated photonic-based coronagraphic systems for future space telescopes
Integrated photonic-based coronagraphic systems for future space telescopes Open
The detection and characterization of Earth-like exoplanets around Sun-like stars is a primary science motivation for the Habitable Worlds Observatory. However, the current best technology is not yet advanced enough to reach the 10−10 cont…
View article: Integrated photonic-based coronagraphic systems for future space telescopes
Integrated photonic-based coronagraphic systems for future space telescopes Open
The detection and characterization of Earth-like exoplanets around Sun-like stars is a primary science motivation for the Habitable Worlds Observatory. However, the current best technology is not yet advanced enough to reach the 10^-10 con…
View article: Visible extreme adaptive optics on extremely large telescopes: Towards detecting oxygen in Proxima Centauri b and analogs
Visible extreme adaptive optics on extremely large telescopes: Towards detecting oxygen in Proxima Centauri b and analogs Open
Looking to the future of exo-Earth imaging from the ground, core technology developments are required in visible extreme adaptive optics (ExAO) to enable the observation of atmospheric features such as oxygen on rocky planets in visible li…
View article: Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory
Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory Open
NASA is engaged in planning for a Habitable Worlds Observatory (HabWorlds ), a coronagraphic space mission to detect rocky planets in habitable zones and establish their habitability. Surface liquid water is central to the definition of pl…
View article: Data for "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory"
Data for "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory" Open
Data for the paper on "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory"
View article: Data for "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory"
Data for "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory" Open
Data for the paper on "Chasing rainbows and ocean glints: Inner working angle constraints for the Habitable Worlds Observatory"