A5016337411- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- History and Developments in Astronomy
- Statistical and numerical algorithms
- Crystal Structures and Properties
- Impact of Light on Environment and Health
- Phase Equilibria and Thermodynamics
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Solar and Space Plasma Dynamics
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Solid-state spectroscopy and crystallography
Canadian Nautical Research Society
2024
Centre National de la Recherche Scientifique
2021-2023
Aix-Marseille Université
2021-2023
Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
2021-2022
Château Gombert
2022
Laboratoire d’Astrophysique de Marseille
2022
Université d'Orléans
2022
Laboratoire Chimie de l'Environnement
2021
To prepare for the analyses of future PLATO light curves, we develop a deep learning model to detect transits in high precision photometric curves. Since PLATO's main objective is detection temperate Earth-sized planets around solar-type stars, code designed individual transit events. The filtering step, required by conventional methods, can affect transit, which could be an issue long and shallow transits. protect shape depth, also work on unfiltered based Unet family architecture, but it...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD 88986 b, potentially transiting sub-Neptune, possessing longest period known small (<4 R ⊕ ) precise mass measurement ( σ M /M > 25%). Additionally, identified presence massive companion in wider orbit...
Abstract Short-period, low-mass water-rich planets are subject to strong irradiation from their host star, resulting in hydrospheres a supercritical state. In this context, we explore the role of on small terrestrial that moderately wet regime (0.2–1 M ⊕ ). We investigate bulk properties for water content 0.01–5% range by making use an internal structure model is coupled atmosphere model. This coupling allows us take into account both compression interior due weight hydrosphere and...
Context . Multi-planet systems are a perfect laboratory for constraining planetary formation models. A few of these present planets that come very close to mean motion resonance, potentially leading significant transit-timing variations (TTVs) due their gravitational interactions. Of systems, K2-138 represents an excellent studying the dynamics its six small (with radii ranging between ~1.5–3.3 R ⊕ ), as five innermost in near 3:2 resonant chain. Aims In this work, we aim constrain orbital...
Multi-planet systems are a perfect laboratory for constraining planetary formation models. A few of these present planets that come very close to mean motion resonance, potentially leading significant transit-timing variations (TTVs) due their gravitational interactions. Of systems, K2-138 represents excellent studying the dynamics its six small (with radii ranging between $\sim1.5$ -- $3.3 R_\oplus$), as five innermost in near 3:2 resonant chain. In this work, we aim constrain orbital...
To prepare for the analyses of future PLATO light curves, we develop a deep learning model, Panopticon, to detect transits in high precision photometric curves. Since PLATO's main objective is detection temperate Earth-size planets around solar-type stars, code designed individual transit events. The filtering step, required by conventional methods, can affect transit, which could be an issue long and shallow transits. protect shape depth, also work on unfiltered We trained model set...
We report the discovery of a super-Earth candidate orbiting nearby mid M dwarf Gl\,725A using radial velocity (RV) method. The planetary signal has been independently identified high-precision RVs from SOPHIE and SPIRou spectrographs, in optical near-infrared domains, respectively. modelled stellar activity jointly with planet two Gaussian Processes, one for each instrument to account chromaticity instrumental systematics, along Keplerian model. is significantly detected RV semi-amplitude...
We report the discovery of a super-Earth candidate orbiting nearby mid-M dwarf Gl\,725A using radial velocity (RV) method. The planetary signal has been independently identified high-precision RVs from SOPHIE and SPIRou spectrographs, in optical near-infrared (NIR) domains, respectively. modelled stellar activity jointly with planet two Gaussian processes, one for each instrument to account chromaticity instrumental systematics, along Keplerian model. was significantly detected RV...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD88986b, potentially transiting sub-Neptune, possessing longest period known small (< 4 R$_{\oplus}$) precise mass measurement ($\sigma_M/M$ > 25%). Additionally, identified presence massive companion in wider orbit...
&lt;p&gt;Water-rich planets should be ubiquitous in the universe, and could represent a notable fraction of sub-Neptune population. Among detected exoplanets that have been characterized as sub-Neptunes, many are subject to important irradiation from their host star. As consequence, hydrospheres such not condensed phase, but rather supercritical state, with steam atmospheres on top. Such irradiated ocean (IOP) good candidates explain distribution masses radii category...
&lt;p&gt;Short-period, low-mass planets have been found to often display inflated atmospheres [1]. Here, we investigate the interior structure of such with a moderate water budget using fully self-consistent planet model [2, 3], where can exist in supercritical state. This has done by increasing working range an existing model, allowing us explore 0.2-2.3 Earth mass range. We consider fractions (WMF) ranging from 0.01% 5% and irradiation temperatures between 500 2000K. Moreover,...
This work aims to determine the mass-radius rela-tionships of highly irradiated (500< Tirr
The LONSCAPE - Light Optical NephelometerSizer and Counter for Aerosols in Planetary Envi-ronments (Renard et al., 2020) has been proposed asa concept combining a particle counter with neph-elometer at several phase angles to characterize thescattering function obtain precise aerosol prop-erties (see Figure 1).LONSCAPE is currently considered as part ofthe science payload of balloon designed flyin the Venusian atmosphere (Baines 2021).LONSCAPE also be partof Saturn descentprobe concepts...