T. Guillot
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View article: A 43 day transiting Neptune and two 25 day Saturns from TESS, NGTS and ASTEP
A 43 day transiting Neptune and two 25 day Saturns from TESS, NGTS and ASTEP Open
Beyond orbital periods of 10 days, there is a dearth of known transiting gas giants. On longer orbits, planets are less affected by their host star, and become ideal probes of planet formation, migration and evolution. We report the discov…
View article: TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain
TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain Open
We report the confirmation and initial characterization of a compact and dynamically rich multiple giant planet system orbiting the solar analog TOI-7510. The system was recently identified as a candidate two-planet system in a machine-lea…
View article: ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-minute TESS Data
ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-minute TESS Data Open
We present ExoMiner++ , an enhanced deep learning model that builds on the success of ExoMiner to improve transit signal classification in 2-minute TESS data. ExoMiner++ incorporates additional diagnostic inputs, including periodogram, flu…
View article: High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates
High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates Open
We present the analysis of five long-period TESS Objects of Interest (TOIs), each with orbital periods exceeding one month. Initially identified by the Transiting Exoplanet Survey Satellite (TESS), we extensively monitored these targets wi…
View article: Quantification of Tides in Giant Planets from Observations
Quantification of Tides in Giant Planets from Observations Open
Quantifying tidal effects on giant planets has recently made significant advances, thanks in particular to the Cassini space probe. During its thirteen-year orbit around Saturn, numerous measurements from different instruments made it poss…
View article: A Cold and Super-Puffy Planet on a Prograde Orbit
A Cold and Super-Puffy Planet on a Prograde Orbit Open
We report the discovery of TOI-4507 b, a transiting sub-Saturn with a density $<$ 0.2 g/cm$^3$ on a 105-day prograde orbit around a 700 Myr old F star. The transits were detected using data from TESS as well as the Antarctic telescope ASTE…
View article: How clear are the skies of WASP-80b?: 3D Cloud feedback on the atmosphere and spectra of the warm Jupiter
How clear are the skies of WASP-80b?: 3D Cloud feedback on the atmosphere and spectra of the warm Jupiter Open
Close-in warm Jupiters orbiting M-dwarf stars are expected to exhibit diverse atmospheric chemistry, with clouds playing a key role in shaping their albedo, heat distribution, and spectral properties. We study WASP-80b, a warm Jupiter orbi…
View article: Solar models with protosolar accretion and turbulent mixing
Solar models with protosolar accretion and turbulent mixing Open
Context. Over the last two decades, no standard solar model (SSM) has been able to reproduce all observational data, resulting in active discussions regarding the so-called solar modeling problem. A recent study suggests that the accretion…
View article: Internal Heat Flux and Energy Imbalance of Uranus
Internal Heat Flux and Energy Imbalance of Uranus Open
With its extreme axial tilt, Uranus' radiant energy budget (REB) and internal heat flux remain among the most intriguing mysteries in our solar system. By combining observations with modeling, we present the global REB over a complete orbi…
View article: The shape of Jupiter redefined by Juno
The shape of Jupiter redefined by Juno Open
Jupiter, the fastest-rotating planet in the Solar System, exhibits a pronounced equatorial bulge, with its equatorial radius exceeding the polar radius by approximately 7%. This oblate shape reflects the combined effects of rapid rotation,…
View article: Unlocking the Secrets of Ice Giant Formation : The Role of Argon Isotopes in Decoding Uranus and Neptune's Composition
Unlocking the Secrets of Ice Giant Formation : The Role of Argon Isotopes in Decoding Uranus and Neptune's Composition Open
Understanding the formation and bulk composition of Uranus and Neptune remains one of the outstanding challenges in planetary science. These ice giants likely formed in a region of the protosolar nebula where both rocky and icy solids were…
View article: A comprehensive picture about Jovian clouds and hazes from Juno/JIRAM infrared spectral data
A comprehensive picture about Jovian clouds and hazes from Juno/JIRAM infrared spectral data Open
Jupiter, the largest planet in our solar system, is a vital reference point for understanding gaseous exoplanets and their atmospheres. While we know its upper tropospheric chemical composition well, the nature and structure of its clouds …
View article: Moist convection inhibition and its consequences for exoplanets
Moist convection inhibition and its consequences for exoplanets Open
Convection governs the structure, interior temperatures and cooling of planets. When condensation occurs, the release of latent heat can lead to a more efficient heat transport. This situation is natural for us, as it occurs in the Earth a…
View article: Late gas released in the young Kuiper Belt could have significantly contributed to the carbon enrichment of the atmospheres of Neptune and Uranus.
Late gas released in the young Kuiper Belt could have significantly contributed to the carbon enrichment of the atmospheres of Neptune and Uranus. Open
Late gas released in the young Kuiper Belt could have significantly contributed to the carbon enrichment of the atmospheres of Neptune and Uranus.Even before the observation of planets in extrasolar systems, there were numerous observation…
View article: The Future of Solar Modelling: Requirements for a New Generation of Solar Models
The Future of Solar Modelling: Requirements for a New Generation of Solar Models Open
View article: Late gas released in the young Kuiper belt could have significantly contributed to the carbon enrichment of the atmospheres of Neptune and Uranus
Late gas released in the young Kuiper belt could have significantly contributed to the carbon enrichment of the atmospheres of Neptune and Uranus Open
Context. Exo-Kuiper belts have been observed for decades, but the recent detection of gas in some of them may change our view of the Solar System’s youth. Late gas produced by the sublimation of CO (or CO 2 ) ices after the dissipation of …
View article: Cryoscope: A Cryogenic Infrared Survey Telescope in Antarctica
Cryoscope: A Cryogenic Infrared Survey Telescope in Antarctica Open
We present Cryoscope, a new 50 deg 2 field-of-view, 1.2 m aperture, K dark survey telescope to be located at Dome C, Antarctica. Cryoscope has an innovative optical–thermal design wherein the entire telescope is cryogenically cooled. Cryos…
View article: ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-Minute TESS Data
ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-Minute TESS Data Open
Summary This data repository is associated with the work presented in paper "ExoMiner++: Enhanced Transit Classification and a New Vetting Catalog for 2-Minute TESS Data" . Contents exominerplusplus_catalog_unk_tces_s1-s67_tess-spoc-2min_c…
View article: TOI-2005b: An Eccentric Warm Jupiter in Spin-orbit Alignment
TOI-2005b: An Eccentric Warm Jupiter in Spin-orbit Alignment Open
We report the discovery and characterization of TOI-2005 b, a warm Jupiter on an eccentric ( e ∼ 0.59), 17.3 days orbit around a V mag = 9.867 rapidly rotating F-star. The object was detected as a candidate by Transiting Exoplanet Survey S…
View article: Evidence of pure ammonia clouds in Jupiter’s Northern Temperate domain from Juno/JIRAM infrared spectral data
Evidence of pure ammonia clouds in Jupiter’s Northern Temperate domain from Juno/JIRAM infrared spectral data Open
In this work, we analyse data from the Jovian Infrared Auroral Mapper (JIRAM) imaging spectrometer on board the NASA mission Juno, to investigate the presence of spectrally identifiable ammonia clouds (SIACs). Focusing on the data from the…
View article: Planets Around Solar Twins/Analogs (PASTA). I. High-precision Stellar Chemical Abundances for 17 Planet-hosting Stars and the Condensation Temperature Trend*
Planets Around Solar Twins/Analogs (PASTA). I. High-precision Stellar Chemical Abundances for 17 Planet-hosting Stars and the Condensation Temperature Trend* Open
The Sun is depleted in refractory elements compared to nearby solar twins, which may be linked to the formation of giant or terrestrial planets. Here we present high-resolution, high signal-to-noise spectroscopic data for 17 solar-like sta…
View article: Cryoscope: A Cryogenic Infrared Survey Telescope in Antarctica
Cryoscope: A Cryogenic Infrared Survey Telescope in Antarctica Open
We present Cryoscope--a new 50 deg$^2$ field-of-view, 1.2 m aperture, $K_{dark}$ survey telescope to be located at Dome C, Antarctica. Cryoscope has an innovative optical-thermal design wherein the entire telescope is cryogenically cooled.…
View article: Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994*
Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994* Open
We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite. TOI-4994b transits a G-type star ( V = 12.6 mag) with a mass, radius, and…
View article: Conditions for radiative zones in the molecular hydrogen envelope of Jupiter and Saturn: The role of alkali metals
Conditions for radiative zones in the molecular hydrogen envelope of Jupiter and Saturn: The role of alkali metals Open
Interior models of gas giants in the Solar System traditionally assume a fully convective molecular hydrogen envelope. However, recent observations from the Juno mission suggest a possible depletion of alkali metals in Jupiter's molecular …
View article: Conditions for radiative zones in the molecular hydrogen envelope of Jupiter and Saturn: The role of alkali metals
Conditions for radiative zones in the molecular hydrogen envelope of Jupiter and Saturn: The role of alkali metals Open
Context . Interior models of gas giants in the Solar System traditionally assume a fully convective molecular hydrogen envelope. However, recent observations from the Juno mission suggest a possible depletion of alkali metals in Jupiter’s …
View article: Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994
Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994 Open
We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite (TESS). TOI-4994b transits a G-type star (V = 12.6 mag) with a mass, radiu…
View article: Characterizing Jupiter's interior using machine learning reveals four key structures
Characterizing Jupiter's interior using machine learning reveals four key structures Open
The internal structure of Jupiter is constrained by the precise gravity field measurements by NASA's Juno mission, atmospheric data from the Galileo entry probe, and Voyager radio occultations. Not only are these observations few compared …
View article: Stable Stratification of the Helium Rain Layer Yields Vastly Different Interiors and Magnetic Fields for Jupiter and Saturn
Stable Stratification of the Helium Rain Layer Yields Vastly Different Interiors and Magnetic Fields for Jupiter and Saturn Open
At sufficiently high pressures (∼Mbar) and low temperatures (∼10 3 –10 4 K), hydrogen and helium become partly immiscible. Interpretations of Jupiter’s and Saturn’s magnetic fields favor the existence of a statically stable layer near the …
View article: Characterizing Jupiter’s interior using machine learning reveals four key structures
Characterizing Jupiter’s interior using machine learning reveals four key structures Open
Context . The internal structure of Jupiter is constrained by the precise gravity field measurements by NASA’s Juno mission, atmospheric data from the Galileo entry probe, and Voyager radio occultations. Not only are these observations few…
View article: Planets Around Solar Twins/Analogs (PASTA) I.: High precision stellar chemical abundance for 17 planet-hosting stars and the condensation temperature trend
Planets Around Solar Twins/Analogs (PASTA) I.: High precision stellar chemical abundance for 17 planet-hosting stars and the condensation temperature trend Open
The Sun is depleted in refractory elements compared to nearby solar twins, which may be linked to the formation of giant or terrestrial planets. Here we present high-resolution, high signal-to-noise spectroscopic data for 17 solar-like sta…