Achrène Dyrek
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View article: On the synergetic use of Ariel and JWST for exoplanet atmospheric science
On the synergetic use of Ariel and JWST for exoplanet atmospheric science Open
This white paper explores the potential for strategic synergies between the JWST and the Ariel telescopes, two flagship observatories poised to revolutionise the study of exoplanet atmospheres. Both telescopes have the potential to address…
View article: Non-transiting exoplanets as a means of understanding star–planet interactions in close-in systems
Non-transiting exoplanets as a means of understanding star–planet interactions in close-in systems Open
Previous studies showed evidence of a dearth of close-in exoplanets around fast rotators, which can be explained by the combined action of intense tidal and magnetic interactions between planets and their host star. Detecting more exoplane…
View article: Cloud and haze parameterization in atmospheric retrievals: Insights from Titan's Cassini data and JWST observations of hot Jupiters
Cloud and haze parameterization in atmospheric retrievals: Insights from Titan's Cassini data and JWST observations of hot Jupiters Open
Context. Before JWST, telescope observations were not sensitive enough to constrain the nature of clouds in exo-atmospheres. Recent observations, however, have inferred cloud signatures as well as haze-enhanced scattering slopes motivating…
View article: Combined analysis of the 12.8 and 15 µm JWST/MIRI eclipse observations of TRAPPIST-1 b
Combined analysis of the 12.8 and 15 µm JWST/MIRI eclipse observations of TRAPPIST-1 b Open
International audience
View article: Is the Atmosphere of the Ultra-hot Jupiter WASP-121 b Variable?
Is the Atmosphere of the Ultra-hot Jupiter WASP-121 b Variable? Open
We present a comprehensive analysis of the Hubble Space Telescope observations of the atmosphere of WASP-121 b, an ultra-hot Jupiter. After reducing the transit, eclipse, and phase-curve observations with a uniform methodology and addressi…
View article: Transiting exoplanets with the Mid-InfraRed Instrument on board JWST: From simulations to observations
Transiting exoplanets with the Mid-InfraRed Instrument on board JWST: From simulations to observations Open
Context . The James Webb Space Telescope (JWST) has now started its exploration of exoplanetary worlds. In particular, the Mid-InfraRed Instrument (MIRI) with its Low-Resolution Spectrometer (LRS) carries out transit, eclipse, and phase-cu…
View article: Nightside clouds and disequilibrium chemistry on the hot Jupiter WASP-43b
Nightside clouds and disequilibrium chemistry on the hot Jupiter WASP-43b Open
Hot Jupiters are among the best-studied exoplanets, but it is still poorly understood how their chemical composition and cloud properties vary with longitude. Theoretical models predict that clouds may condense on the nightside and that mo…
View article: Is the atmosphere of the ultra-hot Jupiter WASP-121b variable?
Is the atmosphere of the ultra-hot Jupiter WASP-121b variable? Open
We present a comprehensive analysis of the Hubble Space Telescope observations of the atmosphere of WASP-121 b, a ultra-hot Jupiter. After reducing the transit, eclipse, and phase-curve observations with a uniform methodology and addressin…
View article: Combined analysis of the 12.8 and 15 microns JWST/MIRI eclipse observations of TRAPPIST-1 b
Combined analysis of the 12.8 and 15 microns JWST/MIRI eclipse observations of TRAPPIST-1 b Open
The first JWST/MIRI photometric observations of TRAPPIST-1 b allowed for the detection of the thermal emission of the planet at 15 μm, suggesting that the planet could be a bare rock with a zero albedo and no redistribution of heat. Here w…
View article: In search of gravity mode signatures in main sequence solar-type stars observed by <i>Kepler</i>
In search of gravity mode signatures in main sequence solar-type stars observed by <i>Kepler</i> Open
Gravity modes ( g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes ( gi modes) possess unmatched properties as probes for stars with radiative interiors. The structural and dynamical constraints that they are …
View article: In search of gravity mode signatures in main sequence solar-type stars observed by Kepler
In search of gravity mode signatures in main sequence solar-type stars observed by Kepler Open
Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as probes for stars with radiative interiors. The structural and dynamical constraints that they are ab…
View article: <i>Spitzer</i> thermal phase curve of WASP-121 b
<i>Spitzer</i> thermal phase curve of WASP-121 b Open
Aims. We analyse unpublished Spitzer observations of the thermal phase-curve of WASP-121 b, a benchmark ultra-hot Jupiter. Methods. We adopted the wavelet pixel-independent component analysis technique to remove challenging instrumental sy…
View article: SO2, silicate clouds, but no CH4 detected in a warm Neptune with JWST MIRI
SO2, silicate clouds, but no CH4 detected in a warm Neptune with JWST MIRI Open
The chemical composition of planetary atmospheres bears the imprint of their formation and evolution 1,2 . Recently, the significance of photochemistry was highlighted through the assignment of sulphur dioxide (SO 2 ) as carrier of a featu…
View article: Thermal emission from the Earth-sized exoplanet TRAPPIST-1 b using JWST
Thermal emission from the Earth-sized exoplanet TRAPPIST-1 b using JWST Open
The TRAPPIST-1 system is remarkable for its seven planets that are similar in size, mass, density, and stellar heating to the rocky planets Venus, Earth, and Mars in our own Solar System (Gillon et al. 2017). All TRAPPIST-1 planets have be…
View article: A First Look at the JWST MIRI/LRS Phase Curve of WASP-43b
A First Look at the JWST MIRI/LRS Phase Curve of WASP-43b Open
We observed a full-orbit phase curve of the hot Jupiter WASP-43b with MIRI/LRS as part of the Transiting Exoplanet Community Early Release Science Program. Here we report preliminary findings for the instrument performance from the team's …