Publications

2025

1. A&A

   Non-transiting exoplanets as a means of understanding star-planet interactions in close-in systems

   C. Gourvès, S. N. Breton, A. Dyrek, and 5 more authors

   Astronomy & Astrophysics, Jul 2025

   arXiv:2505.10135 [astro-ph]
2. A&A

   Cloud and haze parameterization in atmospheric retrievals: Insights from Titan’s Cassini data and JWST observations of hot Jupiters

   Q. Changeat, D. Bardet, K. Chubb, and 4 more authors

   Jul 2025
3. arXiv

   On the synergetic use of Ariel and JWST for exoplanet atmospheric science

   Quentin Changeat, Pierre-Olivier Lagage, Giovanna Tinetti, and 20 more authors

   Sep 2025

   arXiv:2509.02657 [astro-ph]
4. NatureAstro

   Combined analysis of the 12.8 and 15 μm JWST/MIRI eclipse observations of TRAPPIST-1 b

   Elsa Ducrot, Pierre-Olivier Lagage, Michiel Min, and 36 more authors

   Nature Astronomy, Mar 2025
5. arXiv

   JWST Data Analysis Report for GJ3929b

   Tyler Baines, Achrène Dyrek, and Taylor J Bell

   Mar 2025

2024

1. Nature

   Sulphur dioxide in the mid-infrared transmission spectrum of WASP-39b

   Diana Powell, Adina D. Feinstein, Elspeth K. H. Lee, and 70 more authors

   Nature, Jan 2024

   LINK
2. NatureAstro

   Nightside clouds and disequilibrium chemistry on the hot Jupiter WASP-43b

   Taylor J. Bell, Nicolas Crouzet, Patricio E. Cubillos, and 80 more authors

   Nature Astronomy, Apr 2024

   LINK
3. APJ

   Is the Atmosphere of the Ultra-hot Jupiter WASP-121 b Variable?

   Q. Changeat, J. W. Skinner, J. Y-K. Cho, and 12 more authors

   The Astrophysical Journal Supplement Series, Feb 2024

   LINK
4. Nature

   SO2, silicate clouds, but no CH4 detected in a warm Neptune

   Achrène Dyrek, Michiel Min, Leen Decin, and 43 more authors

   Nature, Jan 2024

   LINK
5. A&A

   Transiting exoplanets with the Mid-InfraRed Instrument on board JWST: From simulations to observations

   A. Dyrek, E. Ducrot, P.-O. Lagage, and 4 more authors

   Astronomy & Astrophysics, Mar 2024

   LINK
6. Nature

   A high internal heat flux and large core in a warm neptune exoplanet

   Luis Welbanks, Taylor J. Bell, Thomas G. Beatty, and 16 more authors

   Nature, May 2024

   LINK

2023

1. Nature

   Thermal emission from the Earth-sized exoplanet TRAPPIST-1 b using JWST

   Thomas P. Greene, Taylor J. Bell, Elsa Ducrot, and 3 more authors

   Nature, Jun 2023

   LINK
2. A&A

   Spitzer thermal phase curve of WASP-121 b

   G. Morello, Q. Changeat, A. Dyrek, and 2 more authors

   Astronomy & Astrophysics, Aug 2023

   LINK
3. arXiv

   A First Look at the JWST MIRI/LRS Phase Curve of WASP-43b

   Taylor J. Bell, Laura Kreidberg, Sarah Kendrew, and 7 more authors

   Aug 2023

   Version Number: 1

   LINK
4. Nature

   A reflective, metal-rich atmosphere for GJ 1214b from its JWST phase curve

   Eliza M.-R. Kempton, Michael Zhang, Jacob L. Bean, and 30 more authors

   Nature, Aug 2023

   LINK
5. A&A

   In search of gravity mode signatures in main sequence solar-type stars observed by \textitKepler

   S. N. Breton, H. Dhouib, R. A. García, and 7 more authors

   Astronomy & Astrophysics, Nov 2023

   LINK

2022

1. MNRAS

   Is binning always sinning? The impact of time-averaging for exoplanet phase curves

   Giuseppe Morello, Achrène Dyrek, and Quentin Changeat

   Monthly Notices of the Royal Astronomical Society, Oct 2022

   ABSTRACT LINK

   We explore how finite integration time or temporal binning can affect the analysis of exoplanet phase curves. We provide analytical formulae to account for this effect or, if neglected, to estimate the potential biases in the retrieved parameters. As expected, due to their smoother variations over longer time-scales, phase curves can be binned more heavily than transits without causing severe biases. In the simplest case of a sinusoidal phase curve with period P, the integration time Δt reduces its amplitude by the scaling factor sinc(πΔt/P), without altering its phase or shape. We also provide formulae to predict reasonable parameter error bars from phase-curve observations. Our findings are tested with both synthetic and real data sets, including unmodelled astrophysical signals and/or instrumental systematic effects. Tests with the Spitzer data show that binning can affect the best-fitting parameters beyond predictions, due to the correction of high-frequency correlated noise. Finally, we summarize key guidelines for speeding up the analysis of exoplanet phase curves without introducing significant biases in the retrieved parameters.

2. SPIE

   Characterization of the MIRIm double prism assembly at short wavelengths: implications for transit observations of exoplanets

   Patrice Bouchet, René Gastaud, Pierre-Olivier Lagage, and 12 more authors

   In Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave , Aug 2022

   LINK

2020

1. SPIE

   A cryogenic actuator for the image derotator on ELT-METIS

   Olivier Corpace, Jean-Christophe Barrière, Ayoub Bounad, and 12 more authors

   In Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV , Dec 2020

   LINK