Email
William.Dethier@astro.up.pt

Biographic Notes
William is a post-doctoral researcher in CAUP since early February 2024 working in the planet group. He studied for a bachelor’s degree in Physics and for a master’s degree in space sciences at the University of Liège in Belgium. After that, he studied for a Ph.D. in Astrophysics and diluted media at the University of Grenoble Alpes, France, in collaboration with the Observatory of Geneva, Switzerland.

In CAUP he is working on the characterisation and better understanding of the impact of stellar contamination in high-resolution transit observations. Through planetary transit simulations, his works aims to help better characterise exoplanet atmospheres.

Lastest publications at IA (or with IA Researchers)X. Luo, V. Bourrier, E. Friden, M. Lafarga, A. Castro-González, M. R. Zapatero Osorio, A. C. Petit, A. C. M. Correia, E. M. Bryant, E. Delgado Mena et al. (including: S. G. Sousa, V. Zh. Adibekyan, W. Dethier), 2026,
ATREIDES: II. Detection of a polar orbit for HAT-P-26 b, a fluffy planet in the Neptunian ridge,
Astronomy & Astrophysics, 711, 26
>> AbstractJ. Peralta Lucero, O. Demangeon, E. A. S. Cristo, W. Dethier, N. C. Santos, 2026,
Impact of stellar spots on the high-resolution transmission spectra of a giant planet around a Sun-like star,
Astronomy & Astrophysics, 709, 16
>> AbstractM. Steiner, V. Bourrier, D. Ehrenreich, W. Dethier, H. Chakraborty, S. Pelletier, M. Lendl, B. Akinsanmi, R. Allart, J. -M. Almenara et al. (including: C. J. A. P. Martins, N. C. Santos), 2026,
Precise measurement of WASP-31 b's Rossiter-McLaughlin effect and characterization of the planet transmission spectra,
Astronomy & Astrophysics, 708, 18
>> AbstractE. Gonçalves, E. A. S. Cristo, W. Dethier, N. C. Santos, S. G. Sousa, P. T. P. Viana, T. de Azevedo Silva, R. Allart, V. Bourrier, 2026,
Exploring the surface of HD 189733 via Doppler shadow analysis of planetary transits,
Astronomy & Astrophysics, 709, 16
>> AbstractE. A. S. Cristo, J. P. Faria, N. C. Santos, W. Dethier, B. Akinsanmi, A. Barka, O. D. S. Demangeon, J. Peralta Lucero, A. M. Silva, 2025,
SOAPv4: A new step toward modeling stellar signatures in exoplanet research,
Astronomy & Astrophysics, 702, 17
>> AbstractV. Bourrier, M. Steiner, A. Castro-González, D. J. Armstrong, M. Attia, S. Gill, M. Timmermans, J. Fernandez, F. Hawthorn, A. H. M. J. Triaud et al. (including: S. G. Sousa, V. Zh. Adibekyan, E. Delgado Mena, W. Dethier, N. C. Santos, S. C. C. Barros, K. Al Moulla), 2025,
ATREIDES: I. Embarking on a trek across the exo-Neptunian landscape with the TOI-421 system,
Astronomy & Astrophysics, 701, 30
>> Abstract