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)E. 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
>> AbstractD. Mounzer, W. Dethier, C. Lovis, V. Bourrier, A. Psaridi, H. Chakraborty, M. Lendl, R. Allart, J. V. Seidel, M. R. Zapatero Osorio et al. (including: C. J. A. P. Martins, J. Rodrigues, N. C. Santos), 2025,
The ESPRESSO transmission spectrum of HD189733 b: Extracting the planetary sodium and lithium signatures amid stellar contamination,
Astronomy & Astrophysics, 700, 21
>> AbstractS. J. Mercier, X. Dumusque, V. Bourrier, K. Al Moulla, M. Cretignier, W. Dethier, G. Lo Curto, P. Figueira, C. Lovis, F. Pepe et al. (including: N. C. Santos), 2025,
Studying the variability of the He triplet to understand the detection limits of evaporating exoplanet atmospheres,
Astronomy & Astrophysics, 700, 15
>> AbstractN. C. Santos, A. Cabral, I. M. Leite, A. Smette, M. Abreu, D. Castro Alves, J. H. C. Martins, M. A. Monteiro, A. C. da Silva, B. Wehbe et al. (including: G. Avila, R. Clara, R. Gafeira, P. Moreno, A. Oliveira, K. Al Moulla, V. Zh. Adibekyan, A. Barka, S. C. C. Barros, P. M. H. Branco, E. A. S. Cristo, Y. C. Damasceno, O. Demangeon, W. Dethier, E. Gonçalves, J. Peralta Lucero, J. Rodrigues, C. San Nicolas Martinez, A. R. G. Santos, S. G. Sousa, P. T. P. Viana), 2025,
PoET: the Paranal solar ESPRESSO Telescope,
The Messenger, 194, 21 - 25
>> AbstractW. Dethier, B. Tessore, 2024,
Assessing the residual biases in high-resolution transit absorption spectra correction,
Astronomy & Astrophysics, 688, 6
>> Abstract