Harnessing machine learning for accurate treatment of overlapping opacity species in general circulation models

1 code implementation • 1 Nov 2023 • Aaron David Schneider, Paul Mollière, Gilles Louppe, Ludmila Carone, Uffe Gråe Jørgensen, Leen Decin, Christiane Helling

For this study, we specifically examined the coupling between chemistry and radiation in GCMs and compared different methods for the mixing of opacities of different chemical species in the correlated-k assumption, when equilibrium chemistry cannot be assumed.

Indications for very high metallicity and absence of methane for the eccentric exo-Saturn WASP-117b

no code implementations • 9 Jun 2020 • Ludmila Carone, Paul Mollière, Yifan Zhou, Jeroen Bouwman, Fei Yan, Robin Baeyens, Dániel Apai, Nestor Espinoza, Benjamin V. Rackham, Andrés Jordán, Daniel Angerhausen, Leen Decin, Monika Lendl, Olivia Venot, Thomas Henning

Using a 1D atmosphere model with isothermal temperature, uniform cloud deck and equilibrium chemistry, the Bayesian evidence of a retrieval analysis of the transmission spectrum indicates a preference for a high atmospheric metallicity ${\rm [Fe/H]}=2. 58^{+0. 26}_{-0. 37}$ and clear skies.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

Magritte, a modern software library for 3D radiative transfer: I. Non-LTE atomic and molecular line modelling

1 code implementation • 18 Dec 2019 • Frederik De Ceuster, Ward Homan, Jeremy Yates, Leen Decin, Peter Boyle, James Hetherington

We present Magritte: a modern open-source software library for 3D radiative transfer.

Instrumentation and Methods for Astrophysics