Exoplanet atmospheres

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The climates and thermal emission spectra of prime nearby temperate rocky exoplanet targets

(2025)

Authors:

Tobi Hammond, Thaddeus D Komacek, Ravi K Kopparapu, Thomas J Fauchez, Avi M Mandell, Eric T Wolf, Vincent Kofman, Stephen R Kane, Ted M Johnson, Anmol Desai, Giada Arney, Jaime S Crouse
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Thermal Phase Curves in Hot Gas Giant Exoplanets Exhibit a Complex Dependence on Planetary Properties

The Astrophysical Journal American Astronomical Society 982:2 (2025) 159

Authors:

Mark R Swain, Kyle A Pearson, Thaddeus D Komacek, Geoffrey Bryden, Emeline Fromont, Gautam Vasisht, Gael Roudier, Robert T Zellem
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Characterization of AF Lep b at high spectral resolution with VLT/HiRISE

Astronomy & Astrophysics EDP Sciences 696 (2025) a6

Authors:

A Denis, A Vigan, J Costes, G Chauvin, A Radcliffe, M Ravet, W Balmer, P Palma-Bifani, S Petrus, V Parmentier, S Martos, A Simonnin, M Bonnefoy, R Cadet, T Forveille, B Charnay, F Kiefer, A-M Lagrange, A Chiavassa, T Stolker, A Lavail, N Godoy, M Janson, R Pourcelot, P Delorme, E Rickman, D Cont, A Reiners, R De Rosa, H Anwand-Heerwart, Y Charles, A Costille, M El Morsy, J Garcia, M Houllé, M Lopez, G Murray, E Muslimov, GPPL Otten, J Paufique, M Phillips, U Seemann, A Viret, G Zins
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Transmission spectroscopy of WASP-52 b with JWST NIRISS: Water and helium atmospheric absorption, alongside prominent star-spot crossings

Monthly Notices of the Royal Astronomical Society (2025) staf489

Authors:

Marylou Fournier-Tondreau, Yanbo Pan, Kim Morel, David Lafrenière, Ryan J MacDonald, Louis-Philippe Coulombe, Romain Allart, Loïc Albert, Michael Radica, Caroline Piaulet-Ghorayeb, Pierre-Alexis Roy, Stefan Pelletier, Lisa Dang, René Doyon, Björn Benneke, Nicolas B Cowan, Antoine Darveau-Bernier, Olivia Lim, Étienne Artigau, Doug Johnstone, Lisa Kaltenegger, Jake Taylor, Laura Flagg
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Clouds and Hazes in GJ 1214 b’s Metal-rich Atmosphere

Astronomical Journal American Astronomical Society 169:4 (2025) 221

Authors:

Isaac Malsky, Emily Rauscher, Kevin Stevenson, Arjun B Savel, Maria E Steinrueck, Peter Gao, Eliza M-R Kempton, Michael T Roman, Jacob L Bean, Michael Zhang, Vivien Parmentier, Anjali AA Piette, Tiffany Kataria

Abstract:

The sub-Neptune GJ 1214 b has an infamously flat transmission spectrum, likely due to thick aerosols in its atmosphere. A recent JWST/MIRI spectroscopic phase curve of GJ 1214 b added to this picture, suggesting a highly reflective and metal-rich atmosphere. Using a 3D general circulation model with both photochemical hazes and condensate clouds, we characterize how different aerosol types affect the atmospheric structure of GJ 1214 b and manifest in its spectroscopic phase curve. Additionally, we reanalyze the original GJ 1214 b JWST phase curve. The reanalysis shows a hotter nightside, similar dayside temperature, and a lower, but still elevated, Bond albedo (0.42 ± 0.11) in comparison to the original results. We find that a scenario with both clouds and hazes is most consistent with the JWST phase curve. Reflective clouds or hazes are needed to explain the large Bond albedo, and hazes or a supersolar metallicity help account for the several hundred kelvin day–night temperature difference measured by the phase curve.
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