Planetary Climate Dynamics

Research group

Research theme

Sub department

About

Equatorial Waves and Superrotation in the Stratosphere of a Titan General Circulation Model

(2023)

Authors:

Neil T Lewis, Nicholas A Lombardo, Peter L Read, Juan M Lora

Awesome SOSS: transmission spectroscopy of WASP-96b with NIRISS/SOSS

Monthly Notices of the Royal Astronomical Society 91̽»¨ University Press (OUP) 524:1 (2023) 835-856

Authors:

Michael Radica, Luis Welbanks, Néstor Espinoza, Jake Taylor, Louis-Philippe Coulombe, Adina D Feinstein, Jayesh Goyal, Nicholas Scarsdale, Loïc Albert, Priyanka Baghel, Jacob L Bean, Jasmina Blecic, David Lafrenière, Ryan J MacDonald, Maria Zamyatina, Romain Allart1, Étienne Artigau, Natasha E Batalha, Neil James Cook, Nicolas B Cowan, Lisa Dang, René Doyon, Marylou Fournier-Tondreau, Doug Johnstone, Michael R Line, Sarah E Moran, Sagnick Mukherjee, Stefan Pelletier, Pierre-Alexis Roy, Geert Jan Talens, Joseph Filippazzo, Klaus Pontoppidan, Kevin Volk

Photochemical Hazes Dramatically Alter Temperature Structure and Atmospheric Circulation in 3D Simulations of Hot Jupiters

The Astrophysical Journal American Astronomical Society 951:2 (2023) 117

Authors:

Maria E Steinrueck, Tommi Koskinen, Panayotis Lavvas, Vivien Parmentier, Sebastian Zieba, Xianyu Tan, Xi Zhang, Laura Kreidberg

The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. III. Single Object Slitless Spectroscopy

Publications of the Astronomical Society of the Pacific IOP Publishing 135:1049 (2023) 075001

Authors:

Loïc Albert, David Lafrenière, René Doyon, Étienne Artigau, Kevin Volk, Paul Goudfrooij, André R Martel, Michael Radica, Jason Rowe, Néstor Espinoza, Arpita Roy, Joseph C Filippazzo, Antoine Darveau-Bernier, Geert Jan Talens, Anand Sivaramakrishnan, Chris J Willott, Alexander W Fullerton, Stephanie LaMassa, John B Hutchings, Neil Rowlands, M Begoña Vila, Julia Zhou, David Aldridge, Michael Maszkiewicz, Mathilde Beaulieu, Neil J Cook, Caroline Piaulet, Pierre-Alexis Roy, Pierrot Lamontagne, Kim Morel, William Frost, Salma Salhi, Louis-Philippe Coulombe, Björn Benneke, Ryan J MacDonald, Doug Johnstone, Jake D Turner, Marylou Fournier-Tondreau, Romain Allart, Lisa Kaltenegger

Temperature–chemistry coupling in the evolution of gas giant atmospheres driven by stellar flares

Monthly Notices of the Royal Astronomical Society 91̽»¨ University Press 523:4 (2023) 5681-5702

Authors:

Harrison Nicholls, Olivia Venot

Abstract:

The effect of enhanced UV irradiation associated with stellar flares on the atmospheric composition and temperature of gas giant exoplanets was investigated. This was done using a 1D radiative-convective-chemical model with self-consistent feedback between the temperature and the non-equilibrium chemistry. It was found that flare-driven changes to chemical composition and temperature give rise to prolonged trends in evolution across a broad range of pressure levels and species. Allowing feedback between chemistry and temperature plays an important role in establishing the quiescent structure of these atmospheres, and determines their evolution due to flares. It was found that cooler planets are more susceptible to flares than warmer ones, seeing larger changes in composition and temperature, and that temperature–chemistry feedback modifies their evolution. Long-term exposure to flares changes the transmission spectra of gas giant atmospheres; these changes differed when the temperature structure was allowed to evolve self-consistently with the chemistry. Changes in spectral features due to the effects of flares on these atmospheres can be associated with changes in composition. The effects of flares on the atmospheres of sufficiently cool planets will impact observations made with JWST. It is necessary to use self-consistent models of temperature and chemistry in order to accurately capture the effects of flares on features in the transmission spectra of cooler gas giants, but this depends heavily on the radiation environment of the planet.