Ground-breaking exoplanet science with the ANDES spectrograph at the ELT

Experimental Astronomy Springer Nature 59:3 (2025) 29

Authors:

Enric Palle, Katia Biazzo, Emeline Bolmont, Paul Mollière, Katja Poppenhaeger, Jayne Birkby, Matteo Brogi, Gael Chauvin, Andrea Chiavassa, Jens Hoeijmakers, Emmanuel Lellouch, Christophe Lovis, Roberto Maiolino, Lisa Nortmann, Hannu Parviainen, Lorenzo Pino, Martin Turbet, Jesse Weder, Simon Albrecht, Simone Antoniucci, Susana C Barros, Andre Beaudoin, Bjorn Benneke, Isabelle Boisse, Aldo S Bonomo, Francesco Borsa, Alexis Brandeker, Wolfgang Brandner, Lars A Buchhave, Anne-Laure Cheffot, Robin Deborde, Florian Debras, Rene Doyon, Paolo Di Marcantonio, Paolo Giacobbe, Jonay I González Hernández, Ravit Helled, Laura Kreidberg, Pedro Machado, Jesus Maldonado, Alessandro Marconi, BL Canto Martins, Adriano Miceli, Christoph Mordasini, Mamadou N’Diaye, Andrzej Niedzielski, Brunella Nisini, Livia Origlia, Celine Peroux, Alexander GM Pietrow, Enrico Pinna, Emily Rauscher, Sabine Reffert, Cristina Rodríguez-López, Philippe Rousselot, Nicoletta Sanna, Nuno C Santos, Adrien Simonnin, Alejandro Suárez Mascareño, Alessio Zanutta, Maria Rosa Zapatero-Osorio, Mathias Zechmeister

The bolometric Bond albedo and energy balance of Uranus

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2025)

Authors:

Patrick GJ Irwin, Daniel D Wenkert, Amy A Simon, Emma Dahl, Heidi B Hammel

Abstract:

<jats:title>Abstract</jats:title> <jats:p>Using a newly developed ‘holistic’ atmospheric model of the aerosol structure in Uranus’s atmosphere, based upon observations made by HST/STIS, Gemini/NIFS and IRTF/SpeX from 2000 – 2009, we make a new estimate the bolometric Bond albedo of Uranus during this time of A* = 0.338 ± 0.011, with a phase integral of q* = 1.36 ± 0.03. Then, using a simple seasonal model, developed to be consistent with the disc-integrated blue and green magnitude data from the Lowell Observatory from 1950 – 2016, we model how Uranus’s reflectivity and heat budget vary during its orbit and determine new orbital-mean average values for the bolometric Bond albedo of $\overline{A^*} = 0.349 \pm 0.016$ and for the absorbed solar flux of $\overline{P_\mathrm{in}}=0.604 \pm 0.027$ W m−2. Assuming the outgoing thermal flux to be $\overline{P_\mathrm{out}}=0.693 \pm 0.013$ W m−2, as previously determined from Voyager 2 observations, we arrive at a new estimate of Uranus’s average heat flux budget of Pout/Pin = 1.15 ± 0.06, finding considerable variation with time due to Uranus’s significant orbital eccentricity of 0.046. This leads the flux budget to vary from Pout/Pin = 1.03 near perihelion, to 1.24 near aphelion. We conclude that although Pout/Pin is considerably smaller than for the other giant planets, Uranus is not in thermal equilibrium with the Sun.</jats:p>

The atmosphere of Titan in late northern summer from JWST and Keck observations

Nature Astronomy (2025) 1-13

Authors:

Conor A Nixon, Bruno Bézard, Thomas Cornet, Brandon Park Coy, Imke de Pater, Maël Es-Sayeh, Heidi B Hammel, Emmanuel Lellouch, Nicholas A Lombardo, Manuel López-Puertas, Juan M Lora, Pascal Rannou, Sébastien Rodriguez, Nicholas A Teanby, Elizabeth P Turtle, Richard K Achterberg, Carlos Alvarez, Ashley G Davies, Katherine de Kleer, Greg Doppmann, Leigh N Fletcher, Alexander G Hayes, Bryan J Holler, Patrick GJ Irwin, Carolyn Jordan, Oliver RT King, Nicholas W Kutsop, Theresa C Marlin, Henrik Melin, Stefanie N Milam, Edward M Molter, Luke Moore, Yaniss Nyffenegger-Péré, James O’Donoghue, John O’Meara, Scot CR Rafkin, Michael T Roman, Arina Rostopchina, Naomi Rowe-Gurney, Carl Schmidt, Judy Schmidt, Christophe Sotin, Tom S Stallard, John A Stansberry, Robert A West

The Climates and Thermal Emission Spectra of Prime Nearby Temperate Rocky Exoplanet Targets

The Astrophysical Journal American Astronomical Society 984:2 (2025) 181

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

Effects of transient stellar emissions on planetary climates of tidally-locked exo-earths

(2025)

Authors:

Howard Chen, Paolo De Luca, Assaf Hochman, Thaddeus D Komacek