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Sub-Neptune planets, with no analogue in our solar system, provide a wealth of information about exoplanet diversity, formation & evolution, and habitability. Their robust characterisation requires the coupling of physically informed…

Earth and Planetary Astrophysics · Physics 2025-11-24 Frances E. Rigby , Nikku Madhusudhan

The prospects for finding transiting exoplanets in the range of a few to 20 Earth masses is growing rapidly with both ground-based and spaced-based efforts. We describe a publicly available computer code to compute and quantify the…

Astrophysics · Physics 2013-01-08 Li Zeng , Sara Seager

GJ1214b stands out among the detected low-mass exoplanets, because it is, so far, the only one amenable to transmission spectroscopy. Up to date there is no consensus about the composition of its envelope although most studies suggest a…

Earth and Planetary Astrophysics · Physics 2015-06-15 Diana Valencia , Tristan Guillot , Vivien Parmentier , Richard S. Freedman

Sub-Neptunes (Rp~1.25-4 REarth) remain the most commonly detected exoplanets to date. However, it remains difficult for observations to tell whether these intermediate-sized exoplanets have surfaces and where their surfaces are located.…

Earth and Planetary Astrophysics · Physics 2021-06-23 Xinting Yu , Julianne I. Moses , Jonathan J. Fortney , Xi Zhang

The ever-expanding catalog of detected super-Earths calls for theoretical studies of their properties in the case of a substantial water layer. This work considers such water planets with a range of masses and water mass fractions (2 to 5…

Earth and Planetary Astrophysics · Physics 2015-05-18 Roger Fu , Richard J. OConnell , Dimitar D. Sasselov

Studying and understanding the physical and chemical processes that govern hot Jupiters gives us insights on the formation of these giant planets. Having a constraint on the molecular composition of their atmosphere can help us pinpoint…

Earth and Planetary Astrophysics · Physics 2024-04-10 Luc Bazinet , Stefan Pelletier , Björn Benneke , Ricardo Salinas , Gregory N. Mace

Sub-Neptune-sized exoplanets represent one of the most common types of planets in the Milky Way, yet many of their properties are unknown. Here, we present a prescription to adapt the capabilities of the stellar evolution toolkit Modules…

Earth and Planetary Astrophysics · Physics 2016-11-15 Howard Chen , Leslie A. Rogers

A major goal in the discovery and characterisation of exoplanets is to identify terrestrial-type worlds that are similar to (or otherwise distinct from) our Earth. Recent results have highlighted the importance of applying devolatilisation…

Earth and Planetary Astrophysics · Physics 2022-05-04 Haiyang S. Wang , Sascha P. Quanz , David Yong , Fan Liu , Fabian Seidler , Lorena Acuña , Stephen J. Mojzsis

JWST is revolutionizing the field of exoplanet atmospheres by delivering unprecedented spectroscopic constraints on their chemical compositions. It has provided tight constraints on the abundances of dominant carbon- and oxygen-bearing…

Earth and Planetary Astrophysics · Physics 2026-04-03 Xinting Yu , Christopher R. Glein , Daniel P. Thorngren , David F. Murray

The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of planetary cores. Exoplanets that have undergone rare…

Earth and Planetary Astrophysics · Physics 2020-07-17 David J. Armstrong , Théo A. Lopez , Vardan Adibekyan , Richard A. Booth , Edward M. Bryant , Karen A. Collins , Alexandre Emsenhuber , Chelsea X. Huang , George W. King , Jorge Lillo-box , Jack J. Lissauer , Elisabeth C. Matthews , Olivier Mousis , Louise D. Nielsen , Hugh Osborn , Jon Otegi , Nuno C. Santos , Sérgio G. Sousa , Keivan G. Stassun , Dimitri Veras , Carl Ziegler , Jack S. Acton , Jose M. Almenara , David R. Anderson , David Barrado , Susana C. C. Barros , Daniel Bayliss , Claudia Belardi , Francois Bouchy , César Briceno , Matteo Brogi , David J. A. Brown , Matthew R. Burleigh , Sarah L. Casewell , Alexander Chaushev , David R. Ciardi , Kevin I. Collins , Knicole D. Colón , Benjamin F. Cooke , Ian J. M. Crossfield , Rodrigo F. Díaz , Magali Deleuil , Elisa Delgado Mena , Olivier D. S. Demangeon , Caroline Dorn , Xavier Dumusque , Philipp Eigmuller , Michael Fausnaugh , Pedro Figueira , Tianjun Gan , Siddharth Gandhi , Samuel Gill , Michael R. Goad , Maximilian N. Guenther , Ravit Helled , Saeed Hojjatpanah , Steve B. Howell , James Jackman , James S. Jenkins , Jon M. Jenkins , Eric L. N. Jensen , Grant M. Kennedy , David W. Latham , Nicholas Law , Monika Lendl , Michael Lozovsky , Andrew W. Mann , Maximiliano Moyano , James McCormac , Farzana Meru , Christoph Mordasini , Ares Osborn , Don Pollacco , Didier Queloz , Liam Raynard , George R. Ricker , Pamela Rowden , Alexandre Santerne , Joshua E. Schlieder , S. Seager , Lizhou Sha , Thiam-Guan Tan , Rosanna H. Tilbrook , Eric Ting , Stéphane Udry , Roland Vanderspek , Christopher A. Watson , Richard G. West , Paul A. Wilson , Joshua N. Winn , Peter Wheatley , Jesus Noel Villasenor , Jose I. Vines , Zhuchang Zhan

Recent surveys have revealed that planets intermediate in size between Earth and Neptune ("super-Earths") are among the most common planets in the Galaxy. Atmospheric studies are the next step toward developing a comprehensive understanding…

The interior composition and structure of Uranus are ambiguous. It is unclear whether Uranus is composed of fully differentiated layers dominated by an icy mantle or has smooth compositional gradients. The Uranus Orbiter and Probe (UOP),…

Earth and Planetary Astrophysics · Physics 2024-12-10 Zifan Lin , Sara Seager , Benjamin P. Weiss

In principle, the combined measurements of the mass and radius a giant exoplanet allow one to determine the relative fraction of hydrogen and helium and of heavy elements in the planet. However, uncertainties on the underlying physics imply…

Astrophysics · Physics 2008-11-26 Tristan Guillot

The bulk compositions of small planets ($R_p< 2 \mathrm{R}_\oplus$) are directly linked to their formation histories, making reliable compositional constraints imperative for testing models of planet formation and evolution. Because…

Earth and Planetary Astrophysics · Physics 2026-01-21 Joseph Schulze , Natalie Hinkel , Wendy Panero , Cayman Unterborn

We explore the chemistry and observability of nitrogen dominated atmospheres for ultra-short-period super-Earths. We base the assumption, that super-Earths could have nitrogen filled atmospheres, on observations of 55 Cnc e that favour a…

Earth and Planetary Astrophysics · Physics 2020-03-25 Mantas Zilinskas , Yamila Miguel , Paul Mollière , Shang-Min Tsai

Aims: The secondary atmospheres of terrestrial planets form and evolve as a consequence of interaction with the interior over geological time. We aim to quantify the influence of planetary bulk composition on the interior--atmosphere…

Earth and Planetary Astrophysics · Physics 2020-11-04 Rob J. Spaargaren , Maxim D. Ballmer , Dan J. Bower , Caroline Dorn , Paul J. Tackley

High-energy irradiation of exoplanets has been identified to be a key influence on the stability of these planets' atmospheres. So far, irradiation-driven mass-loss has been observed only in two Hot Jupiters, and the observational data…

Solar and Stellar Astrophysics · Physics 2015-06-04 K. Poppenhaeger , S. Czesla , S. Schröter , S. Lalitha , V. Kashyap , J. H. M. M. Schmitt

Transit surveys combined with Doppler data have revealed a class of gas giant planets that are massive and highly enriched in heavy elements (e.g., HD149026b, GJ436b, and HAT-P-20b). It is tempting to consider these planets as validation of…

Earth and Planetary Astrophysics · Physics 2015-05-27 Aaron C. Boley , Ravit Helled , Matthew J. Payne

As the characterization of exoplanet atmospheres proceeds, providing insights into atmospheric chemistry and composition, a key question is how much deeper into the planet we might be able to see from its atmospheric properties alone. For…

Earth and Planetary Astrophysics · Physics 2023-12-19 Xander Byrne , Oliver Shorttle , Sean Jordan , Paul B. Rimmer

Atmospheric characterization through spectroscopic analysis, an essential tool of modern exoplanet science, can benefit significantly from the context provided by interior structure models. In particular, the planet's bulk metallicity $Z_p$…

Earth and Planetary Astrophysics · Physics 2019-04-17 Daniel P. Thorngren , Jonathan J. Fortney
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