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We know that giant planets played a crucial role in the making of our Solar System. The discovery of giant planets orbiting other stars is a formidable opportunity to learn more about these objects, what is their composition, how various…

Astrophysics · Physics 2009-11-10 Tristan Guillot

Computed using the APPLE planetary evolution code, we present updated evolutionary models for Jupiter and Saturn that incorporate helium rain, non-adiabatic thermal structures, and "fuzzy" extended heavy-element cores. Building on our…

Earth and Planetary Astrophysics · Physics 2025-12-02 Ankan Sur , Adam Burrows , Roberto Tejada Arevalo , Yubo Su

Of the 97 known satellites in the Jovian system, the individual masses and densities of each moon have only been determined for six of them: the four Galileans, Amalthea, and Himalia. In this letter, we derive a prediction for the mean…

Earth and Planetary Astrophysics · Physics 2025-08-15 Ian R. Brunton , Konstantin Batygin

The formation of a cold Jupiter (CJ) is expected to quench the influx of pebbles and the migration of cores interior to its orbit, thus limiting the efficiency of rocky planet formation either by pebble accretion and/or orbital migration.…

Earth and Planetary Astrophysics · Physics 2023-09-18 Marcy Best , Antranik A. Sefilian , Cristobal Petrovich

Recent measurements of Jupiter's gravitational moments by the Juno spacecraft and seismology of Saturn's rings suggest that the primordial composition gradients in the deep interior of these planets have persisted since their formation. One…

Earth and Planetary Astrophysics · Physics 2023-11-08 J. R. Fuentes , Evan H. Anders , Andrew Cumming , Bradley W. Hindman

One of the outstanding goals of the planetary science community is to measure the present-day atmospheric composition of planets and link this back to formation. As giant planets are formed by accreting gas, ices, and rocks, constraining…

We present updated non-adiabatic and inhomogeneous evolution models for Uranus and Neptune, employing an interior composition of methane, ammonia, water, and rocks. Following formation trends of the gas giants, Uranus and Neptune formation…

Earth and Planetary Astrophysics · Physics 2025-07-28 Roberto Tejada Arevalo

Extremely irradiated hot Jupiters, exoplanets reaching dayside temperatures ${>}$2000 K, stretch our understanding of planetary atmospheres and the models we use to interpret observations. While these objects are planets in every other…

Earth and Planetary Astrophysics · Physics 2018-10-17 Joshua D. Lothringer , Travis Barman , Tommi Koskinen

As a rule, the orbital velocities of "hot Jupiters," i.e., exoplanets with masses comparable to the mass of Jupiter and orbital semi-major axes less than 0.1 AU, are supersonic relative to the stellar wind, resulting in the formation of a…

Earth and Planetary Astrophysics · Physics 2013-11-22 D. V. Bisikalo , P. V. Kaigorodov , D. E. Ionov , V. I Shematovich

The occurrence rate of cold Jupiters was found to depend on stellar mass. The formation environment in the protoplanetary disks regulates core formation and the subsequent gas accretion. In this study, we simulate giant planet formation via…

Earth and Planetary Astrophysics · Physics 2025-08-27 Sho Shibata , Ravit Helled

Several observational works have shown the existence of Jupiter-mass planets covering a wide range of semi-major axes around Sun-like stars. We aim to analyse the planetary formation processes around Sun-like stars that host a Jupiter-mass…

Earth and Planetary Astrophysics · Physics 2017-11-15 L. A. Darriba , G. C. de Elía , O. M. Guilera , A. Brunini

We investigate the critical core mass and the envelope growth timescale, assuming grain-free envelopes, to examine how small cores are allowed to form gas giants in the framework of the core accretion model. This is motivated by a…

Earth and Planetary Astrophysics · Physics 2015-05-18 Yasunori Hori , Masahiro Ikoma

The composition of a planet's atmosphere is determined by its formation, evolution, and present-day insolation. A planet's spectrum therefore may hold clues on its origins. We present a "chain" of models, linking the formation of a planet…

Earth and Planetary Astrophysics · Physics 2016-11-23 Christoph Mordasini , Roy van Boekel , Paul Mollière , Thomas Henning , Björn Benneke

Hot Jupiters are new laboratories for the physics of giant planet atmospheres. Subject to unusual forcing conditions, the circulation regime on these planets may be unlike anything known in the Solar System. Characterizing the atmospheric…

Astrophysics · Physics 2007-10-17 Adam P. Showman , Kristen Menou , James Y-K. Cho

Motivated by the observational evidence of inhomogeneous clouds in exoplanetary atmospheres, we investigate how proposed simple cloud distributions can affect atmospheric circulations and infrared emission. We simulated temperatures and…

Earth and Planetary Astrophysics · Physics 2017-11-29 Michael Roman , Emily Rauscher

Physical conditions in the atmospheres of tidally-locked, slowly-rotating hot Jupiters correspond to dynamical circulation regimes with Rhines scales and Rossby deformation radii comparable to the planetary radii. Consequently, the large…

Astrophysics · Physics 2009-11-11 Emily Rauscher , Kristen Menou , James Y-K. Cho , Sara Seager , Brad Hansen

For solar-system objects, ultraviolet spectroscopy has been critical in identifying sources for stratospheric heating and measuring the abundances of a variety of hydrocarbon and sulfur-bearing species, produced via photochemical…

Warm Jupiters with orbital periods of $\approx$10-365 d represent a population of giant planets located well within the water ice line but beyond the region of tidal influence of their host star relevant for high-eccentricity tidal…

Earth and Planetary Astrophysics · Physics 2025-10-06 Marvin Morgan , Brendan P. Bowler , Quang H. Tran

We have obtained long-slit, infrared spectra of Jupiter with the Anglo Australian Telescope in the K and H bands at a resolving power of 2260. Using a line-by-line, radiative transfer model with the latest, improved spectral line data for…

Solar and Stellar Astrophysics · Physics 2015-05-27 Lucyna Kedziora-Chudczer , Jeremy Bailey

Despite swift progress in the characterisation of exoplanet atmospheres in composition and structure, the study of atmospheric dynamics has not progressed at the same speed. While theoretical models have been developed to describe the lower…

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