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How deep do Saturn's zonal winds penetrate below the cloud-level has been a decades-long question, with important implications not only for the atmospheric dynamics, but also for the interior density structure, composition, magnetic field…

Earth and Planetary Astrophysics · Physics 2019-02-13 Eli Galanti , Yohai Kaspi , Yamila Miguel , Tristan Guillot , Daniele Durante , Paolo Racioppa , Luciano Iess

Interior modeling of Jupiter and Saturn has advanced to a state where thousands of models are generated that cover the uncertainty space of many parameters. This approach demands a fast method of computing their gravity field and shape.…

Earth and Planetary Astrophysics · Physics 2021-11-01 N. Nettelmann , N. Movshovitz , D. Ni , J. J. Fortney , E. Galanti , Y. Kaspi , R. Helled , C. R. Mankovich , S. Bolton

The internal structure of Jupiter is constrained by the precise gravity field measurements by NASA's Juno mission, atmospheric data from the Galileo entry probe, and Voyager radio occultations. Not only are these observations few compared…

Earth and Planetary Astrophysics · Physics 2024-12-10 Maayan Ziv , Eli Galanti , Saburo Howard , Tristan Guillot , Yohai Kaspi

A new method based on continuous wavelet transform with the complex Morlet wavelet to analyze Saturn main rings is presented. It allows to investigate in detail the resonance zones and reveal the coexistence of waves with stable periods and…

Astrophysics · Physics 2007-05-23 E. B. Postnikov , A. Loskutov

Normal mode oscillations in Saturn excite density and bending waves in the C Ring, providing a valuable window into the planet's interior. Saturn's fundamental modes (f modes) excite the majority of the observed waves, while…

Earth and Planetary Astrophysics · Physics 2021-12-20 Janosz W. Dewberry , Christopher R. Mankovich , Jim Fuller , Dong Lai , Wenrui Xu

Saturn's magnetospheric magnetic field, planetary radio emissions, plasma populations and magnetospheric structure are all known to be modulated at periods close to the assumed rotation period of the planetary interior. These oscillations…

Anderson & Schubert (2007, Science,317,1384) proposed that Saturn's rotation period can be ascertained by minimizing the dynamic heights of the 100 mbar isosurface with respect to the geoid; they derived a rotation period of 10h 32m 35s. We…

Earth and Planetary Astrophysics · Physics 2019-03-28 Ravit Helled , Gerald Schubert , John D. Anderson

Certain spiral density waves in Saturn's rings are generated through resonances with planetary normal modes, making them valuable probes of Saturn's internal structure. Previous research has primarily focused on the rotation rates of these…

We use the clathrate hydrate trapping theory to calculate the enrichments in O, N, S, Xe, Ar and Kr compared to solar in Saturn's atmosphere. For this, we calibrate our calculations using two different carbon abundance determinations that…

Astrophysics · Physics 2009-11-11 Olivier Mousis , Yann Alibert , Willy Benz

We construct models for Jupiter's interior that match the gravity data obtained by the Juno and Galileo spacecrafts. To generate ensembles of models, we introduce a novel quadratic Monte Carlo technique that is more efficient in confining…

Earth and Planetary Astrophysics · Physics 2023-08-10 Burkhard Militzer

Plasma rotation plays a large role in determining the size and shape of Saturn's disc-like magnetosphere. A magnetosphere more confined to the equator in the polar regions is expected as a result of the interaction between this type of…

Probing the interiors of the gas giant planets in our Solar System is not an easy task. It requires a set of accurate measurements combined with theoretical models that are used to infer the planetary composition and its depth dependence.…

Earth and Planetary Astrophysics · Physics 2018-12-19 Ravit Helled

The excitation of density and bending waves in Saturn's C ring by planetary oscillation modes presents a unique opportunity to learn about gas giant interiors and rotation. However, theoretical complications related to Saturn's rapid and…

Earth and Planetary Astrophysics · Physics 2022-09-14 Janosz W. Dewberry , Christopher R. Mankovich , Jim Fuller

Seismology allows for direct observational constraints on the interior structures of stars and planets. Recent observations of Saturn's ring system have revealed the presence of density waves within the rings excited by oscillation modes…

Earth and Planetary Astrophysics · Physics 2015-04-30 Jim Fuller

During the thirteen years in orbit around Saturn before its final plunge, the Cassini spacecraft provided more than ten thousand astrometric measurements. Such large amounts of accurate data enable the search for extremely faint signals in…

Earth and Planetary Astrophysics · Physics 2019-03-11 Valéry Lainey , Benoît Noyelles , Nicholas Cooper , Carl Murray , Ryan Park , Nicolas Rambaux

Using astrometric observations spanning more than a century and including a large set of Cassini data, we determine Saturn's tidal parameters through their current effects on the orbits of the eight main and four coorbital moons. We have…

We present two new in situ core accretion simulations of Saturn with planet formation timescales of 3.37 Myr (model S0) and 3.48 Myr (model S1), consistent with observed protostellar disk lifetimes. In model S0, we assume rapid grain…

Knowledge of Saturn's axial moment of inertia can provide valuable information on its internal structure. We suggest that Saturn's angular momentum may be determined by the Solstice Mission (Cassini XXM) by measuring Saturn's pole…

Earth and Planetary Astrophysics · Physics 2015-05-28 Ravit Helled

A new model for the shape of the prominent eccentric ringlet in the gap exterior to Saturn's B-ring is developed based on Cassini imaging observations taken over about 8 years. Unlike previous treatments, the new model treats each edge of…

Earth and Planetary Astrophysics · Physics 2016-08-31 Joseph N. Spitale , Joseph M. Hahn

Interior models of Jupiter and Saturn are calculated and compared in the framework of the three-layer assumption, which rely on the perception that both planets consist of three globally homogeneous regions: a dense core, a metallic…

Astrophysics · Physics 2009-10-31 Tristan Guillot