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Related papers: New constraints on Saturn's interior from Cassini …

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Saturn's rings are composed of icy grains, most in the mm to m size ranges, undergoing several collisions per orbit. Their collective behaviour generates a remarkable array of structure over many orders of magnitude, much of it not well…

Earth and Planetary Astrophysics · Physics 2023-01-18 Rémy Larue , Henrik Latter , Hanno Rein

A tidal interaction between a star and a close-in exoplanet leads to shrinkage of the planetary orbit and eventual tidal disruption of the planet. Measuring the shrinkage of the orbits will allow for the tidal quality parameter of the star…

Earth and Planetary Astrophysics · Physics 2022-12-14 N. M. Rosário , S. C. C. Barros , O. D. S. Demangeon , N. C. Santos

Transmission spectroscopy presents one of the most successful approaches for investigating the atmospheres of exoplanets. We analyzed the near-infrared high-resolution transmission spectrum of a hot Saturn, HD 149026 b, taken using CARMENES…

Earth and Planetary Astrophysics · Physics 2024-07-02 Sayyed A. Rafi , Stevanus K. Nugroho , Motohide Tamura , Lisa Nortmann , Alejandro Sánchez-López

The solar tide in an ancient Venusian ocean is simulated using a dedicated numerical tidal model. Simulations with varying ocean depth and rotational periods ranging from -243 to 64 sidereal Earth days are used to calculate the tidal…

Earth and Planetary Astrophysics · Physics 2019-08-07 J. A. M. Green , M. J. Way , R. Barnes

WASP-12b stands out among the planets of its class of hot Jupiters because of the observed fast orbital decay attributed to tidal dissipation. The measured rate of the orbital period is $\stackrel{\bf\centerdot}{\textstyle{P}}_{\rm…

Earth and Planetary Astrophysics · Physics 2022-03-29 Michael Efroimsky , Valeri V. Makarov

Density waves in Saturn's rings are usually tightly wrapped spiral patterns generated by resonances with either Saturn's moons or structures inside the planet. However, between the Barnard and Bessel Gaps in the Cassini Division (i.e.…

Earth and Planetary Astrophysics · Physics 2019-02-27 M. M. Hedman , P. D. Nicholson

We study the relationship of zonal gravity coefficients, J_2n, zonal winds, and axial moment of inertia (MoI) by constructing models for the interiors of giant planets. We employ the nonperturbative concentric Maclaurin spheroid (CMS)…

Earth and Planetary Astrophysics · Physics 2023-08-10 Burkhard Militzer , William B. Hubbard

We present observations at optical wavelengths with the Cassini Spacecraft's Imaging Science System of the Phoebe ring, a vast debris disk around Saturn that seems to be collisionally generated by its irregular satellites. The analysis…

Earth and Planetary Astrophysics · Physics 2016-05-25 Daniel Tamayo , Stephen R. Markham , Matthew M. Hedman , Joseph A. Burns , Douglas P. Hamilton

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…

We are witness to a great and increasing interest in internal structure, composition and evolution of exoplanets. However, direct measurements of exoplanetary mass and radius cannot be uniquely interpreted in terms of interior structure,…

Earth and Planetary Astrophysics · Physics 2019-06-26 Hugo Hellard , Szilárd Csizmadia , Sebastiano Padovan , Heike Rauer , Juan Cabrera , Frank Sohl , Tilman Spohn , Doris Breuer

Saturn's magnetic field is remarkably axisymmetric. Its dipole axis is inclined by less than 0.2 deg with respect to its rotation axis. Rotationally driven convection of magnetospheric plasma breaks the axisymmetry of its external magnetic…

Astrophysics · Physics 2015-06-24 Peter Goldreich , Alison J. Farmer

The origin and long-term evolution of Saturn's rings is still an unsolved problem in modern planetary science. In this chapter we review the current state of our knowledge on this long-standing question for the main rings (A, Cassini…

Earth and Planetary Astrophysics · Physics 2015-05-14 Sebastien Charnoz , Luke Dones , Larry W. Esposito , Paul R. Estrada , Matthew M. Hedman

We use a simple model of the dynamics of a narrow-eccentric ring, to put some constraints on some of the observable properties of the real systems.In this work we concentrate on the case of the `Titan ringlet of Saturn'.Our approach is…

Astrophysics · Physics 2009-11-10 M. D. Melita , J. C. B. Papaloizou

We use a state-of-the-art physics-based model of electromagnetic scattering to analyze average circular polarization ratios measured for the A and B rings of Saturn at a wavelength of 12.6 cm. This model is directly based on the Maxwell…

Astrophysics · Physics 2011-02-11 Michael I. Mishchenko , Janna M. Dlugach

Context: The Solar System giant planets harbour a wide variety of moons. Moons around exoplanets are plausibly similarly abundant, even though most of them are likely too small to be easily detectable with modern instruments. Moons are…

Earth and Planetary Astrophysics · Physics 2026-01-28 Yubo Su , Melaine Saillenfest

Context. Recent developments in exoplanetary research highlight the importance of Love numbers in understanding their internal dynamics, formation, migration history and their potential habitability. Love numbers represent crucial…

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…

The disruption of an icy moon in a collision with an interloping comet a few hundred million years ago is a simple way to create Saturn's rings. A ring parent moon with a mass comparable to Mimas could be trapped in mean motion resonance…

Earth and Planetary Astrophysics · Physics 2018-12-03 John Dubinski

The seasonal evolution of Saturn's polar atmospheric temperatures and hydrocarbon composition is derived from a decade of Cassini Composite Infrared Spectrometer (CIRS) 7-16 $\mu$m thermal infrared spectroscopy. We construct a…

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
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