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Related papers: Saturn rings: fractal structure and random field m…

200 papers

Saturn's axial tilt of 26.7{\deg} produces seasons in a similar way as on Earth. Both the stratospheric temperature and composition are affected by this latitudinally varying insolation along Saturn's orbital path. A new time dependent 2D…

Earth and Planetary Astrophysics · Physics 2015-06-03 Vincent Hue , Thibault Cavalié , Michel Dobrijevic , Franck Hersant , Thomas K. Greathouse

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…

Among the persistent questions raised by the existence of a rotational modulation of the Saturn Kilometric Radiation (SKR), the origin of the variability of the 10.8 hours SKR period at a 1% level over weeks to years remains intriguing.…

Earth and Planetary Astrophysics · Physics 2011-02-16 Laurent Lamy

We investigate the dynamical behavior of rings around bodies whose shapes depart considerably from that of a sphere. To this end, we have developed a new self-gravitating discrete element N-body code, and employed a local simulation method…

Earth and Planetary Astrophysics · Physics 2017-10-24 Akash Gupta , Sharvari Nadkarni-Ghosh , Ishan Sharma

In this work, we model the radial density profile of the outer A ring of Saturn observed with Cassini cameras (Tiscareno & Harris 2018): An axisymmetric diffusion model has been developed, accounting for the outward viscous flow of the ring…

Earth and Planetary Astrophysics · Physics 2019-06-20 Fabio M. Grätz , Michael Seiler , Martin Seiß , Holger Hoffmann , Frank Spahn

We fit an isothermal oscillatory density model of Saturn's protoplanetary disk to the present-day major satellites and innermost rings D/C and we determine the radial scale length of the disk, the equation of state and the central density…

Earth and Planetary Astrophysics · Physics 2019-03-05 Dimitris M. Christodoulou , Demosthenes Kazanas

A well studied family of random fractals called fractal percolation is discussed. We focus on the projections of fractal percolation on the plane. Our goal is to present stronger versions of the classical Marstrand theorem, valid for almost…

Dynamical Systems · Mathematics 2013-06-18 Michal Rams , Károly Simon

It has been suggested that the north-polar hexagon found on Saturn is an unusual Rossby wave. If this is to be the case, one must not only explain how a Rossby wave can be hexagonal in shape, albeit with curved corners, but also why it is…

Atmospheric and Oceanic Physics · Physics 2018-03-07 Gerald E. Marsh

The Cassini mission provided key measurements needed to determine the absolute age of Saturn's rings, including the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy pollutants in the rings, and the total ring mass.…

Earth and Planetary Astrophysics · Physics 2023-05-24 R. H. Durisen , Paul. R. Estrada

This first of two papers is a speculation on the nature of Mach's Principle, derived from the formulation of two questions: (A) Can a globally inertial space and time be associated with a non-trivial global matter distribution? (B) If so,…

Astrophysics · Physics 2016-08-30 D F Roscoe

The Cassini spacecraft's Grand Finale orbits provided a unique opportunity to probe Saturn's gravity field and interior structure. Doppler measurements yielded unexpectedly large values for the gravity harmonics J_6, J_8, and J_10 that…

Earth and Planetary Astrophysics · Physics 2019-07-17 B. Militzer , S. Wahl , W. B. Hubbard

We present a new survey of the radial oscillation modes of neutron stars. This study complements and corrects earlier studies of radial oscillations. We present an extensive list of frequencies for the most common equations of state and…

General Relativity and Quantum Cosmology · Physics 2011-05-23 Kostas. D. Kokkotas , Johannes Ruoff

The Cassini mission in the Saturnian system is an outstanding opportunity to improve our knowledge of the satellites of Saturn. The data obtained thanks to this mission must be confronted to theoretical models. This paper aims at modeling…

Earth and Planetary Astrophysics · Physics 2015-05-30 Benoît Noyelles , Özgür Karatekin , Nicolas Rambaux

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

This chapter summarizes our current understanding of the ionosphere of Saturn. We give an overview of Saturn ionospheric science from the Voyager era to the present, with a focus on the wealth of new data and discoveries enabled by Cassini,…

Earth and Planetary Astrophysics · Physics 2021-06-23 Luke Moore , Marina Galand , Arvydas J. Kliore , Andrew F. Nagy , James O'Donoghue

Kilometer-sized moonlets in Saturn's A ring create S-shaped wakes called "propellers" in surrounding material. The Cassini spacecraft has tracked the motions of propellers for several years and finds that they deviate from Keplerian orbits…

Earth and Planetary Astrophysics · Physics 2015-06-05 Margaret Pan , Hanno Rein , Eugene Chiang , Steven N. Evans

We address the occurrence of narrow planetary rings and some of their structural properties, in particular when the rings are shepherded. We consider the problem as Hamiltonian {\it scattering} of a large number of non-interacting massless…

Astrophysics · Physics 2009-11-11 O. Merlo , L. Benet

A planet's magnetosheath extends from downstream of its bow shock up to the magnetopause where the solar wind flow is deflected around the magnetosphere and the solar wind embedded magnetic field lines are draped. This makes the region an…

Earth and Planetary Astrophysics · Physics 2015-02-20 A. H. Sulaiman , A. Masters , M. K. Dougherty , X. Jia

The hypothesis of a recent origin of Saturn's rings and its mid-sized moons is actively debated. It was suggested that a proto-Rhea and a proto-Dione might have collided recently, giving birth to the modern system of mid-sized moons. It is…

Earth and Planetary Astrophysics · Physics 2017-07-04 Ryuki Hyodo , Sébastien Charnoz

We investigate the formation of spatial structure in dense, self-gravitating particle systems such as Saturn's B-ring through local $N$-body simulations to clarify the intrinsic physics based on individual particle motion. In such a system,…

Astrophysics · Physics 2015-06-24 H. Daisaka , S. Ida