Accretion of Saturn's mid-sized moons during the viscous spreading of young massive rings: Solving the paradox of silicate-poor rings versus silicate-rich moons

  title={Accretion of Saturn's mid-sized moons during the viscous spreading of young massive rings: Solving the paradox of silicate-poor rings versus silicate-rich moons},
  author={S{\'e}bastien Charnoz and Aur{\'e}lien Crida and Julie C. Castillo-Rogez and Val{\'e}ry Lainey and Luke Dones and Ozgur Karatekin and Gabriel Tobie and St'ephane Mathis and Christophe Le Poncin-lafitte and Julien Salmon},
Abstract The origin of Saturn’s inner mid-sized moons (Mimas, Enceladus, Tethys, Dione and Rhea) and Saturn’s rings is debated. Charnoz et al. [Charnoz, S., Salmon J., Crida A., 2010. Nature 465, 752–754] introduced the idea that the smallest inner moons could form from the spreading of the rings’ edge while Salmon et al. [Salmon, J., Charnoz, S., Crida, A., Brahic, A., 2010. Icarus 209, 771–785] showed that the rings could have been initially massive, and so was the ring’s progenitor itself… Expand
Evolution of Saturn ’ s mid-sized icy moons
We aim to reproduce the orbits (semi-major axes a and eccentricities e) and interiors (core radii, oceans) of the mid-sized moons of Saturn (Mimas, Enceladus, Tethys, Dione, and Rhea) as constrainedExpand
Evolution of Saturn’s Mid-Sized Moons
A coupled thermal, geophysical and dynamical simulation covering 4.5 Gyr of evolution of Saturn’s inner mid-sized moons shows that, with the possible exception of Mimas, they formed early in Saturn‘s history. Expand
Orbital evolution of Saturn’s mid-sized moons and the tidal heating of Enceladus
Abstract The formation and orbital evolution of Saturn’s inner mid-sized moons – Rhea, Dione, Tethys, Enceladus, and Mimas – are still debated. The most puzzling aspects are 1) how the Tethys–DioneExpand
It is found that ring torques and capture of moons into mutual resonances produces a system of ice-rich inner moons that extends outward to approximately Tethys's orbit in 109 years, even with relatively slow orbital expansion due to tides. Expand
Dynamical Evolution of the Debris Disk after a Satellite Catastrophic Disruption around Saturn
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 theExpand
Dynamical Evidence for a Late Formation of Saturn's Moons
We explore the past evolution of Saturn's moons using direct numerical integrations. We find that the past Tethys-Dione 3:2 orbital resonance predicted in standard models likely did not occur,Expand
The origin of Saturn's rings and moons
  • S. Ida
  • Medicine, Physics
  • Science
  • 2019
Results from the Cassini mission's ring-grazing orbit and Grand Finale observations are reported, which reveal the detailed structure of the rings and associated moons and strongly suggest that Saturn's rings are much younger than Saturn itself and provide important clues to the origin of the Rings and moons. Expand
The origin and evolution of a differentiated Mimas
Abstract In stark contrast with its neighbor moon Enceladus, Mimas is surprisingly geologically quiet, despite an eccentric orbit and distance to Saturn prone to levels of tidal dissipation 30 timesExpand
On the formation of the martian moons from a circum-martian accretion disk
Abstract We reconsider two scenarios for the formation of Phobos and Deimos from a circum-martian accretion disk of debris: the strong tide regime for which accretion occurs close to the planet atExpand
Late origin of the Saturn system
Saturn is orbited by a half dozen ice rich middle-sized moons (MSMs) of diverse geology and composition. These comprise � 4.4% of Saturn’s satellite mass; the rest is Titan, more massive per planetExpand


Origin of Saturn’s rings and inner moons by mass removal from a lost Titan-sized satellite
Numerical simulations of the tidal removal of mass from a differentiated, Titan-sized satellite as it migrates inward towards Saturn result in a pure ice ring much more massive than Saturn’s current rings. Expand
The recent formation of Saturn's moonlets from viscous spreading of the main rings
A hybrid simulation is reported in which the viscous spreading of Saturn’s rings beyond the Roche limit (the distance beyond which the rings are gravitationally unstable) gives rise to the small moons. Expand
Deciphering the origin of the regular satellites of gaseous giants ― Iapetus: The Rosetta ice-moon
Abstract Ever since their discovery the regular satellites of Jupiter and Saturn have held out the promise of providing an independent set of observations with which to test theories of planetExpand
A belt of moonlets in Saturn’s A ring
Embedded moonlets found in Saturn’s A ring are probably the remnants of a shattered ring-moon of Pan size or larger, locally contributing new material to the older ring, which supports the theory of catastrophic ring creation in a collisional cascade. Expand
100-metre-diameter moonlets in Saturn's A ring from observations of 'propeller' structures
The observation of four longitudinal double-streaks in an otherwise bland part of the mid-A ring is reported, infering that these ‘propeller’-shaped perturbations arise from the effects of embedded moonlets approximately 40 to 120 m in diameter. Expand
Saturn's Small Inner Satellites: Clues to Their Origins
Cassini images of Saturn's small inner satellites have yielded their sizes, shapes, and in some cases, topographies and mean densities, and numerical N-body simulations of accretionary growth have provided clues to their internal structures and origins. Expand
On the Origins of the Saturnian Moon-Ring System
We examine a recent proposal [1] concerning the origin of Saturn’s rings and inner moons by tidal massstripping from the mantle of a differentiated Titan-sized satellite that is lost to the planet.Expand
The Thermal Evolution and Internal Structure of Saturn's Mid-Sized Icy Satellites
The Cassini-Huygens mission is returning new geophysical data for the midsize, icy satellites of Saturn (i.e., satellites with radii between 100 and 1,000 km). These data have enabled a newExpand
Did Saturn's rings form during the Late Heavy Bombardment?
Abstract The origin of Saturn's massive ring system is still unknown. Two popular scenarios—the tidal splitting of passing comets and the collisional destruction of a satellite—rely on a highExpand
Origin and Evolution of Saturn's Ring System
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-standingExpand