Planetary Rings

  title={Planetary Rings},
  author={Matthew S. Tiscareno},
Planetary rings are the only nearby astrophysical disks, and the only disks that have been investigated by spacecraft (especially the Cassini spacecraft orbiting Saturn). Although there are significant differences between rings and other disks, chiefly the large planet/ring mass ratio that greatly enhances the flatness of rings (aspect ratios as small as 10−7), understanding of disks in general can be enhanced by understanding the dynamical processes observed at close-range and in real-time in… Expand
Rings beyond the giant planets
Until 2013, only the giant planets were known to host ring systems. In June 2013, a stellar occulation revealed the presence of narrow and dense rings around Chariklo, a small Centaur object thatExpand
Secular Evolution Driven by Massive Eccentric Disks/Rings: An Apsidally Aligned Case
Massive eccentric disks (gaseous or particulate) orbiting a dominant central mass appear in many astrophysical systems, including planetary rings, protoplanetary and accretion disks in binaries, andExpand
Cassini RPWS Dust Observation Near the Janus/Epimetheus Orbit
  • S.-Y. Ye, W. Kurth, +7 authors R. Srama
  • Physics
  • Journal of Geophysical Research: Space Physics
  • 2018
During the Ring Grazing orbits near the end of Cassini mission, the spacecraft crossed the equatorial plane near the orbit of Janus/Epimetheus (~2.5 Rs). This region is populated with dust particlesExpand
Potential softening and eccentricity dynamics in razor-thin, nearly-Keplerian discs
The performance of several softening formalisms proposed in the literature are explored in reproducing the correct eccentricity dynamics in the disc potential and a general framework for computing secular disturbing function given an arbitrary softening prescription is developed. Expand
ALMA and NACO observations towards the young exoring transit system J1407 (V1400 Cen)
Our aim was to directly detect the thermal emission of the putative exoring system responsible for the complex deep transits observed in the light curve for the young Sco-Cen star 1SWASPExpand
The Exoplanet Handbook
1. Introduction 2. Radial velocities 3. Astrometry 4. Timing 5. Microlensing 6. Transits 7. Imaging 8. Host stars 9. Brown dwarfs and free-floating planets 10. Formation and evolution 11. InteriorsExpand


Warm Saturns: On the Nature of Rings around Extrasolar Planets That Reside inside the Ice Line
We discuss the nature of rings that may exist around extrasolar planets. Taking the general properties of rings around the gas giants in the solar system, we infer the likely properties of ringsExpand
Dusty Rings and Circumplanetary Dust: Observations and Simple Physics
Each giant planet is encircled by planetary rings, usually composed of particles centimeters to meters in radius, but each system also contains regions where much smaller dust grains predominate.Expand
Transit Detectability of Ring Systems around Extrasolar Giant Planets
We investigate whether rings around extrasolar planets could be detected from those planets' transit light curves. To this end, we develop a basic theoretical framework for calculating andExpand
The Asymmetric Time-Variable Rings of Mars
Abstract In this paper, we investigate the dynamics and steady-state behavior of the hypothetical circumplanetary dust rings associated with the two tiny satellites of Mars, Phobos and Deimos. TheseExpand
Long-term and large-scale viscous evolution of dense planetary rings
Abstract Planetary rings are common in the outer Solar System but their origin and long-term evolution is still a matter of debate. It is well known that viscous spreading is a major evolutionaryExpand
A common mass scaling for satellite systems of gaseous planets
It is shown that the overall properties of the satellite systems of Jupiter, Saturn and Uranus arise naturally, and it is suggested that similar processes could limit the largest moons of extrasolar Jupiter-mass planets to Moon-to-Mars size. Expand
Waves in planetary rings
The Voyager spacecraft revealed the rings of Saturn to have an unexpected richness of structure. Many of the observed features have now been identified as collective effects arising from theExpand
A deep search for Martian dust rings and inner moons using the Hubble Space Telescope
Abstract It has long been suspected that Mars might be encircled by two faint rings, one originating from each of its moons Phobos and Deimos. Meteoroid impacts into these moons should release cloudsExpand
Formation of the regular satellites of giant planets in an extended gaseous nebula I: subnebula model and accretion of satellites
We model the subnebulae of Jupiter and Saturn wherein satellite accretion took place. We expect each giant planet subnebula to be composed of an optically thick (given gaseous opacity) inner regionExpand
Structures induced by small moonlets in Saturn's rings: Implications for the Cassini Mission
[1] Particle simulations are carried out to study density features caused by small moonlets embedded in a dense planetary ring. The creation of a “propeller” like structure is found together withExpand