KRONOSEISMOLOGY: USING DENSITY WAVES IN SATURN'S C RING TO PROBE THE PLANET'S INTERIOR

@article{Hedman2013KRONOSEISMOLOGYUD,
  title={KRONOSEISMOLOGY: USING DENSITY WAVES IN SATURN'S C RING TO PROBE THE PLANET'S INTERIOR},
  author={Matthew M. Hedman and Philip D. Nicholson},
  journal={The Astronomical Journal},
  year={2013},
  volume={146}
}
Saturn's C ring contains multiple spiral patterns that appear to be density waves driven by periodic gravitational perturbations. In other parts of Saturn's rings, such waves are generated by Lindblad resonances with Saturn's various moons, but most of the wave-like C-ring features are not situated near any strong resonance with any known moon. Using stellar occultation data obtained by the Visual and Infrared Mapping Spectrometer on board the Cassini spacecraft, we investigate the origin of… 
Kronoseismology. VI. Reading the Recent History of Saturn’s Gravity Field in Its Rings
Saturn’s C ring contains multiple structures that appear to be density waves driven by time-variable anomalies in the planet’s gravitational field. Semiempirical extensions of density wave theory
Kronoseismology. IV. Six Previously Unidentified Waves in Saturn’s Middle C Ring
Recent studies of stellar occultations observed by the Visual and Infrared Mapping Spectrometer on board the Cassini spacecraft have demonstrated that multiple spiral wave structures in Saturn’s
More Kronoseismology with Saturn's rings
In a previous paper (Hedman and Nicholson 2013), we developed tools that allowed us to confirm that several of the waves in Saturn's rings were likely generated by resonances with fundamental
Cassini Ring Seismology as a Probe of Saturn’s Interior. I. Rigid Rotation
Seismology of the gas giants holds the potential to resolve long-standing questions about their internal structure and rotation state. We construct a family of Saturn interior models constrained by
EXPLORING OVERSTABILITIES IN SATURN'S A RING USING TWO STELLAR OCCULTATIONS
Certain regions of Saturn's rings exhibit periodic opacity variations with characteristic radial wavelengths of up to a few hundred meters that have been attributed to viscous overstabilities. The
Unusual one-armed density waves in the Cassini Division of Saturn's rings
Noncircular features in Saturn’s rings II: The C ring
...
...

References

SHOWING 1-10 OF 19 REFERENCES
Planetary Acoustic Mode Seismology: Saturn's Rings
We examine the hypothesis that the rings of Saturn may act as a seismograph, recording gravitational perturbations associated with acoustic oscillation modes of the planet. The resonant interaction
STRONG TIDAL DISSIPATION IN SATURN AND CONSTRAINTS ON ENCELADUS' THERMAL STATE FROM ASTROMETRY
Tidal interactions between Saturn and its satellites play a crucial role in both the orbital migration of the satellites and the heating of their interiors. Therefore, constraining the tidal
Saturn’s Curiously Corrugated C Ring
TLDR
A subtle corrugation that extends across the entire C ring is revealed, suggesting that this structure results from differential nodal regression within a ring that became tilted relative to Saturn’s equator plane in 1983 and arose because interplanetary debris struck the rings.
The Titan -1:0 Nodal Bending Wave in Saturn's Ring C
TLDR
The most prominent oscillatory feature observed in the Voyager 1 radio occultation of Saturn's rings is identified as a one-armed spiral bending wave excited by Titan's -1:0 nodal inner vertical resonance, which suggests that surface mass density is not constant in the wave region.
THE ARCHITECTURE OF THE CASSINI DIVISION
TLDR
It is suggested that most of the gaps in the Cassini Division are produced by resonances involving perturbation from the massive edge of the B ring, and a combination of gravitational perturbations generated by the radial excursions in the B-ring edge and the gravitational perturbed from the Mimas 2:1 ILR yields terms in the equations of motion that should act to constrain the pericenter location of particle orbits.
...
...