Cassini Ring Seismology as a Probe of Saturn’s Interior. I. Rigid Rotation

@article{Mankovich2019CassiniRS,
  title={Cassini Ring Seismology as a Probe of Saturn’s Interior. I. Rigid Rotation},
  author={Christopher R. Mankovich and Mark. S. Marley and Jonathan J. Fortney and Naor Movshovitz},
  journal={The Astrophysical Journal},
  year={2019},
  volume={871}
}
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 the gravity field and compute their adiabatic mode eigenfrequencies and corresponding Lindblad and vertical resonances in Saturn’s C ring, where more than 20 waves with pattern speeds faster than the ring mean motion have been detected and characterized using high-resolution Cassini Visual and… 
View on IOP Publishing
arxiv.org
54 Citations
Highly Influential Citations
2
Background Citations
12
Methods Citations
6
Results Citations
2

Figures and Tables from this paper

54 Citations

Constraining Saturn’s Interior with Ring Seismology: Effects of Differential Rotation and Stable Stratification
Normal mode oscillations in Saturn excite density and bending waves in the C ring, providing a valuable window into the planet’s interior. Saturn’s fundamental modes (f-modes) excite the majority of…
Kronoseismology V: A Panoply of Waves in Saturn's C Ring Driven by High-Order Internal Planetary Oscillations.
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…
Saturn's Rings as a Seismograph to Probe Saturn's Internal Structure
As it has already done for Earth, the Sun, and the stars, seismology has the potential to radically change the way the interiors of giant planets are studied. In a sequence of events foreseen by only…
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…
Cassini-Huygens’ exploration of the Saturn system: 13 years of discovery
TLDR
The Cassini-Huygens mission to Saturn provided a close-up study of the gas giant planet, as well as its rings, moons, and magnetosphere, and results show that Saturn's rings are substantially younger than the planet itself and constrain models of their origin.
Cassini Exploration of the Planet Saturn: A Comprehensive Review
TLDR
Key discoveries and events include watching the eruption of a planet-encircling storm, detection of gravity perturbations from winds 9000 km below the tops of the clouds, demonstration that eddies are supplying energy to the zonal jets, which are remarkably steady over the 25-year interval since the Voyager encounters.
Understanding Saturn’s interior from the Cassini Grand Finale gravity measurements
  • D. Ni
  • Physics, Geology
    Astronomy & Astrophysics
  • 2020
Context. Measurements of Saturn’s gravity field by Cassini Grand Finale have been acquired with high precision. It has been demonstrated that the even gravitational harmonics J6–J10 have larger…
Combined magnetic and gravity measurements probe the deep zonal flows of the gas giants
<p>The strong zonal flows observed at the cloud-level of the gas giants extend thousands of kilometers deep into the planetary interior, as indicated by the Juno and Cassini gravity measurements.…
No Evidence for Time Variation in Saturn’s Internal Magnetic Field
The time variation of a planetary magnetic field can reveal important aspects of a planet's interior structure. Searching for time variation in planetary magnetic fields other than Earth has proved…
...
...

References

SHOWING 1-10 OF 71 REFERENCES
KRONOSEISMOLOGY: USING DENSITY WAVES IN SATURN'S C RING TO PROBE THE PLANET'S INTERIOR
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…
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…
Saturn’s rotation period from its atmospheric planetary-wave configuration
The rotation period of a gas giant's magnetic field (called the System III reference frame) is commonly used to infer its bulk rotation. Saturn's dipole magnetic field is not tilted relative to its…
Resonance structures in Saturn's rings probed by radio occultation. I - Methods and examples
Detection of Jovian seismic waves: a new probe of its interior structure
Knowledge of Jupiter’s deep interior would provide unique constraints on the formation of the Solar System. Measurement of its core mass and global composition would shed light on whether the planet…
Waves in Cassini UVIS stellar occultations. 2. The C ring
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…
Kronoseismology III: Waves in Saturn’s inner C ring
Noncircular features in Saturn’s rings II: The C ring
Resonance structures in Saturn's rings probed by radio occultation: II. Results and interpretation
...
...