DOI:10.1126/science.1250551 - Corpus ID: 28990283
The Gravity Field and Interior Structure of Enceladus
@article{Iess2014TheGF, title={The Gravity Field and Interior Structure of Enceladus}, author={Luciano Iess and David J. Stevenson and Marzia Parisi and Douglas James Hemingway and Robert A. Jacobson and Jonathan I. Lunine and Francis Nimmo and John W. Armstrong and Sami W. Asmar and Marco Ducci and Paolo Tortora}, journal={Science}, year={2014}, volume={344}, pages={78 - 80}, url={https://api.semanticscholar.org/CorpusID:28990283}}- L. IessD. StevensonP. Tortora
- Published inScience4 April 2014
- Environmental Science, Geology, Physics
The quadrupole gravity field of Enceladus and its hemispherical asymmetry is determined using Doppler data from three spacecraft flybys to indicate the presence of a negative mass anomaly in the south-polar region, largely compensated by a positive subsurface anomaly compatible with the existence of a regional subsurfaced sea at depths of 30 to 40 kilometers.
395 Citations
395 Citations
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The thermal and orbital evolution of Enceladus : observational constraints and models
- F. NimmoA. BarrM. BěhounkováW. McKinnon
- 2017
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34 References
Gravity Field, Shape, and Moment of Inertia of Titan
- L. IessN. RappaportS. Asmar
- 2010
Physics, Geology
Gravity data from four flybys of the Cassini spacecraft past Saturn's moon, Titan, is used to model the moon's gravity field and probe its deep interior structure, implying that Titan is a partially differentiated body with a core consisting of a mix of ice and rock or hydrated silicates.
Enceladus: Present internal structure and differentiation by early and long-term radiogenic heating
- G. SchubertJ. AndersonB. TravisJ. Palguta
- 2007
Physics, Geology
The Tides of Titan
- L. IessR. JacobsonP. Tortora
- 2012
Physics, Environmental Science
Gravity data from six flybys of Saturn's moon, Titan, by the Cassini spacecraft suggest that Titan's interior is flexible on tidal time scales with the magnitude of the observed tidal deformations being consistent with the existence of a global subsurface water ocean.
Cassini Encounters Enceladus: Background and the Discovery of a South Polar Hot Spot
- J. SpencerJ. PearlRosaly M. C. Lopes
- 2006
Environmental Science, Physics
Cassini's Composite Infrared Spectrometer (CIRS) detected 3 to 7 gigawatts of thermal emission from the south polar troughs at temperatures up to 145 kelvin or higher, making Enceladus only the third known solid planetary body—after Earth and Io—that is sufficiently geologically active for its internal heat to be detected by remote sensing.
Diapir-induced reorientation of Saturn's moon Enceladus
- F. NimmoR. Pappalardo
- 2006
Environmental Science, Geology
This work shows that the current polar location of the hotspot of Enceladus can be explained by reorientation of the satellite's rotation axis because of the presence of a low-density diapir, and predicts that the distribution of impact craters on the surface will not show the usual leading hemisphere–trailing hemisphere asymmetry.
An observed correlation between plume activity and tidal stresses on Enceladus
- M. HedmanC. GosmeyerM. Showalter
- 2013
Physics, Environmental Science
It is reported that the plume’s horizontally integrated brightness is several times greater when Enceladus is near the point in its eccentric orbit where it is furthest from Saturn than it is when close to the point of closest approach to the planet.
Gravity field and interior of Rhea from Cassini data analysis
- L. IessN. RappaportF. Zingoni
- 2007
Physics, Geology
Librational response of Enceladus
- N. RambauxJ. Castillo‐RogezJames G. WilliamsÖ. Karatekin
- 2010
Physics, Geology
Physical librations could significantly contribute to Enceladus' geophysics through their influence on tidal stress. Therefore it is important to determine their behavior and the present paper is…
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