Enceladus's and Dione's floating ice shells supported by minimum stress isostasy

@article{Beuthe2016EnceladussAD,
  title={Enceladus's and Dione's floating ice shells supported by minimum stress isostasy},
  author={M. Beuthe and A. Rivoldini and A. Trinh},
  journal={Geophysical Research Letters},
  year={2016},
  volume={43}
}
Enceladus' gravity and shape have been explained in terms of a thick isostatic ice shell floating on a global ocean, in contradiction of the thin shell implied by librations. Here we propose a new isostatic model minimizing crustal deviatoric stress, and demonstrate that gravity and shape data predict a 38 ± 4km-thick ocean beneath a 23 ± 4km-thick shell agreeing with – but independent from – libration data. Isostatic and tidal stresses are comparable in magnitude. South polar crust is only 7… Expand
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