Tidal evolution into the Laplace resonance and the resurfacing of Ganymede

  title={Tidal evolution into the Laplace resonance and the resurfacing of Ganymede},
  author={A. Showman and R. Malhotra},
Abstract We use the numerical model of R. Malhotra (1991, Icarus 94, 399–412) to explore the orbital history of Io, Europa, and Ganymede for a large range of parameters and initial conditions near the Laplace resonance. We identify two new Laplace-like resonances which pump Ganymede's eccentricity and may help explain the resurfacing of Ganymede. Near the Laplace resonance, the Io–Europa conjunction drifts at a mean angular velocity ω 1 ≡ 2 n 2 − n 1 , while the Europa-Ganymede conjunction… Expand

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