The dynamics of the outer edge of Saturn’s A ring perturbed by the satellites Janus and Epimetheus

@article{Arajo2019TheDO,
  title={The dynamics of the outer edge of Saturn’s A ring perturbed by the satellites Janus and Epimetheus},
  author={N. C. S. Ara{\'u}jo and S. Renner and Nicholas J. Cooper and M El Moutamid and Carl D. Murray and Bruno Sicardy and E Vieira Neto},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019}
}
We present an analytical model to study the dynamics of the outer edge of Saturn's A ring. The latter is influenced by 7:6 mean motion resonances with Janus and Epimetheus. Because of the horseshoe motion of the two co-orbital moons, the ring edge particles are alternately trapped in a corotation eccentricity resonance (CER) or a Lindblad eccentricity resonance (LER). However, the resonance oscillation periods are longer than the 4-year interval between the switches in the orbits of Janus and… 

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