Dynamics Of Faint Rings Associated With Methone, Anthe And Pallene

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Scientific paper

Cassini images identified three tenuous rings (Hedman et al., this conference) along the orbits of Methone, Anthe and allene, three small moons that reside between Mimas and Enceladus. A continuous ring of material covers the orbit of Pallene, whereas the other two moons lie within arcs of finite longitudinal extent. Two of the moons, Anthe and Methone are known to lie in resonance with Mimas, whereas Pallene is in resonance with Enceladus. We present numerical simulations of particles ejected from these three small moons. We investigate the type of resonance these particles are in with respect to the parent moons along with the effect of local perturbations. The resonances in which Anthe and Methone reside are first-order while that of Pallene is third-order, which likely explains the confinement of material in the Anthe and Methone rings and the lack of confinement in the Pallene ring.

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