The Phase Space Structure In Pluto-Charon System

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Two satellites, Hydra and Nix, were recently discovered around the barycentre of the binary system Pluto-Charon. Nix and Hydra are located around 49500km and 65000km from the barycentre of the system near the 1:4 and 1:6 resonances with Charon, respectively. In this work we analysed the dynamics of small bodies in the internal and external regions of Pluto-Charon system. From the circular, planar and restricted three body problem, Pluto-Charon and a massless particle, the chaotic and stable zones were determined by using Poincaré Surface of Section (PSS). We also identified the resonances responsible for the regular regions. A particular set of PSS was generated in order to analyse the evolution of the 1:4 and
1:6 asymmetric resonances. The trajectory of a particle in these resonant locations are also presented. From the PSS a grade a X e representing the limits of the resonant regions were generated. We concluded that neither of the new satellites are librating in resonance with Charon.
AHFG and SMGW thank FAPESP for the financial support.

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