Long-term effects of the Galactic tide on cometary dynamics

  title={Long-term effects of the Galactic tide on cometary dynamics},
  author={Marc Fouchard and Ch. Froeschl{\'e} and Giovanni B. Valsecchi and Hans Rickman},
  journal={Celestial Mechanics and Dynamical Astronomy},
We introduce a model for integrating the effects of Galactic tides on Oort cloud comets, which involves two procedures, according to the values of the osculating semi-major axis a and eccentricity e. Ten simulations of the dynamics of 106 comets over 5 Gyr are performed using this model. We thus investigate the long-term effects of the Galactic tide with and without a radial component, the effects of the local density of the Galactic disk, and those of the Oort constants. Most of the results… 
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