• Analysis of Close Encounters With Ganymede and Callisto Using a Genetic n-Body Algorithm

    • Philip M. Winter
      Department of Astrophysics, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna
    • Mattia A. Galiazzo
      Department of Astrophysics, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna
    • Thomas I. Maindl
      Department of Astrophysics, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna
  • In this work we describe a genetic algorithm which is used in order to study orbits of minor bodies in the frames of close encounters. We find that the algorithm in combination with standard orbital numerical integrators can be used as a good proxy for finding typical orbits of minor bodies in close encounters with planets and even their moons, saving a lot of computational time compared to long-term orbital numerical integrations. Here, we study close encounters of Centaurs with Callisto and Ganymede in particular. We also perform n-body numerical simulations for comparison. We find typical impact velocities to be between υrel = 20[υesc] and υrel = 30[υesc] for Ganymede and between υrel = 25[υesc] and υrel = 35[υesc] for Callisto.

  • PDF

  • http://phaidra.univie.ac.at/o:1032914

  • Article

  • Published Version

  • 2018

  • 5

  • Frontiers Media SA

  • English

  • Open access

  • CC BY Attribution 4.0 International
    © 2018 Winter, Galiazzo and Maindl

  • S11603-N16 – Austrian Science Fund (FWF)

  • P23810-N16 – Austrian Science Fund (FWF)

  • 2296-987X

  • Callisto; Ganymede; n-body; close encounters; genetic algorithm; celestial mechanics; numerical simulation; collisions