Close encounters of the stellar kind

  title={Close encounters of the stellar kind},
  author={Coryn A. L. Bailer-Jones},
  journal={arXiv: Solar and Stellar Astrophysics},
  • C. Bailer-Jones
  • Published 11 December 2014
  • Physics
  • arXiv: Solar and Stellar Astrophysics
Stars which pass close to the Sun can perturb the Oort cloud, injecting comets into the inner solar system where they may collide with the Earth. Using van Leeuwen's re-reduction of the Hipparcos data complemented by the original Hipparcos and Tycho-2 catalogues, along with recent radial velocity surveys, I integrate the orbits of over 50 000 stars through the Galaxy to look for close encounters. The search uses a Monte Carlo simulation over the covariance of the data in order to properly… 

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