New stellar encounters discovered in the second Gaia data release

  title={New stellar encounters discovered in the second Gaia data release},
  author={Coryn A. L. Bailer-Jones and Jan Rybizki and Ren{\'e} Andrae and Morgan Fouesneau},
  journal={Astronomy \& Astrophysics},
Passing stars may play an important role in the evolution of our solar system. We search for close stellar encounters to the Sun among all 7.2 million stars in Gaia DR2 that have six-dimensional phase space data. We characterize encounters by integrating their orbits through a Galactic potential and propagating the correlated uncertainties via a Monte Carlo resampling. After filtering to remove spurious data, we find 694 stars that have median (over uncertainties) closest encounter distances… 
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