Searching for correlations in Gaia DR2 unbound star trajectories

  title={Searching for correlations in Gaia DR2 unbound star trajectories},
  author={Francesco Montanari and David Barrado and Juan Garc{\'i}a-Bellido},
  journal={Monthly Notices of the Royal Astronomical Society},
Scattering events with compact objects are expected in the primordial black hole (PBH) cold dark matter (CDM) scenario, due to close encounters between stars and PBHs in the dense environments of dwarf spheroidals. We develop a Bayesian framework to search for correlations among Milky Way stellar trajectories and those of globular clusters and dwarf galaxies in the halo and in other nearby galaxies. We apply the method to a selection of hypervelocity stars (HVS) and globular clusters from the… 

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