Plausible Home Stars of the Interstellar Object ‘Oumuamua Found in Gaia DR2

  title={Plausible Home Stars of the Interstellar Object ‘Oumuamua Found in Gaia DR2},
  author={C. Bailer-Jones and D. Farnocchia and K. Meech and R. Brasser and M. Micheli and S. Chakrabarti and M. Buie and O. Hainaut},
  journal={The Astronomical Journal},
  • C. Bailer-Jones, D. Farnocchia, +5 authors O. Hainaut
  • Published 2018
  • Physics
  • The Astronomical Journal
  • The first detected interstellar object 'Oumuamua that passed within 0.25au of the Sun on 2017 September 9 was presumably ejected from a stellar system. We use its newly determined non-Keplerian trajectory together with the reconstructed Galactic orbits of 7 million stars from Gaia DR2 to identify past close encounters. Such an "encounter" could reveal the home system from which 'Oumuamua was ejected. The closest encounter, at 0.60pc (0.53-0.67pc, 90% confidence interval), was with the M2.5… CONTINUE READING

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