From birth associations to field stars: mapping the small-scale orbit distribution in the Galactic disc

@article{Coronado2020FromBA,
  title={From birth associations to field stars: mapping the small-scale orbit distribution in the Galactic disc},
  author={Johanna Coronado and Hans–Walter Rix and Wilma H. Trick and Kareem El-Badry and Jan Rybizki and Maosheng Xiang},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={495},
  pages={4098-4112}
}
  • J. Coronado, H. Rix, M. Xiang
  • Published 21 February 2020
  • Physics, Geology
  • Monthly Notices of the Royal Astronomical Society
Stars born at the same time in the same place should have formed from gas of the same element composition. But most stars subsequently disperse from their birth siblings, in orbit and orbital phase, becoming 'field stars'. Here we explore and provide direct observational evidence for this process in the Milky Way disc, by quantifying the probability that orbit-similarity among stars implies indistinguishable metallicity. We define the orbit similarity among stars through their distance in… 

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