Resolved Gaia Triples

  title={Resolved Gaia Triples},
  author={Andrei Tokovinin},
  journal={The Astrophysical Journal},
  • A. Tokovinin
  • Published 22 December 2021
  • Physics
  • The Astrophysical Journal
A sample of 392 low-mass hierarchical triple stellar systems within 100 pc resolved by Gaia as distinct sources is defined. Owing to the uniform selection, the sample is ideally suited to study unbiased statistics of wide triples. The median projected separations in their inner and outer pairs are 151 and 2569 au, respectively, and the median separation ratio is close to 15. Some triples appear in nonhierarchical configurations, and many are just above the dynamical stability limit. Internal…