Cosmography of OB stars in the solar neighbourhood

  title={Cosmography of OB stars in the solar neighbourhood},
  author={Herv{\'e} Bouy and Jo{\~a}o Alves},
  journal={Astronomy and Astrophysics},
  • H. Bouy, J. Alves
  • Published 1 December 2015
  • Physics
  • Astronomy and Astrophysics
We construct a 3D map of the spatial density of OB stars within 500 pc from the Sun using the Hipparcos catalogue and find three large-scale stream-like structures that allow a new view on the solar neighbourhood. The spatial coherence of these blue streams and the monotonic age sequence over hundreds of parsecs suggest that they are made of young stars, similar to the young streams that are conspicuous in nearby spiral galaxies. The three streams are 1) the Scorpius to Canis Majoris stream… 

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