The orbits of open clusters in the Galaxy

  title={The orbits of open clusters in the Galaxy},
  author={Zhen-Yu Wu and Xu Zhou and Jun Ma and Cuihua Du},
  journal={Monthly Notices of the Royal Astronomical Society},
  • Z. Wu, Xu Zhou, +1 author C. Du
  • Published 21 September 2009
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We present and analyse the kinematics and orbits for a sample of 488 open clusters (OCs) in the Galaxy. The velocity ellipsoid for our present sample is derived as (σU, σV , σW ) = (28.7, 15.8, 11.0) km s −1 which represents a young thin-disc population. We also confirm that the velocity dispersions increase with the age of a cluster subsample. The orbits of OCs are calculated with three Galactic gravitational potential models. The errors of orbital parameters are also calculated considering… Expand
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