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Galactic Kinematics from Open Clusters

Published online by Cambridge University Press:  01 August 2006

Zi Zhu*
Affiliation:
Department of Astronomy, Nanjing University, China email: zhuzi@nju.edu.cn
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On the basis of the astrophysical parameters of the Galactic open clusters published in the recent years, we have selected ~300 clusters completely with all measurements of their kinematical parameters. Almost all the clusters have a heliocentric distance less than 3.0 kpc. Inspecting the velocity field defined by the sample, we found some 30 clusters that have extremely large peculiar motions. All the clusters with large peculiar velocities are distant objects further than 2 kpc from the Sun, and some of them have large Galactic height |z|>0.35 kpc. The age ranges of the clusters are from 4 Myr to 1 Gyr with the intermediate age of 50 Myr.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Supported by the National Natural Science Foundation of China (Grant 10333050).