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Age-Dependence and Distribution of the Velocities of Disk Stars and Implications of a Possible Disruption of Globular Clusters by Massive Black Holes

  • R. Wielen
  • B. Fuchs

Abstract

The systematic increase in the dispersions of the peculiar velocities of disk stars as function of age provides the best direct observational evidence for a dynamical evolution of galalactic disks. This age-velocity-dispersion relation is particularly well observed for stars in the solar neighbourhood (Wielen 1974, 1977, 1982). To the increase of the velocity component W perpendicular to the galactic plane corresponds an increase of the vertical scale height of the disk stars as function of age. This age-thickness relation is well known for our Galaxy, and is also observed in external edge-on galaxies.

Keywords

Black Hole Dark Matter Globular Cluster Massive Black Hole Galactic Disk 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • R. Wielen
    • 1
  • B. Fuchs
    • 1
  1. 1.Astronomisches Rechen-InstitutHeidelbergFed. Rep. of Germany

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