Star Formation and Dissipation in Galactic Discs

  • C. J. Clarke
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 162)


Disc galaxy evolution models may be classified according to the relative importance of star formation and dissipation in the disc gas. We discuss how the observed distribution of stars and of metals in galactic discs may be used to assess the degree of dissipation in the gas. We show that in order for viscously induced radial flows to have been important in the evolution of disc galaxies the timescale for the gas to dissipate its energy associated with local random motions must be ~ 107 years. Possible sources of dissipation in the disc gas are briefly discussed.


Angular Momentum Star Formation Radial Flow Galactic Disc Disc Galaxy 
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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • C. J. Clarke
    • 1
  1. 1.Institute of AstronomyCambridgeUK

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