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Self-Regulated Star-Formation in Galaxies

  • J. Köppen
  • CH. Theis
  • G. Hensler
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)

Abstract

In the chemodynamical models of galaxies the energy input from massive stars into the ambient medium results in a self-regulation of the star formation rate (SFR). A thorough analytical and numerical study of this model shows that there is always a strong and negative feed-back, and the SFR becomes almost independent of the assumed stellar birth function (SBF). The time-scale to reach this equilibrium is much shorter than the gas consumption time-scale, hence the models evolve along this solution for most of the time. This mechanism provides a physical explanation for a quadratic dependence of the SFR on gas density. For more details cf. Köppen et al. (1995), A&A 296, 99 and in preparation.

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • J. Köppen
    • 1
  • CH. Theis
    • 1
  • G. Hensler
    • 1
  1. 1.Institut für Astronomie und AstrophysikUniversität KielGermany

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