The Evolution of the Milky Way

A self-consistent chemodynamical model
  • Gerhard Hensler
Conference paper

Abstract

A two-dimensional chemodynamical model of the Milky Way Galaxy is presented that can account for the structural, kinematical, and chemical pecularities of the galactic components in a self-consistent way. The dynamics of three stellar components and the multi-phase interstellar medium consisting of clouds and intercloud gas are followed in detail. Mass interchange and energetic interaction processes between the stars and the gas phases are treated simultaneously according to the astrophysical experience including star formation, supernovae type I and II, planetary nebulae, stellar winds, evaporation and condensation, drag, cloud collisions, heating and cooling, and stellar nucleosynthesis. These processes are coupling large ranges on temporal and spatial scales, and allow for feedback and self-regulation mechanisms, which play a significant role in galactic evolution. In comparison with observations the capability of the chemodynamical treatment is convincingly proved by the excellent agreement with various observations. In addition, also well-known problems (G-dwarf problem, the discrepancy between local effective yields, etc.), which so far could be only explained by artificial constraints, are solved in the global scenario. Here we wish also to focus on temporal behaviours of the radial abundance gradient and abundance ratios in order to stimulate further more specific observations and to make particular predictions which can test the validity of used model ingredients like stellar yields.

Keywords

Star Formation Star Formation Rate Disk Galaxy Oxygen Abundance Galaxy Evolution 
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 Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Gerhard Hensler
    • 1
  1. 1.Institut für Theoretische Physik und Astrophysik, Universität KielKielGermany

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