Astron. Astrophys. 348, 371-380 (1999)

Chemo-dynamical smoothed particle hydrodynamic code for evolution of star forming disk galaxies

Peter Berczik

Main Astronomical Observatory of Ukrainian National Academy of Sciences, 252650, Golosiiv, Kiev-022, Ukraine (berczik@mao.kiev.ua)

Received 16 February 1999 / Accepted 30 April 1999

Abstract

A new Chemo-Dynamical Smoothed Particle Hydrodynamic (CD-SPH) code is presented. The disk galaxy is described as a multi-fragmented gas and star system, embedded in a cold dark matter halo with a rigid potential field. The star formation (SF) process, SNII, SNIa and PN events, and the chemical enrichment of gas, have all been considered within the framework of the standard SPH model, which we use to describe the dynamical and chemical evolution of triaxial disk-like galaxies. It is found that such approach provides a realistic description of the process of formation, chemical and dynamical evolution of disk galaxies over a cosmological timescale.

Key words: methods: numerical galaxies: evolution galaxies: kinematics and dynamics

Send offprint requests to: Peter Berczik

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Contents

• 1. Introduction
• 2. The CD-SPH code
  • 2.1. The SPH code
  • 2.2. Time integration
  • 2.3. The star formation algorithm
  • 2.4. The thermal SNII feed-back
  • 2.5. The chemical enrichment of gas
  • 2.6. The cold dark matter halo
• 3. Results and discussion
  • 3.1. Initial conditions
  • 3.2. Dynamical model
  • 3.3. Chemical characteristics
  • 3.4. Conclusion
• Acknowledgements
• References

© European Southern Observatory (ESO) 1999

Online publication: July 26, 1999
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