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ABSTRACT: We present numerical simulations of the dynamical and chemical evolution of galaxy clusters. X-ray spectra show that the intra-cluster medium contains a significant amount of metals. As heavy elements are produced in the stars of galaxies material from the galaxies must have been expelled to enrich the ambient medium. We have performed hydrodynamic simulations investigating various enrichment processes. In this presentation we show the feedback from gas which is stripped from galaxies by ram-pressure stripping. The efficiency, resulting spatial distribution of the metals and the time dependency of this enrichment process on galaxy cluster scale will be shown.
Advances in Space Research. 06/2004;
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ABSTRACT: We investigate efficiency and time dependence of metal enrichment processes in the intra-cluster medium (ICM). In this presentation, we concentrate on the effects of galactic winds. The mass loss rates due to galactic winds are calculated with a special algorithm, which takes into account cosmic rays and magnetic fields. This algorithm is embedded in a combined N-body/hydrodynamic code which calculates the dynamics and evolution of a galaxy cluster. We give metallicity maps, which show the metal distribution in the ICM caused by galactic winds of quiet, i.e., non-starburst, disk galaxies.
Advances in Space Research. 06/2004;
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ABSTRACT: We present first results of numerical simulations of the dynamics of all three components of a galaxy cluster: the dark matter, the intracluster gas, and the member galaxies. Our first aim is to understand the enrichment of the gas component by studying various interaction processes between cluster galaxies and the intracluster gas, notably ram-pressure stripping and galactic winds. Our second aim is to find out how fast metals originating from such interaction processes diffuse throughtout the cluster, in order to understand observed metallicity maps of galaxy clusters obtained from X-ray observations.
Proceedings of the International Astronomical Union 02/2004; 2004:285 - 289.
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Eelco van Kampen,
Wilfried Domainko,
Wolfgang Kapferer,
Stefan Kimeswenger,
Thomas Kronberger,
Magdalena Mair,
Rainer Moll,
Sabine Schindler,
Maximilian Ruffert,
Otonyo Mangete,
Chris Rimes
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ABSTRACT: The fate of gas in cluster galaxies through the dynamical processes of ram-pressure stripping and winds is modelled using a combined N-body, phenomenological and hydrodynamical approach. This allows us to model the interaction between cluster galaxies and the intra-cluster medium, and study the consequences of this interaction on the metallicity of the hot cluster gas as well as the properties of the cluster galaxies. We summarize our results for the ICM metallicity, and discuss a first attempt to improve the predictions for the properties of cluster galaxies.
New Astronomy Reviews 51:84-86. · 1.32 Impact Factor
