Volume 435, Number 2, May IV 2005
|Page(s)||L25 - L28|
|Published online||29 April 2005|
Letter to the Editor
Metal enrichment processes in the intra-cluster medium
Institut für Astrophysik, Leopold-Franzens Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria http://astro.uibk.ac.at/astroneu/hydroskiteam/index.htm e-mail: email@example.com
2 School of Mathematics, University of Edinburgh, Edinburgh EH9 3JZ, Scotland, UK
3 Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, 1180 Vienna, Austria
Accepted: 6 April 2005
We present numerical simulations of galaxy clusters which include interaction processes between the galaxies and the intra-cluster gas. The considered interaction processes are galactic winds and ram-pressure stripping, which both transfer metal-enriched interstellar medium into the intra-cluster gas and hence increase its metallicity. We investigate the efficiency and time evolution of the interaction processes by simulated metallicity maps, which are directly comparable to those obtained from X-ray observations. We find that ram-pressure stripping is more efficient than quiet (i.e. non-starburst driven) galactic winds in the redshift interval between 1 and 0. The expelled metals are not mixed immediately with the intra-cluster gas, but inhomogeneities are visible in the metallicity maps. Even stripes of higher metallicity that a single galaxy has left behind can be seen. The spatial distribution of the metals transported by ram-pressure stripping and by galactic winds are very different for massive clusters: the former process yields a centrally concentrated metal distribution while the latter results in an extended metal distribution.
Key words: galaxies: clusters: general / galaxies: abundances / galaxies: interactions / galaxies: ISM / X-ray: galaxies: clusters
© ESO, 2005
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