期刊
ASTRONOMY & ASTROPHYSICS
卷 435, 期 2, 页码 L25-L28出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:200500107
关键词
galaxies : clusters : general; galaxies : abundances; galaxies : interactions; galaxies : ISM; X-ray : galaxies : clusters
We present numerical simulations of galaxy clusters which include interaction processes between the galaxies and h 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 si 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.
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