Abstract
We investigate the impact of galactic mass loss triggered by ram-pressure stripping of cluster galaxies on the evolution of the intra-cluster medium (ICM). We use combined N-body and hydrodynamic simulations together with a phenomenological galaxy formation model and a prescription of the effect of ram-pressure stripping on the galaxies. We analyze the effect of galaxy -- ICM interaction for different model clusters with different masses and different merger histories. Our simulations show that ram-pressure stripping can account for ~ 10% of the overall observed level of enrichment in the ICM within a radius of 1.3 Mpc. The efficiency of metal ejection of cluster galaxies depends at the first few Gyr of the simulation mainly on the cluster mass and is significantly increased during major merger events. Additionally we show that ram-pressure stripping is most efficient in the center of the galaxy cluster and the level of enrichment drops quite fast at larger radii. We present emission weighted metallicity maps of the ICM which can be compared with X-ray observations. The resulting distribution of metals in the ICM shows a complex pattern with stripes and plumes of metal rich material. The metallicity maps can be used to trace the present and past interactions between the ICM and cluster galaxies.
Highlights
The presence of an embedding medium has an influence on the evolution of galaxies
We investigate the impact of galactic mass loss triggered by ram-pressure stripping of cluster galaxies on the evolution of the intracluster medium (ICM)
In the present paper we investigate the chemical enrichment of the ICM due to ram-pressure stripping of cluster galaxies from z = 1 to z = 0
Summary
The presence of an embedding medium has an influence on the evolution of galaxies. This effect will be most important in high density environments like those of galaxy clusters. Galaxies subject to ram-pressure stripping will lose part of their ISM which has been enriched with heavy elements by their stars This will have an impact on the chemical abundance of the surrounding intra-cluster medium (ICM). In this paper we investigate the impact of the enrichment of the ICM by ram-pressure stripping of cluster galaxies. Abadi et al 1999; Quilis et al 2000; Mori & Burkert 2000; Vollmer et al 2001; Toniazzo & Schindler 2001; and Roediger & Hensler 2005) In contrast to those papers we present simulations showing the impact of ram-pressure stripping of all cluster galaxies on the ICM. The galactic dark matter halo gravitation is treated without any spatial detail by applying the gravitational potential
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