The Role of Intracluster Stars in the Enrichment of the Intracluster Medium

Details The Role of Intracluster Stars in the Enrichment of the Intracluster Medium The Role of Intracluster Stars in the Enrichment of the Intracluster Medium

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..158s&link_type=abstract

XMM-Newton Proposal ID #05041601

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Abell 0122, Xmm-Newton Proposal 05041601

Scientific paper

How does the intracluster medium (ICM) become enriched with metals? A popular idea is that outflows from cluster galaxies are the source, but these models require non-standard top-heavy IMFs and unphysically high mass loss rates (close to 100%). As a result, galaxies are unlikely to be the sole source of metals. We recently identified a significant population of intracluster stars (ICS) in all of the nearby clusters and groups we surveyed. With simple modeling, standard assumptions, and XMM and optical data, we find that intracluster stars can produce a significant amount of metals in the central regions of clusters, primarily because they pollute the ICM directly. Here we propose to disentangle the contribution of galactic outflows from that of intracluster stars in lower velocity dispersion systems.

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