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 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..165s&link_type=abstract

XMM-Newton Proposal ID #04045203

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Abell 2811, Abell 3693, Abell 4010, Xmm-Newton Proposal 04045203

Scientific paper

How the intracluster medium (ICM) becomes enriched with metals is an important, yet unresolved, question. Conventional models, which hypothesize that cluster galaxies inject metals into the ICM via galactic winds and/or ram-pressure stripping, fall short unless they appeal either to extreme 100% mass loss or non-standard stellar initial mass functions to explain the ICM's high enrichment. In contrast, our new measurements of the intracluster stars (Gonzalez et al. 2004), when combined with simple modeling, suggests that they produce a large fraction of the ICM's metals (Zaritsky et al. 2005). Given the surprising nature of this result, in which at least some of the ICM's metals are produced in situ instead of being transported out of galaxies, it is essential to further test our model.

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