Galaxy Clusters as Probes for Matter in the Universe

Details Galaxy Clusters as Probes for Matter in the Universe Galaxy Clusters as Probes for Matter in the Universe

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ssrv..100...49b&link_type=abstract

Space Science Reviews, v. 100, Issue 1/4, p. 49-60 (2002).

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Scientific paper

Galaxy clusters are ideal tracers of the large-scale structure and evolution of the universe. They are thus good probes for the matter content of the universe, the existence of dark matter, and for the statistics of the large-scale structure of the matter distribution. X-ray observations provide a very effective tool to characterize individual galaxy clusters as well as the cluster population. With the detailed analysis of X-ray observations of galaxy clusters the matter composition of clusters is obtained which can be taken as representative of the matter composition of the universe. Based on galaxy cluster surveys in X-rays a census of the galaxy cluster population and statistical measures of the spatial distribution of clusters is obtained. Comparison of the results with predictions from cosmological models yields interesting cosmological model constraints and in particular favours a low density universe.

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