X-ray clusters of galaxies as tracers of structure in the Universe

Stefano Borgani () and Luigi Guzzo
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Stefano Borgani: INFN, Sezione di Trieste
Luigi Guzzo: Osservatorio Astronomico di Brera

Nature, 2001, vol. 409, issue 6816, 39-45

Abstract: Abstract Clusters of galaxies are visible tracers of the network of matter in the Universe, marking the high-density regions where filaments of dark matter join together. When observed at X-ray wavelengths these clusters shine like cosmic lighthouses, as a consequence of the hot gas trapped within their gravitational potential wells. The X-ray emission is linked directly to the total mass of a cluster, and so can be used to investigate the mass distribution for a sizeable fraction of the Universe. The picture that has emerged from recent studies is remarkably consistent with the predictions for a low-density Universe dominated by cold dark matter.

Date: 2001
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DOI: 10.1038/35051000

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