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

Nature
S Borgani, L Guzzo

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.

Citations

Jun 14, 2003·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Richard Mushotzky

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