Standard model of cosmology supported by galaxy clusters.

Physicists at the Department of Energy's SLAC National Accelerator Laboratory and Stanford University have found new evidence for the standard model of cosmology by making detailed measurements of the X-ray emission from galaxy clusters, which revealed the distribution of matter within them. The data helped the scientists test the prevailing theory of the structure and evolution of the universe, known as Lambda-CDM. The team found consistent results from both data sets: Overall, clusters have become more centrally concentrated over time, while at any given time, less massive clusters are more centrally concentrated than more massive ones.