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Monday, April 11, 2011 - 11:20am
"Two problems with galaxy clusters"
Abstract. Galaxy clusters seem to be well understood, individually and as a population, but their gravitational lensing effects reveal problems that are hard to tackle. As strong lenses, they seem to be substantially more efficient than they should be according to standard simulations. I shall summarise the evidence for the problems and sketch what we hope will a way towards their solution.
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