Montag, 11. April 2011 - 11:20
"Two problems with galaxy clusters"
Zusammenfassung. 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.