CfA Colloquium Schedule Spring 2009
 5 February 2009

5 February 2009

Speaker: Alexey Vikhlinin (SAO)

Title:The present and the future of growth of structures studies with galaxy clusters.

Abstract:I will present Chandra observations of ROSAT-selected galaxy clusters which allow us to reconstruct the evolution of the galaxy cluster mass function between z=0 and z=0.7. The statistical and systematic errors in this measurement are sufficiently small, so that we can now confidently observe how the growth of structure at redshift below 1 is suppressed by the effects of dark energy; we can also improve constraints on the dark energy equation of state and the mass of light neutrinos. I will also discuss strategies for improving the accuracy of the cluster mass function measurements so that they provide useful cosmological information in the JDEM era.

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