Clusters of Galaxies as Cosmic Laboratories

Session

X-ray Surveys and Cosmology

13 Sept 2011, 09:00

FD51 (AlbaNova main building)

260. Constraining dark energy and modified gravity with galaxy clusters

David Rapetti

13/09/2011, 09:00

Talk

Using measurements of the abundance of galaxy clusters we obtain constraints on dark energy and gravity at cosmological scales. Our data set consists of 238 cluster detections drawn from the ROSAT All-Sky Survey and X-ray follow-up observations of 94 of those clusters. Using a new statistical framework we self-consistently and simultaneously constrain cosmology and...

254. The XMM Cluster Survey: First Data Release and Initial Science Results

Kathy Romer

13/09/2011, 09:45

Talk

I will review the properties of the 504 clusters in the XCS-DR1 and, time allowing, explain some of the technical challenges that we have met whilst developing that catalog. I will then present science results based on the XCS-DR1 clusters, including those on Fossil Groups; AGN-ICM interactions; optical-to-X-ray scaling relations and the luminosity-to-temperature relation. I will preview...

257. Cosmology with the XMM clusters

Nicolas Clerc

13/09/2011, 11:00

Talk

I will describe the CR-HR method jointly taking into account ICM properties and cosmological parameters with minimal assumptions and show how this method can be applied to the analysis of large cosmological X-ray surveys. I will then present the results we obtained from a large, serendipitous cluster survey, X-CLASS.

255. The XMM Cluster Survey: Future constraints

Martin Sahlen

13/09/2011, 11:45

Talk

I will discuss expected future cosmological constraints from the utilization of the XMM Cluster Survey sample.