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From Spitzer to MaDCoWS: Galaxy Clusters During the Era of Cluster Formation

by Anthony Gonzalez (University of Florida, US)

May 13, 2014 from 02:00 PM to 03:30 PM

Where Seminars' room, floor -1, via Ranzani 1

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Galaxy clusters have long served as powerful probes of both cosmology and galaxy evolution, providing insights into the role of environment on galaxy evolution, evidence for dark matter, and constraints on the dark matter and dark energy content of the universe. The high-redshift frontier of galaxy cluster studies now lies at the era of cluster formation, during which the first massive galaxy clusters assemble. It is in this era that the present day star-formation density relation is established, and during which properties of the galaxy cluster population are strongly sensitive to cosmology. In this talk I will present results from high-redshift cluster searches with the Spitzer and WISE telescopes, which are helping to open up this redshift window for detailed study of the cluster galaxy population. I will show that by z=1.5 we are finally witnessing significant galaxy assembly and in situ star formation. Additionally, I will demonstrate how these programs are pushing the extremes in redshift and mass for detection of galaxy clusters, and discuss potential cosmological implications.

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