Title:

Galaxy Cluster Structure and Cosmology



Joe Mohr
University of Illinois



Abstract:

The near infrared, radio and X-ray properties of galaxy clusters
provide important insights into the evolution of galaxies within
clusters and the use of clusters to precisely study cosmology.
In principle, galaxy cluster surveys are enormously powerful
tools for determining the nature of the dark energy and
delivering a precise measurement of the expansion history of the
universe.  Large scale efforts at mm-wave, X-ray, optical and
near infrared wavelengths are underway to employ this tool.
However, there are significant challenges or astrophysical
systematics facing upcoming galaxy cluster studies of the dark
energy.  These include developing a precise understanding of the
survey selection and controlling cluster mass uncertainties.
New techniques are being developed to meet these challenges.