A combined X-ray and SZ study of the growth of cosmic structure

Computer Science

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Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Spt-Clj0205-582, Spt-Clj2040-572, Spt-Clj2137-630, Spt-Clj0230-602, Spt-Clj0406-545, Spt-Clj0232-581, Spt-Clj0344-545, Spt-Clj0511-515, Spt-Clj2057-550

Scientific paper

We propose to study the growth of cosmic structure by completing X-ray observations of the 20 z>0.7 clusters discovered in the first 600d of the SPT cluster survey. This proposal requests 545 ksec for 9 clusters with measured redshifts 0.73x10^14 M_sun. These observations are a critical part of a multi-wavelength campaign to calibrate SZE selected cluster masses using X-ray, weak lensing and velocity dispersions. In addition, the X-ray observations will directly constrain properties of clusters at z~1, including the metallicity of the ICM, the cool core fraction, and the deviations from self-similar evolution at high redshift. When combined with WMAP 7-year results and the SPT survey, the X-ray mass calibration will allow a 6% constraint on w, the dark energy equation of state parameter.

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