Uncertainties in the S-Z selected cluster angular power spectrum

Abstract

Large SZ selected galaxy cluster surveys are beginning imminently. We compare the dependence of the galaxy cluster angular power spectrum on cosmological parameters, different modeling assumptions and statistical observational errors. We quantify the degeneracies between theoretical assumptions such as the mass function and cosmological parameters such as ${\sigma }_8$. We also identify a rough scaling behavior of this angular power spectrum with ${\sigma }_8$ alone.

Final version to appear in ApJ. Expanded the discussion on the degeneracy of sigma_8 and Omega_m

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• Numerical Simulations of Torsional Alfvén Waves in Axisymmetric Solar Magnetic Flux Tubes