On the Angular Correlation Function of SZ Clusters : Extracting cosmological information from a 2D catalog

Abstract

We discuss the angular correlation function of Sunyaev-Zel'dovich (SZ)-detected galaxy clusters as a cosmological probe. As a projection of the real-space cluster correlation function, the angular function samples the underlying SZ catalog redshift distribution. It offers a way to study cosmology and cluster evolution directly with the two-dimensional catalog, even before extensive follow-up observations, thereby facilitating the immediate scientific return from SZ surveys. As a simple illustration of the information content of the angular function, we examine its dependence on the parameter pair Om_m, sigma_8 in flat cosmologies. We discuss sources of modeling uncertainty and consider application to the future Planck SZ catalog, showing how these two parameters and the normalization of the SZ flux-mass relation can be simultaneously found when the local X-ray cluster abundance constraint is included.

11 pages, 5 figures. A&A, 410, 767; corrected typo, published version

References in corpus (1)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters

Cited by in corpus (9)

• Measuring cluster peculiar velocities with the Sunyaev-Zeldovich effects: scaling relations and systematics
• Power spectrum and correlation function errors: Poisson vs. Gaussian shot noise
• Cluster abundances and S-Z power spectra: effects of non-Gaussianity and early dark energy
• Constraints on the Energy Content of the Universe from a Combination of Galaxy Cluster Observables
• Impact of Systematic Errors in Sunyaev-Zel'dovich Surveys of Galaxy Clusters
• Issues in joint SZ and optical cluster finding
• Impact of a non-Gaussian density field on Sunyaev-Zeldovich observables
• Uncertainties in the S-Z selected cluster angular power spectrum
• Cosmological constraints from a 2D SZ catalog