Distances and Cosmology From Galaxy Cluster CMB Data

Abstract

The measurement of angular diameter distance to galaxy clusters, through combined Sunyaev-Zel'dovich (SZ) effect data with X-ray emission observations, is now a well-known probe of cosmology. Using a combination of SZ data and a map of the lensed CMB anisotropies by the galaxy cluster potential, we propose an alternative geometric technique to measure distance information primarily through cluster related multi-frequency CMB measurements. We discuss necessary requirements to implement this measurement, potential errors including systematic biases, and the extent to which cosmological parameters can be extracted. While individual cluster distances are not likely to be precise, with upcoming subarcminute resolution wide-area CMB observations, useful information on certain cosmological parameters, such as the equation of state of dark energy, can be obtained from a large sample of galaxy clusters.

4 pages, 2 figures

References in corpus (6)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Universal gas density and temperature profile
• Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zel'dovich Effect
• Coherent Phase Argument for Inflation
• Kinetic Sunyaev-Zel'dovich effect from halo rotation
• Cluster Sunyaev-Zeldovich Effect Scaling Relations

Cited by in corpus (2)

• Gravitational Lensing of the Microwave Background by Galaxy Clusters
• CMB Cluster Lensing: Cosmography with the Longest Lever Arm