Measuring the Growth of Structure with Spectroscopically Identified Groups and Clusters
Abstract
Number counts of galaxy clusters offer a very promising probe of the Dark Energy (DE) equation-of-state parameter, . The basic goal is to measure abundances of these objects as a function of redshift, compare this to a theoretical prediction, and infer the values of cosmological parameters. Various teams have proposed such a measurement, including the South Pole Telescope, the Dark Energy Survey and the Red-Sequence Cluster Survey. The specific study discussed here detects clusters and smaller galaxy groups in the three-dimensional distribution of galaxies inferred from a large spectroscopic redshift survey. This method allows the abundance, , of groups and clusters to be measured as a function of \emph{velocity dispersion}, as well as of redshift, permitting a more sensitive test of cosmology.
Cite
@article{arxiv.astro-ph/0507555,
title = {Measuring the Growth of Structure with Spectroscopically Identified Groups and Clusters},
author = {M. Davis and B. F. Gerke and A. L. Coil and M. C. Cooper and R. Yan and J. A. Newman and S. M. Faber and D. Koo and P. Guhathakurta},
journal= {arXiv preprint arXiv:astro-ph/0507555},
year = {2009}
}
Comments
10 pages, including 5 figures. White paper submitted to the Dark Energy Task Force Committee