Using Galaxy Cluster Peculiar Velocities to Constrain Cosmological Parameters
Astrophysics
2009-11-07 v1
Abstract
Galaxy cluster peculiar velocities can be inferred from high-sensitivity, high-resolution multiple-frequency observations in the 30 to 400 GHz range. While galaxy cluster counts and power spectra are sensitive to the growth factor, peculiar velocities are sensitive to the time-derivative of the growth factor and are hence complementary. Using linear perturbation theory, we forecast constraints on Omega(matter), the Hubble constant today, and the dark-energy equation of state parameter, given 820 densely sampled cluster locations (near redshift 1) from a Lambda-CDM N-body simulation and 820 sparsely sampled cluster locations in a broader redshift range.
Cite
@article{arxiv.astro-ph/0205438,
title = {Using Galaxy Cluster Peculiar Velocities to Constrain Cosmological Parameters},
author = {A. Peel and L. Knox},
journal= {arXiv preprint arXiv:astro-ph/0205438},
year = {2009}
}
Comments
4 pages, 2 figures, to appear in Proceedings of Dark Matter 2002, requires espcrc2.sty