The Omega_M-Omega_Lambda Constraint from CNOC Clusters
Astrophysics
2007-05-23 v1
Abstract
The CNOC redshift survey of galaxy clusters measures Omega_M from Omega_e(z)= M/L x j/\rho_c which can be applied on a cluster-by-cluster basis. The mass-to-light ratios, M/L, are estimated from rich galaxy clusters, corrected to the field population over the 0.18 to 0.55 redshift range. Since the luminosity density depends on cosmological volumes, the resulting Omega_e(z) has a strong dependence on cosmology which allows us to place the results in the Omega_M-Omega_Lambda plane. The resulting Omega_M declines if Omega_Lambda>0 and we find that Omega_Lambda<1.5.
Cite
@article{arxiv.astro-ph/9804312,
title = {The Omega_M-Omega_Lambda Constraint from CNOC Clusters},
author = {R. G. Carlberg and H. K. C. Yee and E. Ellingson and S. L. Morris and H. Lin and M. Sawicki and D. Patton and G. Wirth and R. Abraham and P. Gravel and C. J. Pritchet and T. Smecker-Hane and D. Schade and F. D. A. Hartwick and J. E. Hesser and J. B. Hutchings and J. B. Oke},
journal= {arXiv preprint arXiv:astro-ph/9804312},
year = {2007}
}
Comments
4 pages LaTeX. To appear in "Fundamental Parameters in Cosmology," the proceedings of the XXXIIIrd Rencontres de Moriond