The XMM-Newton $\Omega$ Project
Abstract
The abundance of high-redshift galaxy clusters depends sensitively on the matter density and, to a lesser extent, on the cosmological constant . Measurements of this abundance therefore constrain these fundamental cosmological parameters, and in a manner independent and complementary to other methods, such as observations of the cosmic microwave background and distance measurements. Cluster abundance is best measured by the X-ray temperature function, as opposed to luminosity, because temperature and mass are tightly correlated, as demonstrated by numerical simulations. Taking advantage of the sensitivity of XMM-Newton, our Guaranteed Time program aims at measuring the temperature of the highest redshift (z>0.4) SHARC clusters, with the ultimate goal of constraining both and .
Cite
@article{arxiv.astro-ph/0106098,
title = {The XMM-Newton $\Omega$ Project},
author = {J. G. Bartlett and N. Aghanim and M. Arnaud and J. -Ph. Bernard and A. Blanchard and M. Boer and D. J. Burke and C. A. Collins and M. Giard and D. H. Lumb and S. Majerowicz and Ph. Marty and D. Neumann and J. Nevalainen and R. C. Nichol and C. Pichon and A. K. Romer and R. Sadat and C. Adami},
journal= {arXiv preprint arXiv:astro-ph/0106098},
year = {2007}
}
Comments
To appear in the Proceedings of the XXI Moriond Conference: Galaxy Clusters and the High Redshift Universe Observed in X-rays, edited by D. Neumann, F. Durret, & J. Tran Thanh Van