Clusters of Galaxies in X-rays
Abstract
X-ray observations of clusters at different redshifts are presented and compared. For the nearest cluster -- the Virgo cluster -- we show a comparison of the galaxy distribution and the distribution of the intra-cluster gas. Although the Virgo cluster has such an irregular structure, it seems that within each of the subclusters some kind of equilibrium has already established. X-ray observations of distant lensing clusters reveal very different properties. The large range of X-ray properties without any obvious correlation between them shows that cluster evolution is complex, i.e. not every cluster is evolving in the same way. A comparison of nearby clusters and distant clusters shows that there is no clear trend with time in any of the X-ray properties, which favours a low-Omega universe.
Cite
@article{arxiv.astro-ph/9811470,
title = {Clusters of Galaxies in X-rays},
author = {S. Schindler},
journal= {arXiv preprint arXiv:astro-ph/9811470},
year = {2007}
}
Comments
Invited talk presented at the 3rd INTEGRAL workshop "The Extreme Universe" (Sept. 14-18, 1998, Taormina, Italy), 8 pages, 4 colour figures