Andreas Kull

IfA

X-ray Emission of Clusters of Galaxies


The X-ray emission of clusters of galaxies gives insight
into the structure of clusters as well as it traces the
peaks of the large scale distribution of matter in the Universe.

In the first part of my talk I will discuss the statistical
mechanical description of collisionless relaxation processes
and its application to mixed dark matter models and clusters
of galaxies. A simple self-consistent model of clusters of
galaxies is presented and its predicted X-ray emission is
compared to ROSAT observations.

Preliminary results from the study of ROSAT All-Sky Survey data
covering the Shapley region will be discussed in the second
part of the talk. The Shapley supercluster is one of the densest
large scale concentrations of matter in the local Universe
($z<0.1$). I will present evidence for elongated, faint X-ray
emission in the vicinity of the clusters of galaxies A3562,
A3558 and A3556 spanning $\sim 17 h_{50}^{-1}$ Mpc.