Temperature Map of Clusters in Core Region of Shapley Supercluster
F. Akimoto1,2, K. Kondaou1, A. Furuzawa1, K. Yamashita1 and Y. Tawara1
1: Department of Physics, Nagoya University
2: Research Center for Advanced Energy Conversion, Nagoya University
Abstract
Shapley supercluster appears to be a high-concentration region
involving 25 Abell clusters of galaxies within a radius of 50
h50-1 Mpc. The central core is dominated by three Abell
clusters and two poor clusters.
Since the member clusters seems to be evolving rapidly in comparison
to non-member clusters due to high merging rate, the study of
the member clusters is important to understand cluster
evolution. Furthermore, since a spatial distribution of gas
temperature in each member cluster provides us informations of
interactions and motions of member clusters, it is useful for
understanding their dynamics.
We present results of ASCA eight pointing observations (totally
about 300 ksec) of the core region. Obtained parameters of averaged
gas temperature, abundance and X-ray luminosity for each members were
found to be similar to the non-member clusters observed with
ASCA. It means that the members are growing in the same way with the
non-member clusters.
The obtained spatial distribution of gas temperature in three Abell
clusters in the core of the supercluster shows a asymmetric
distribution. It seems to be due to a cluster-cluster merging or
a group infalling. On the other hand, the two poor clusters show an
isotropic temperature distribution.
We will discuss the dynamics of the member clusters in the
supercluster with the temperature map, galaxy density, velocity map.