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.