Suzaku X-ray and optical analysis of A426, A1800, A1831 ve A2572 galaxy clusters, the larges organized structures in the universe

Clusters of galaxies are the largest gravitational aggregates of theuniverse. They are formed by gravitational collapse of galaxies and smallergroups around a massive cD galaxy. Considering their size and dynamics, theyare the best cosmic laboratories to study universe. Total mass (baryonic + darkmatter) estimations, morphological variations, origin of chemical abundancesare some of the puzzling questions of the cosmos. Dark matter is one of thegreatest mysteries, since we do not know its nature and distribution. Althoughlarge scale structures are formed in clusters, baryonic matter to dark matterratio is assumed to be reasonably conserved in clusters of galaxies. In order tostudy the nature of light emitting matter, morphological properties of the hotplasma, temperature and metal distributions, we have selected 4 clusters ofgalaxies in this thesis. Our main aim is to try to improve our perception aboutthe above mentioned cosmological problems. Due to its high energy resolution,Suzaku X-ray data is used. Since we want to concentrate the main clusterproperties, we have selected regular clusters. Optical observations areperformed with RTT150 telescope. The results obtained from optical and Xraydata are as follows; i) All clusters have a cooling flow at the center, ii) Themember galaxies are dominated by SN Type Ia explosion, iii) All clusterspossess a centrally dominant (cD) galaxy, iv) They are all very bright in opticalband.