Distribution of substructures in clusters of galaxies
Abstract:Wavelet analysis has been applied to the positional data of galaxies in the 117 Abell clusters. The calculations used allowed us to obtain coordinates of the centres substructures detected and to estimate the number of galaxies belonging to them. This study has shown that substructures are present in 45 clusters. Moreover, the analysis of the distribution of substructures within clusters shows that small substructures have a higher projected density than large substructures do and, for each applied wavelet scale a, the number of substructures increases towards the cluster centre.
Document Type: Research Article
Publication date: December 1, 2003