Structure of superclusters and supercluster formation

Distances have been derived for Zwicky 'near' clusters of galaxies, located at 9 < RA < 15 and Dec. >-3, by using Huchra's compilation of galaxy redshifts, original redshift observations and photometric distance indicators. To study the spatial distribution clustering analysis has been applied. The Coma-A1367 Supercluster consists of four cluster chains; its diameter exceeds 100 Mpc. A typical cluster chain contains eight Zwicky clusters and is 80 Mpc long. The vast majority of clusters, if not all, form connected systems. Empty regions void of clusters have, in this region of the sky, diameters up to 100 Mpc. (author)