Quasi-spherical superclusters

Understand

Generally the dynamical state of superclusters is poorly known.

• We study properties of superclusters and select a sample of quasi-spherical superclusters, the dynamics of which can be studied using the $\Lambda$ significance diagram.
• We extracted our supercluster sample with an adaptive local threshold density method from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) data and estimated their masses using the dynamical masses for member galaxies and groups.
• We used topological analysis based on Minkowski functionals and the positions of galaxies and galaxy groups in superclusters.