We determine the shape, multiplicity, size, and radial structure of superclusters in the ACDM concordance cosmology from z = 0 to z = 2. Superclusters are defined as clusters of clusters in our large-scale cosmological simulation. We find that superclusters are triaxial in shape; many have flattened since early times to become nearly two-dimensional structures at present, with a small fraction of filamentary systems. The size and multiplicity functions are presented at different redshifts. Supercluster sizes extend to scales of ∼ 100-200 h-1 Mpc. The supercluster multiplicity (richness) increases linearly with supercluster size. The density profile in superclusters is approximately isothermal (∼A-2) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with up-coming observations of large-scale surveys.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
- Cosmology: theory
- Galaxies: clusters: general
- Large-scale structure of universe