Evolution of superclusters and supercluster cocoons in various cosmologies

Abstract

We investigate the evolution of superclusters and supercluster cocoons (basins of attraction), and the influence of cosmological parameters to the evolution. We perform numerical simulations of the evolution of the cosmic web for different cosmological models: the LCDM model with a conventional value of the dark energy (DE) density, the open model OCDM with no DE, the standard SCDM model with no DE, and the Hyper-DE HCDM model with an enhanced DE density value. We find ensembles of superclusters of these models for five evolutionary stages, corresponding to the present epoch z = 0, and to redshifts z = 1, 3, 10, 30. We use diameters of the largest superclusters and the number of superclusters as percolation functions to describe properties of the ensemble of superclusters in the cosmic web. We analyse the size and mass distribution of superclusters in models and in real Sloan Digital Sky Survey (SDSS) based samples. In all models numbers and volumes of supercluster cocoons are independent on cosmological epochs. Supercluster masses increase with time, and geometrical sizes in comoving coordinates decrease with time, for all models. LCDM, OCDM and HCDM models have almost similar percolation parameters. This suggests that the essential parameter, which defines the evolution of superclusters, is the matter density. The DE density influences the growth of the amplitude of density perturbations, and the growth of masses of superclusters, albeit significantly less strongly. The HCDM model has the largest speed of the growth of the amplitude of density fluctuations, and the largest growth of supercluster masses during the evolution. Geometrical diameters and numbers of HCDM superclusters at high threshold densities are larger than for LCDM and OCDM superclusters. SCDM model has about two times more superclusters than other models; SCDM superclusters have smaller diameters and masses.

14 pages, 10 figures (accepted by Astronomy & Astrophysics). arXiv admin note: text overlap with arXiv:1901.09378

References in corpus (11)

• Dark Energy and the Accelerating Universe
• Planck evidence for a closed Universe and a possible crisis for cosmology
• The Laniakea supercluster of galaxies
• Investigating Cosmic Discordance
• Superclusters of galaxies from the 2dF redshift survey. I. The catalogue
• The peculiar velocity field up to $z\sim 0.05$ by forward-modeling Cosmicflows-3 data
• Anatomy of luminosity functions: the 2dFGRS example
• The impact of the connectivity of the cosmic web on the physical properties of galaxies at its nodes
• Multiscale cosmic web detachments, connectivity, and preprocessing in the supercluster SClA2142 cocoon
• Evolution of superclusters in the cosmic web
• Segmenting the Universe into dynamically coherent basins

Cited by in corpus (9)

• Science objectives of the Einstein Probe mission
• Evolution of skewness and kurtosis of cosmic density fields
• Unveiling the internal structure of Hercules supercluster
• The Cosmic Large-Scale Structure in X-rays (CLASSIX) cluster survey IV: Superclusters in the local Universe at z <= 0.03
• The shape distribution of superclusters in SDSS DR 12
• King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z=0.55 using the Subaru Hyper Suprime-Cam
• Evolution of matter and galaxy clustering in cosmological hydrodynamical simulations
• Constraining the Hubble parameter with the 21 cm brightness temperature signal in a universe with inhomogeneities
• Tracing the high-z cosmic web with Quaia: catalogues of voids and clusters in the quasar distribution