Future virialized structures: An analysis of superstructures in SDSS-DR7

Abstract

We construct catalogues of present superstructures that, according to a LCDM scenario, will evolve into isolated, virialized structures in the future. We use a smoothed luminosity density map derived from galaxies in SDSS-DR7 data and separate high luminosity density peaks. The luminosity density map is obtained from a volume-limited sample of galaxies in the spectroscopic galaxy catalogue, within the SDSS-DR7 footprint area and in the redshift range 0.04 < z < 0.12. Other two samples are constructed for calibration and testing purposes, up to z = 0.10 and z = 0.15. The luminosity of each galaxy is spread using an Epanechnikov kernel of 8Mpc/h radius, and the map is constructed on a 1 Mpc/h cubic cells grid. Future virialized structures (FVS) are identified as regions with overdensity above a given threshold, calibrated using a LCDM numerical simulation, and the criteria presented by Dünner et al. (2006). We assume a constant mass-to-luminosity ratio and impose the further condition of a minimum luminosity of 10^{12}Lsol. According to our calibrations with a numerical simulation, these criteria lead to a negligible contamination by less overdense (non FVS) superstructures.We present a catalogue of superstructures in the SDSS-DR7 area within redshift 0.04 < z < 0.12 and test the reliability of our method by studying different subsamples as well as a mock catalogue.We compute the luminosity and volume distributions of the superstructures finding that about 10% of the luminosity (mass) will end up in future virialized structures. The fraction of groups and X-ray clusters in these superstructures is higher for groups/clusters of higher mass, suggesting that future cluster mergers will involve the most massive systems. We also analyse known structures in the present Universe and compare with our catalogue of FVS.

14 pages, 11 figures, modified to match accepted version in MNRAS. PDF with high resolution colour figures is available at http://www.oac.uncor.edu/apache2-default/adminweb/html/WEB/preprints/2011.01/FVS-DR7.pdf

References in corpus (17)

• The flip-side of galaxy formation: A combined model of Galaxy Formation and Cluster Heating
• The L_X--M relation of Clusters of Galaxies
• Superclusters of galaxies from the 2dF redshift survey. I. The catalogue
• Alignments of Voids in the Cosmic Web
• Superclusters of galaxies from the 2dF redshift survey. II. Comparison with simulations
• The Limits of Bound Structures in the Accelerating Universe
• Luminous superclusters: remnants from inflation
• The nature of assembly bias - I. Clues from a LCDM cosmology
• Morphological Properties of Superclusters of Galaxies
• The Sloan Great Wall. Rich clusters
• The influence of halo assembly on galaxies and galaxy groups
• The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology
• Connected structure in the 2dFGRS
• Redshift-space limits of bound structures
• Void-Supercluster Alignments
• Detailed Study of the Ursa Major Supercluster of Galaxies Using the 2MASS and SDSS Catalogs
• The richest superclusters. I. Morphology

Cited by in corpus (37)

• A structure in the early universe at z ~ 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology
• SDSS DR7 superclusters. The catalogues
• The Challenge of the Largest Structures in the Universe to Cosmology
• SDSS superclusters: morphology and galaxy content
• How unusual are the Shapley Supercluster and the Sloan Great Wall?
• Two New Catalogues of Superclusters of Abell/ACO Galaxy Clusters out to redshift 0.15
• Sloan Great Wall as a complex of superclusters with collapsing cores
• Multiscale cosmic web detachments, connectivity, and preprocessing in the supercluster SClA2142 cocoon
• Unusual A2142 supercluster with a collapsing core: distribution of light and mass
• Characterising superclusters with the galaxy cluster distribution
• Identification of filamentary structures in the environment of superclusters of galaxies in the Local Universe
• Brightest group galaxies and the large-scale environment
• Effects of superstructure environment on galaxy groups
• SDSS DR7 superclusters. Principal component analysis
• Evolution of superclusters in the cosmic web
• The Corona Borealis supercluster: connectivity, collapse, and evolution
• Tracing high redshift cosmic web with quasar systems
• Characteristic density contrasts in the evolution of superclusters. The case of A2142 supercluster
• Hierarchical Clustering in Astronomy
• How do galaxies populate halos in extreme density environments? An analysis of the Halo Occupation Distribution in SDSS
• Stellar populations in superclusters of galaxies
• The Cosmic Large-Scale Structure in X-rays (CLASSIX) cluster survey IV: Superclusters in the local Universe at z <= 0.03
• The evolution of high-density cores of the BOSS Great Wall superclusters
• BOSS Great Wall: morphology, luminosity, and mass
• Voids and Superstructures: correlations and induced large-scale velocity flows
• Dissecting a miniature universe: A multi-wavelength view of galaxy quenching in the Shapley supercluster
• Evolution of superclusters and supercluster cocoons in various cosmologies
• Galaxy populations in haloes in high-density environments
• Quasi-spherical superclusters
• Nucleation regions in the Large-Scale Structure I. A catalogue of cores in nearby rich superclusters
• The extent of gravitationally bound structure in a ΛCDM universe
• Galaxy Superclusters and Their Complexes in the Cosmic Web
• Does the Corona Borealis Supercluster form a giant binary-like system?
• The influence of superstructures on bright galaxy environments: clustering properties
• Galaxy structures - Groups, clusters and superclusters
• Spatial correlations of extended cosmological structures
• The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029