Clusters, superclusters, and large-scale structure: A consistent picture

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Observations of the large-scale structure in the universe using different tracers and techniques, including the spatial distribution of galaxies, clusters of galaxies, narrow pencil-beam surveys, and quasars, appear to be yielding a consistent picture of the universal structure. A network of large-scale superclusters with scales up to ≈150h-1 Mpc is suggested (where h ≈ 0.5-1 is the Hubble constant in units of 100 km·s-1·Mpc-1; 1 pc = 3.09 × 1016 m; h = 1 is used throughout this paper). The supercluster network surrounds low-density regions, suggesting a "cellular" structure of the universe. The universal dimensionless cluster correlation function, supported by new data from automated cluster surveys, is consistent with this picture. The "standard" Ω = 1 cold dark matter (CDM) model for the universe appears to be inconsistent with the details of the observed large-scale structure distribution; a low-density, Ω ≈ 0.2-0.3, CDM model provides a considerably better fit to the observations.

Original languageEnglish (US)
Pages (from-to)4848-4852
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number11
StatePublished - Jun 1 1993

All Science Journal Classification (ASJC) codes

  • General


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