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Related Experiment Videos

Clusters, superclusters, and large-scale structure: a consistent picture.

N A Bahcall1

  • 1Astrophysical Sciences, Princeton University, Princeton, NJ 08544-1001, USA.

Proceedings of the National Academy of Sciences of the United States of America
|June 1, 1993
PubMed
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Cosmic observations reveal a "cellular" universe structure with superclusters and voids. A low-density cold dark matter model better explains this large-scale structure than the standard Omega = 1 model.

Area of Science:

  • Cosmology
  • Astrophysics
  • Large-Scale Structure

Background:

  • Universe exhibits large-scale structure formation.
  • Previous models struggled to reconcile observations.

Purpose of the Study:

  • To analyze large-scale cosmic structure using diverse tracers.
  • To evaluate consistency with cosmological models.

Main Methods:

  • Spatial distribution analysis of galaxies, clusters, and quasars.
  • Utilizing narrow pencil-beam surveys and automated cluster surveys.
  • Calculating the universal dimensionless cluster correlation function.

Main Results:

  • Consistent picture of universal structure emerging.

Related Experiment Videos

  • Evidence for a "cellular" universe with superclusters and low-density regions.
  • Standard Omega = 1 cold dark matter (CDM) model is inconsistent with observations.

    • Conclusions:

    • A low-density CDM model (Omega ≈ 0.2–0.3) provides a better fit.
    • Observed large-scale structure challenges standard cosmological models.