Does lower Omega allow a resolution of the large-scale structure problem

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165302· OSTI ID:6147431

Silk, J; Vittorio, N

The intermediate angular scale anisotropy of the cosmic microwave background, peculiar velocities, density correlations, and mass fluctuations for both neutrino and baryon-dominated universes with Omega less than one are evaluated. The large coherence length associated with a low-Omega, hot dark matter-dominated universe provides substantial density fluctuations on scales up to 100 Mpc: there is a range of acceptable models that are capable of producing large voids and superclusters of galaxies and the clustering of galaxy clusters, with Omega roughly 0.3, without violating any observational constraint. Low-Omega, cold dark matter-dominated cosmologies are also examined. All of these models may be reconciled with the inflationary requirement of a flat universe by introducing a cosmological constant 1-Omega. 68 references.

• Research Organization: California Univ., Berkeley
• OSTI ID: 6147431
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 317; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BARYONS
COSMOLOGICAL MODELS
COSMOLOGY
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
GALACTIC EVOLUTION
GALAXY CLUSTERS
HADRONS
LEPTONS
MASS DISTRIBUTION
MASSLESS PARTICLES
MATHEMATICAL MODELS
MICROWAVE RADIATION
MORPHOLOGY
NEUTRINOS
NONLUMINOUS MATTER
RADIATIONS
RELICT RADIATION
SPATIAL DISTRIBUTION
UNIVERSE