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- W2055233368 abstract "view Abstract Citations (150) References (32) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cosmic Fluctuation Spectra with Large-Scale Power Bardeen, J. M. ; Bond, J. R. ; Efstathiou, G. Abstract Observations of the cluster-cluster and cluster-galaxy correlation functions and of large-scale streaming velocities seem to indicate that more power exists on large scales than is predicted in the standard Omega = 1 cold dark matter (CDM) model with scale-invariant initial conditions. Although these observations are difficult and the results are not firmly established, these tests can in principle be used to discriminate sharply among cosmological models. The extra power required to explain the reported observations is explored by systematically varying cosmological models having initially Gaussian perturbations. Low Hubble constant models, hybrid models with hot and cold dark matter, models with both adiabatic and isocurvature modes present, and decaying dark matter models are shown to fail these observational tests. Models that are open or have a large cosmological constant do better, but still fail. A CDM model with a short-lived massive neutrino does have enough large-scale structure, although the origin of the required decay time is quite speculative. Microwave background anisotropies at a few degrees must be on the verge of detection if the required extra power exists. Publication: The Astrophysical Journal Pub Date: October 1987 DOI: 10.1086/165613 Bibcode: 1987ApJ...321...28B Keywords: Background Radiation; Big Bang Cosmology; Cosmic Rays; Dark Matter; Galactic Clusters; Radiant Flux Density; Astronomical Models; Cold Plasmas; Normal Density Functions; Astrophysics; COSMIC BACKGROUND RADIATION; COSMOLOGY; GALAXIES: CLUSTERING full text sources ADS |" @default.
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- W2055233368 date "1987-10-01" @default.
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- W2055233368 title "Cosmic fluctuation spectra with large-scale power" @default.
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