Large-scale velocity fields as a test of cosmological models

Details Large-scale velocity fields as a test of cosmological models Large-scale velocity fields as a test of cosmological models

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.323..132v&link_type=abstract

Nature (ISSN 0028-0836), vol. 323, Sept. 11, 1986, p. 132, 133. ESA-supported research.

Mathematics

Probability

87

Astronomical Models, Bayes Theorem, Cosmology, Velocity Distribution, Black Body Radiation, Dark Matter, Hubble Constant, Mass Flow, Universe

Scientific paper

It has been suggested that the Hubble expansion on large scales is distorted by bulk matter flows of surprisingly large amplitude. Using Bayesian statistics of conditional probability, the authors show here that a high amplitude for large-scale matter flows can be used to rule out, at the 95% confidence level or better, both hot dark matter and cold dark matter models of the growth of structure in the Universe. No random-phase initial conditions with constant-curvature initial perturbations are likely to be consistent with bulk flows relative to the cosmic microwave background exceeding 700 km s-1 on scales of 50h-1Mpc.

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