Large-scale peculiar velocities and primordial power spectrum of fluctuations.

Details Large-scale peculiar velocities and primordial power spectrum of fluctuations. Large-scale peculiar velocities and primordial power spectrum of fluctuations.

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994kfnt...10q...9g&link_type=abstract

Kinematika Fiz. Nebesn. Tel, Tom 10, No. 1, p. 9 - 12

Mathematics

Logic

Galaxies: Velocities, Universe: Large-Scale Structure, Cosmological Models: Fluctuations

Scientific paper

The problem of interpretation of observational data on large-scale peculiar velocities of galaxies in cosmological models with random Gaussian density fluctuations is considered. A new model of peculiar velocity field in the region R < 70 h-1Mpc around the Local Group is presented: the peculiar velocities are the result of gravitational action of Hydra-Centaurus supercluster on the background of large-scale (λ > 300 h-1Mpc) cosmological velocity fluctuations with the rms amplitude ≡300 km/s. The existence of such large-scale fluctuations requires additional power in the power spectrum of density fluctuations P(k) on the scales λ > 3×102h-1Mpc. The present-day experimental limits on the cosmic microwave background temperature anisotropy on a scale of few degrees separate the preferential scale for additional power ≡104h-1Mpc.

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