Large-scale peculiar velocities from cosmic strings

Details Large-scale peculiar velocities from cosmic strings Large-scale peculiar velocities from cosmic strings

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.326..672s&link_type=abstract

Nature (ISSN 0028-0836), vol. 326, April 16, 1987, p. 672-675.

Physics

17

Cosmology, Galactic Evolution, Radial Velocity, String Theory, Digital Simulation, Flux Density, Red Shift, Velocity Distribution

Scientific paper

Recent observations indicate that large regions of the universe 60 h-1Mpc in radius (where h is the Hubble constant in units of 100 km s-1Mpc-1) may be streaming coherently with velocities up to 1,000 km s-1 with respect to the rest frame determined by the cosmic microwave background. In this letter the peculiar velocities which arise in the cosmic string theory of galaxy formation are estimated using numerical simulations. The distribution of velocities is highly non-gaussian on scales smaller than 50 h-1Mpc. The most likely velocities are approximately scale independent on scales between 5 and 50 h-1Mpc.

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