Peculiar velocities from cosmic strings

Details Peculiar velocities from cosmic strings Peculiar velocities from cosmic strings

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvd..36..335b&link_type=abstract

Physical Review D (Particles and Fields), Volume 36, Issue 2, 15 July 1987, pp.335-345

Physics

21

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The peculiar velocities with respect to the uniform Hubble expansion which arise in the cosmic-string theory of galaxy formation are estimated analytically and compared to numerical simulations. In contrast with models of formation of structure based on primordial linear energy-density perturbations with random phases the distribution of velocities in the cosmic-string scenario is highly non-Gaussian. The most likely velocities are approximately scale independent for scales smaller than 50h-1 Mpc. We discuss both the effects of cosmic-string loops and of wakes. The analytical analysis presented in this paper complements earlier work in which the numerical results were presented.

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