Cosmic string induced peculiar velocities

Details Cosmic string induced peculiar velocities Cosmic string induced peculiar velocities

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326...70v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 70-76. NSF-DOE-NASA-supported research.

Statistics

Computation

8

Cosmology, Dark Matter, String Theory, Velocity Distribution, Computational Astrophysics, Galaxies, Universe

Scientific paper

The authors calculate analytically the typical peculiar velocities on scales from 10h-1 to 60h-1 Mpc with cosmic string loops as the dominant source of primordial gravitational perturbations. From this the authors calculate the joint probability of finding streaming velocities of at least 600 km s-1 on large scales and local peculiar velocities of less than 800 km s-1. They consider a range in the parameters βGμ appropriate for both hot (HDM) and cold (CDM) dark matter scenarios. It is found that CDM and strings appear to have difficulties in producing large-scale high peculiar velocities of the order reported by Burstein et al. The larger values of βGμ and latter accretion start time associated with HDM and strings could yield much more favorable results.

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