Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357..293r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 357, July 10, 1990, p. 293-300.
Astronomy and Astrophysics
Astrophysics
34
Cosmology, Galactic Clusters, Phase Transformations, Relic Radiation, String Theory, Anisotropy, Flux Density, Galactic Evolution, Universe
Scientific paper
When a complex scalar field has a potential with two or more degenerate minima, then a network of domain walls joined together by cosmic strings can form and evolve as the universe expands. The evolution of such wall-string networks is computed numerically, for potentials with 1-6 minima. Results for two-dimensional simulations are given on a 1024 x 1024 grid, and for fully three-dimensional simulations on a 100 x 100 x 100 grid. It is found that the rms velocity of the walls is about 0.4c, independent of the number of minima in the potential. The number of walls within the horizon is constant, to within a logarithmic factor. The small number of walls within the horizon implies that a wall network produced in a late (postrecombination) phase transition cannot generate large-scale structure without violating anisotropy constraints on the cosmic microwave background.
Press William H.
Ryden Barbara S.
Spergel David N.
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