Cosmological density fluctuations produced by vacuum strings

Details Cosmological density fluctuations produced by vacuum strings Cosmological density fluctuations produced by vacuum strings

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981phrvl..46.1169v&link_type=abstract

Physical Review Letters, vol. 46, Apr. 27, 1981, p. 1169-1172.

Astronomy and Astrophysics

Astronomy

417

Cosmology, Density Distribution, Galactic Evolution, Phase Transformations, String Theory, Universe, Vacuum Effects, Background Radiation, Black Holes (Astronomy), Energy Dissipation, Gravitational Waves, Particle Theory, Transient Oscillations

Scientific paper

Consideration is given to the possible role of vacuum domain strings produced in the grand unification phase transition in the early universe in the generation of the density fluctuations giving rise to galaxies. The cosmological evolution of the strings formed in the grand unification phase transition is analyzed, with attention given to possible mechanisms for the damping out of oscillations produced by tension in convoluted strings and closed loops. The cosmological density fluctuations introduced by infinite strings and closed loops smaller than the horizon are then shown to be capable of giving rise to mass condensations on a scale of approximately 10 to the 9th solar masses at the time of the decoupling of radiation from matter, around which the galaxies condense. Differences between the present theory and that suggested by Zel'dovich (1980) are pointed out, and it is noted that string formation at the grand unification phase transition is possible only if the manifold of the degenerate vacua of the gauge theory is not simply connected.

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