Cosmological Perturbations from Cosmic Strings

Details Cosmological Perturbations from Cosmic Strings Cosmological Perturbations from Cosmic Strings

1994-12-20

arxiv.org/abs/astro-ph/9412079v1

Nucl.Phys.Proc.Suppl.43:50-53,1995

Astronomy and Astrophysics

Astrophysics

LaTeX, 6pp. From Proceedings of `Trends in Astroparticle Physics', Stockholm, Sweden 22-25 September 1994, edited by L. Bergst

Scientific paper

10.1016/0920-5632(95)00449-J

Some aspects of the theory of cosmological perturbations from cosmic strings and other topological defects are outlined, with particular reference to a simple example: a spatially flat CDM-dominated universe. The conserved energy-momentum pseudo-tensor is introduced, and the equation for the density perturbation derived from it. It is shown how the scaling hypothesis for defect evolution results in a Harrison-Zel'dovich spectrum for wavelengths well inside the horizon.

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