Cosmic-String–Seeded Structure Formation

Avelino, P. P.; Shellard, E. P. S.; Wu, J. H. P.; Allen, Bruce

doi:10.1103/PhysRevLett.81.2008

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Cosmic-String–Seeded Structure Formation

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Allen, Bruce
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Avelino, P. P., Shellard, E. P. S., Wu, J. H. P., & Allen, B. (1998). Cosmic-String–Seeded Structure Formation. Physical Review Letters, 81(10), 2008-2011. doi:10.1103/PhysRevLett.81.2008.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-593D-D

Abstract

We describe the results of high-resolution numerical simulations of string-induced structure formation in open universes and those with a nonzero cosmological constant. For models with Γ = Ωh = 0.1–0.2 and a cold dark matter background, we show that the linear density fluctuation power spectrum has both an amplitude at 8h-1 Mpc, σ8, and an overall shape which are consistent within uncertainties with those currently inferred from galaxy surveys. The cosmic string scenario with hot dark matter requires a strongly scale-dependent bias in order to agree with observations.