Cosmic string-seeded structure formation

P. P. Avelino, E. P. S. Shellard, J. H. P. Wu, B. Allen

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.

Physical Review Letters
Volume 81, Page 2008
September 1998