Cosmic-String-Seeded Structure Formation

Details Cosmic-String-Seeded Structure Formation Cosmic-String-Seeded Structure Formation

1997-11-30

arxiv.org/abs/astro-ph/9712008v2

Phys.Rev.Lett.81:2008-2011,1998

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures; to appear in Phys. Rev. Lett. (Sept. 1998). With a cosmological constant included in the evolution equatio

Scientific paper

10.1103/PhysRevLett.81.2008

We describe the results of high-resolution numerical simulations of string-induced structure formation in open universes and those with a non-zero cosmological constant. For models with $\Gamma = \Omega h = 0.1 - 0.2$ and a cold dark matter background, we show that the linear density fluctuation power spectrum has both an amplitude at $8 h^{-1} Mpc, \sigma_8$, 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.

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