Cosmic strings, loops, and linear growth of matter perturbations

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Wu, JHP (Author) Other; Avelino, PP (Author) FCUP; Shellard, EPS (Author) Other; Allen, B (Author) Other

Journal

Title: International Journal of Modern Physics D

Vol. 11

Pages: 61-102

ISSN: 0218-2718

Publisher: World Scientific

Indexing

ISI Web of Knowledge - 24 Citations

Scopus - 23 Citations

Other information

Authenticus ID: P-000-RCH

DOI: 10.1142/s0218271802001299

Abstract (EN): We describe a detailed study of string-seeded structure formation using high resolution numerical simulations in open universes and those with a non-zero cosmological constant. We provide a semi-analytical model which can reproduce these simulation results including the effect from small loops chopped of by the string network. A detailed study of cosmic string network properties regarding structure formation is also given, including the correlation time, the topological analysis of the source spectrum, the correlation between long strings and loops, and the evolution of long-string and loop energy densities. For models with Gamma = Omegah = 0.1 - 0.2 and a cold dark matter background, we show that the linear density fluctuation power spectrum induced by cosmic strings has both an amplitude at 8h(-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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 42