Cosmological evolution of cosmic strings with time-dependent tension

2005/03/31 by Masahide Yamaguchi
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevd.72.043533

published as Phys.Rev. D72 (2005) 043533 · 9 pages, to appear in Phys. Rev. D

arxiv created 2005/08/22 · openalex publication_date 2005/08/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We discuss the cosmological evolution of cosmic strings with time-dependent tension. We show that, in the case that the tension changes as a power of time, the cosmic string network obeys the scaling solution: the characteristic scale of the string network grows with the time. But due to the time dependence of the tension, the ratio of the energy density of infinite strings to that of the background universe is not necessarily constant.

Citations

• Topological defects and corrections to the Nambu action
• Cosmological perturbations and the reionization epoch
• Extrinsic curvature dependence of Nielsen-Olesen strings
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Topology of cosmic domains and strings