Cosmological evolution of cosmic strings with time-dependent tension

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 {\it not} necessarily constant.

9 pages, to appear in Phys. Rev. D

References in corpus (2)

• Scaling defect decay and the reionization history of the Universe
• Early reionization by cosmic strings revisited

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• High-Energy Astrophysical Neutrinos from Cosmic Strings
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• Non-Scaling Topological Defects and Gravitational Waves in Higgs Portal
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