On the Number of Cosmic Strings in Dark Energy Cosmologies

Details On the Number of Cosmic Strings in Dark Energy Cosmologies On the Number of Cosmic Strings in Dark Energy Cosmologies

2011-12-21

arxiv.org/abs/1112.5186v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Sumitted to JCAP

Scientific paper

The number of cosmic strings in the observable universe is relevant in determining the probability to detect the presence of cosmic strings through their gravitational signatures. In particular, we refer to the observation of gravitational lensing events and anisotropy in the CMB radiation induced by cosmic strings. In this paper a simple method is adopted to obtain an approximate estimate of the number of segments of cosmic strings, crossing the particle horizon, which fall inside the visible (i. e. observed) part of the universe. We show that a different choice of the CDM cosmological model, which affects volumes slightly, does actually have only a small weight on the expected number of cosmic string segments

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