Fractal Properties and Small-scale Structure of Cosmic String Networks

Details Fractal Properties and Small-scale Structure of Cosmic String Networks Fractal Properties and Small-scale Structure of Cosmic String Networks

2005-11-29

arxiv.org/abs/astro-ph/0511792v1

Phys.Rev.D73:043515,2006

Astronomy and Astrophysics

Astrophysics

6 pages

Scientific paper

10.1103/PhysRevD.73.043515

We present results from a detailed numerical study of the small-scale and loop production properties of cosmic string networks, based on the largest and highest resolution string simulations to date. We investigate the non-trivial fractal properties of cosmic strings, in particular, the fractal dimension and renormalised string mass per unit length, and we also study velocity correlations. We demonstrate important differences between string networks in flat (Minkowski) spacetime and the two very similar expanding cases. For high resolution matter era network simulations, we provide strong evidence that small-scale structure has converged to `scaling' on all dynamical lengthscales, without the need for other radiative damping mechanisms. We also discuss preliminary evidence that the dominant loop production size is also approaching scaling.

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