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Fractal Properties and Small-scale Structure of Cosmic String Networks

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arxiv astro-ph/0511792 v1 pith:7MRS7DBZ submitted 2005-11-29 astro-ph gr-qchep-phhep-th

C.J.A.P. Martins (1 , 2) , E.P.S. Shellard (2) ((1) CFP , U. Porto; (2) DAMTP , U. Cambridge) This is my paper · ORCID
classification astro-phgr-qchep-phhep-th
keywords stringcosmicfractalnetworkspropertiessmall-scaleevidenceloop
verification ladder T0 review T1 audit T2 compute T3 formal

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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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