Topological Defects in Contracting Universes

Details Topological Defects in Contracting Universes Topological Defects in Contracting Universes

2002-11-04

arxiv.org/abs/astro-ph/0211066v1

Phys.Rev.Lett. 89 (2002) 271301; Erratum-ibid. 89 (2002) 289903

Astronomy and Astrophysics

Astrophysics

Shorter version of astro-ph/0206287. To appear in Phys. Rev. Lett

Scientific paper

We study the behaviour and consequences of cosmic string networks in contracting universes. They approximately behave during the collapse phase as a radiation fluids. Scaling solutions describing this are derived and tested against high-resolution numerical simulations. A string network in a contracting universe, together with the gravitational radiation it generates, can affect the dynamics of the universe both locally and globally, and be an important source of radiation, entropy and inhomogeneity. We discuss possible implications for bouncing and cyclic models.

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