Structure Formation in the Universe from Texture Induced Fluctuations

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Abstract
We discuss structure formation with topological defects. First we present a partially new, local, and gauge invariant system of perturbation equations to treat microwave background and dark matter fluctuations induced by topological defects or any other type of seeds. We show that this system is well suited for numerical analysis of structure formation by applying it to the texture scenario. Our numerical results cover a larger dynamical range than previous investigations and are complementary to them since we use substantially different methods.
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