The Universal Rotation Curve of Spiral Galaxies

Abstract

The observed strong dark-to-luminous matter coupling is described by a bias relation between visible and dark matter sources. We discuss the bias which emerges in the case where the topological structure of the Universe at very large distances does not match properly that of the Friedman space. With the use of such "topological" bias, we construct the Universal Rotation Curve (URC) for spirals which occurs to be in a striking agreement with the empirically known URC. We also show that the topological bias explains the origin of the Tully-Fisher relation ($L\sim V^4$) and predicts peculiar oscillations in the URC with a characteristic length $\sim \sqrt{L}$.

arXiv comment5 pages, 1 figure, moderate revision accepted in MNRAS

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