Hyperbolic Universes with a Horned Topology and the CMB Anisotropy

Ralf Aurich; Sven Lustig; Frank Steiner; Holger Then

doi:10.1088/0264-9381/21/21/010

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Hyperbolic Universes with a Horned Topology and the CMB Anisotropy

Ralf Aurich·Sven Lustig·Frank Steiner·Holger Then

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Abstract

We analyse the anisotropy of the cosmic microwave background (CMB) in hyperbolic universes possessing a non-trivial topology with a fundamental cell having an infinitely long horn. The aim of this paper is twofold. On the one hand, we show that the horned topology does not lead to a flat spot in the CMB sky maps in the direction of the horn as stated in the literature. On the other hand, we demonstrate that a horned topology having a finite volume could explain the suppression of the lower multipoles in the CMB anisotropy as observed by COBE and WMAP.

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Ralf Aurich, Sven Lustig, Frank Steiner, Holger Then. 2004-10-19. Hyperbolic Universes with a Horned Topology and the CMB Anisotropy. https://doi.org/10.1088/0264-9381%2F21%2F21%2F010

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