A small universe after all?

Details A small universe after all? A small universe after all?

1999-06-25

arxiv.org/abs/astro-ph/9906401v2

Phys.Rev. D62 (2000) 087304

Astronomy and Astrophysics

Astrophysics

4 pages, RevTeX, 7 Figures

Scientific paper

10.1103/PhysRevD.62.087304

The cosmic microwave background radiation allows us to measure both the geometry and topology of the universe. It has been argued that the COBE-DMR data already rule out models that are multiply connected on scales smaller than the particle horizon. Here we show the opposite is true: compact (small) hyperbolic universes are favoured over their infinite counterparts. For a density parameter of Omega_o=0.3, the compact models are a better fit to COBE-DMR (relative likelihood ~20) and the large-scale structure data (sigma_8 increases by ~25%).

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