Abstract
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%).
Keywords
Cosmic microwave backgroundPhysicsUniverseParticle horizonHorizonTheoretical physicsCOSMIC cancer databaseCosmic background radiationMeasure (data warehouse)De Sitter universeAstronomyComputer scienceSteady State theoryDatabaseQuantum mechanics
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 62
- Issue
- 8
- Citations
- 22
- Access
- Closed
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Cite This
Neil J. Cornish,
David N. Spergel
(2000).
A small universe after all?.
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields
, 62
(8)
.
https://doi.org/10.1103/physrevd.62.087304
Identifiers
- DOI
- 10.1103/physrevd.62.087304