New Restrictions on Spatial Topology of the Universe from Microwave Background Temperature Fluctuations

Details New Restrictions on Spatial Topology of the Universe from Microwave Background Temperature Fluctuations New Restrictions on Spatial Topology of the Universe from Microwave Background Temperature Fluctuations

1993-05-23

arxiv.org/abs/gr-qc/9305019v1

JETP Lett. 57 (1993) 622-625

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, report LANDAU-93-04/GR-1

Scientific paper

If the Universe has the topology of a 3-torus ($T^3$), then it follows from recent data on large-scale temperature fluctuations $\Delta T/T$ of the cosmic microwave background that either the minimal size of the torus is at least of the order of the present cosmological horizon, or the large-scale $\Delta T/T$ pattern should have a symmetry plane (in case of the effective $T^1$ topology) or a symmetry axis (in case of the effective $T^2$ topology), the latter possibility being probably excluded by the data.

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