http://arxiv.org/abs/2210.11426
Anomalous large-angle cosmic microwave background anisotropies motivate further searches for cosmic topology. We demonstrate that for generic topologies of spatially flat spacetimes, off-diagonal correlations between microwave background harmonic coefficients over a wide range of scales encode significant topological information, even if the topology scale substantially exceeds the diameter of the observable Universe. Observational searches have so far considered only a small subset of testable topologies, and current limits on the topology scale are much weaker than generally understood.
Y. Akrami, C. Copi, J. Eskilt, et. al.
Fri, 21 Oct 22
23/76
Comments: 7 pages, 3 figures
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