Promise of Future Searches for Cosmic Topology

2022/10/20 by Yashar Akrami, Y. Akrami, S Anselmi +15 · 1 voice · 27 citations
Physics and Astronomy · #Astronomy #COSMIC cancer database #Cosmic ray #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Particle physics #Physics #Space Science and Extraterrestrial Life #Topology (electrical circuits) #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevlett.132.171501

published in Physical Review Letters 132(17), 171501 (American Physical Society)

arxiv published 2022/10/20 · arxiv updated 2024/03/30 · openalex publication_date 2024/04/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

The shortest distance around the Universe through us is unlikely to be much larger than the horizon diameter if microwave background anomalies are due to cosmic topology. We show that observational constraints from the lack of matched temperature circles in the microwave background leave many possibilities for such topologies. We evaluate the detectability of microwave background multipole correlations for sample cases. Searches for topology signatures in observational data over the large space of possible topologies pose a formidable computational challenge.

Citations

• Testing the cosmological principle of isotropy: local power-spectrum estimates of theWMAPdata
• A weak acceleration effect due to residual gravity in a multiply connected universe
• Imprints of Spherical Nontrivial Topologies on the Cosmic Microwave Background
• TheN‐Point Correlation Functions of the First‐YearWilkinson Microwave Anisotropy ProbeSky Maps
• Is the Low-ℓMicrowave Background Cosmic?
• Non-Gaussian signatures in the temperature fluctuation observed by the Wilkinson Microwave Anisotropy Probe
• Testing for Non‐Gaussianity in theWilkinson Microwave Anisotropy ProbeData: Minkowski Functionals and the Length of the Skeleton
• Lack of large-angle TT correlations persists in WMAP and Planck
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• Planck2013 results. XXIII. Isotropy and statistics of the CMB
• A search for cosmic topology in the final WMAP data
• No large-angle correlations on the non-Galactic microwave sky
• Planck 2018 results
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Planck 2018 results: VI. Cosmological parameters

Discussions

• But it's still super interesting, and I'm curious what they think about non-flat structures since they limited their focus arxiv.org/abs/2210.11426 [bsky, 2 points, 0 comments]

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