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The Aeon Before Ours · source record · paper

The quest for CMB signatures of conformal cyclic cosmology

Bodnia, E.; Isenbaev, V.; Colburn, K.; Swearngin, J.; Bouwmeester, D. · 2024

AI-verified citationSRC-BODNIA-2024
identifier / locator
Journal of Cosmology and Astroparticle Physics 2024(05): 009. DOI: 10.1088/1475-7516/2024/05/009 (arXiv:2208.06021)
verification note
DOI confirmed via Crossref; the published full text was read during the 2026-08-22 verification batch.
reliability notes
  • The most thorough search to date: maximum-resolution data, both signatures, an artifact diagnosis (few-pixel spots manufacture low-variance circles under the GP criterion), and a machine-learning Hawking-point search (HawkingNet) with open-source code.
  • Explicitly notes its nulls do not disprove CCC and calls for refined quantitative CCC predictions.

Evidence drawn from this source

Undermines· strongCCC-E012

Bodnia et al. 2024: few-pixel spots manufacture the signatures; nulls at full resolution

what the source states
A maximum-resolution search of Planck and WMAP data: "We find that spots consisting of a few unusually bright (high-temperature) or dark (low-temperature) pixels, erroneously lead to regions with many low-variance circles, and consequently sets of near-concentric low-variance circles, when applying the search criteria used in previous work. After removing those spots from the data, no statistically significant low-variance circles can be found." HawkingNet, a ResNet18-based search, likewise finds no significant Hawking points, and the authors state that spots "with a magnitude in the range from 100 to 400 µK amplitude and spatial Gaussian extend between 0.7 and 1.2 degrees... can be ruled out." They add: "The absence of such statistically-significant distinct features in the currently available CMB data does not disprove the CCC model, but implies that higher resolution CMB data and/or refined CCC based predictions are needed."
what we infer
The most consequential record in the case: it does not merely fail to confirm the signatures, it identifies the generating mechanism for false positives under the proponents' own criterion (anomalous few-pixel spots inflating the local baseline variance) and publishes open-source code. It also models the epistemics this site asks for — an explicit statement of what its null does and does not establish, and a call for quantitative predictions (taken up as CCC-R005).
limitations
  • The ruled-out Hawking-point amplitude/size box is specific to the assumed Gaussian profile; fainter or differently shaped imprints are unconstrained.
  • The artifact diagnosis explains false circles around anomalous spots; it does not by itself account for every concentric family reported earlier.