Hubble Tension Solved? Study finds evidence of an 'Invisible Bias' in How We Measure the Universe
ncarol.com/10320545

HONOLULU - ncarol.com -- The long-standing "Hubble tension"—a discrepancy between early-universe measurements of cosmic expansion and late-universe distance measurements—remains one of modern cosmology's most debated puzzles. While the discrepancy is often interpreted as evidence for new physics in the universe's expansion history, a new study proposes a different possibility: part of the tension may arise from how distances are inferred.

In a recent implications analysis, independent researcher Aiden B. Smith examines whether gravitational-wave distance measurements—specifically from so-called "dark sirens"—could be subtly affected by assumptions about how gravitational waves propagate across cosmological distances.

More on ncarol.com

• "They Said It Was Impossible": This Bottle Turns Any Freshwater Source Into Ice-Cold, Purified Drinking Water in Seconds
• Patron Saints Of Music Names Allie Moskovits Head Of Sync & Business Development
• Dave Aronberg Named 2026 John C. Randolph Award Recipient by Palm Beach Fellowship of Christians & Jews
• General Relativity Challenged by New Tension Discovered in Dark Siren Cosmology
• Unseasonable Warmth Triggers Early Pest Season Along I-5 Corridor

Dark sirens are gravitational-wave events without confirmed electromagnetic counterparts. Their distances are inferred statistically using galaxy catalogues. Smith's analysis uses his previously identified propagation anomaly in the GWTC-3 dataset as a template and asks: if gravitational-wave amplitudes decay slightly differently than predicted by General Relativity, what effect would that have on cosmological inference?

The study finds that, under this hypothesis, applying standard General Relativity during distance compression can induce a shift in the inferred Hubble constant of approximately +2 to +5 km/s/Mpc—comparable in scale to the observed tension.

Importantly, the paper does not claim to resolve the Hubble tension. Instead, it demonstrates that gravitational-wave propagation assumptions are not mathematically neutral: if even modest deviations are present, they can bias late-time inferences.

The modified-propagation preference identified in the GWTC-3 dark-siren sample has been subjected to internal calibration and stress testing, including injection-based null simulations and robustness checks against selection and catalog perturbations. While the signal remains statistically unusual within the tested framework, confirming its physical origin will require independent replication and larger gravitational-wave samples from future observing runs.

More on ncarol.com

• Bug Busters Expands Service Footprint With New Carrollton, Georgia Branch
• Why KULR Could Be a Quiet Enabler of Space-Based Solar Power (SBSP) Over The Long Term: KULR Technology Group, Inc. (NY SE American: KULR)
• Why Finland Had No Choice But to Legalize Online Gambling
• High-Margin Energy & Digital Infrastructure Platform Created after Merger with Established BlockFuel Energy, Innovation Beverage Group (NAS DAQ: IBG)
• iFLO Pro Launches Its Groundbreaking iFLO Pro Mini At The 2026 AHR Expo In Las Vegas

If confirmed, the results would suggest that part of the Hubble tension may reflect a subtle distance-inference effect rather than a fundamental breakdown of the expansion model itself. If not, the analysis provides a quantitative diagnostic of where dark-siren cosmology may be vulnerable to systematic effects.

The full study and reproducibility materials are publicly available.

Data and Study Availability: While the work is currently in peer review, the full study is available to read on Smith's research journal at quasardipolephenomenon.org. All code and reproducibility artifacts associated with this analysis can be downloaded via Zenodo (DOI: 10.5281/zenodo.18635659) or accessed on GitHub.