English

CROCS Data Release I: Constraints on the Hubble Constant

Cosmology and Nongalactic Astrophysics 2026-04-01 v1 Astrophysics of Galaxies

Abstract

Recent cosmological surveys and datasets have highlighted a variety of tensions to the concordance model of our universe, Λ\LambdaCDM. Of particular interest is the Hubble tension, the 5.5σ5.5\sigma discrepancy between measurements of the Hubble constant H0H_0 using high redshift CMB data from Planck (67.27±0.6067.27\pm0.60kms1Mpc1\text{s}^{-1}\text{Mpc}^{-1}) and low redshift supernovae from SH0ES (73.2±1.373.2\pm1.3kms1Mpc1\text{s}^{-1}\text{Mpc}^{-1}). To avoid stepping on any toes, we have initiated the CROCS collaboration to resolve this tension, gathering experts from across many fields of cosmology, astrophysics, astronomy, machine learning, data science, philosophy, and astrology. In this paper, we present findings from CROCS Data Release 1, corresponding to the first 3\sim3 days and 27 minutes (rest frame) of observation. We perform a robust statistical analysis, showing that Planck and SH0ES both suffer from imperial biasing systematics (IBS) at 5σ5\sigma significance. Accounting for these errors by converting to metric units reconciles the high and low redshift data, with H0=69.00±0.420H_0 = 69.00\pm0.420kms1Mpc1\text{s}^{-1}\text{Mpc}^{-1}. We thus report that our results are sufficient to end the Hubble tension for good.

Keywords

Cite

@article{arxiv.2603.29879,
  title  = {CROCS Data Release I: Constraints on the Hubble Constant},
  author = {Luke Weisenbach and Sophie L. Newman and Kieran Graham and Sai S. Dhavala and Benjamin Floyd and Neel Shah and Gemini 3 Flash and The CROCS Collaboration},
  journal= {arXiv preprint arXiv:2603.29879},
  year   = {2026}
}

Comments

10 pages, 3 figures

R2 v1 2026-07-01T11:46:30.601Z