From Scratch: A Direct Test of the Sound-Horizon Assumption
Abstract
An observational evaluation of the sound-horizon assumption using late-time expansion measurements and the CMB acoustic angle. The work examines whether current data can empirically determine the sound horizon without adopting early-universe physics and quantifies the uncertainties that arise from extrapolating beyond the redshift range of chronometer measurements.
Fields of Study & Subjects
Cosmology and Gravitation Theories
Galaxies: Formation
Evolution
Phenomena
Stellar
planetary
and galactic studies
Publication details
- Journal / source
- Zenodo (CERN European Organization for Nuclear Research)
- Publication date
- 4 December 2026
- Language
- EN
- Document type
- Preprint