3 papers
astro-ph.CO2026
Beyond CDM: fundamental constants as cosmological observables
Dinko MilakoviÄ, John K. Webb
Recent cosmological tensions pose difficulties for CDM. Forthcoming facilities will be able to check whether these tensions result from systematic effects or indeed with the $Î…
astro-ph.SR2025
Searching for new physics using high precision absorption spectroscopy; continuum placement uncertainties and the fine structure constant in strong gravity
Chung-Chi Lee, John K. Webb, Darren Dougan +3
Searches for variations of fundamental constants require a comprehensive understanding of measurement errors. This paper examines a source of error that is usually overlooked: the…
astro-ph.CO2025
The Mystery of Alpha and the Isotopes
John K. Webb, Chung-Chi Lee, Dinko Milakovic +3
We report unbiased AI measurements of the fine structure constant in two proximate absorption regions in the spectrum of the quasar HE05154414. The data are high resolution…