Possible evidence for a variable fine-structure constant from QSO absorption lines: systematic errors
Possible evidence for a variable fine-structure constant from QSO absorption lines: systematic errors
Comparison of quasar (QSO) absorption spectra with laboratory spectra allows us to probe possible variations in the fundamental constants over cosmological time-scales. In a companion paper we present an analysis of Keck/HIRES spectra and report possible evidence suggesting that the fine-structure constant, α, may have been smaller in the past: …