Further evidence for cosmological evolution of the fine structure constant.

@article{Webb2001FurtherEF,
  title={Further evidence for cosmological evolution of the fine structure constant.},
  author={J. Webb and M. Murphy and V. Flambaum and V. Dzuba and J. Barrow and C. Churchill and J. Prochaska and A. M. Wolfe},
  journal={Physical review letters},
  year={2001},
  volume={87 9},
  pages={
          091301
        }
}
  • J. Webb, M. Murphy, +5 authors A. M. Wolfe
  • Published 2001
  • Medicine, Physics
  • Physical review letters
  • We describe the results of a search for time variability of the fine structure constant alpha using absorption systems in the spectra of distant quasars. Three large optical data sets and two 21 cm and mm absorption systems provide four independent samples, spanning approximately 23% to 87% of the age of the universe. Each sample yields a smaller alpha in the past and the optical sample shows a 4 sigma deviation: Delta alpha/alpha = -0.72+/-0.18 x 10(-5) over the redshift range 0.5<z<3.5. We… CONTINUE READING
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