Indications of a spatial variation of the fine structure constant.

@article{Webb2011IndicationsOA,
  title={Indications of a spatial variation of the fine structure constant.},
  author={Jonathan K Webb and Julian A. King and Michael T. Murphy and V. V. Flambaum and Robert F. Carswell and Matthew B. Bainbridge},
  journal={Physical review letters},
  year={2011},
  volume={107 19},
  pages={191101}
}
We previously reported Keck telescope observations suggesting a smaller value of the fine structure constant α at high redshift. New Very Large Telescope (VLT) data, probing a different direction in the Universe, shows an inverse evolution; α increases at high redshift. Although the pattern could be due to as yet undetected systematic effects, with the systematics as presently understood the combined data set fits a spatial dipole, significant at the 4.2 σ level, in the direction right… CONTINUE READING
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