Indications of a Spatial Variation of the Fine Structure Constant
Indications of a Spatial Variation of the Fine Structure Constant
We previously reported Keck telescope observations suggesting a smaller value of the fine structure constant $\ensuremath{\alpha}$ at high redshift. New Very Large Telescope (VLT) data, probing a different direction in the Universe, shows an inverse evolution; $\ensuremath{\alpha}$ increases at high redshift. Although the pattern could be due to as yet …