Probing the time-variation of the fine-structure constant: Results based on Si IV doublets from a UVES sample

Preprint
Publisher Website
Google Scholar
  • 11 August 2004
Abstract
We report a new constraint on the variation of the fine-structure constant based on the analysis of 15 Si IV doublets selected from a ESO-UVES sample. We find \Delta\alpha/\alpha= +(0.15 +/- 0.43) 10^{-5} over a redshift range of 1.59< z < 2.92 which is consistent with no variation in \alpha. This result represents a factor three improvement on the constraint on \Delta\alpha/\alpha based on Si IV doublets compared to the published results in the literature. Alkali doublet method used here avoids the implicit assumptions used in the many-multiplet method that chemical and ionization homogeneities are negligible and isotopic abundances are close to the terrestrial value.

This publication has 0 references indexed in Scilit: