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

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

2004-08-11

arxiv.org/abs/astro-ph/0408200v2

Astronomy and Astrophysics

Astrophysics

12 Pages, 7 figures. Accepted for publication in A&A. In addition to minor corrections an appendix is added in this revised ve

Scientific paper

10.1051/0004-6361:20041186

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) x 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 of three improvement on the constraint on \Delta\alpha/\alpha based on Si IV doublets compared to the published results in the literature. The alkali doublet method used here avoids the implicit assumptions used in the many-multiplet method that chemical and ionization inhomogeneities are negligible and isotopic abundances are close to the terrestrial value.

Affiliated with

Also associated with

No associations

Rating

Probing the time-variation of the fine-structure constant: Results based on Si IV doublets from a UVES sample does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Probing the time-variation of the fine-structure constant: Results based on Si IV doublets from a UVES sample, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing the time-variation of the fine-structure constant: Results based on Si IV doublets from a UVES sample will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-207859