Most precise single redshift bound to the variability of the fine-structure constant

Details Most precise single redshift bound to the variability of the fine-structure constant Most precise single redshift bound to the variability of the fine-structure constant

2005-12-12

arxiv.org/abs/astro-ph/0512287v1

Astronomy and Astrophysics

Astrophysics

2 pages, to appear in the Proceed. of IAU Symp.232 "The Scientific Requirements for Extremely Large Telescopes", eds. P. White

Scientific paper

10.1017/S1743921306000548

Verification of theoretical predictions of an oscillating behavior of the fine-structure constant, alpha, with cosmic time requires high precision measurements at individual redshifts, while in earlier studies the mean Delta alpha/alpha values averaged over wide redshift intervals were usually reported. This requirement can be met via the Single Ion Differential alpha Measurement (SIDAM) procedure. We apply SIDAM to the FeII lines associated with the damped Ly-alpha system observed at z=1.15 in the spectrum of HE0515-4414. The weighted mean calculated on base of carefully selected 34 FeII pairs is =(-0.07+/-0.84)10^{-6}. The precision of this estimate represents the absolute improvement with respect to what has been done in the measurements of Delta alpha/alpha.

Affiliated with

Also associated with

No associations

Rating

Most precise single redshift bound to the variability of the fine-structure constant 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 Most precise single redshift bound to the variability of the fine-structure constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Most precise single redshift bound to the variability of the fine-structure constant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-502033