Open AccessStrong limit on Δα/α from the analysis of feII absorp-tion line multiplets
Author(s) -
Le Duc Thong,
Nguyêñ Thị Thu Hương
Publication year - 2011
Publication title -
natural science
Language(s) - English
Resource type - Journals
eISSN - 2150-4105
pISSN - 2150-4091
DOI - 10.4236/ns.2011.37071
Subject(s) - limit (mathematics) , physics , constant (computer programming) , line (geometry) , epistemology , philosophy , theoretical physics , criminology , mathematics , sociology , computer science , mathematical analysis , geometry , programming language
Analysis of radiation from distant quasars suggested that the value of the fine-structure constant α=e2/4πε0hc changed in time during the evolution of the Universe. We estimate the cosmological time variability of the fine-structure constant from the analysis of an ensemble of Fe II λ1608, λ2344, λ2374, λ2383, λ2587 and λ2600 absorption lines at redshift z = 1.15 toward the QSO HE 0515-4414 using our new method. Our result is Δα/α=(–0.157±0.300)×10-6 . This result is the strongest constraint on Δα/α based on the analysis of FeII from quasar absorption lines in the literature