An Updated Constraint on Variations of the FineStructure Constant Using Wavelengths of Fe II Absorption Line Multiplets
An Updated Constraint on Variations of the FineStructure Constant Using Wavelengths of Fe II Absorption Line Multiplets
Source title:
Symmetry, 10(12): 722,
2018
(ISI)
Academic year of acceptance:
2018-2019
Abstract:
A new stringent limit relating to the variation of the fine-structure constant ( α = e 2 4 π ε 0 ℏ c ) has been extracted from Ritz wavelengths of 27 quasi_stellar object (QSO) absorption spectra lines of Fe II. The calculation was combined with laboratory wavelengths and QSO spectra to obtain the result Δ α / α = ( 0.027 ± 0.832 ) × 10 − 6 . This result suggests how dedicated astrophysical estimations can improve these limits in the future and can also constrain space_time variations.