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An Updated Constraint on Variations of the FineStructure Constant Using Wavelengths of Fe II Absorption Line Multiplets


T. D. Le

Source title: 
Symmetry, 10(12): 722, 2018 (ISI)
Academic year of acceptance: 

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.