Stringent limit on space-time variation of fine-structure constant using high-resolution of quasar spectra
Stringent limit on space-time variation of fine-structure constant using high-resolution of quasar spectra
Source title:
Heliyon, 6(9): e05011,
2020
(ISI)
Academic year of acceptance:
2021-2022
Abstract:
We have obtained a new limit on the space-time variation of the fine-structure constant using the observations of Mg II line in quasar J110325-264515 spectra with redshift zabs =1.8389. The obtained parameter is Δα/α =(−0.155 ± 0.728) × 10−6. It was derived from the comparison between the quasar J110325-264515 spectra and the laboratory sample spectra. The obtained result appears as a new highly sensitive probe of the cosmological variability of the fine-structure constant. From the relative spectra of the Mg II, we found the most stringent constraint up today on Δα/α comparing to the previously published results.