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Updated: Dec 7, 2025

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
Published on: August 19, 2021
Stringent limit on space-time variation of fine-structure constant using high-resolution of quasar spectra
T D Le1,2
1Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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 . The obtained parameter is . 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 comparing to the previously published results.
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