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Strong limit on the spatial and temporal variations of the fine-structure constant

Published online by Cambridge University Press:  12 October 2016

T. D. Le
T. D. Le*
Affiliation:
Department of Physics, Center for Natural Science, Vietnam email: ldthong@hotmail.com
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Abstract

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Observed spectra of quasars provide a powerful tool to test the possible spatial and temporal variations of the fine-structure constant α = e2/ћc over the history of the Universe. It is demonstrated that high sensitivity to the variation of α can be obtained from a comparison of the spectra of quasars and laboratories. We reported a new constraint on the variation of the fine-structure constant based on the analysis of the optical spectra of the fine-structure transitions in [NeIII], [NeV], [OIII], [OI] and [SII] multiplets from 14 Seyfert 1.5 galaxies. The weighted mean value of the α-variation derived from our analysis over the redshift range 0.035 < z < 0.281 Δα/α= (4.50 ± 5.53) \times 10-5. This result presents strong limit improvements on the constraint on Δα/α compared to the published in the literature

Keywords

galaxies: fundamental parameters (classification, colors, luminosities, masses, radii, etc.)cosmology: observationsmethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 628 - 630
Copyright
Copyright © International Astronomical Union 2016 

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