Probing variation of the fine-structure constant in runaway dilaton models using Strong Gravitational Lensing and Type Ia Supernovae
Abstract In order to probe a possible time variation of the fine-structure constant ( $$\alpha $$ α ), we propose a new method based on Strong Gravitational Lensing and Type Ia Supernovae observations. By considering a class of runaway dilaton models, where $$\frac{\Delta \alpha }{\alpha }= - \gamma...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09625-4 |
| Summary: | Abstract In order to probe a possible time variation of the fine-structure constant ( $$\alpha $$ α ), we propose a new method based on Strong Gravitational Lensing and Type Ia Supernovae observations. By considering a class of runaway dilaton models, where $$\frac{\Delta \alpha }{\alpha }= - \gamma \ln {(1+z)}$$ Δ α α = - γ ln ( 1 + z ) , we obtain constraints on $$\frac{\Delta \alpha }{\alpha }$$ Δ α α at the level $$\gamma \sim 10^{-2}$$ γ ∼ 10 - 2 ( $$\gamma $$ γ captures the physical properties of the model). Since the data set covers the redshift range $$0.075 \le z \le 2.2649$$ 0.075 ≤ z ≤ 2.2649 , the constraints derived here provide independent bounds on a possible time variation of $$\alpha $$ α at low, intermediate and high redshifts. |
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| ISSN: | 1434-6044 1434-6052 |