Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
Abstract A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant ( $$\alpha $$ α ). Our analyses are based on time-delay of Strong Gravitational Lensing and Type Ia Supernovae observations. By considering the runaway...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09319-x |
| Summary: | Abstract A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant ( $$\alpha $$ α ). Our analyses are based on time-delay of Strong Gravitational Lensing and Type Ia Supernovae observations. By considering the runaway dilaton scenario, where the cosmological temporal evolution of the fine-structure constant is given by $$\frac{\Delta \alpha }{\alpha } \approx -\gamma \ln {(1+z)}$$ Δ α α ≈ - γ ln ( 1 + z ) , we obtain limits on the physical properties parameter of the model ( $$\gamma $$ γ ) at the level $$10^{-2}$$ 10 - 2 ( $$1\sigma $$ 1 σ ). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of $$\frac{\Delta \alpha }{\alpha } \ne 0$$ Δ α α ≠ 0 at a different range of redshifts. |
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| ISSN: | 1434-6044 1434-6052 |