https://doi.org/10.1140/epjc/s10052-021-09319-x
Regular Article - Theoretical Physics
Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
1
Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970, Natal, Rio Grande do Norte, Brazil
2
Facultad de Ciencias e Ingeniería, Universidad de Manizales, 170002, Manizales, Colombia
Received:
3
April
2021
Accepted:
5
June
2021
Published online:
22
June
2021
A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant (
). 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 
, we obtain limits on the physical properties parameter of the model (
) at the level 
(
). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of 
at a different range of redshifts.
© The Author(s) 2021
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