https://doi.org/10.1140/epjc/s10052-021-09625-4
Regular Article - Theoretical Physics
Probing variation of the fine-structure constant in runaway dilaton models using Strong Gravitational Lensing and Type Ia Supernovae
1
Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, 59300-000, Natal, RN, Brazil
2
Departamento de Física, Universidade do Estado do Rio Grande do Norte, 59610-210, Mossoró, RN, Brazil
Received:
14
April
2021
Accepted:
7
September
2021
Published online:
16
September
2021
In order to probe a possible time variation of the fine-structure constant (
), we propose a new method based on Strong Gravitational Lensing and Type Ia Supernovae observations. By considering a class of runaway dilaton models, where 
, we obtain constraints on 
at the level 
(
captures the physical properties of the model). Since the data set covers the redshift range 
, the constraints derived here provide independent bounds on a possible time variation of at low, intermediate and high redshifts.
© The Author(s) 2021
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