Regular Article - Theoretical Physics
Probing variation of the fine-structure constant in runaway dilaton models using Strong Gravitational Lensing and Type Ia Supernovae
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
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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