Regular Article - Theoretical Physics
Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
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
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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