Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 8, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2022/08/062
Keywords
Bayesian reasoning; gravitational lensing; modified gravity; supernovas
Funding
- CONICET [PIP 11220200100729CO]
- UBACYT [20020170100129BA]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico CNPq [165468/2020-3]
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This study proposes a new method to investigate the possible time variation of the speed of light and the fine-structure constant using Strong Gravitational Lensing and Type Ia Supernovae observations. The results suggest that while it is reasonable to treat the systems separately, no strong indication of varying c was found.
The possible time variation of the fundamental constants of nature has been an active subject of research since the large-number hypothesis was proposed by Dirac. In this paper, we propose a new method to investigate a possible time variation of the speed of light (c) along with the fine-structure constant ( ff) using Strong Gravitational Lensing (SGL) and Type Ia Supernovae (SNe Ia) observations. We assume a general approach to describe the mass distribution of lens-type galaxies, the one in favor of the power-law index model (PLAW). We also consider the runaway dilaton model to describe a possible timevariation of ff. In order to explore the results deeply, we split the SGL sample into five sub-samples according to the lens stellar velocity dispersion and three sub-samples according to lens redshift. The results suggest that it is reasonable to treat the systems separately, but no strong indication of varying c was found.
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