Nonminimally coupled curvature-matter gravity models and Solar System constraints

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2022

Autores

March, R (Autor) Outra; Bertolami, O (Autor) FCUP; Paramos, J (Autor) Outra; Dell'Agnello, S (Autor) Outra

Ata de Conferência Internacional

Título: 15th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, MG 2018

15th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, MG 2018

Rome, 1 July 2018 through 7 July 2018

Indexação

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00S-GB4

Abstract (EN): We discuss constraints to some nonminimally (NMC) coupled curvature-matter models of gravity by means of Solar System experiments. First we discuss a NMC gravity model which constitutes a natural extension of 1/Rn gravity to the nonminimally coupled case. Such a NMC gravity model is able to predict the observed accelerated expansion of the Universe. Differently from the f(R) = 1/Rn gravity case, which is not compatible with Solar System observations, it turns out that this NMC model is a viable theory of gravity. Then we consider a further NMC gravity model which admits Minkowski spacetime as a background, and we derive the 1/c expansion of the metric. The nonrelativistic limit of the model is not Newtonian, but contains a Yukawa correction. We look for trajectories around a static, spherically symmetric body. Since in NMC gravity the energy-momentum tensor of matter is not conserved, then the trajectories deviate from geodesics. We use the NMC gravity model to compute the perihelion precession of planets and we constrain the parameters of the model from radar observations of Mercury. © Relativistic Field Theories, MG 2018. All rights reserved.

Idioma: Inglês

Tipo (Avaliação Docente): Científica