Year: 2024
Type: article
Abstract: We investigate a family of axial symmetry solution constructed in general relativity (GR) within the framework of Ricci-inverse (RI) gravity theory. In GR, these solutions admitted closed time-like curves at an instant of time from an initial spacelike hypersurface in a causally well-behaved manner, thus, violates the causality condition. Our aim is to examine these axial symmetry solutions within the context of Ricci-inverse gravity theory to determine whether closed time-like curves still appear in this new gravity theory. We consider two Classes of RI-gravity models: (i) Class-II models defined by a function $$f=f({\mathcal {R}}, A^{\mu \nu }\,A_{\mu \nu })$$ f = f ( R , A μ ν A μ ν ) gravity and (ii) Class-III models defined by $$f=f({\mathcal {R}},{\mathcal {A}}, A^{\mu \nu }\,A_{\mu \nu })$$ f = f ( R , A , A μ ν A μ ν ) , where $$A^{\mu \nu }$$ A μ ν is the anti-curvature tensor, $${\mathcal {A}}=g_{\mu \nu }\,A^{\mu \nu }$$ A = g μ ν A μ ν as its scalar, and $$R^{\mu \nu }$$ R μ ν is the Ricci tensor. We are able solved the modified field equations considering these axial symmetry solutions as background in RI-gravity with null radiation as the matter content and the cosmological constant. This confirms that the chosen family of axial symmetry solutions are valid solutions in RI-gravity theory and, consequently, closed time-like curves is still form, analogous to their formation in GR.
Source: The European Physical Journal C
Authors: F. Ahmed, J. C. R. de Souza, A. F. Santos
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Award: G4032848402
OpenAlex ID: W4402926921