Novel electrically charged wormhole, black hole and black bounce exact solutions in hybrid metric-Palatini gravity

TL;DR

This paper derives exact solutions for electrically charged wormholes, black holes, and black bounces in hybrid metric-Palatini gravity, revealing diverse configurations and expanding the understanding of complex gravitational phenomena.

Contribution

It introduces a systematic method for finding exact solutions in HMPG, including traversable wormholes and black bounces, with analysis in both Jordan and Einstein frames.

Findings

Diverse solutions including wormholes and black holes identified

Solutions characterized by scalar field properties and horizon structures

Potential applications in modeling astrophysical phenomena

Abstract

This paper presents a systematic exploration of exact solutions for electrically charged wormholes, black holes, and black bounces within the hybrid metric-Palatini gravity (HMPG) framework. HMPG combines features of the metric and Palatini formulations of modified gravity, offering a powerful approach to address challenges in General Relativity, particularly those related to cosmic acceleration and dark matter. We examine configurations characterized by a zero scalar potential under spherical symmetry, and present solutions in both the Jordan and Einstein conformal frames. A diverse set of solutions emerges, including traversable wormholes, black holes with double horizons, and ``black universe'' models in which spacetime beyond the horizon leads to an expanding cosmological solution rather than a singularity. Each configuration is categorized according to the properties of the scalar field, with an in-depth analysis of the horizon and throat structures, asymptotic behaviour, and singularities. These findings underscore the versatility of HMPG in capturing complex gravitational phenomena and broadens the scope of the theory, offering a robust framework for modelling gravitational phenomena across a range of astrophysical contexts. Future work will benefit from extending these solutions to include scalar potentials, addressing both early-universe inflation and late-time acceleration, and applying observational data, such as gravitational lensing and gravitational wave measurements.