6533b852fe1ef96bd12ab756
RESEARCH PRODUCT
New scalar compact objects in Ricci-based gravity theories
Diego Rubiera-garciaEmanuele OraziGonzalo J. OlmoV. I. Afonsosubject
High Energy Physics - TheoryModified gravityFísica-Modelos matemáticosGeneral relativityGravityFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)01 natural sciencesGeneral Relativity and Quantum CosmologyTheoretical physicsGeneral Relativity and Quantum Cosmology0103 physical sciencesFísica matemáticaWormhole010306 general physicsRicci curvaturePhysics010308 nuclear & particles physicsScalar (physics)Astronomy and AstrophysicsGR black holesBlack holeHigh Energy Physics - Theory (hep-th)Horizon (general relativity)WormholesScalar fieldSchwarzschild radiusdescription
Taking advantage of a previously developed method, which allows to map solutions of General Relativity into a broad family of theories of gravity based on the Ricci tensor (Ricci-based gravities), we find new exact analytical scalar field solutions by mapping the free-field static, spherically symmetric solution of General Relativity (GR) into quadratic $f(R)$ gravity and the Eddington-inspired Born-Infeld gravity. The obtained solutions have some distinctive feature below the would-be Schwarzschild radius of a configuration with the same mass, though in this case no horizon is present. The compact objects found include wormholes, compact balls, shells of energy with no interior, and a new kind of object which acts as a kind of wormhole membrane. The latter object has Euclidean topology but connects antipodal points of its surface by transferring particles and null rays across its interior in virtually zero affine time. We point out the relevance of these results regarding the existence of compact scalar field objects beyond General Relativity that may effectively act as black hole mimickers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-11 |