Hybrid metric-Palatini gravity: black holes, wormholes, singularities and instabilities
arXiv:2006.00559 · doi:10.1134/S0202289320030044
Abstract
The hybrid metric-Palatini theory of gravity (HMPG), proposed in 2012 by T. Harko et al., is known to successfully describe both local (solar-system) and cosmological observations. We discuss static, spherically symmetric vacuum solutions of HMPG with the aid of its scalar-tensor representation. This scalar-tensor theory coincides with general relativity with a conformally coupled scalar field (which can be canonical or phantom), therefore the known solutions of this theory are re-interpreted in terms of HMPG. In particular, in the case of zero scalar field potential , such that both Riemannian and Palatini Ricci scalars are zero, generic asymptotically flat solutions either contain naked singularities or describe traversable wormholes, and there are only special cases of black hole solutions with extremal horizons. There is also a one-parameter family of solutions with an infinite number of extremal horizons between static regions. Examples of analytical solutions with nonzero potentials are also described, among them black hole solutions with simple horizons which are generic but, for canonical scalars, they require (at least partly) negative potentials. With phantom scalars there are ``black universe'' solutions that lead beyond the horizon to an expanding universe instead of a singularity. Most of the solutions under consideration turn out to be unstable under scalar monopole perturbations, but some special black hole solutions are stable.
arXiv comment17 pages, 7 figures
References in corpus (40)
- Dynamics of dark energy
- Extended Theories of Gravity
- Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
- Regular phantom black holes
- Instabilities of wormholes and regular black holes supported by a phantom scalar field
- Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration
- Fate of the first traversible wormhole: black-hole collapse or inflationary expansion
- Scalar fields, energy conditions, and traversable wormholes
- Instability of wormholes supported by a ghost scalar field. I. Linear stability analysis
- Regular black holes and black universes
- Hybrid metric-Palatini gravity
- Cosmology of hybrid metric-Palatini f(X)-gravity
- The virial theorem and the dark matter problem in hybrid metric-Palatini gravity
- Instability of wormholes supported by a ghost scalar field. II. Nonlinear evolution
- Notes on wormhole existence in scalar-tensor and F(R) gravity
- Generalized hybrid metric-Palatini gravity
- No realistic wormholes from ghost-free scalar-tensor phantom dark energy
- Magnetic black universes and wormholes with a phantom scalar
- Hybrid modified gravity unifying local tests, galactic dynamics and late-time cosmic acceleration
- Phantom Black Holes in Einstein-Maxwell-Dilaton Theory
- Coexistence of black holes and a long-range scalar field in cosmology
- Wormholes in generalized hybrid metric-Palatini gravity obeying the matter null energy condition everywhere
- On the stability of scalar-vacuum space-times
- Spherically symmetric false vacuum: no-go theorems and global structure
- Structure and stability of cold scalar-tensor black holes
- Invariant solutions and Noether symmetries in Hybrid Gravity
- Palatini formulation of pure gravity yields Einstein gravity with no massless scalar
- Exact Hairy Black Holes and their Modification to the Universal Law of Gravitation
- Cold black holes and conformal continuations
- Scalar-tensor gravity and conformal continuations
- Cosmological phase space of generalized hybrid metric-Palatini theories of gravity
- Spherically symmetric static vacuum solutions in hybrid metric-Palatini gravity
- Effective theory approach to brane world black holes
- Spherically symmetric black holes and wormholes in hybrid metric-Palatini gravity
- Scalar modes in extended hybrid metric-Palatini gravity: weak field phenomenology
- Electrically Charged Cold Black Holes in Scalar-Tensor Theories
- Magnetic wormholes and black universes with invisible ghosts
- On wormholes with long throats and the stability problem
- Instability of wormholes with a nonminimally coupled scalar field
- Electrically charged and neutral wormhole instability in scalar-tensor gravity
Cited by in corpus (17)
- Dynamic wormhole geometries in hybrid metric-Palatini gravity
- Thick brane structures in generalized hybrid metric-Palatini gravity
- Sudden singularities in generalized hybrid metric-Palatini cosmologies
- Weak-field regime of the generalized hybrid metric-Palatini gravity
- Black Hole Perturbations and Quasinormal Modes in Hybrid Metric-Palatini Gravity
- Cosmic strings in generalized hybrid metric-Palatini gravity
- Thin accretion disk signatures in hybrid metric-Palatini gravity
- Spherically symmetric space-times in generalized hybrid metric-Palatini gravity
- New cosmological solutions in hybrid metric-Palatini gravity from dynamical symmetries
- Polarization and speed of gravitational waves in hybrid metric-Palatini f(R)-gravity
- On the stability of electrovacuum space-times in scalar-tensor gravity
- Novel electrically charged wormhole, black hole and black bounce exact solutions in hybrid metric-Palatini gravity
- Evolving Wormholes in a Cosmological Background
- On the stability of spherically symmetric space-times in scalar-tensor gravity
- Gödel-type solutions in hybrid metric-Palatini gravity
- Horizons, throats and bounces in hybrid metric-Palatini gravity with a non-zero potential
- Gravitational waveforms from inspiral compact binaries in Hybrid metric-Palatini gravity