Star-plus-wormhole systems with two interacting scalar fields

Abstract

We study static, spherically symmetric mixed configurations with a nontrivial (wormhole) spacetime topology provided by the presence of two interacting ghost scalar fields. Wormhole is assumed to be filled by a perfect relativistic neutron fluid modeled by a polytropic equation of state. For such mixed configurations, we find regular, asymptotically flat general relativistic solutions. It is shown that the maximum of the fluid density is always shifted from the center, and the resulting configurations represent, in general, double-throat systems.

10 pages, 3 figures, minor corrections to content, new references added, version published in IJMPD. arXiv admin note: text overlap with arXiv:1401.7093

References in corpus (8)

• Instability of wormholes supported by a ghost scalar field. I. Linear stability analysis
• Instability of wormholes supported by a ghost scalar field. II. Nonlinear evolution
• Example of a stable wormhole in general relativity
• Hiding a neutron star inside a wormhole
• Magnetic fields in mixed neutron-star-plus-wormhole systems
• Phantom fields: bounce solutions in the early Universe and S-branes
• Bianchi type I model with two interacting scalar fields
• 4D static solutions with interacting phantom fields

Cited by in corpus (8)

• From the Flamm-Einstein-Rosen bridge to the modern renaissance of traversable wormholes
• Can mixed star-plus-wormhole systems mimic black holes?
• Wormholes leading to extra dimensions
• Geometrically constrained multifield models with BNRT solutions
• Mixed neutron-star-plus-wormhole systems: Rotating configurations
• Wormholes and black universes communicated with extra dimensions
• Compact and extended objects from self-interacting phantom fields
• Dirac stars with wormhole topology