Wormholes supported by phantom energy from Shan-Chen cosmological fluids

Abstract

The firm observational confirmation of the late-time acceleration of the universe expansion has proposed a major challenge to the theoretical foundations of cosmology and the explanation of the acceleration mechanism requires the introduction of either a simply cosmological constant, or of a mysterious dark energy component (time dependent or modified gravities), filling the universe and dominating its current expansionary evolution. Universally given that the universe is permeated by a dark energy fluid, therefore, we should also investigate the astrophysical scale properties from the dark energy effects. In the present paper, the exact solutions of spherically-symmetrical Einstein field equations describing wormholes supported by phantom energy that violates the null energy condition from Shan-Chen fluid description are obtained. We have considered the important case that the model parameter $\psi \approx 1$ which corresponds to the `` saturation effect ", and this regime corresponds to an effective form of `` asymptotic freedom " for the fluids, but occurring at cosmological rather than subnuclear scales. Then we investigate the allowed range values of the model parameters $g$ and $\omega$ when the space-time metrics describe wormholes and discuss the possible singularities of the solutions, finding that the obtained spacetimes are geodesically complete. Moreover, we construct two traversable wormholes through matching our obtained interior solutions to the exterior Schwarzschild solutions and calculate out the total mass of the wormhole when the wormhole throat size $r\le a$ or $r\le b$, respectively. Finally, we acquire that the surface stress-energy $\sigma$ is zero and the surface tangential pressure $\wp$ is positive when discussing the surface stresses of the solutions and analyze the traversable wormholes.

8pps

References in corpus (32)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• A Large Mass Hierarchy from a Small Extra Dimension
• The Structure of Cold Dark Matter Halos
• An Alternative to Compactification
• Phantom Energy and Cosmic Doomsday
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Chameleon Fields: Awaiting Surprises for Tests of Gravity in Space
• Chameleon Cosmology
• Reconstructing Dark Energy
• Phantom energy traversable wormholes
• Stability of phantom wormholes
• Can vacuum decay in our Universe?
• Gravitational lensing of wormholes in the galactic halo region
• Possible existence of wormholes in the galactic halo region
• Cosmological model with viscosity media (dark fluid) described by an effective equation of state
• Cosmological Evolution in 1/R-Gravity Theory
• Bulk viscous cosmology: statefinder and entropy
• Modified Friedmann Equations in R${}^{-1}$-Modified Gravity
• Palatini Formulation of Modified Gravity with $\ln R$ Terms
• Possible existence of wormholes in the central regions of halos
• Friedmann cosmology with bulk viscosity: a concrete model for dark energy
• Modified equation of state, scalar field, and bulk viscosity in Friedmann universe
• Hedgehog ansatz and its generalization for self-gravitating Skyrmions
• Exactly solvable model of wormhole supported by phantom energy
• Non-linear superposition law and Skyrme crystals
• Seeking exactly solvable models of traversable wormholes supported by phantom energy
• Dark energy, gravitation and supernovae
• Stable accelerating universe with no hair
• Rip/singularity free cosmology models with bulk viscosity
• Dark energy from cosmological fluids obeying a Shan-Chen non-ideal equation of state

Cited by in corpus (15)

• Traversable wormhole geometries in $f(Q)$ gravity
• Traversable wormhole solutions with non-exotic fluid in framework of $f(Q)$ gravity
• Wormhole model with a hybrid shape function in f(R,T) gravity
• Morris-Thorne Wormholes in $f(R,T)$ modified theory of gravity
• Static phantom wormholes of finite size
• Black-Bounce in $f(T)$ Gravity
• Stability of Effective Thin-shell Wormholes Under Lorentz Symmetry Breaking Supported by Dark Matter and Dark Energy
• Traversable wormholes with logarithmic shape function in f(R, T) gravity
• Traversable holographic dark energy wormholes constrained by astronomical observations
• Periodic cosmic evolution in $f(Q)$ gravity formalism
• Thin-shell wormholes constrained by cosmological observations
• Static spherically symmetric wormhole with quadratic shape function and particle trajectories around it
• Wormholes from cosmological reconstruction based on Gaussian processes
• Wormholes in a viscous universe
• Model-independent traversable wormholes from baryon acoustic oscillations