Axion boson stars with wormhole topology

Abstract

We investigate a novel gravitational configuration formed by a massless real phantom field and an axion scalar field, minimally coupled to gravity. This system describes an Ellis-type wormhole situated at the center of an axion star. By normalizing the mass of the axion field to unity, the physical properties of the model are determined by three independent parameters: the potential's decay constant, the frequency of the axion field, and the wormhole's throat parameter. We assess the traversability of this wormhole by examining the curvature scalars and energy conditions of the static solution. Our analysis of the wormhole's embedding diagrams indicates that, although the wormhole typically exhibits a single-throat geometry, a double-throat configuration featuring an equatorial plane may arise under specific conditions. Finally, an analysis of the null-geodesics reveals the existence of at least one unstable light ring at the wormhole throat.

arXiv comment24 pages, 28 figures

References in corpus (43)

• Dynamics of dark energy
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Dark Energy and the Accelerating Universe
• Cold and Fuzzy Dark Matter
• Can the dark energy equation-of-state parameter w be less than -1?
• The Low-Energy Frontier of Particle Physics
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectrum
• Is the gravitational-wave ringdown a probe of the event horizon?
• Exploring the String Axiverse with Precision Black Hole Physics
• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Constraining dark energy with SNe Ia and large-scale structure
• A New Cosmological Model of Quintessence and Dark Matter
• The State of the Dark Energy Equation of State
• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• The Cosmological Constant Problem and Quintessence
• Modified-gravity wormholes without exotic matter
• Wormholes in Dilatonic Einstein-Gauss-Bonnet Theory
• Cosmology with Interaction between Phantom Dark Energy and Dark Matter and the Coincidence Problem
• Possible wormholes in a brane world
• Instabilities of wormholes and regular black holes supported by a phantom scalar field
• Dilute and dense axion stars
• Strong deflection limit analysis and gravitational lensing of an Ellis wormhole
• Traversable wormholes in Einstein-Dirac-Maxwell theory
• Testing dark energy beyond the cosmological constant barrier
• Dense Axion Stars
• The large-scale modulation of the density distribution in standard axionic CDM and its cosmological and physical impact
• Traversable wormholes satisfying the weak energy condition in third-order Lovelock gravity
• Traversable Wormholes in General Relativity
• Example of a stable wormhole in general relativity
• Exotic Compact Objects and the Fate of the Light-Ring Instability
• Rotating Drops of Axion Dark Matter
• Phantom energy mediates a long-range repulsive force
• Static and spherically symmetric wormholes in metric-affine theories of gravity
• Boson Stars with Nontrivial Topology
• Epicyclic frequencies in the equatorial plane around stationary and axially symmetric wormhole geometries
• Ellis Wormholes in Anti-De Sitter Space
• Spontaneous Symmetry Breaking in Wormholes Spacetimes with Matter
• Uniqueness theorem for static wormholes in Einstein-phantom scalar field theory
• Stability of the Ellis-Bronnikov-Morris-Thorne Wormhole
• Are slowly rotating Ellis-Bronnikov wormholes stable?
• Probing the connection between entangled particles and wormholes in general relativity
• Einstein-Dirac-Maxwell wormholes in quantum field theory
• Dirac stars with wormhole topology