Linearized stability analysis of gravastars in noncommutative geometry

Abstract

In this work, we find exact gravastar solutions in the context of noncommutative geometry, and explore their physical properties and characteristics. The energy density of these geometries is a smeared and particle-like gravitational source, where the mass is diffused throughout a region of linear dimension $\sqrt{(\alpha )}$ due to the intrinsic uncertainty encoded in the coordinate commutator. These solutions are then matched to an exterior Schwarzschild spacetime. We further explore the dynamical stability of the transition layer of these gravastars, for the specific case of $\beta =M^2/\alpha <1.9$, where M is the black hole mass, to linearized spherically symmetric radial perturbations about static equilibrium solutions. It is found that large stability regions exist and, in particular, located sufficiently close to where the event horizon is expected to form.

6 pages, 3 figures

References in corpus (34)

• Noncommutative geometry inspired charged black holes
• How to tell a gravastar from a black hole
• Instabilities of wormholes and regular black holes supported by a phantom scalar field
• Non-commutative geometry inspired higher-dimensional charged, black holes
• Generic spherically symmetric dynamic thin-shell traversable wormholes in standard general relativity
• Ergoregion instability of ultra-compact astrophysical objects
• Stability of Chaplygin gas thin-shell wormholes
• Cylindrical thin-shell wormholes
• Gravastars supported by nonlinear electrodynamics
• Thin shell wormholes in higher dimensiaonal Einstein-Maxwell theory
• Can accretion disk properties distinguish gravastars from black holes?
• Thin-shell wormholes in dilaton gravity
• On the ergoregion instability in rotating gravastars
• Electrically charged gravastar configurations
• Where are all the gravastars? Limits upon the gravastar model from accreting black holes
• Self sustained phantom wormholes in semi-classical gravity
• Phantom stars and topology change
• Self-sustained traversable wormholes in noncommutative geometry
• Van der Waals quintessence stars
• Gravastar energy conditions revisited
• Thin-shell wormholes associated with global cosmic strings
• The decay-time of non-commutative micro-black holes
• Stable and "bounded excursion" gravastars, and black holes in Einstein's theory of gravity
• Electromagnetic Fields of Slowly Rotating Magnetized Gravastars
• Exact dark energy star solutions
• Generic thin-shell gravastars
• Thin Shell Wormhole in Heterotic String Theory
• Traversable wormholes in a string cloud
• Self-sustained wormholes in modified dispersion relations
• A Theoretical Construction of Thin Shell Wormhole from Tidal Charged Black hole
• Radial stability analysis of the continuous pressure gravastar
• Black hole evaporation in a spherically symmetric non-commutative space-time
• Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars
• Dark Energy and Condensate Stars: Casimir Energy in the Large

Cited by in corpus (28)

• Gravastars in $f(R,\mathcal{T})$ gravity
• Gravastar Shadows
• Charged Gravastars in Modified Gravity
• Gravastars in $f(\mathcal{G},T)$ Gravity
• Gravastars in $f(\mathbb{T},\mathcal{T})$ gravity
• Study of gravastars under $f(\mathbb{T})$ gravity
• Charged Thin-shell Gravastars in Noncommutative Geometry
• Noncommutative geometry inspired wormholes with conformal motion
• Gravastars in $f(R,G)$ Gravity
• Stability of Charged Thin-Shell Gravastars with Quintessence
• Braneworld gravastars admitting conformal motion
• Asymmetric Thin-Shell Wormholes
• Stable and self consistent charged gravastar model within the framework of $f(R,T)$ gravity
• Stability of Gravastars with Exterior Regular Black Holes
• Stable Bounded Excursion Gravastars with Regular Black Holes
• Stability of $d$-dimensional Gravastars with Variable Equation of State
• The minimum mass of a spherically symmetric object in $D$-dimensions, and its implications for the mass hierarchy problem
• Stable Gravastars: Guilfoyle's electrically charged solutions
• Conformally symmetric wormhole solutions supported by non-commutative geometry in $f(Q,T)$ gravity
• Stability analysis of Lower Dimensional Gravastars in noncommutative geometry
• Charged gravastar model in $f(T)$ gravity admitting conformal motion
• Charged gravastar model in noncommutative geometry under $f(\mathbb{T})$ gravity
• Noncommutative-geometry inspired charged wormholes with low tidal forces
• Stars in M theory (made up of intersecting branes)
• Massive Compact Objects in a Quantum Theory of Gravity
• Thin-shell gravastar in a noncommutative BTZ geometry
• Charged Gravastar Solutions in the Finch-Skea Framework with f(\mathbb{Q}) Gravity
• Shadow of a Noncommutative Thin-Shell Gravastar