Stability and Dynamics of Regular Thin-Shell Gravastars

This paper explores the stable and dynamical configuration of thin-shell gravastars developed from the matching of exterior (Hayward and Hayward anti-de Sitter black holes) and interior (de Sitter) spacetimes. These spacetimes are connected at a thin-shell by considering Visser cut and paste techniq...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2021-03, Vol.132 (3), p.381-393
Main Authors: Sharif, M., Faisal Javed
Format: Article
Language:English
Subjects:
Analysis
Astrophysics
Classical and Quantum Gravitation
Collapse
Configurations
Cosmological constant
Dynamic stability
Elementary Particles
Equations of motion
Fields
Flux density
Gravitation
Mathematical analysis
Nuclei
Particle and Nuclear Physics
Particles
Perturbation
Physics
Physics and Astronomy
Quantum Field Theory
Relativity Theory
Scalars
Solid State Physics
Spacetime
Surface energy
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Summary:This paper explores the stable and dynamical configuration of thin-shell gravastars developed from the matching of exterior (Hayward and Hayward anti-de Sitter black holes) and interior (de Sitter) spacetimes. These spacetimes are connected at a thin-shell by considering Visser cut and paste technique. The matter surface energy density and pressure are formulated from the Lanczos equations. We consider the shaded regions to discuss the stability of gravastars by using radial perturbation at the equilibrium shell radius. We then observe thin-shell dynamics with massless as well as massive scalar field through equations of motion and Klein-Gordon equations. The respective scalar thin-shell represents collapse and expansion of the developed structure with the shell radius, velocity and effective potential. We conclude that stable regions of gravastar shell decrease and dynamical configuration (collapse and expansion) increase with cosmological constant.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776121030109