Abstract

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.

中文翻译：

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常规薄壳重力星的稳定性和动力学

摘要

本文探索了由外部（Hayward和Hayward anti-de Sitter黑洞）与内部（de Sitter）时空的匹配发展而来的薄壳引力星的稳定和动力学构型。通过考虑使用Visser剪切和粘贴技术，可以将这些时空连接在薄壳上。物质表面能的密度和压力由Lanczos方程式表示。我们考虑阴影区域，以通过在平衡壳半径处使用径向扰动来讨论重力星的稳定性。然后，我们通过运动方程式和Klein-Gordon方程式来观察具有无质量以及标量场的薄壳动力学。各个标量的薄壳用壳半径，速度和有效势来表示展开结构的塌陷和膨胀。