Radiating stars with generalised Vaidya atmospheres

Abstract

We model the gravitational behaviour of a radiating star when the exterior geometry is the generalised Vaidya spacetime. The interior matter distribution is shear-free and undergoing radial heat flow. The exterior energy momentum tensor is a superposition of a null fluid and a string fluid. An analysis of the junction conditions at the stellar surface shows that the pressure at the boundary depends on the interior heat flux and the exterior string density. The results for a relativistic radiating star undergoing nonadiabatic collapse are obtained as a special case. For a particular model we demonstrate that the radiating fluid sphere collapses without the appearance of the horizon at the boundary.

10 pages, To appear in Gen. Relativ. Gravit

References in corpus (8)

• Nonadiabatic charged spherical gravitational collapse
• Some analytical models of radiating collapsing spheres
• Spherical gravitational collapse in N-dimensions
• Nonlinear Shear-free Radiative Collapse
• A Riccati equation in radiative stellar collapse
• Radiating relativistic matter in geodesic motion
• Radiating Gravitational Collapse with an Initial Inhomogeneous Energy Density Distribution
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Cited by in corpus (15)

• Gravitational Collapse in Rastall Gravity
• The role of shear in dissipative gravitational collapse
• Vaidya and generalized Vaidya solutions by gravitational decoupling
• Non-singular Brans-Dicke collapse in deformed phase space
• Conformal symmetries in generalised Vaidya spacetimes
• Dynamical conditions and causal transport of dissipative spherical collapse in $f(R,T)$ gravity
• Higher dimensional charged shear-free relativistic models with heat flux
• Trapped surfaces and nature of singularities in Lyra's geometry
• Radiating fluid sphere immersed in an anisotropic atmosphere
• The Negative Energy in Generalized Vaidya Spacetime
• Vaidya Spacetime in the Diagonal Coordinates
• Gravitational Collapse without Singularity Formation in Brans-Dicke Theory
• On maximal analytical extension of the Vaidya metric
• Singularity Avoidance in Gravitational Collapse of an Inhomogeneous Fluid in Rastall Gravity
• Stability and Horizon Formation during Dissipative Collapse