Regular Article - Theoretical Physics
The role of density inhomogeneity and anisotropy in the final outcome of dissipative collapse
Department of Mathematics, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
2 Institute of Systems Science, Durban University of Technology, 4000, Durban, South Africa
3 Astrophysics Research Centre, School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X54001, 4000, Durban, South Africa
Accepted: 5 November 2022
Published online: 15 November 2022
In this work, we employ the “horizon” function introduced by Ivanov (Int J Mod Phys D 25:1650049, 2016b) to study radiating stellar models with a generalized Vaidya exterior. Since the star is dissipating energy in the form of a radial heat flux, the radial pressure at the boundary is non-vanishing. We study the boundary condition which encodes the temporal behaviour of the model. Utilizing a scheme developed by Ivanov, we provide several solutions to the modified junction condition. We show that the presence of strings, allow for the collapse to a black hole or the complete burning of a star.
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