• M Govender

      Articles written in Pramana – Journal of Physics

    • Temperature evolution during dissipative collapse

      S D Maharaj G Govender M Govender

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      We investigate the gravitational collapse of a radiating sphere evolving into a final static configuration described by the interior Schwarzschild solution. The temperature profiles of this particular model are obtained within the framework of causal thermodynamics. The overall temperature evolution is enhanced by contributions from the temperature gradient induced by perturbations as well as relaxational effects within the stellar core.

    • The final outcome of dissipative collapse in the presence of 𝛬

      S Thirukkanesh S Moopanar M Govender

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      We investigate the role played by the cosmological constant during gravitational collapse of a radiating star with vanishing Weyl stresses in the interior. We highlight the role played by the cosmological constant during the latter stages of collapse. The evolution of the temperature of the collapsing body is studied by employing causal heat transport equation. We show that the inclusion of the cosmological constant enhances the temperature within the stellar core.

    • Thermal evolution of the Kramer radiating star

      M Govender S D Maharaj L Mkhize D B Lortan

      More Details Abstract Fulltext PDF

      The Kramer radiating star uses the interior Schwarzschild solution as a seed solution to generate a model of dissipative collapse. We investigate the thermal behaviour of the radiating star by employing a causal heat transport equation. The causal temperature is explicitly determined for the first time by integrating the transport equation. We further show that the dissipation of energy to the exterior space-time renders the core more unstable than the cooler surface layers.

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