Browsing Doctoral Degrees (Applied Mathematics) by Subject "Astrophysics."

Now showing items 1-5 of 5

    • Differential equations for relativistic radiating stars. 

      Abebe, Gezahegn Zewdie. (2013)
      We consider radiating spherical stars in general relativity when they are conformally flat, geodesic with shear, and accelerating, expanding and shearing. We study the junction conditions relating the pressure to the ...

    • Exact models of compact stars with equations of state. 

      Takisa, Pedro Mafa. (2013)
      We study exact solutions to the Einstein-Maxwell system of equations and relate them to compact objects. It is well known that there are substantial analytic difficulties in the modelling of self-gravitating, static fluid ...

    • Group theoretic approach to heat conducting gravitating systems. 

      Nyonyi, Yusuf. (2013)
      We study shear-free heat conducting spherically symmetric gravitating fluids defined in four and higher dimensional spacetimes. We analyse models that are both uncharged and charged via the pressure isotropy condition ...

    • Relativistic radiating stars with generalised atmospheres. 

      Govender, Gabriel. (2010)
      In this dissertation we construct radiating models for dense compact stars in relativistic astrophysics. We first utilise the standard Santos (1985) junction condition to model Euclidean stars. By making use of the ...

    • Thermal evolution of radiation spheres undergoing dissipative gravitational collapse. 

      Reddy, Kevin Poobalan. (2014)
      In this study we investigate the physics of a relativistic radiating star undergoing dissipative collapse in the form of a radial heat flux. Our treatment clearly demonstrates how the presence of shear affects the collapse ...