Bio
Jefta M. Sunzu is a researcher at the University of Dodoma, Tanzania. He holds a PhD in Applied Mathematics from the University of KwaZulu-Natal, and his research focuses on relativistic astrophysics, exact models of compact stars, and anisotropic matter distributions. He has authored works such as 'Regular Exact Models with Vanishing Anisotropy Generated using Van Der' and 'Realistic Polytropic Models for Neutral Stars with Vanishing Pressure Anisotropy'. With 44 publications, over 870 citations, and an h-index of 15, he also serves as a reviewer for the Global Journal of Science Frontier Research.
Educational Journey
University of Kwazulu Natal
PhD in Applied Mathematics in Mathematical Sciences • Mathematical Sciences
2015Experience
Research
Realistic Polytropic Models for Neutral Stars with Vanishing Pressure Anisotropy
We find new exact models for the Einstein-Maxwell equations using the polytropic equation of state. The models generated satisfy uncharged star with anisotropy present. It is interesting that our anisotropic polytropic models contain isotropic case at the vanishing point of anisotropic parameters. In all models, the matter variables and gravitational potentials are well behaved. The radial and tangential pressures are compared at different values of polytropic index.
Regular Exact Models with Vanishing Anisotropy Generated using Van Der
In this paper, new exact models for Einstein field equations are generated using a Van der Waals equation of state. We consider anisotropic stellar objects with no electromagneticfield distribution. Our models contain previous results as a special case. Modelsgeneralized in our performance include a familiar uncharged Einstein model with no pressure anisotropy. It is interesting that our models indicate that when matter variables vanish, gravitational potentials remain constant. This condition agrees with Minkowski spacetime. The physical features of our models show that the gravitational potentials and matter variables are well behaved. We also compute relativistic stellar masses and radii consistent with the stars PSR J1614-2230, Vela X-1, 4U 1538-52, LMC X-4, SMC X-4, Cen X-3, Her X-1, SAX J1808.4- 3658 and EXO 1785-248.
