IUCAA Preprints
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Item Relativistic Gravitational mass in Tolman-VI type solution(2011-07-06) Ray, Saibal; Das, BasantiSome known solutions for static charged fluid spheres of Tolman-VI type in general relativity are reexamined. The gravitational mass that appears in the Pant and Sah [1] and Tikekar [2] solutions is shown to be of electromagnetic origin in the sense that the gravitational mass, along with all other physical quantities, depends on the electromag- netic field alone. The energy condition, singularity and stability problems of the models are discussed thoroughly. VIItem Physical properties of Tolman-Bayin solutions: Some cases of static charged fluid spheres in general relativity(2005-05-01) Ray, Saibal; Rahaman, Farook; Ray, Subharthi; et al.In this article, Einstein-Maxwell space-time has been considered in connection to some of the astrophysical solutions as previously obtained by Tolman (1939) and Bayin (1978). The effect of inclusion of charge into these solutions has been investigated thoroughly and also the nature of fluid pressure and mass density throughout the sphere have been discussed. Mass-radius and mass-charge relations have been derived for various cases of the charged matter distribution. Two cases are obtained where perfect fluid with positive pressures give rise to electromagnetic mass models such that gravitational mass is of purely electromagnetic origin.