Letter: Electromagnetic Mass-Models in General Relativity Reexamined |
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Authors: | J Ponce de Leon |
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Institution: | (1) Laboratory of Theoretical Physics, Department of Physics, University of Peurto Rico, P.O. Box 23343, San Juan, Peurto Rico, 00931 |
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Abstract: | The problem of constructing a model of an extended charged particle within the context of general relativity has a long and distinguished history. The distinctive feature of these models is that, in some way or another, they require the presence of negative mass in order to maintain stability against Coulomb's repulsion. Typically, the particle contains a core of negative mass surrounded by a positive-mass outer layer, which emerges from the Reissner-Nordström field. In this work we show how the Einstein-Maxwell field equations can be used to construct an extended model where the mass is positive everywhere. This requires the principal pressures to be unequal inside the particle. The model is obtained by setting the effective matter density, rather than the rest matter density, equal to zero. The Schwarzschild mass of the particle arises from the electrical and gravitational field (Weyl tensor) energy. The model satisfies the energy conditions of Hawking and Ellis. A particular solution that illustrates the results is presented. |
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Keywords: | Extended charged particle Schwarzschild mass Weyl tensor |
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