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- Title
A charged perfect fluid solution.
- Authors
Estevez-Delgado, Joaquin; Cabrera, Jose Vega; Paulin-Fuentes, Jorge Mauricio; Rodriguez Ceballos, Joel Arturo; Duran, Modesto Pineda
- Abstract
A static and spherically symmetric stellar model is described by a perfect charged fluid. Its construction is done using the solution of the Einstein–Maxwell equations for which we specify the temporal metric and the electric field which is a monotonic increasing function null in the center. The density, pressure and speed of sound turn out to be regular functions, positive and monotonic decreasing as function of the radial distance. Also, the speed of sound is lower than the speed of light, that is to say, it does not violate the condition of causality. The value of compactness u = G M / c 2 R ≤ 0. 4 1 1 6 5 0 8 , so the model is useful to represent neutron stars of quark stars. In a complementary manner, we report the physical values when describing a star of mass M = 1. 5 M ⊙ and radius R = 5 3 8 0. 0 5 8 m , in such case u = 0. 4 1 1 6 5 0 8 , and given the presence of the charge, the interval for the central density ρ c ∈ [ 5. 6 1 3 1 0 8 , 6. 8 1 9 9 1 3 ] 1 0 1 8 Kg/mˆ3.
- Subjects
SPEED of sound; MONOTONIC functions; QUARK matter; SPEED of light; SOUND pressure; STELLAR mass; EINSTEIN field equations; NEUTRON stars; EINSTEIN-Maxwell equations
- Publication
Modern Physics Letters A, 2020, Vol 35, Issue 15, pN.PAG
- ISSN
0217-7323
- Publication type
Article
- DOI
10.1142/S0217732320501205