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A comparative analysis of the adiabatic stability of anisotropic spherically symmetric solutions in general relativity

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Abstract

A family of static solutions of the Einstein field equations with spherical symmetry for a locally anisotropic fluid with homogeneous energy density is obtained. These solutions depend on two adjustable parameters related to degree of anisotropy of the fluid. Some known solutions may be recovered for specific values of these parameters. As a difference to other known solutions it is possible to change the grade of anisotropy of the model, keeping the same functional dependence on the coordinates. By means of a slow adiabatic contraction, the stability of the obtained solutions is studied. Also, it is shown, how it is possible to enhance the stability of the models by adjusting the parameters, and to obtain more compact configurations than those obtained with other similar anisotropic solutions, while the dominant or strong energy condition holds within the sphere.

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Authors and Affiliations

  1. Departamento de Física Aplicada, Facultad de Ingeniería, Universidad Central de Venezuela, Caracas, Venezuela

    M. Esculpi

  2. Coordinación de Ciencias Aplicadas, Universidad Marítima del Caribe, Catia la Mar, Estado Vargas, Venezuela

    M. Malaver

  3. Departamento de Formación General y Ciencias Básicas, Universidad Simón Bolivar, Caracas, Venezuela

    E. Aloma

Authors
  1. M. Esculpi
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  2. M. Malaver
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  3. E. Aloma
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Correspondence to E. Aloma.

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Esculpi, M., Malaver, M. & Aloma, E. A comparative analysis of the adiabatic stability of anisotropic spherically symmetric solutions in general relativity. Gen Relativ Gravit 39, 633–652 (2007). https://doi.org/10.1007/s10714-007-0409-3

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  • DOI: https://doi.org/10.1007/s10714-007-0409-3

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