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Type: Artigo de periódico
Title: Newtonian and General Relativistic models of spherical shells - II
Author: Vogt, D
Letelier, PS
Abstract: A family of potential-density pairs that represent spherical shells with finite thickness is obtained from the superposition of spheres with finite radii. Other families of shells with infinite thickness with a central hole are obtained by inversion transformations of spheres and of the finite shells. We also present a family of double shells with finite thickness. All potential-density pairs are analytical and can be stated in terms of elementary functions. For the above-mentioned structures, we study the circular orbits of test particles and their stability with respect to radial perturbations. All examples presented are found to be stable. A particular isotropic form of a metric in spherical coordinates is used to construct a General Relativistic version of the Newtonian families of spheres and shells. The matter of these structures is anisotropic, and the degree of anisotropy is a function of the radius.
Subject: gravitation
galaxies: kinematics and dynamics
Country: EUA
Editor: Wiley-blackwell
Rights: aberto
Identifier DOI: 10.1111/j.1365-2966.2010.16863.x
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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