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Departamento de Física Teórica, Universidade do Estado do Rio de Janeiro,

By Observatório Nacional, Rua General, José Cristino, M. A. F. Da Silva and Jaime F. Villas Da Rocha

Abstract

We have constructed a star model consisting of four parts: (i) a homogeneous inner core with anisotropic pressure (ii) an infinitesimal thin shell separating the core and the envelope; (iii) an envelope of inhomogeneous density and isotropic pressure; (iv) an infinitesimal thin shell matching the envelope boundary and the exterior Schwarzschild spacetime. We have analyzed all the energy conditions for the core, envelope and the two thin shells. We have found that, in order to have a static solutions, at least one of the regions must be constituted by dark energy. The results show that there is no physical reason to have a superior limit for the mass of these objects but for the ratio of mass and radius

Year: 2009
OAI identifier: oai:CiteSeerX.psu:10.1.1.313.5253
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