Gravastar Solutions with Continuous Pressures and Equation of State

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dc.creatorDeBenedictis, A.
dc.creatorHorvat, D.
dc.creatorIlijic, S.
dc.creatorKloster, S.
dc.creatorViswanathan, K. S.
dc.date2005-11-17
dc.date2007-06-19
dc.date.accessioned2026-07-07T08:10:53Z
dc.date.available2026-07-07T08:10:53Z
dc.descriptionWe study the gravitational vacuum star (gravastar) configuration as proposed by other authors in a model where the interior de Sitter spacetime segment is continuously extended to the exterior Schwarzschild spacetime. The multilayered structure in previous papers is replaced by a continuous stress-energy tensor at the price of introducing anisotropy in the (fluid) model of the gravastar. Either with an ansatz for the equation of state connecting the radial $p_r$ and tangential $p_t$ pressure or with a calculated equation of state with non-homogeneous energy/fluid density, solutions are obtained which in all aspects satisfy the conditions expected for an anisotropic gravastar. Certain energy conditions have been shown to be obeyed and a polytropic equation of state has been derived. Stability of the solution with respect to possible axial perturbation is shown to hold.
dc.description19 pages, 9 figures. Latest version contains new and updated references along with some clarifying remarks in the stability analysis
dc.identifierhttps://arxiv.org/abs/gr-qc/0511097
dc.identifierhttp://arxiv.org/abs/gr-qc/0511097
dc.identifierClass.Quant.Grav. 23 (2006) 2303-2316
dc.identifierdoi:10.1088/0264-9381/23/7/007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131951
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleGravastar Solutions with Continuous Pressures and Equation of State
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