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Regular Bulk Solutions in Brane-worlds with Inhomogeneous Dust and Generalized Dark Radiation

Research paper by A. Herrera-Aguilar, A. M. Kuerten, Roldao da Rocha

Indexed on: 29 Jan '15Published on: 29 Jan '15Published in: General Relativity and Quantum Cosmology



Abstract

From the dynamics of a brane-world with matter fields present in the bulk, the bulk metric and the black string solution near the brane are generalized, when both the dynamics of inhomogeneous dust/generalized dark radiation on the brane-world and inhomogeneous dark radiation in the bulk as well are considered -- as exact dynamical collapse solutions. Based on the analysis on the inhomogeneous static exterior of a collapsing sphere of homogeneous dark radiation on the brane, the associated black string warped horizon is studied, as well as the 5D bulk metric near the brane. Moreover, the black string and the bulk are shown to be more regular upon time evolution, for suitable values for the dark radiation parameter in the model, by analyzing the physical soft singularities.