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Stable Magnetic Universes Revisited

By Tayebeh Tahamtan and Mustafa Halilsoy


A regular class of static, cylindrically symmetric pure magnetic field metrics is rederived in a different metric ansatz in all dimensions. Radial, time dependent perturbations show that for dimensions d>3 such spacetimes are stable at both near r\approx0 and large radius r\rightarrow\infty. In a different gauge these stability analysis and similar results were known beforehand. For d=3, however, simultaneous stability requirement at both, near and far radial distances can not be reconciled for time - dependent perturbations. Restricted, numerical geodesics for neutral particles reveal a confinement around the center in the polar plane. Charged, time-like geodesics for d=4 on the other hand are shown numerically to run toward infinity.Comment: 11 pages, 3figure

Topics: General Relativity and Quantum Cosmology
Year: 2011
DOI identifier: 10.1007/s10509-012-1217-0
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