The Linet-Tian solution with a positive cosmological constant in four and higher dimensions

Details The Linet-Tian solution with a positive cosmological constant in four and higher dimensions The Linet-Tian solution with a positive cosmological constant in four and higher dimensions

2010-02-22

arxiv.org/abs/1002.4115v1

Phys.Rev.D81:064015,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 1 figure. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.064015

The static, apparently cylindrically symmetric vacuum solution of Linet and Tian for the case of a positive cosmological constant $\Lambda$ is shown to have toroidal symmetry and, besides $\Lambda$, to include three arbitrary parameters. It possesses two curvature singularities, of which one can be removed by matching it across a toroidal surface to a corresponding region of the dust-filled Einstein static universe. In four dimensions, this clarifies the geometrical properties, the coordinate ranges and the meaning of the parameters in this solution. Some other properties and limiting cases of this space-time are described. Its generalisation to any higher number of dimensions is also explicitly given.

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