Domain wall space-times with a cosmological constant

Details Domain wall space-times with a cosmological constant Domain wall space-times with a cosmological constant

2010-12-23

arxiv.org/abs/1012.5252v2

Phys.Rev.D83:084014,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages. no figure

Scientific paper

10.1103/PhysRevD.83.084014

We solve vacuum Einstein's field equations with the cosmological constant in space-times admitting 3-parameter group of isometries with 2-dimensional space-like orbits. The general exact solutions, which are represented in the advanced and retarded null coordinates, have two arbitrary functions due to the freedom of choosing null coordinates. In the thin-wall approximation, the Israel's junction conditions yield one constraint equation on these two functions in spherical, planar, and hyperbolic domain wall space-times with reflection symmetry. The remain freedom of choosing coordinates are completely fixed by requiring that when surface energy density $\sigma_0$ of domain walls vanishes, the metric solutions will return to some well-known solutions. It leads us to find a planar domain wall solution, which is conformally flat, in the de Sitter universe.

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