Class of Einstein-Maxwell-Dilaton-Axion Space-Times

Details Class of Einstein-Maxwell-Dilaton-Axion Space-Times Class of Einstein-Maxwell-Dilaton-Axion Space-Times

2009-05-26

arxiv.org/abs/0905.4097v1

Phys.Rev.D79:124016,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 2 figures 1 appendix

Scientific paper

10.1103/PhysRevD.79.124016

We use the harmonic maps ansatz to find exact solutions of the Einstein-Maxwell-Dilaton-Axion (EMDA) equations. The solutions are harmonic maps invariant to the symplectic real group in four dimensions $Sp(4,\Rreal)\sim O(5)$. We find solutions of the EMDA field equations for the one and two dimensional subspaces of the symplectic group. Specially, for illustration of the method, we find space-times that generalise the Schwarzschild solution with dilaton, axion and electromagnetic fields.

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