Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-11-17
Phys.Rev.D75:044007,2007
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, 1 figure, result for $d=2$ corrected, 3 references added, final version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.75.044007
We consider Einstein-Gauss-Bonnet gravity in $n(\ge 6)$-dimensional Kaluza-Klein spacetime ${\ma M}^{4} \times {\ma K}^{n-4}$, where ${\ma K}^{n-4}$ is the Einstein space with negative curvature. In the case where ${\ma K}^{n-4}$ is the space of negative constant curvature, we have recently obtained a new static black-hole solution (Phys. Rev. D {\bf 74}, 021501(R) (2006), hep-th/0605031) which is a pure gravitational creation including Maxwell field in four-dimensional vacuum spacetime. The solution has been generalized to make it radially radiate null radiation representing gravitational creation of charged null dust. The same class of solutions though exists in spacetime ${\ma M}^{d} \times {\ma K}^{n-d}$ for $d=3,4$, however the gravitational creation of the Maxwell field is achieved only for $d=4$. Also, Gauss-Bonnet effect could be brought down to ${\ma M}^d$ only for $d=4$. Further some new exact solutions are obtained including its analogue in Taub-NUT spacetime on ${\ma M}^4$ for $d=4$.
Dadhich Naresh
Maeda Hideki
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