Matter without matter: novel Kaluza-Klein spacetime in Einstein-Gauss-Bonnet gravity

Abstract

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 $d=4$.

13 pages, 1 figure, result for $d=2$ corrected, 3 references added, final version to appear in Phys. Rev. D

References in corpus (2)

• Taub-NUT/Bolt Black Holes in Gauss-Bonnet-Maxwell Gravity
• Kaluza-Klein black hole with negatively curved extra dimensions in string generated gravity models

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• Origin of matter out of pure curvature
• Summary of session A4 at the GRG18 conference: Alternative Theories of Gravity
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