Abstract
It was previously proved that the Gödel-type metrics with flat three-dimensional background metric solve exactly the field equations of the Einstein-Aether theory in four dimensions. We generalize this result by showing that the stationary Gödel-type metrics with nonflat background in D dimensions solve exactly the field equations of the Einstein-Aether theory. The reduced field equations are the \((D-1)\)-dimensional Euclidean Ricci-flat and the \((D-1)\)-dimensional source-free Maxwell equations, and the parameters of the theory are left free except \(c_{1}-c_{3}=1\). We give a method to produce exact solutions of the Einstein-Aether theory from the Gödel-type metrics in D dimensions. By using this method, we present explicit exact solutions to the theory by considering the particular cases: (\(D-1\))-dimensional Euclidean flat, conformally flat, and Tangherlini backgrounds.
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Notes
These scalings were initially intended to get rid of the constraint \(c_1-c_3=1\) and also have solutions with nonzero cosmological constant. However, at the end, it turned out that this is not possible (see Proposition 5 below).
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We thank the referee for carefully reading our manuscript and providing constructive comments. This work is partially supported by the Scientific and Technological Research Council of Turkey (TUBITAK).
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Gürses, M., Şentürk, Ç. Gödel-type metrics in Einstein-Aether theory II: nonflat background in arbitrary dimensions. Gen Relativ Gravit 48, 63 (2016). https://doi.org/10.1007/s10714-016-2058-x
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DOI: https://doi.org/10.1007/s10714-016-2058-x