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Xie, Yiqi; Zhang, Jun; Silva, Hector O.; de Rham, Claudia; Witek, Helvi; Yunes, Nicolás
Physical review letters, 06/2021, Letnik: 126, Številka: 24Journal Article
The metric of a spacetime can be greatly simplified if the spacetime is circular. We prove that in generic effective theories of gravity, the spacetime of a stationary, axisymmetric, and asymptotically flat solution must be circular if the solution can be obtained perturbatively from a solution in the general relativity limit. This result applies to a broad class of gravitational theories that include arbitrary scalars and vectors in their light sector, so long as their nonstandard kinetic terms and nonmininal couplings to gravity are treated perturbatively.
