Applicability of the Newman-Janis algorithm to black hole solutions of modified gravity theories
Devin HansenDepartment of Physics, Montana State University, Bozeman, Montana 59717, USANicolás YunesDepartment of Physics, Montana State University, Bozeman, Montana 59717, USA
2013en
ABI
Abstract
The Newman-Janis algorithm has been widely used to construct rotating black hole solutions from nonrotating counterparts. While this algorithm was developed within general relativity (GR), it has more recently been applied to nonrotating solutions in modified gravity theories. We find that the application of the Newman-Janis algorithm to an arbitrary non-GR spherically symmetric solution introduces pathologies in the resulting axially symmetric metric. This then establishes that, in general, the Newman-Janis algorithm should not be used to construct rotating black hole solutions outside of General Relativity.
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Cited by 60 references