Null conformal Killing-Yano tensors and Birkhoff theorem
arXiv:1512.07057 · doi:10.1007/s10714-016-2036-3
Abstract
We study the space-times admitting a null conformal Killing-Yano tensor whose divergence defines a Killing vector. We analyze the similitudes and differences with the recently studied non null case (Gen. Relativ. Grav. (2015) {\bf 47} 1911). The results by Barnes concerning the Birkhoff theorem for the case of null orbits are analyzed and generalized.
10 pages