Document Type : Regular article
Author
Department of Theoretical Physics, IFIN-HH, Magurele, Romania; Department of Physics, University of Bucharest, Bucharest, Romania.
Abstract
We investigate the hidden symmetries and existence of Killing spinors of D=5 minimal gauged supergravity solutions which admit a Killing-Maxwell system in the sense of Carter, such as the Chong-Cvetic-Lü-Pope (CCLP) Kerr-dS black hole spacetime and a 5-dimensional minimal gauged supergravity solution endowed with a Sasaki structure deformed by torsion, a limiting case of the generalization of the 5-dimensional toric Sasaki-Einstein La,b,c spacetime. We note that when an electromagnetic tensor is present and an associated Killing-Maxwell system can be constructed in the sense of Carter, the Killing-Maxwell field becomes a PCKY (principal conformal Killing-Yano) tensor or a PGCKY (principal generalized conformal Killing-Yano) tensor, the latter in the presence of torsion. We find some new hidden symmetries of the Chong-Cvetic-Lü-Pope black hole, i.e. we construct two more generalized Stäckel-Killing tensors and the associated generalized Killing-Yano (GKY) tensors. We also explicitly construct a Killing spinor for the specific 5-dimensional minimal gauged supergravity solution that is endowed with a Sasaki structure deformed by torsion mentioned above.
Keywords
Main Subjects