Higher-dimensional black holes with multiple equal rotations

Article

Higher-dimensional black holes with multiple equal rotations

Polášková E.; Krtouš P.

Phys. Rev. D 105(4), 21 (2022)

Abstract

We study a limit of the Kerr-(A)dS spacetime in a general dimension where an arbitrary number of its rotational parameters is set equal. The resulting metric after the limit formally splits into two parts-the first part has the form of the Kerr-NUT-(A)dS metric analogous to the metric of the entire spacetime, but only for the directions not subject to the limit, and the second part can be interpreted as the Kahler metrics. However, this separation is not integrable, thus it does not lead to a product of independent manifolds. We also reconstruct the original number of explicit and hidden symmetries associated with Killing vectors and Killing tensors. Therefore, the resulting spacetime represents a special subcase of the generalized Kerr- NUT-(A)dS metric that retains the full Killing tower of symmetries. In D 1/4 6, we present evidence of an enhanced symmetry structure after the limit. Namely, we find additional Killing vectors and show that one of the Killing tensors becomes reducible as it can be decomposed into Killing vectors.

Institute authors

Krtouš, Pavel

Supported by

GACR 20-05421S — Exact Spacetimes in Einstein’s Theory, Quadratic Gravity, and Other Generalizations
GAUK 514218 — Studium prostoročasů s NUT parametry v obecné teorii relativity

BibTeX

@article{UTF922,
  author        = {Polášková E. and Krtouš P.},
  title         = {{Higher-dimensional black holes with multiple equal rotations}},
  journal       = {Phys. Rev. D},
  volume        = {105},
  number        = {4},
  pages         = {21},
  year          = {2022},
  month         = {2},
  doi           = {10.1103/PhysRevD.105.044041},
}