The near-horizon geometry of dilaton-axion black holes
arXiv:gr-qc/0101040 · doi:10.1142/9789812777386_0207
Abstract
Static black holes of dilaton-axion gravity become singular in the extreme limit, which prevents a direct determination of their near-horizon geometry. This is addressed by first taking the near-horizon limit of extreme rotating NUT-less black holes, and then going to the static limit. The resulting four-dimensional geometry may be lifted to a Bertotti-Robinson-like solution of six-dimensional vacuum gravity, which also gives the near-horizon geometry of extreme Kaluza-Klein black holes in five dimensions.
2 pages, "mprocl.sty" with Latex 2.09, contribution to the 9th Marcel Grossmann meeting (MG9), Rome, July 2000