Rotating black hole in Einstein and pure Lovelock gravity

Abstract

We obtain rotating black hole metric for higher dimensional Einstein and pure Lovelock gravity by employing two independent and well motivated methods. One is based on the principle of incorporation of Newtonian acceleration for timelike motion while no acceleration for null motion. The other is the well known Newman-Janis alogrithm that converts a static black hole into a rotating one through a complex transformation. It turns out that both the methods give the same metric which for Einst of the eour pure Lovelock metricein black hole is an exact vacuum solution while for pure Lovelock black hole it satisfies the vacuum equation in the leading order. However it shares all the physical properties with the well known Kerr black hole.

5 pages, substantial changes including title and abstract, one additional method to obtain the same metric, the main result remains unchanged, many references added