Regular Article - Theoretical Physics
Anomalous Lense–Thirring precession in Kerr–Taub–NUT spacetimes
Saha Institute of Nuclear Physics, Kolkata, 700064, India
* e-mail: email@example.com
Accepted: 6 November 2015
Published online: 1 December 2015
Exact Lense–Thirring (LT) precession in Kerr–Taub–NUT spacetime is reviewed. It is shown that the LT precession does not obey the general inverse cube law of distance at strong gravity regime in Kerr–Taub–NUT spacetime. Rather, it becomes maximum just near the horizon, falls sharply and becomes zero near the horizon. The precession rate increases again and after that it falls obeying the general inverse cube law of distance. This anomaly is maximum at the polar region of this spacetime and it vanishes after crossing a certain ‘critical’ angle towards the equator from the pole. We highlight that this particular ‘anomaly’ also arises in the LT effect at the interior spacetime of the pulsars and such a signature could be used to identify a role of Taub–NUT solutions in the astrophysical observations or equivalently, a signature of the existence of a NUT charge in the pulsars. In addition, we show that if the Kerr–Taub–NUT spacetime rotates with the angular momentum (mass dual mass), the inner horizon goes to and only the event horizon exists at the distance .
© The Author(s), 2015