Massless field perturbations and gravitomagnetism in the Kerr-Taub-NUT spacetime

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Massless field perturbations and gravitomagnetism in the Kerr-Taub-NUT spacetime

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8567

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Title: Massless field perturbations and gravitomagnetism in the Kerr-Taub-NUT spacetime
Author: Bini, D. (Donato); Cherubini, Christian; Jantzen, Robert T.; Mashhoon, Bahram
Keywords: post-Newtonian approximation
Einstein-Maxwell spacetimes
spacetimes with fluids
Date: 2003-04-21
Publisher: American Physical Society
Citation: Phys. Rev. D 67, 084013 (2003) [8 pages]
Abstract: A single master equation is given describing spin s<~2 test fields that are gauge- and tetrad-invariant perturbations of the Kerr-Taub-NUT (Newman-Unti-Tamburino) spacetime representing a source with a mass M, gravitomagnetic monopole moment -l, and gravitomagnetic dipole moment (angular momentum) per unit mass a. This equation can be separated into its radial and angular parts. The behavior of the radial functions at infinity and near the horizon is studied and used to examine the influence of l on the phenomenon of superradiance, while the angular equation leads to spin-weighted spheroidal harmonic solutions generalizing those of the Kerr spacetime. Finally, the coupling between the spin of the perturbing field and the gravitomagnetic monopole moment is discussed.
URI: http://hdl.handle.net/10355/8567
ISSN: 0556-2821

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