Perturbations in the Kerr-Newman dilatonic black hole background: Maxwell waves

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.4948· OSTI ID:632696

Casadio, R; Harms, B; Leblanc, Y ^[1]; Cox, P H ^[2]

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1. Department of Physics and Astronomy, The University of Alabama, Box 870324, Tuscaloosa, Alabama 35487-0324 (United States)
2. Physics Department, Texas AM University-Kingsville, Kingsville, Texas 78363 (United States)

In this paper we analyze the perturbations of the Kerr-Newman dilatonic black hole background. For this purpose we perfom a double expansion in both the background electric charge and the wave parameters of the relevant quantities in the Newman-Penrose formalism. We then display the gravitational, dilatonic, and electromagnetic equations, which reproduce the static solution (at zero order in the wave parameter) and the corresponding wave equations in the Kerr background (at first order in the wave parameter and zero order in the electric charge). At higher orders in the electric charge one encounters corrections to the propagation of waves induced by the presence of a nonvanishing dilaton. An explicit computation is carried out for the electromagnetic waves up to the asymptotic form of the Maxwell field perturbations produced by the interaction with dilatonic waves. A simple physical model is proposed which could make these perturbations relevant in the detection of radiation coming from the region of space near a black hole. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: FG02-96ER40967
• OSTI ID: 632696
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 8 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BLACK HOLES
CORRECTIONS
ELECTRIC CHARGES
FIELD EQUATIONS
KERR METRIC
MAXWELL EQUATIONS
PERTURBATION THEORY
QUANTUM GRAVITY
RADIATIONS
WAVE PROPAGATION