Dynamics of scalar fields in the background of rotating black holes. II. A note on superradiance
Dynamics of scalar fields in the background of rotating black holes. II. A note on superradiance
We analyze the amplification due to so-called superradiance from the scattering of pulses off rotating black holes as a numerical time evolution problem. We consider the “worst possible case” of scalar field pulses for which superradiance effects yield amplifications <1%. We show that this small effect can be isolated by numerically evolving quasi-monochromatic, modulated pulses with a recently developed Teukolsky code. The results show that it is possible to study superradiance in the time domain, but only if the initial data is carefully tuned. This illustrates the intrinsic difficulties of detecting superradiance in more general evolution scenarios.
1-4
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Laguna, Pablo
c1176fd8-1ef9-4f66-87b7-3b705e49b347
Papadopoulos, Philippos
955b8351-d6e2-48d5-a6bb-79d17117eed6
1998
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Laguna, Pablo
c1176fd8-1ef9-4f66-87b7-3b705e49b347
Papadopoulos, Philippos
955b8351-d6e2-48d5-a6bb-79d17117eed6
Andersson, Nils, Laguna, Pablo and Papadopoulos, Philippos
(1998)
Dynamics of scalar fields in the background of rotating black holes. II. A note on superradiance.
Physical Review D, 58 (8), .
(doi:10.1103/PhysRevD.58.087503).
Abstract
We analyze the amplification due to so-called superradiance from the scattering of pulses off rotating black holes as a numerical time evolution problem. We consider the “worst possible case” of scalar field pulses for which superradiance effects yield amplifications <1%. We show that this small effect can be isolated by numerically evolving quasi-monochromatic, modulated pulses with a recently developed Teukolsky code. The results show that it is possible to study superradiance in the time domain, but only if the initial data is carefully tuned. This illustrates the intrinsic difficulties of detecting superradiance in more general evolution scenarios.
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Published date: 1998
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Local EPrints ID: 29424
URI: http://eprints.soton.ac.uk/id/eprint/29424
ISSN: 1550-7998
PURE UUID: fddb7ff7-f932-4cf9-b52c-7244b5e4a8a8
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Date deposited: 13 Mar 2007
Last modified: 16 Mar 2024 03:01
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Author:
Pablo Laguna
Author:
Philippos Papadopoulos
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