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  Dynamics of scalar fields in the background of rotating black holes II: A note on superradiance.

Andersson, N., Laguna, P., & Papadopoulos, P. (1998). Dynamics of scalar fields in the background of rotating black holes II: A note on superradiance. Physical Review D, 58(8): 087503. doi:10.1103/PhysRevD.58.087503.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5924-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5925-1
Genre: Journal Article

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9802059v1.pdf (Preprint), 134KB
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 Creators:
Andersson, Nils, Author
Laguna, Pablo, Author
Papadopoulos, Philippos1, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24013              

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 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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 Dates: 1998-10-15
 Publication Status: Published in print
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 Identifiers: eDoc: 206260
Other: arXiv:gr-qc/9802059v1
DOI: 10.1103/PhysRevD.58.087503
URI: http://link.aps.org/doi/10.1103/PhysRevD.58.087503
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 58 (8) Sequence Number: 087503 Start / End Page: - Identifier: ISSN: 0556-2821