Perturbations and absorption cross section of infinite-radius black rings

Vitor Cardoso; Oscar J.C. Dias; Shijun Yoshida

doi:10.1103/PhysRevD.72.024025

Perturbations and absorption cross section of infinite-radius black rings

Vitor Cardoso, Oscar J.C. Dias, Shijun Yoshida

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We study scalar field perturbations on the background of nonsupersymmetric black rings and of supersymmetric black rings. In the infinite-radius limit of these geometries, we are able to separate the wave equation, and to study wave phenomena in its vicinities. In this limit, we show that (i) the nonsupersymmetric case is stable against scalar field perturbations, (ii) the low energy absorption cross section for scalar fields is equal to the area of the event horizon in the supersymmetric case, and proportional to it in the nonsupersymmetric situation.

Original language	English
Article number	024025
Pages (from-to)	1-16
Number of pages	16
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	72
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevD.72.024025
Publication status	Published - 2005 Jul 15
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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N2 - We study scalar field perturbations on the background of nonsupersymmetric black rings and of supersymmetric black rings. In the infinite-radius limit of these geometries, we are able to separate the wave equation, and to study wave phenomena in its vicinities. In this limit, we show that (i) the nonsupersymmetric case is stable against scalar field perturbations, (ii) the low energy absorption cross section for scalar fields is equal to the area of the event horizon in the supersymmetric case, and proportional to it in the nonsupersymmetric situation.

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Perturbations and absorption cross section of infinite-radius black rings

Abstract

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