Quasinormal modes and absorption cross-sections of Born-Infeld-de Sitter black holes

被引：28

作者：

Breton, Nora ^{[1
]}

Clark, Tyler ^{[2
]}

Fernando, Sharmanthie ^{[2
]}

机构：

[1] IPN, Ctr Invest & Estudios Avanzados, Dept Fis, Apdo 14-740, Mexico City, DF, Mexico

[2] Northern Kentucky Univ, Dept Phys Geol & Engn Technol, Highland Hts, KY 41099 USA

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2017年 / 26卷 / 10期

关键词：

Born-Infeld; absorption cross-sections; scalar perturbations; WKB; FOUNDATIONS; STABILITY; FIELD;

D O I：

10.1142/S0218271817501127

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we have studied QNM modes and absorption cross-sections of Born-Infeld-de Sitter black holes. WKB approximation is employed to compute the QNM modes of massless scalar fields. We have also used null geodesics to compute quasinormal modes in the eikonal approximation. In the eikonal limit, QNMs of black holes are determined by the parameters of the circular null geodesics. Unstable circular null orbits are derived from the effective metric which is obeyed by light rays under the influence of a nonlinear electromagnetic field. Comparison is shown with the QNM of the linear electromagnetic counterpart, the Reissner-Nordstrom black hole. Furthermore, the null geodesics are employed to compute the absorption cross-sections in the high frequency limit via the sinc approximation.

引用

页数：27

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