Absorption of electromagnetic and gravitational waves by Kerr black holes

被引：33
|
作者：
Leite, Luiz C. S. [1 ,2 ]
Dolan, Sam R. [2 ]
Crispino, Luis C. B. [1 ]
机构：
[1] Univ Fed Para, Fac Fis, BR-66075110 Belem, Para, Brazil
[2] Univ Sheffield, Sch Math & Stat, Consortium Fundamental Phys, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England
来源：
PHYSICS LETTERS B | 2017年 / 774卷
基金：
英国工程与自然科学研究理事会; 英国科学技术设施理事会;
关键词：
EQUATIONS;
D O I：
10.1016/j.physletb.2017.09.048
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the absorption cross section for planar waves incident upon Kerr black holes, and present a unified picture for scalar, electromagnetic and gravitational waves. We highlight the spin-helicity effect that arises from a coupling between the rotation of the black hole and the helicity of a circularly-polarized wave. For the case of on-axis incidence, we introduce an extended 'sine approximation' to quantify the spin-helicity effect in the strong-field regime. (c) 2017 The Author(s). Published by Elsevier B.V.
引用
收藏
页码：130 / 134
页数：5
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