Superradiance in static black hole spacetimes

被引：52

作者：

Benone, Carolina L. ^{[1
]}

Crispino, Luis C. B. ^{[1
]}

机构：

[1] Fed Univ Para, Fac Fis, BR-66075110 Belem, Para, Brazil

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 02期

关键词：

ELECTROMAGNETIC SCATTERING; EMISSION-SPECTRA; SCALAR WAVES; ABSORPTION; OBJECTS; CHARGE;

D O I：

10.1103/PhysRevD.93.024028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the absorption of a massive and charged scalar field in a Reissner-Nordstrom background. We compare our numerical results for the absorption cross section, obtained for arbitrary frequencies, with the low- and high-frequency limits. We find, in particular, that the total absorption cross section can be negative, showing that planar scalar waves can be superradiantly amplified by black holes.

引用

页数：6

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