Quasinormal modes as a distinguisher between general relativity and f (R) gravity: charged black-holes

被引：22

作者：

Bhattacharyya, Soham ^{[1
]}

Shankaranarayanan, S. ^{[2
]}

机构：

[1] Indian Inst Sci Educ & Res Thiruvananthapuram IIS, Sch Phys, Trivandrum 695551, Kerala, India

[2] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

来源：

EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 09期

关键词：

GRAVITATIONAL-RADIATION; HIGH-FREQUENCY; PERTURBATIONS; STABILITY; ENERGY; INFLATION; TERMS; LIMIT;

D O I：

10.1140/epjc/s10052-018-6222-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The ring-down phase of black-hole perturbations is governed by the quasi-normal modes (QNM) and offer valuable insight into the nature of the objects emitting them, raising an interesting question: whether QNM5 can be used to distinguish between theories of gravity? We construct a consistency test of general relativity (GR) which enables one to distinguish between general relativity and a specific class of modified theories of gravity: f (R). We show that an energetic inequality between scalar (polar) and vector (axial) type gravitational perturbations will exist for Reissner-Nordstrom solutions of GR - using which we find a novel method of determining the charge of a non-spinning black hole in GR. We then show that there will be a further energetic difference for charged black holes in f (R). Finally, we utilize this extra difference to construct a parameter to quantify deviation from GR.

引用

页数：14

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