Observational constraints on the regularized 4D Einstein-Gauss-Bonnet theory of gravity

被引：65

作者：

Clifton, Timothy ^{[1
]}

Carrilho, Pedro ^{[1
]}

Fernandes, Pedro G. S. ^{[1
]}

Mulryne, David J. ^{[1
]}

机构：

[1] Queen Mary Univ London, Sch Phys & Astron, Mile End Rd, London E1 4NS, England

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 08期

基金：

英国科学技术设施理事会;

关键词：

GENERAL-RELATIVITY; BLACK-HOLES; TENSOR; LIMIT; PULSAR; SYSTEM; TESTS;

D O I：

10.1103/PhysRevD.102.084005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we study the observational constraints that can be imposed on the coupling parameter (a) over cap of the regularized version of the four-dimensional Einstein-Gauss-Bonnet theory of gravity. We use the scalartensor field equations of this theory to perform a thorough investigation of its slow-motion and weak-field limit and apply our results to observations of a wide array of physical systems that admit such a description. We find that the Laser Geometric Environmental Observation Survey satellites are the most constraining, requiring vertical bar(a) over cap vertical bar less than or similar to 10(10) m(2). This constraint suggests that the possibility of large deviations from general relativity is small in all systems except the very early Universe (t < 10(-3) s) or the immediate vicinity of stellar-mass black holes (M less than or similar to 100 M-circle dot). We then consider constraints that can be imposed on this theory from cosmology, black hole systems, and tabletop experiments. It is found that early Universe inflation prohibits all but the smallest negative values of <(a)over cap>, while observations of binary black hole systems are likely to offer the tightest constraints on positive values, leading to overall bounds 0 less than or similar to (a) over cap less than or similar to 10(8) m(2).

引用

页数：16

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