Dynamical symmetries in Brans-Dicke cosmology

被引：37

作者：

Papagiannopoulos, G. ^{[1
]}

Barrow, John D. ^{[2
]}

Basilakos, S. ^{[3
]}

Giacomini, A. ^{[4
]}

Paliathanasis, A. ^{[4
]}

机构：

[1] Univ Athens, Fac Phys, Dept Astron Astrophys Mech, Athens 15783, Greece

[2] Univ Cambridge, Ctr Math Sci, DAMTP, Wilberforce Rd, Cambridge CB3 0WA, England

[3] Acad Athens, Res Ctr Astron & Appl Math, Soranou Efesiou 4, Athens 11527, Greece

[4] Univ Austral Chile, Inst Ciencias Fis & Matemat, Valdivia 5090000, Chile

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 02期

关键词：

SCALAR-TENSOR THEORY; NOETHER SYMMETRY; MODELS; GRAVITY; CONSEQUENCES; CONSTRAINTS; EVOLUTION; LINKS;

D O I：

10.1103/PhysRevD.95.024021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the context of generalized Brans-Dicke cosmology we use the Killing tensors of the minisuperspace in order to determine the unspecified potential of a scalar-tensor gravity theory. Specifically, based on the existence of contact symmetries of the field equations, we find four types of potentials which provide exactly integrable dynamical systems. We investigate the dynamical properties of these potentials by using a critical point analysis and we find solutions which lead to cosmic acceleration and under specific conditions we can have de-Sitter points as stable late-time attractors.

引用

页数：11

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